From 7b78b6986e714cbd7653b89287b928974eb5ee4f Mon Sep 17 00:00:00 2001 From: sanine Date: Sat, 1 Jan 2022 13:24:33 -0600 Subject: initial commit --- src/markdown/entity.c | 2190 ++++++++++++++++ src/markdown/entity.h | 42 + src/markdown/md4c-html.c | 573 +++++ src/markdown/md4c-html.h | 68 + src/markdown/md4c.c | 6383 ++++++++++++++++++++++++++++++++++++++++++++++ src/markdown/md4c.h | 405 +++ 6 files changed, 9661 insertions(+) create mode 100644 src/markdown/entity.c create mode 100644 src/markdown/entity.h create mode 100644 src/markdown/md4c-html.c create mode 100644 src/markdown/md4c-html.h create mode 100644 src/markdown/md4c.c create mode 100644 src/markdown/md4c.h (limited to 'src/markdown') diff --git a/src/markdown/entity.c b/src/markdown/entity.c new file mode 100644 index 0000000..9991ca1 --- /dev/null +++ b/src/markdown/entity.c @@ -0,0 +1,2190 @@ +/* + * MD4C: Markdown parser for C + * (http://github.com/mity/md4c) + * + * Copyright (c) 2016-2017 Martin Mitas + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include "entity.h" +#include + + +/* The table is generated from https://html.spec.whatwg.org/entities.json */ +static const struct entity entity_table[] = { + { "Æ", { 198, 0 } }, + { "&", { 38, 0 } }, + { "Á", { 193, 0 } }, + { "Ă", { 258, 0 } }, + { "Â", { 194, 0 } }, + { "А", { 1040, 0 } }, + { "𝔄", { 120068, 0 } }, + { "À", { 192, 0 } }, + { "Α", { 913, 0 } }, + { "Ā", { 256, 0 } }, + { "⩓", { 10835, 0 } }, + { "Ą", { 260, 0 } }, + { "𝔸", { 120120, 0 } }, + { "⁡", { 8289, 0 } }, + { "Å", { 197, 0 } }, + { "𝒜", { 119964, 0 } }, + { "≔", { 8788, 0 } }, + { "Ã", { 195, 0 } }, + { "Ä", { 196, 0 } }, + { "∖", { 8726, 0 } }, + { "⫧", { 10983, 0 } }, + { "⌆", { 8966, 0 } }, + { "Б", { 1041, 0 } }, + { "∵", { 8757, 0 } }, + { "ℬ", { 8492, 0 } }, + { "Β", { 914, 0 } }, + { "𝔅", { 120069, 0 } }, + { "𝔹", { 120121, 0 } }, + { "˘", { 728, 0 } }, + { "ℬ", { 8492, 0 } }, + { "≎", { 8782, 0 } }, + { "Ч", { 1063, 0 } }, + { "©", { 169, 0 } }, + { "Ć", { 262, 0 } }, + { "⋒", { 8914, 0 } }, + { "ⅅ", { 8517, 0 } }, + { "ℭ", { 8493, 0 } }, + { "Č", { 268, 0 } }, + { "Ç", { 199, 0 } }, + { "Ĉ", { 264, 0 } }, + { "∰", { 8752, 0 } }, + { "Ċ", { 266, 0 } }, + { "¸", { 184, 0 } }, + { "·", { 183, 0 } }, + { "ℭ", { 8493, 0 } }, + { "Χ", { 935, 0 } }, + { "⊙", { 8857, 0 } }, + { "⊖", { 8854, 0 } }, + { "⊕", { 8853, 0 } }, + { "⊗", { 8855, 0 } }, + { "∲", { 8754, 0 } }, + { "”", { 8221, 0 } }, + { "’", { 8217, 0 } }, + { "∷", { 8759, 0 } }, + { "⩴", { 10868, 0 } }, + { "≡", { 8801, 0 } }, + { "∯", { 8751, 0 } }, + { "∮", { 8750, 0 } }, + { "ℂ", { 8450, 0 } }, + { "∐", { 8720, 0 } }, + { "∳", { 8755, 0 } }, + { "⨯", { 10799, 0 } }, + { "𝒞", { 119966, 0 } }, + { "⋓", { 8915, 0 } }, + { "≍", { 8781, 0 } }, + { "ⅅ", { 8517, 0 } }, + { "⤑", { 10513, 0 } }, + { "Ђ", { 1026, 0 } }, + { "Ѕ", { 1029, 0 } }, + { "Џ", { 1039, 0 } }, + { "‡", { 8225, 0 } }, + { "↡", { 8609, 0 } }, + { "⫤", { 10980, 0 } }, + { "Ď", { 270, 0 } }, + { "Д", { 1044, 0 } }, + { "∇", { 8711, 0 } }, + { "Δ", { 916, 0 } }, + { "𝔇", { 120071, 0 } }, + { "´", { 180, 0 } }, + { "˙", { 729, 0 } }, + { "˝", { 733, 0 } }, + { "`", { 96, 0 } }, + { "˜", { 732, 0 } }, + { "⋄", { 8900, 0 } }, + { "ⅆ", { 8518, 0 } }, + { "𝔻", { 120123, 0 } }, + { "¨", { 168, 0 } }, + { "⃜", { 8412, 0 } }, + { "≐", { 8784, 0 } }, + { "∯", { 8751, 0 } }, + { "¨", { 168, 0 } }, + { "⇓", { 8659, 0 } }, + { "⇐", { 8656, 0 } }, + { "⇔", { 8660, 0 } }, + { "⫤", { 10980, 0 } }, + { "⟸", { 10232, 0 } }, + { "⟺", { 10234, 0 } }, + { "⟹", { 10233, 0 } }, + { "⇒", { 8658, 0 } }, + { "⊨", { 8872, 0 } }, + { "⇑", { 8657, 0 } }, + { "⇕", { 8661, 0 } }, + { "∥", { 8741, 0 } }, + { "↓", { 8595, 0 } }, + { "⤓", { 10515, 0 } }, + { "⇵", { 8693, 0 } }, + { "̑", { 785, 0 } }, + { "⥐", { 10576, 0 } }, + { "⥞", { 10590, 0 } }, + { "↽", { 8637, 0 } }, + { "⥖", { 10582, 0 } }, + { "⥟", { 10591, 0 } }, + { "⇁", { 8641, 0 } }, + { "⥗", { 10583, 0 } }, + { "⊤", { 8868, 0 } }, + { "↧", { 8615, 0 } }, + { "⇓", { 8659, 0 } }, + { "𝒟", { 119967, 0 } }, + { "Đ", { 272, 0 } }, + { "Ŋ", { 330, 0 } }, + { "Ð", { 208, 0 } }, + { "É", { 201, 0 } }, + { "Ě", { 282, 0 } }, + { "Ê", { 202, 0 } }, + { "Э", { 1069, 0 } }, + { "Ė", { 278, 0 } }, + { "𝔈", { 120072, 0 } }, + { "È", { 200, 0 } }, + { "∈", { 8712, 0 } }, + { "Ē", { 274, 0 } }, + { "◻", { 9723, 0 } }, + { "▫", { 9643, 0 } }, + { "Ę", { 280, 0 } }, + { "𝔼", { 120124, 0 } }, + { "Ε", { 917, 0 } }, + { "⩵", { 10869, 0 } }, + { "≂", { 8770, 0 } }, + { "⇌", { 8652, 0 } }, + { "ℰ", { 8496, 0 } }, + { "⩳", { 10867, 0 } }, + { "Η", { 919, 0 } }, + { "Ë", { 203, 0 } }, + { "∃", { 8707, 0 } }, + { "ⅇ", { 8519, 0 } }, + { "Ф", { 1060, 0 } }, + { "𝔉", { 120073, 0 } }, + { "◼", { 9724, 0 } }, + { "▪", { 9642, 0 } }, + { "𝔽", { 120125, 0 } }, + { "∀", { 8704, 0 } }, + { "ℱ", { 8497, 0 } }, + { "ℱ", { 8497, 0 } }, + { "Ѓ", { 1027, 0 } }, + { ">", { 62, 0 } }, + { "Γ", { 915, 0 } }, + { "Ϝ", { 988, 0 } }, + { "Ğ", { 286, 0 } }, + { "Ģ", { 290, 0 } }, + { "Ĝ", { 284, 0 } }, + { "Г", { 1043, 0 } }, + { "Ġ", { 288, 0 } }, + { "𝔊", { 120074, 0 } }, + { "⋙", { 8921, 0 } }, + { "𝔾", { 120126, 0 } }, + { "≥", { 8805, 0 } }, + { "⋛", { 8923, 0 } }, + { "≧", { 8807, 0 } }, + { "⪢", { 10914, 0 } }, + { "≷", { 8823, 0 } }, + { "⩾", { 10878, 0 } }, + { "≳", { 8819, 0 } }, + { "𝒢", { 119970, 0 } }, + { "≫", { 8811, 0 } }, + { "Ъ", { 1066, 0 } }, + { "ˇ", { 711, 0 } }, + { "^", { 94, 0 } }, + { "Ĥ", { 292, 0 } }, + { "ℌ", { 8460, 0 } }, + { "ℋ", { 8459, 0 } }, + { "ℍ", { 8461, 0 } }, + { "─", { 9472, 0 } }, + { "ℋ", { 8459, 0 } }, + { "Ħ", { 294, 0 } }, + { "≎", { 8782, 0 } }, + { "≏", { 8783, 0 } }, + { "Е", { 1045, 0 } }, + { "IJ", { 306, 0 } }, + { "Ё", { 1025, 0 } }, + { "Í", { 205, 0 } }, + { "Î", { 206, 0 } }, + { "И", { 1048, 0 } }, + { "İ", { 304, 0 } }, + { "ℑ", { 8465, 0 } }, + { "Ì", { 204, 0 } }, + { "ℑ", { 8465, 0 } }, + { "Ī", { 298, 0 } }, + { "ⅈ", { 8520, 0 } }, + { "⇒", { 8658, 0 } }, + { "∬", { 8748, 0 } }, + { "∫", { 8747, 0 } }, + { "⋂", { 8898, 0 } }, + { "⁣", { 8291, 0 } }, + { "⁢", { 8290, 0 } }, + { "Į", { 302, 0 } }, + { "𝕀", { 120128, 0 } }, + { "Ι", { 921, 0 } }, + { "ℐ", { 8464, 0 } }, + { "Ĩ", { 296, 0 } }, + { "І", { 1030, 0 } }, + { "Ï", { 207, 0 } }, + { "Ĵ", { 308, 0 } }, + { "Й", { 1049, 0 } }, + { "𝔍", { 120077, 0 } }, + { "𝕁", { 120129, 0 } }, + { "𝒥", { 119973, 0 } }, + { "Ј", { 1032, 0 } }, + { "Є", { 1028, 0 } }, + { "Х", { 1061, 0 } }, + { "Ќ", { 1036, 0 } }, + { "Κ", { 922, 0 } }, + { "Ķ", { 310, 0 } }, + { "К", { 1050, 0 } }, + { "𝔎", { 120078, 0 } }, + { "𝕂", { 120130, 0 } }, + { "𝒦", { 119974, 0 } }, + { "Љ", { 1033, 0 } }, + { "<", { 60, 0 } }, + { "Ĺ", { 313, 0 } }, + { "Λ", { 923, 0 } }, + { "⟪", { 10218, 0 } }, + { "ℒ", { 8466, 0 } }, + { "↞", { 8606, 0 } }, + { "Ľ", { 317, 0 } }, + { "Ļ", { 315, 0 } }, + { "Л", { 1051, 0 } }, + { "⟨", { 10216, 0 } }, + { "←", { 8592, 0 } }, + { "⇤", { 8676, 0 } }, + { "⇆", { 8646, 0 } }, + { "⌈", { 8968, 0 } }, + { "⟦", { 10214, 0 } }, + { "⥡", { 10593, 0 } }, + { "⇃", { 8643, 0 } }, + { "⥙", { 10585, 0 } }, + { "⌊", { 8970, 0 } }, + { "↔", { 8596, 0 } }, + { "⥎", { 10574, 0 } }, + { "⊣", { 8867, 0 } }, + { "↤", { 8612, 0 } }, + { "⥚", { 10586, 0 } }, + { "⊲", { 8882, 0 } }, + { "⧏", { 10703, 0 } }, + { "⊴", { 8884, 0 } }, + { "⥑", { 10577, 0 } }, + { "⥠", { 10592, 0 } }, + { "↿", { 8639, 0 } }, + { "⥘", { 10584, 0 } }, + { "↼", { 8636, 0 } }, + { "⥒", { 10578, 0 } }, + { "⇐", { 8656, 0 } }, + { "⇔", { 8660, 0 } }, + { "⋚", { 8922, 0 } }, + { "≦", { 8806, 0 } }, + { "≶", { 8822, 0 } }, + { "⪡", { 10913, 0 } }, + { "⩽", { 10877, 0 } }, + { "≲", { 8818, 0 } }, + { "𝔏", { 120079, 0 } }, + { "⋘", { 8920, 0 } }, + { "⇚", { 8666, 0 } }, + { "Ŀ", { 319, 0 } }, + { "⟵", { 10229, 0 } }, + { "⟷", { 10231, 0 } }, + { "⟶", { 10230, 0 } }, + { "⟸", { 10232, 0 } }, + { "⟺", { 10234, 0 } }, + { "⟹", { 10233, 0 } }, + { "𝕃", { 120131, 0 } }, + { "↙", { 8601, 0 } }, + { "↘", { 8600, 0 } }, + { "ℒ", { 8466, 0 } }, + { "↰", { 8624, 0 } }, + { "Ł", { 321, 0 } }, + { "≪", { 8810, 0 } }, + { "⤅", { 10501, 0 } }, + { "М", { 1052, 0 } }, + { " ", { 8287, 0 } }, + { "ℳ", { 8499, 0 } }, + { "𝔐", { 120080, 0 } }, + { "∓", { 8723, 0 } }, + { "𝕄", { 120132, 0 } }, + { "ℳ", { 8499, 0 } }, + { "Μ", { 924, 0 } }, + { "Њ", { 1034, 0 } }, + { "Ń", { 323, 0 } }, + { "Ň", { 327, 0 } }, + { "Ņ", { 325, 0 } }, + { "Н", { 1053, 0 } }, + { "​", { 8203, 0 } }, + { "​", { 8203, 0 } }, + { "​", { 8203, 0 } }, + { "​", { 8203, 0 } }, + { "≫", { 8811, 0 } }, + { "≪", { 8810, 0 } }, + { " ", { 10, 0 } }, + { "𝔑", { 120081, 0 } }, + { "⁠", { 8288, 0 } }, + { " ", { 160, 0 } }, + { "ℕ", { 8469, 0 } }, + { "⫬", { 10988, 0 } }, + { "≢", { 8802, 0 } }, + { "≭", { 8813, 0 } }, + { "∦", { 8742, 0 } }, + { "∉", { 8713, 0 } }, + { "≠", { 8800, 0 } }, + { "≂̸", { 8770, 824 } }, + { "∄", { 8708, 0 } }, + { "≯", { 8815, 0 } }, + { "≱", { 8817, 0 } }, + { "≧̸", { 8807, 824 } }, + { "≫̸", { 8811, 824 } }, + { "≹", { 8825, 0 } }, + { "⩾̸", { 10878, 824 } }, + { "≵", { 8821, 0 } }, + { "≎̸", { 8782, 824 } }, + { "≏̸", { 8783, 824 } }, + { "⋪", { 8938, 0 } }, + { "⧏̸", { 10703, 824 } }, + { "⋬", { 8940, 0 } }, + { "≮", { 8814, 0 } }, + { "≰", { 8816, 0 } }, + { "≸", { 8824, 0 } }, + { "≪̸", { 8810, 824 } }, + { "⩽̸", { 10877, 824 } }, + { "≴", { 8820, 0 } }, + { "⪢̸", { 10914, 824 } }, + { "⪡̸", { 10913, 824 } }, + { "⊀", { 8832, 0 } }, + { "⪯̸", { 10927, 824 } }, + { "⋠", { 8928, 0 } }, + { "∌", { 8716, 0 } }, + { "⋫", { 8939, 0 } }, + { "⧐̸", { 10704, 824 } }, + { "⋭", { 8941, 0 } }, + { "⊏̸", { 8847, 824 } }, + { "⋢", { 8930, 0 } }, + { "⊐̸", { 8848, 824 } }, + { "⋣", { 8931, 0 } }, + { "⊂⃒", { 8834, 8402 } }, + { "⊈", { 8840, 0 } }, + { "⊁", { 8833, 0 } }, + { "⪰̸", { 10928, 824 } }, + { "⋡", { 8929, 0 } }, + { "≿̸", { 8831, 824 } }, + { "⊃⃒", { 8835, 8402 } }, + { "⊉", { 8841, 0 } }, + { "≁", { 8769, 0 } }, + { "≄", { 8772, 0 } }, + { "≇", { 8775, 0 } }, + { "≉", { 8777, 0 } }, + { "∤", { 8740, 0 } }, + { "𝒩", { 119977, 0 } }, + { "Ñ", { 209, 0 } }, + { "Ν", { 925, 0 } }, + { "Œ", { 338, 0 } }, + { "Ó", { 211, 0 } }, + { "Ô", { 212, 0 } }, + { "О", { 1054, 0 } }, + { "Ő", { 336, 0 } }, + { "𝔒", { 120082, 0 } }, + { "Ò", { 210, 0 } }, + { "Ō", { 332, 0 } }, + { "Ω", { 937, 0 } }, + { "Ο", { 927, 0 } }, + { "𝕆", { 120134, 0 } }, + { "“", { 8220, 0 } }, + { "‘", { 8216, 0 } }, + { "⩔", { 10836, 0 } }, + { "𝒪", { 119978, 0 } }, + { "Ø", { 216, 0 } }, + { "Õ", { 213, 0 } }, + { "⨷", { 10807, 0 } }, + { "Ö", { 214, 0 } }, + { "‾", { 8254, 0 } }, + { "⏞", { 9182, 0 } }, + { "⎴", { 9140, 0 } }, + { "⏜", { 9180, 0 } }, + { "∂", { 8706, 0 } }, + { "П", { 1055, 0 } }, + { "𝔓", { 120083, 0 } }, + { "Φ", { 934, 0 } }, + { "Π", { 928, 0 } }, + { "±", { 177, 0 } }, + { "ℌ", { 8460, 0 } }, + { "ℙ", { 8473, 0 } }, + { "⪻", { 10939, 0 } }, + { "≺", { 8826, 0 } }, + { "⪯", { 10927, 0 } }, + { "≼", { 8828, 0 } }, + { "≾", { 8830, 0 } }, + { "″", { 8243, 0 } }, + { "∏", { 8719, 0 } }, + { "∷", { 8759, 0 } }, + { "∝", { 8733, 0 } }, + { "𝒫", { 119979, 0 } }, + { "Ψ", { 936, 0 } }, + { """, { 34, 0 } }, + { "𝔔", { 120084, 0 } }, + { "ℚ", { 8474, 0 } }, + { "𝒬", { 119980, 0 } }, + { "⤐", { 10512, 0 } }, + { "®", { 174, 0 } }, + { "Ŕ", { 340, 0 } }, + { "⟫", { 10219, 0 } }, + { "↠", { 8608, 0 } }, + { "⤖", { 10518, 0 } }, + { "Ř", { 344, 0 } }, + { "Ŗ", { 342, 0 } }, + { "Р", { 1056, 0 } }, + { "ℜ", { 8476, 0 } }, + { "∋", { 8715, 0 } }, + { "⇋", { 8651, 0 } }, + { "⥯", { 10607, 0 } }, + { "ℜ", { 8476, 0 } }, + { "Ρ", { 929, 0 } }, + { "⟩", { 10217, 0 } }, + { "→", { 8594, 0 } }, + { "⇥", { 8677, 0 } }, + { "⇄", { 8644, 0 } }, + { "⌉", { 8969, 0 } }, + { "⟧", { 10215, 0 } }, + { "⥝", { 10589, 0 } }, + { "⇂", { 8642, 0 } }, + { "⥕", { 10581, 0 } }, + { "⌋", { 8971, 0 } }, + { "⊢", { 8866, 0 } }, + { "↦", { 8614, 0 } }, + { "⥛", { 10587, 0 } }, + { "⊳", { 8883, 0 } }, + { "⧐", { 10704, 0 } }, + { "⊵", { 8885, 0 } }, + { "⥏", { 10575, 0 } }, + { "⥜", { 10588, 0 } }, + { "↾", { 8638, 0 } }, + { "⥔", { 10580, 0 } }, + { "⇀", { 8640, 0 } }, + { "⥓", { 10579, 0 } }, + { "⇒", { 8658, 0 } }, + { "ℝ", { 8477, 0 } }, + { "⥰", { 10608, 0 } }, + { "⇛", { 8667, 0 } }, + { "ℛ", { 8475, 0 } }, + { "↱", { 8625, 0 } }, + { "⧴", { 10740, 0 } }, + { "Щ", { 1065, 0 } }, + { "Ш", { 1064, 0 } }, + { "Ь", { 1068, 0 } }, + { "Ś", { 346, 0 } }, + { "⪼", { 10940, 0 } }, + { "Š", { 352, 0 } }, + { "Ş", { 350, 0 } }, + { "Ŝ", { 348, 0 } }, + { "С", { 1057, 0 } }, + { "𝔖", { 120086, 0 } }, + { "↓", { 8595, 0 } }, + { "←", { 8592, 0 } }, + { "→", { 8594, 0 } }, + { "↑", { 8593, 0 } }, + { "Σ", { 931, 0 } }, + { "∘", { 8728, 0 } }, + { "𝕊", { 120138, 0 } }, + { "√", { 8730, 0 } }, + { "□", { 9633, 0 } }, + { "⊓", { 8851, 0 } }, + { "⊏", { 8847, 0 } }, + { "⊑", { 8849, 0 } }, + { "⊐", { 8848, 0 } }, + { "⊒", { 8850, 0 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10993, 0 } }, + { "𝕥", { 120165, 0 } }, + { "⫚", { 10970, 0 } }, + { "⤩", { 10537, 0 } }, + { "‴", { 8244, 0 } }, + { "™", { 8482, 0 } }, + { "▵", { 9653, 0 } }, + { "▿", { 9663, 0 } }, + { "◃", { 9667, 0 } }, + { "⊴", { 8884, 0 } }, + { "≜", { 8796, 0 } }, + { "▹", { 9657, 0 } }, + { "⊵", { 8885, 0 } }, + { "◬", { 9708, 0 } }, + { "≜", { 8796, 0 } }, + { "⨺", { 10810, 0 } }, + { "⨹", { 10809, 0 } }, + { "⧍", { 10701, 0 } }, + { "⨻", { 10811, 0 } }, + { "⏢", { 9186, 0 } }, + { "𝓉", { 120009, 0 } }, + { "ц", { 1094, 0 } }, + { "ћ", { 1115, 0 } }, + { "ŧ", { 359, 0 } }, + { "≬", { 8812, 0 } }, + { "↞", { 8606, 0 } }, + { "↠", { 8608, 0 } }, + { "⇑", { 8657, 0 } }, + { "⥣", { 10595, 0 } }, + { "ú", { 250, 0 } }, + { "↑", { 8593, 0 } }, + { "ў", { 1118, 0 } }, + { "ŭ", { 365, 0 } }, + { "û", { 251, 0 } }, + { "у", { 1091, 0 } }, + { "⇅", { 8645, 0 } }, + { "ű", { 369, 0 } }, + { "⥮", { 10606, 0 } }, + { "⥾", { 10622, 0 } }, + { "𝔲", { 120114, 0 } }, + { "ù", { 249, 0 } }, + { "↿", { 8639, 0 } }, + { "↾", { 8638, 0 } }, + { "▀", { 9600, 0 } }, + { "⌜", { 8988, 0 } }, + { "⌜", { 8988, 0 } }, + { "⌏", { 8975, 0 } }, + { "◸", { 9720, 0 } }, + { "ū", { 363, 0 } }, + { "¨", { 168, 0 } }, + { "ų", { 371, 0 } }, + { "𝕦", { 120166, 0 } }, + { "↑", { 8593, 0 } }, + { "↕", { 8597, 0 } }, + { "↿", { 8639, 0 } }, + { "↾", { 8638, 0 } }, + { "⊎", { 8846, 0 } }, + { "υ", { 965, 0 } }, + { "ϒ", { 978, 0 } }, + { "υ", { 965, 0 } }, + { "⇈", { 8648, 0 } }, + { "⌝", { 8989, 0 } }, + { "⌝", { 8989, 0 } }, + { "⌎", { 8974, 0 } }, + { "ů", { 367, 0 } }, + { "◹", { 9721, 0 } }, + { "𝓊", { 120010, 0 } }, + { "⋰", { 8944, 0 } }, + { "ũ", { 361, 0 } }, + { "▵", { 9653, 0 } }, + { "▴", { 9652, 0 } }, + { "⇈", { 8648, 0 } }, + { "ü", { 252, 0 } }, + { "⦧", { 10663, 0 } }, + { "⇕", { 8661, 0 } }, + { "⫨", { 10984, 0 } }, + { "⫩", { 10985, 0 } }, + { "⊨", { 8872, 0 } }, + { "⦜", { 10652, 0 } }, + { "ϵ", { 1013, 0 } }, + { "ϰ", { 1008, 0 } }, + { "∅", { 8709, 0 } }, + { "ϕ", { 981, 0 } }, + { "ϖ", { 982, 0 } }, + { "∝", { 8733, 0 } }, + { "↕", { 8597, 0 } }, + { "ϱ", { 1009, 0 } }, + { "ς", { 962, 0 } }, + { "⊊︀", { 8842, 65024 } }, + { "⫋︀", { 10955, 65024 } }, + { "⊋︀", { 8843, 65024 } }, + { "⫌︀", { 10956, 65024 } }, + { "ϑ", { 977, 0 } }, + { "⊲", { 8882, 0 } }, + { "⊳", { 8883, 0 } }, + { "в", { 1074, 0 } }, + { "⊢", { 8866, 0 } }, + { "∨", { 8744, 0 } }, + { "⊻", { 8891, 0 } }, + { "≚", { 8794, 0 } }, + { "⋮", { 8942, 0 } }, + { "|", { 124, 0 } }, + { "|", { 124, 0 } }, + { "𝔳", { 120115, 0 } }, + { "⊲", { 8882, 0 } }, + { "⊂⃒", { 8834, 8402 } }, + { "⊃⃒", { 8835, 8402 } }, + { "𝕧", { 120167, 0 } }, + { "∝", { 8733, 0 } }, + { "⊳", { 8883, 0 } }, + { "𝓋", { 120011, 0 } }, + { "⫋︀", { 10955, 65024 } }, + { "⊊︀", { 8842, 65024 } }, + { "⫌︀", { 10956, 65024 } }, + { "⊋︀", { 8843, 65024 } }, + { "⦚", { 10650, 0 } }, + { "ŵ", { 373, 0 } }, + { "⩟", { 10847, 0 } }, + { "∧", { 8743, 0 } }, + { "≙", { 8793, 0 } }, + { "℘", { 8472, 0 } }, + { "𝔴", { 120116, 0 } }, + { "𝕨", { 120168, 0 } }, + { "℘", { 8472, 0 } }, + { "≀", { 8768, 0 } }, + { "≀", { 8768, 0 } }, + { "𝓌", { 120012, 0 } }, + { "⋂", { 8898, 0 } }, + { "◯", { 9711, 0 } }, + { "⋃", { 8899, 0 } }, + { "▽", { 9661, 0 } }, + { "𝔵", { 120117, 0 } }, + { "⟺", { 10234, 0 } }, + { "⟷", { 10231, 0 } }, + { "ξ", { 958, 0 } }, + { "⟸", { 10232, 0 } }, + { "⟵", { 10229, 0 } }, + { "⟼", { 10236, 0 } }, + { "⋻", { 8955, 0 } }, + { "⨀", { 10752, 0 } }, + { "𝕩", { 120169, 0 } }, + { "⨁", { 10753, 0 } }, + { "⨂", { 10754, 0 } }, + { "⟹", { 10233, 0 } }, + { "⟶", { 10230, 0 } }, + { "𝓍", { 120013, 0 } }, + { "⨆", { 10758, 0 } }, + { "⨄", { 10756, 0 } }, + { "△", { 9651, 0 } }, + { "⋁", { 8897, 0 } }, + { "⋀", { 8896, 0 } }, + { "ý", { 253, 0 } }, + { "я", { 1103, 0 } }, + { "ŷ", { 375, 0 } }, + { "ы", { 1099, 0 } }, + { "¥", { 165, 0 } }, + { "𝔶", { 120118, 0 } }, + { "ї", { 1111, 0 } }, + { "𝕪", { 120170, 0 } }, + { "𝓎", { 120014, 0 } }, + { "ю", { 1102, 0 } }, + { "ÿ", { 255, 0 } }, + { "ź", { 378, 0 } }, + { "ž", { 382, 0 } }, + { "з", { 1079, 0 } }, + { "ż", { 380, 0 } }, + { "ℨ", { 8488, 0 } }, + { "ζ", { 950, 0 } }, + { "𝔷", { 120119, 0 } }, + { "ж", { 1078, 0 } }, + { "⇝", { 8669, 0 } }, + { "𝕫", { 120171, 0 } }, + { "𝓏", { 120015, 0 } }, + { "‍", { 8205, 0 } }, + { "‌", { 8204, 0 } } +}; + + +struct entity_key { + const char* name; + size_t name_size; +}; + +static int +entity_cmp(const void* p_key, const void* p_entity) +{ + struct entity_key* key = (struct entity_key*) p_key; + struct entity* ent = (struct entity*) p_entity; + + return strncmp(key->name, ent->name, key->name_size); +} + +const struct entity* +entity_lookup(const char* name, size_t name_size) +{ + struct entity_key key = { name, name_size }; + + return bsearch(&key, + entity_table, + sizeof(entity_table) / sizeof(entity_table[0]), + sizeof(struct entity), + entity_cmp); +} diff --git a/src/markdown/entity.h b/src/markdown/entity.h new file mode 100644 index 0000000..36395fe --- /dev/null +++ b/src/markdown/entity.h @@ -0,0 +1,42 @@ +/* + * MD4C: Markdown parser for C + * (http://github.com/mity/md4c) + * + * Copyright (c) 2016-2019 Martin Mitas + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef MD4C_ENTITY_H +#define MD4C_ENTITY_H + +#include + + +/* Most entities are formed by single Unicode codepoint, few by two codepoints. + * Single-codepoint entities have codepoints[1] set to zero. */ +struct entity { + const char* name; + unsigned codepoints[2]; +}; + +const struct entity* entity_lookup(const char* name, size_t name_size); + + +#endif /* MD4C_ENTITY_H */ diff --git a/src/markdown/md4c-html.c b/src/markdown/md4c-html.c new file mode 100644 index 0000000..d604aec --- /dev/null +++ b/src/markdown/md4c-html.c @@ -0,0 +1,573 @@ +/* + * MD4C: Markdown parser for C + * (http://github.com/mity/md4c) + * + * Copyright (c) 2016-2019 Martin Mitas + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include +#include + +#include "md4c-html.h" +#include "entity.h" + + +#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199409L + /* C89/90 or old compilers in general may not understand "inline". */ + #if defined __GNUC__ + #define inline __inline__ + #elif defined _MSC_VER + #define inline __inline + #else + #define inline + #endif +#endif + +#ifdef _WIN32 + #define snprintf _snprintf +#endif + + + +typedef struct MD_HTML_tag MD_HTML; +struct MD_HTML_tag { + void (*process_output)(const MD_CHAR*, MD_SIZE, void*); + void* userdata; + unsigned flags; + int image_nesting_level; + char escape_map[256]; +}; + +#define NEED_HTML_ESC_FLAG 0x1 +#define NEED_URL_ESC_FLAG 0x2 + + +/***************************************** + *** HTML rendering helper functions *** + *****************************************/ + +#define ISDIGIT(ch) ('0' <= (ch) && (ch) <= '9') +#define ISLOWER(ch) ('a' <= (ch) && (ch) <= 'z') +#define ISUPPER(ch) ('A' <= (ch) && (ch) <= 'Z') +#define ISALNUM(ch) (ISLOWER(ch) || ISUPPER(ch) || ISDIGIT(ch)) + + +static inline void +render_verbatim(MD_HTML* r, const MD_CHAR* text, MD_SIZE size) +{ + r->process_output(text, size, r->userdata); +} + +/* Keep this as a macro. Most compiler should then be smart enough to replace + * the strlen() call with a compile-time constant if the string is a C literal. */ +#define RENDER_VERBATIM(r, verbatim) \ + render_verbatim((r), (verbatim), (MD_SIZE) (strlen(verbatim))) + + +static void +render_html_escaped(MD_HTML* r, const MD_CHAR* data, MD_SIZE size) +{ + MD_OFFSET beg = 0; + MD_OFFSET off = 0; + + /* Some characters need to be escaped in normal HTML text. */ + #define NEED_HTML_ESC(ch) (r->escape_map[(unsigned char)(ch)] & NEED_HTML_ESC_FLAG) + + while(1) { + /* Optimization: Use some loop unrolling. */ + while(off + 3 < size && !NEED_HTML_ESC(data[off+0]) && !NEED_HTML_ESC(data[off+1]) + && !NEED_HTML_ESC(data[off+2]) && !NEED_HTML_ESC(data[off+3])) + off += 4; + while(off < size && !NEED_HTML_ESC(data[off])) + off++; + + if(off > beg) + render_verbatim(r, data + beg, off - beg); + + if(off < size) { + switch(data[off]) { + case '&': RENDER_VERBATIM(r, "&"); break; + case '<': RENDER_VERBATIM(r, "<"); break; + case '>': RENDER_VERBATIM(r, ">"); break; + case '"': RENDER_VERBATIM(r, """); break; + } + off++; + } else { + break; + } + beg = off; + } +} + +static void +render_url_escaped(MD_HTML* r, const MD_CHAR* data, MD_SIZE size) +{ + static const MD_CHAR hex_chars[] = "0123456789ABCDEF"; + MD_OFFSET beg = 0; + MD_OFFSET off = 0; + + /* Some characters need to be escaped in URL attributes. */ + #define NEED_URL_ESC(ch) (r->escape_map[(unsigned char)(ch)] & NEED_URL_ESC_FLAG) + + while(1) { + while(off < size && !NEED_URL_ESC(data[off])) + off++; + if(off > beg) + render_verbatim(r, data + beg, off - beg); + + if(off < size) { + char hex[3]; + + switch(data[off]) { + case '&': RENDER_VERBATIM(r, "&"); break; + default: + hex[0] = '%'; + hex[1] = hex_chars[((unsigned)data[off] >> 4) & 0xf]; + hex[2] = hex_chars[((unsigned)data[off] >> 0) & 0xf]; + render_verbatim(r, hex, 3); + break; + } + off++; + } else { + break; + } + + beg = off; + } +} + +static unsigned +hex_val(char ch) +{ + if('0' <= ch && ch <= '9') + return ch - '0'; + if('A' <= ch && ch <= 'Z') + return ch - 'A' + 10; + else + return ch - 'a' + 10; +} + +static void +render_utf8_codepoint(MD_HTML* r, unsigned codepoint, + void (*fn_append)(MD_HTML*, const MD_CHAR*, MD_SIZE)) +{ + static const MD_CHAR utf8_replacement_char[] = { 0xef, 0xbf, 0xbd }; + + unsigned char utf8[4]; + size_t n; + + if(codepoint <= 0x7f) { + n = 1; + utf8[0] = codepoint; + } else if(codepoint <= 0x7ff) { + n = 2; + utf8[0] = 0xc0 | ((codepoint >> 6) & 0x1f); + utf8[1] = 0x80 + ((codepoint >> 0) & 0x3f); + } else if(codepoint <= 0xffff) { + n = 3; + utf8[0] = 0xe0 | ((codepoint >> 12) & 0xf); + utf8[1] = 0x80 + ((codepoint >> 6) & 0x3f); + utf8[2] = 0x80 + ((codepoint >> 0) & 0x3f); + } else { + n = 4; + utf8[0] = 0xf0 | ((codepoint >> 18) & 0x7); + utf8[1] = 0x80 + ((codepoint >> 12) & 0x3f); + utf8[2] = 0x80 + ((codepoint >> 6) & 0x3f); + utf8[3] = 0x80 + ((codepoint >> 0) & 0x3f); + } + + if(0 < codepoint && codepoint <= 0x10ffff) + fn_append(r, (char*)utf8, (MD_SIZE)n); + else + fn_append(r, utf8_replacement_char, 3); +} + +/* Translate entity to its UTF-8 equivalent, or output the verbatim one + * if such entity is unknown (or if the translation is disabled). */ +static void +render_entity(MD_HTML* r, const MD_CHAR* text, MD_SIZE size, + void (*fn_append)(MD_HTML*, const MD_CHAR*, MD_SIZE)) +{ + if(r->flags & MD_HTML_FLAG_VERBATIM_ENTITIES) { + render_verbatim(r, text, size); + return; + } + + /* We assume UTF-8 output is what is desired. */ + if(size > 3 && text[1] == '#') { + unsigned codepoint = 0; + + if(text[2] == 'x' || text[2] == 'X') { + /* Hexadecimal entity (e.g. "�")). */ + MD_SIZE i; + for(i = 3; i < size-1; i++) + codepoint = 16 * codepoint + hex_val(text[i]); + } else { + /* Decimal entity (e.g. "&1234;") */ + MD_SIZE i; + for(i = 2; i < size-1; i++) + codepoint = 10 * codepoint + (text[i] - '0'); + } + + render_utf8_codepoint(r, codepoint, fn_append); + return; + } else { + /* Named entity (e.g. " "). */ + const struct entity* ent; + + ent = entity_lookup(text, size); + if(ent != NULL) { + render_utf8_codepoint(r, ent->codepoints[0], fn_append); + if(ent->codepoints[1]) + render_utf8_codepoint(r, ent->codepoints[1], fn_append); + return; + } + } + + fn_append(r, text, size); +} + +static void +render_attribute(MD_HTML* r, const MD_ATTRIBUTE* attr, + void (*fn_append)(MD_HTML*, const MD_CHAR*, MD_SIZE)) +{ + int i; + + for(i = 0; attr->substr_offsets[i] < attr->size; i++) { + MD_TEXTTYPE type = attr->substr_types[i]; + MD_OFFSET off = attr->substr_offsets[i]; + MD_SIZE size = attr->substr_offsets[i+1] - off; + const MD_CHAR* text = attr->text + off; + + switch(type) { + case MD_TEXT_NULLCHAR: render_utf8_codepoint(r, 0x0000, render_verbatim); break; + case MD_TEXT_ENTITY: render_entity(r, text, size, fn_append); break; + default: fn_append(r, text, size); break; + } + } +} + + +static void +render_open_ol_block(MD_HTML* r, const MD_BLOCK_OL_DETAIL* det) +{ + char buf[64]; + + if(det->start == 1) { + RENDER_VERBATIM(r, "
    \n"); + return; + } + + snprintf(buf, sizeof(buf), "
      \n", det->start); + RENDER_VERBATIM(r, buf); +} + +static void +render_open_li_block(MD_HTML* r, const MD_BLOCK_LI_DETAIL* det) +{ + if(det->is_task) { + RENDER_VERBATIM(r, "
    1. " + "task_mark == 'x' || det->task_mark == 'X') + RENDER_VERBATIM(r, " checked"); + RENDER_VERBATIM(r, ">"); + } else { + RENDER_VERBATIM(r, "
    2. "); + } +} + +static void +render_open_code_block(MD_HTML* r, const MD_BLOCK_CODE_DETAIL* det) +{ + RENDER_VERBATIM(r, "
      lang.text != NULL) {
+        RENDER_VERBATIM(r, " class=\"language-");
+        render_attribute(r, &det->lang, render_html_escaped);
+        RENDER_VERBATIM(r, "\"");
+    }
+
+    RENDER_VERBATIM(r, ">");
+}
+
+static void
+render_open_td_block(MD_HTML* r, const MD_CHAR* cell_type, const MD_BLOCK_TD_DETAIL* det)
+{
+    RENDER_VERBATIM(r, "<");
+    RENDER_VERBATIM(r, cell_type);
+
+    switch(det->align) {
+        case MD_ALIGN_LEFT:     RENDER_VERBATIM(r, " align=\"left\">"); break;
+        case MD_ALIGN_CENTER:   RENDER_VERBATIM(r, " align=\"center\">"); break;
+        case MD_ALIGN_RIGHT:    RENDER_VERBATIM(r, " align=\"right\">"); break;
+        default:                RENDER_VERBATIM(r, ">"); break;
+    }
+}
+
+static void
+render_open_a_span(MD_HTML* r, const MD_SPAN_A_DETAIL* det)
+{
+    RENDER_VERBATIM(r, "href, render_url_escaped);
+
+    if(det->title.text != NULL) {
+        RENDER_VERBATIM(r, "\" title=\"");
+        render_attribute(r, &det->title, render_html_escaped);
+    }
+
+    RENDER_VERBATIM(r, "\">");
+}
+
+static void
+render_open_img_span(MD_HTML* r, const MD_SPAN_IMG_DETAIL* det)
+{
+    RENDER_VERBATIM(r, "src, render_url_escaped);
+
+    RENDER_VERBATIM(r, "\" alt=\"");
+
+    r->image_nesting_level++;
+}
+
+static void
+render_close_img_span(MD_HTML* r, const MD_SPAN_IMG_DETAIL* det)
+{
+    if(det->title.text != NULL) {
+        RENDER_VERBATIM(r, "\" title=\"");
+        render_attribute(r, &det->title, render_html_escaped);
+    }
+
+    RENDER_VERBATIM(r, (r->flags & MD_HTML_FLAG_XHTML) ? "\" />" : "\">");
+
+    r->image_nesting_level--;
+}
+
+static void
+render_open_wikilink_span(MD_HTML* r, const MD_SPAN_WIKILINK_DETAIL* det)
+{
+    RENDER_VERBATIM(r, "target, render_html_escaped);
+
+    RENDER_VERBATIM(r, "\">");
+}
+
+
+/**************************************
+ ***  HTML renderer implementation  ***
+ **************************************/
+
+static int
+enter_block_callback(MD_BLOCKTYPE type, void* detail, void* userdata)
+{
+    static const MD_CHAR* head[6] = { "
      ", "
      ", "
      ", "
      ", "
      ", "
      " };
+    MD_HTML* r = (MD_HTML*) userdata;
+
+    switch(type) {
+        case MD_BLOCK_DOC:      /* noop */ break;
+        case MD_BLOCK_QUOTE:    RENDER_VERBATIM(r, "
      \n"); break;
+        case MD_BLOCK_UL:       RENDER_VERBATIM(r, "
        \n"); break;
+        case MD_BLOCK_OL:       render_open_ol_block(r, (const MD_BLOCK_OL_DETAIL*)detail); break;
+        case MD_BLOCK_LI:       render_open_li_block(r, (const MD_BLOCK_LI_DETAIL*)detail); break;
+        case MD_BLOCK_HR:       RENDER_VERBATIM(r, (r->flags & MD_HTML_FLAG_XHTML) ? "
        \n" : "
        \n"); break;
+        case MD_BLOCK_H:        RENDER_VERBATIM(r, head[((MD_BLOCK_H_DETAIL*)detail)->level - 1]); break;
+        case MD_BLOCK_CODE:     render_open_code_block(r, (const MD_BLOCK_CODE_DETAIL*) detail); break;
+        case MD_BLOCK_HTML:     /* noop */ break;
+        case MD_BLOCK_P:        RENDER_VERBATIM(r, "
        "); break;
+        case MD_BLOCK_TABLE:    RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_THEAD:    RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_TBODY:    RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_TR:       RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_TH:       render_open_td_block(r, "th", (MD_BLOCK_TD_DETAIL*)detail); break;
+        case MD_BLOCK_TD:       render_open_td_block(r, "td", (MD_BLOCK_TD_DETAIL*)detail); break;
+    }
+
+    return 0;
+}
+
+static int
+leave_block_callback(MD_BLOCKTYPE type, void* detail, void* userdata)
+{
+    static const MD_CHAR* head[6] = { "\n", "\n", "\n", "\n", "\n", "\n" };
+    MD_HTML* r = (MD_HTML*) userdata;
+
+    switch(type) {
+        case MD_BLOCK_DOC:      /*noop*/ break;
+        case MD_BLOCK_QUOTE:    RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_UL:       RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_OL:       RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_LI:       RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_HR:       /*noop*/ break;
+        case MD_BLOCK_H:        RENDER_VERBATIM(r, head[((MD_BLOCK_H_DETAIL*)detail)->level - 1]); break;
+        case MD_BLOCK_CODE:     RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_HTML:     /* noop */ break;
+        case MD_BLOCK_P:        RENDER_VERBATIM(r, "
        \n"); break;
+        case MD_BLOCK_TABLE:    RENDER_VERBATIM(r, "
        \n"); break;
+        case MD_BLOCK_THEAD:    RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_TBODY:    RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_TR:       RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_TH:       RENDER_VERBATIM(r, "\n"); break;
+        case MD_BLOCK_TD:       RENDER_VERBATIM(r, "\n"); break;
+    }
+
+    return 0;
+}
+
+static int
+enter_span_callback(MD_SPANTYPE type, void* detail, void* userdata)
+{
+    MD_HTML* r = (MD_HTML*) userdata;
+
+    if(r->image_nesting_level > 0) {
+        /* We are inside a Markdown image label. Markdown allows to use any
+         * emphasis and other rich contents in that context similarly as in
+         * any link label.
+         *
+         * However, unlike in the case of links (where that contents becomes
+         * contents of the         ... tag), in the case of images the contents
+         * is supposed to fall into the attribute alt: ....
+         *
+         * In that context we naturally cannot output nested HTML tags. So lets
+         * suppress them and only output the plain text (i.e. what falls into
+         * text() callback).
+         *
+         * This make-it-a-plain-text approach is the recommended practice by
+         * CommonMark specification (for HTML output).
+         */
+        return 0;
+    }
+
+    switch(type) {
+        case MD_SPAN_EM:                RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_STRONG:            RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_U:                 RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_A:                 render_open_a_span(r, (MD_SPAN_A_DETAIL*) detail); break;
+        case MD_SPAN_IMG:               render_open_img_span(r, (MD_SPAN_IMG_DETAIL*) detail); break;
+        case MD_SPAN_CODE:              RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_DEL:               RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_LATEXMATH:         RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_LATEXMATH_DISPLAY: RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_WIKILINK:          render_open_wikilink_span(r, (MD_SPAN_WIKILINK_DETAIL*) detail); break;
+    }
+
+    return 0;
+}
+
+static int
+leave_span_callback(MD_SPANTYPE type, void* detail, void* userdata)
+{
+    MD_HTML* r = (MD_HTML*) userdata;
+
+    if(r->image_nesting_level > 0) {
+        /* Ditto as in enter_span_callback(), except we have to allow the
+         * end of the  tag. */
+        if(r->image_nesting_level == 1  &&  type == MD_SPAN_IMG)
+            render_close_img_span(r, (MD_SPAN_IMG_DETAIL*) detail);
+        return 0;
+    }
+
+    switch(type) {
+        case MD_SPAN_EM:                RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_STRONG:            RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_U:                 RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_A:                 RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_IMG:               /*noop, handled above*/ break;
+        case MD_SPAN_CODE:              RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_DEL:               RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_LATEXMATH:         /*fall through*/
+        case MD_SPAN_LATEXMATH_DISPLAY: RENDER_VERBATIM(r, ""); break;
+        case MD_SPAN_WIKILINK:          RENDER_VERBATIM(r, ""); break;
+    }
+
+    return 0;
+}
+
+static int
+text_callback(MD_TEXTTYPE type, const MD_CHAR* text, MD_SIZE size, void* userdata)
+{
+    MD_HTML* r = (MD_HTML*) userdata;
+
+    switch(type) {
+        case MD_TEXT_NULLCHAR:  render_utf8_codepoint(r, 0x0000, render_verbatim); break;
+        case MD_TEXT_BR:        RENDER_VERBATIM(r, (r->image_nesting_level == 0
+                                        ? ((r->flags & MD_HTML_FLAG_XHTML) ? "
        \n" : "
        \n")
+                                        : " "));
+                                break;
+        case MD_TEXT_SOFTBR:    RENDER_VERBATIM(r, (r->image_nesting_level == 0 ? "\n" : " ")); break;
+        case MD_TEXT_HTML:      render_verbatim(r, text, size); break;
+        case MD_TEXT_ENTITY:    render_entity(r, text, size, render_html_escaped); break;
+        default:                render_html_escaped(r, text, size); break;
+    }
+
+    return 0;
+}
+
+static void
+debug_log_callback(const char* msg, void* userdata)
+{
+    MD_HTML* r = (MD_HTML*) userdata;
+    if(r->flags & MD_HTML_FLAG_DEBUG)
+        fprintf(stderr, "MD4C: %s\n", msg);
+}
+
+int
+md_html(const MD_CHAR* input, MD_SIZE input_size,
+        void (*process_output)(const MD_CHAR*, MD_SIZE, void*),
+        void* userdata, unsigned parser_flags, unsigned renderer_flags)
+{
+    MD_HTML render = { process_output, userdata, renderer_flags, 0, { 0 } };
+    int i;
+
+    MD_PARSER parser = {
+        0,
+        parser_flags,
+        enter_block_callback,
+        leave_block_callback,
+        enter_span_callback,
+        leave_span_callback,
+        text_callback,
+        debug_log_callback,
+        NULL
+    };
+
+    /* Build map of characters which need escaping. */
+    for(i = 0; i < 256; i++) {
+        unsigned char ch = (unsigned char) i;
+
+        if(strchr("\"&<>", ch) != NULL)
+            render.escape_map[i] |= NEED_HTML_ESC_FLAG;
+
+        if(!ISALNUM(ch)  &&  strchr("~-_.+!*(),%#@?=;:/,+$", ch) == NULL)
+            render.escape_map[i] |= NEED_URL_ESC_FLAG;
+    }
+
+    /* Consider skipping UTF-8 byte order mark (BOM). */
+    if(renderer_flags & MD_HTML_FLAG_SKIP_UTF8_BOM  &&  sizeof(MD_CHAR) == 1) {
+        static const MD_CHAR bom[3] = { 0xef, 0xbb, 0xbf };
+        if(input_size >= sizeof(bom)  &&  memcmp(input, bom, sizeof(bom)) == 0) {
+            input += sizeof(bom);
+            input_size -= sizeof(bom);
+        }
+    }
+
+    return md_parse(input, input_size, &parser, (void*) &render);
+}
+
diff --git a/src/markdown/md4c-html.h b/src/markdown/md4c-html.h
new file mode 100644
index 0000000..1042d29
--- /dev/null
+++ b/src/markdown/md4c-html.h
@@ -0,0 +1,68 @@
+/*
+ * MD4C: Markdown parser for C
+ * (http://github.com/mity/md4c)
+ *
+ * Copyright (c) 2016-2017 Martin Mitas
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef MD4C_HTML_H
+#define MD4C_HTML_H
+
+#include "md4c.h"
+
+#ifdef __cplusplus
+    extern "C" {
+#endif
+
+
+/* If set, debug output from md_parse() is sent to stderr. */
+#define MD_HTML_FLAG_DEBUG                  0x0001
+#define MD_HTML_FLAG_VERBATIM_ENTITIES      0x0002
+#define MD_HTML_FLAG_SKIP_UTF8_BOM          0x0004
+#define MD_HTML_FLAG_XHTML                  0x0008
+
+
+/* Render Markdown into HTML.
+ *
+ * Note only contents of  tag is generated. Caller must generate
+ * HTML header/footer manually before/after calling md_html().
+ *
+ * Params input and input_size specify the Markdown input.
+ * Callback process_output() gets called with chunks of HTML output.
+ * (Typical implementation may just output the bytes to a file or append to
+ * some buffer).
+ * Param userdata is just propgated back to process_output() callback.
+ * Param parser_flags are flags from md4c.h propagated to md_parse().
+ * Param render_flags is bitmask of MD_HTML_FLAG_xxxx.
+ *
+ * Returns -1 on error (if md_parse() fails.)
+ * Returns 0 on success.
+ */
+int md_html(const MD_CHAR* input, MD_SIZE input_size,
+            void (*process_output)(const MD_CHAR*, MD_SIZE, void*),
+            void* userdata, unsigned parser_flags, unsigned renderer_flags);
+
+
+#ifdef __cplusplus
+    }  /* extern "C" { */
+#endif
+
+#endif  /* MD4C_HTML_H */
diff --git a/src/markdown/md4c.c b/src/markdown/md4c.c
new file mode 100644
index 0000000..40066b2
--- /dev/null
+++ b/src/markdown/md4c.c
@@ -0,0 +1,6383 @@
+/*
+ * MD4C: Markdown parser for C
+ * (http://github.com/mity/md4c)
+ *
+ * Copyright (c) 2016-2020 Martin Mitas
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "md4c.h"
+
+#include 
+#include 
+#include 
+#include 
+
+
+/*****************************
+ ***  Miscellaneous Stuff  ***
+ *****************************/
+
+#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199409L
+    /* C89/90 or old compilers in general may not understand "inline". */
+    #if defined __GNUC__
+        #define inline __inline__
+    #elif defined _MSC_VER
+        #define inline __inline
+    #else
+        #define inline
+    #endif
+#endif
+
+/* Make the UTF-8 support the default. */
+#if !defined MD4C_USE_ASCII && !defined MD4C_USE_UTF8 && !defined MD4C_USE_UTF16
+    #define MD4C_USE_UTF8
+#endif
+
+/* Magic for making wide literals with MD4C_USE_UTF16. */
+#ifdef _T
+    #undef _T
+#endif
+#if defined MD4C_USE_UTF16
+    #define _T(x)           L##x
+#else
+    #define _T(x)           x
+#endif
+
+/* Misc. macros. */
+#define SIZEOF_ARRAY(a)     (sizeof(a) / sizeof(a[0]))
+
+#define STRINGIZE_(x)       #x
+#define STRINGIZE(x)        STRINGIZE_(x)
+
+#ifndef TRUE
+    #define TRUE            1
+    #define FALSE           0
+#endif
+
+#define MD_LOG(msg)                                                     \
+    do {                                                                \
+        if(ctx->parser.debug_log != NULL)                               \
+            ctx->parser.debug_log((msg), ctx->userdata);                \
+    } while(0)
+
+#ifdef DEBUG
+    #define MD_ASSERT(cond)                                             \
+            do {                                                        \
+                if(!(cond)) {                                           \
+                    MD_LOG(__FILE__ ":" STRINGIZE(__LINE__) ": "        \
+                           "Assertion '" STRINGIZE(cond) "' failed.");  \
+                    exit(1);                                            \
+                }                                                       \
+            } while(0)
+
+    #define MD_UNREACHABLE()        MD_ASSERT(1 == 0)
+#else
+    #ifdef __GNUC__
+        #define MD_ASSERT(cond)     do { if(!(cond)) __builtin_unreachable(); } while(0)
+        #define MD_UNREACHABLE()    do { __builtin_unreachable(); } while(0)
+    #elif defined _MSC_VER  &&  _MSC_VER > 120
+        #define MD_ASSERT(cond)     do { __assume(cond); } while(0)
+        #define MD_UNREACHABLE()    do { __assume(0); } while(0)
+    #else
+        #define MD_ASSERT(cond)     do {} while(0)
+        #define MD_UNREACHABLE()    do {} while(0)
+    #endif
+#endif
+
+/* For falling through case labels in switch statements. */
+#if defined __clang__ && __clang_major__ >= 12
+    #define MD_FALLTHROUGH()        __attribute__((fallthrough))
+#elif defined __GNUC__ && __GNUC__ >= 7
+    #define MD_FALLTHROUGH()        __attribute__((fallthrough))
+#else
+    #define MD_FALLTHROUGH()        ((void)0)
+#endif
+
+/* Suppress "unused parameter" warnings. */
+#define MD_UNUSED(x)                ((void)x)
+
+
+/************************
+ ***  Internal Types  ***
+ ************************/
+
+/* These are omnipresent so lets save some typing. */
+#define CHAR    MD_CHAR
+#define SZ      MD_SIZE
+#define OFF     MD_OFFSET
+
+typedef struct MD_MARK_tag MD_MARK;
+typedef struct MD_BLOCK_tag MD_BLOCK;
+typedef struct MD_CONTAINER_tag MD_CONTAINER;
+typedef struct MD_REF_DEF_tag MD_REF_DEF;
+
+
+/* During analyzes of inline marks, we need to manage some "mark chains",
+ * of (yet unresolved) openers. This structure holds start/end of the chain.
+ * The chain internals are then realized through MD_MARK::prev and ::next.
+ */
+typedef struct MD_MARKCHAIN_tag MD_MARKCHAIN;
+struct MD_MARKCHAIN_tag {
+    int head;   /* Index of first mark in the chain, or -1 if empty. */
+    int tail;   /* Index of last mark in the chain, or -1 if empty. */
+};
+
+/* Context propagated through all the parsing. */
+typedef struct MD_CTX_tag MD_CTX;
+struct MD_CTX_tag {
+    /* Immutable stuff (parameters of md_parse()). */
+    const CHAR* text;
+    SZ size;
+    MD_PARSER parser;
+    void* userdata;
+
+    /* When this is true, it allows some optimizations. */
+    int doc_ends_with_newline;
+
+    /* Helper temporary growing buffer. */
+    CHAR* buffer;
+    unsigned alloc_buffer;
+
+    /* Reference definitions. */
+    MD_REF_DEF* ref_defs;
+    int n_ref_defs;
+    int alloc_ref_defs;
+    void** ref_def_hashtable;
+    int ref_def_hashtable_size;
+
+    /* Stack of inline/span markers.
+     * This is only used for parsing a single block contents but by storing it
+     * here we may reuse the stack for subsequent blocks; i.e. we have fewer
+     * (re)allocations. */
+    MD_MARK* marks;
+    int n_marks;
+    int alloc_marks;
+
+#if defined MD4C_USE_UTF16
+    char mark_char_map[128];
+#else
+    char mark_char_map[256];
+#endif
+
+    /* For resolving of inline spans. */
+    MD_MARKCHAIN mark_chains[13];
+#define PTR_CHAIN                               (ctx->mark_chains[0])
+#define TABLECELLBOUNDARIES                     (ctx->mark_chains[1])
+#define ASTERISK_OPENERS_extraword_mod3_0       (ctx->mark_chains[2])
+#define ASTERISK_OPENERS_extraword_mod3_1       (ctx->mark_chains[3])
+#define ASTERISK_OPENERS_extraword_mod3_2       (ctx->mark_chains[4])
+#define ASTERISK_OPENERS_intraword_mod3_0       (ctx->mark_chains[5])
+#define ASTERISK_OPENERS_intraword_mod3_1       (ctx->mark_chains[6])
+#define ASTERISK_OPENERS_intraword_mod3_2       (ctx->mark_chains[7])
+#define UNDERSCORE_OPENERS                      (ctx->mark_chains[8])
+#define TILDE_OPENERS_1                         (ctx->mark_chains[9])
+#define TILDE_OPENERS_2                         (ctx->mark_chains[10])
+#define BRACKET_OPENERS                         (ctx->mark_chains[11])
+#define DOLLAR_OPENERS                          (ctx->mark_chains[12])
+#define OPENERS_CHAIN_FIRST                     2
+#define OPENERS_CHAIN_LAST                      12
+
+    int n_table_cell_boundaries;
+
+    /* For resolving links. */
+    int unresolved_link_head;
+    int unresolved_link_tail;
+
+    /* For resolving raw HTML. */
+    OFF html_comment_horizon;
+    OFF html_proc_instr_horizon;
+    OFF html_decl_horizon;
+    OFF html_cdata_horizon;
+
+    /* For block analysis.
+     * Notes:
+     *   -- It holds MD_BLOCK as well as MD_LINE structures. After each
+     *      MD_BLOCK, its (multiple) MD_LINE(s) follow.
+     *   -- For MD_BLOCK_HTML and MD_BLOCK_CODE, MD_VERBATIMLINE(s) are used
+     *      instead of MD_LINE(s).
+     */
+    void* block_bytes;
+    MD_BLOCK* current_block;
+    int n_block_bytes;
+    int alloc_block_bytes;
+
+    /* For container block analysis. */
+    MD_CONTAINER* containers;
+    int n_containers;
+    int alloc_containers;
+
+    /* Minimal indentation to call the block "indented code block". */
+    unsigned code_indent_offset;
+
+    /* Contextual info for line analysis. */
+    SZ code_fence_length;   /* For checking closing fence length. */
+    int html_block_type;    /* For checking closing raw HTML condition. */
+    int last_line_has_list_loosening_effect;
+    int last_list_item_starts_with_two_blank_lines;
+};
+
+enum MD_LINETYPE_tag {
+    MD_LINE_BLANK,
+    MD_LINE_HR,
+    MD_LINE_ATXHEADER,
+    MD_LINE_SETEXTHEADER,
+    MD_LINE_SETEXTUNDERLINE,
+    MD_LINE_INDENTEDCODE,
+    MD_LINE_FENCEDCODE,
+    MD_LINE_HTML,
+    MD_LINE_TEXT,
+    MD_LINE_TABLE,
+    MD_LINE_TABLEUNDERLINE
+};
+typedef enum MD_LINETYPE_tag MD_LINETYPE;
+
+typedef struct MD_LINE_ANALYSIS_tag MD_LINE_ANALYSIS;
+struct MD_LINE_ANALYSIS_tag {
+    MD_LINETYPE type    : 16;
+    unsigned data       : 16;
+    OFF beg;
+    OFF end;
+    unsigned indent;        /* Indentation level. */
+};
+
+typedef struct MD_LINE_tag MD_LINE;
+struct MD_LINE_tag {
+    OFF beg;
+    OFF end;
+};
+
+typedef struct MD_VERBATIMLINE_tag MD_VERBATIMLINE;
+struct MD_VERBATIMLINE_tag {
+    OFF beg;
+    OFF end;
+    OFF indent;
+};
+
+
+/*****************
+ ***  Helpers  ***
+ *****************/
+
+/* Character accessors. */
+#define CH(off)                 (ctx->text[(off)])
+#define STR(off)                (ctx->text + (off))
+
+/* Character classification.
+ * Note we assume ASCII compatibility of code points < 128 here. */
+#define ISIN_(ch, ch_min, ch_max)       ((ch_min) <= (unsigned)(ch) && (unsigned)(ch) <= (ch_max))
+#define ISANYOF_(ch, palette)           ((ch) != _T('\0')  &&  md_strchr((palette), (ch)) != NULL)
+#define ISANYOF2_(ch, ch1, ch2)         ((ch) == (ch1) || (ch) == (ch2))
+#define ISANYOF3_(ch, ch1, ch2, ch3)    ((ch) == (ch1) || (ch) == (ch2) || (ch) == (ch3))
+#define ISASCII_(ch)                    ((unsigned)(ch) <= 127)
+#define ISBLANK_(ch)                    (ISANYOF2_((ch), _T(' '), _T('\t')))
+#define ISNEWLINE_(ch)                  (ISANYOF2_((ch), _T('\r'), _T('\n')))
+#define ISWHITESPACE_(ch)               (ISBLANK_(ch) || ISANYOF2_((ch), _T('\v'), _T('\f')))
+#define ISCNTRL_(ch)                    ((unsigned)(ch) <= 31 || (unsigned)(ch) == 127)
+#define ISPUNCT_(ch)                    (ISIN_(ch, 33, 47) || ISIN_(ch, 58, 64) || ISIN_(ch, 91, 96) || ISIN_(ch, 123, 126))
+#define ISUPPER_(ch)                    (ISIN_(ch, _T('A'), _T('Z')))
+#define ISLOWER_(ch)                    (ISIN_(ch, _T('a'), _T('z')))
+#define ISALPHA_(ch)                    (ISUPPER_(ch) || ISLOWER_(ch))
+#define ISDIGIT_(ch)                    (ISIN_(ch, _T('0'), _T('9')))
+#define ISXDIGIT_(ch)                   (ISDIGIT_(ch) || ISIN_(ch, _T('A'), _T('F')) || ISIN_(ch, _T('a'), _T('f')))
+#define ISALNUM_(ch)                    (ISALPHA_(ch) || ISDIGIT_(ch))
+
+#define ISANYOF(off, palette)           ISANYOF_(CH(off), (palette))
+#define ISANYOF2(off, ch1, ch2)         ISANYOF2_(CH(off), (ch1), (ch2))
+#define ISANYOF3(off, ch1, ch2, ch3)    ISANYOF3_(CH(off), (ch1), (ch2), (ch3))
+#define ISASCII(off)                    ISASCII_(CH(off))
+#define ISBLANK(off)                    ISBLANK_(CH(off))
+#define ISNEWLINE(off)                  ISNEWLINE_(CH(off))
+#define ISWHITESPACE(off)               ISWHITESPACE_(CH(off))
+#define ISCNTRL(off)                    ISCNTRL_(CH(off))
+#define ISPUNCT(off)                    ISPUNCT_(CH(off))
+#define ISUPPER(off)                    ISUPPER_(CH(off))
+#define ISLOWER(off)                    ISLOWER_(CH(off))
+#define ISALPHA(off)                    ISALPHA_(CH(off))
+#define ISDIGIT(off)                    ISDIGIT_(CH(off))
+#define ISXDIGIT(off)                   ISXDIGIT_(CH(off))
+#define ISALNUM(off)                    ISALNUM_(CH(off))
+
+
+#if defined MD4C_USE_UTF16
+    #define md_strchr wcschr
+#else
+    #define md_strchr strchr
+#endif
+
+
+/* Case insensitive check of string equality. */
+static inline int
+md_ascii_case_eq(const CHAR* s1, const CHAR* s2, SZ n)
+{
+    OFF i;
+    for(i = 0; i < n; i++) {
+        CHAR ch1 = s1[i];
+        CHAR ch2 = s2[i];
+
+        if(ISLOWER_(ch1))
+            ch1 += ('A'-'a');
+        if(ISLOWER_(ch2))
+            ch2 += ('A'-'a');
+        if(ch1 != ch2)
+            return FALSE;
+    }
+    return TRUE;
+}
+
+static inline int
+md_ascii_eq(const CHAR* s1, const CHAR* s2, SZ n)
+{
+    return memcmp(s1, s2, n * sizeof(CHAR)) == 0;
+}
+
+static int
+md_text_with_null_replacement(MD_CTX* ctx, MD_TEXTTYPE type, const CHAR* str, SZ size)
+{
+    OFF off = 0;
+    int ret = 0;
+
+    while(1) {
+        while(off < size  &&  str[off] != _T('\0'))
+            off++;
+
+        if(off > 0) {
+            ret = ctx->parser.text(type, str, off, ctx->userdata);
+            if(ret != 0)
+                return ret;
+
+            str += off;
+            size -= off;
+            off = 0;
+        }
+
+        if(off >= size)
+            return 0;
+
+        ret = ctx->parser.text(MD_TEXT_NULLCHAR, _T(""), 1, ctx->userdata);
+        if(ret != 0)
+            return ret;
+        off++;
+    }
+}
+
+
+#define MD_CHECK(func)                                                      \
+    do {                                                                    \
+        ret = (func);                                                       \
+        if(ret < 0)                                                         \
+            goto abort;                                                     \
+    } while(0)
+
+
+#define MD_TEMP_BUFFER(sz)                                                  \
+    do {                                                                    \
+        if(sz > ctx->alloc_buffer) {                                        \
+            CHAR* new_buffer;                                               \
+            SZ new_size = ((sz) + (sz) / 2 + 128) & ~127;                   \
+                                                                            \
+            new_buffer = realloc(ctx->buffer, new_size);                    \
+            if(new_buffer == NULL) {                                        \
+                MD_LOG("realloc() failed.");                                \
+                ret = -1;                                                   \
+                goto abort;                                                 \
+            }                                                               \
+                                                                            \
+            ctx->buffer = new_buffer;                                       \
+            ctx->alloc_buffer = new_size;                                   \
+        }                                                                   \
+    } while(0)
+
+
+#define MD_ENTER_BLOCK(type, arg)                                           \
+    do {                                                                    \
+        ret = ctx->parser.enter_block((type), (arg), ctx->userdata);        \
+        if(ret != 0) {                                                      \
+            MD_LOG("Aborted from enter_block() callback.");                 \
+            goto abort;                                                     \
+        }                                                                   \
+    } while(0)
+
+#define MD_LEAVE_BLOCK(type, arg)                                           \
+    do {                                                                    \
+        ret = ctx->parser.leave_block((type), (arg), ctx->userdata);        \
+        if(ret != 0) {                                                      \
+            MD_LOG("Aborted from leave_block() callback.");                 \
+            goto abort;                                                     \
+        }                                                                   \
+    } while(0)
+
+#define MD_ENTER_SPAN(type, arg)                                            \
+    do {                                                                    \
+        ret = ctx->parser.enter_span((type), (arg), ctx->userdata);         \
+        if(ret != 0) {                                                      \
+            MD_LOG("Aborted from enter_span() callback.");                  \
+            goto abort;                                                     \
+        }                                                                   \
+    } while(0)
+
+#define MD_LEAVE_SPAN(type, arg)                                            \
+    do {                                                                    \
+        ret = ctx->parser.leave_span((type), (arg), ctx->userdata);         \
+        if(ret != 0) {                                                      \
+            MD_LOG("Aborted from leave_span() callback.");                  \
+            goto abort;                                                     \
+        }                                                                   \
+    } while(0)
+
+#define MD_TEXT(type, str, size)                                            \
+    do {                                                                    \
+        if(size > 0) {                                                      \
+            ret = ctx->parser.text((type), (str), (size), ctx->userdata);   \
+            if(ret != 0) {                                                  \
+                MD_LOG("Aborted from text() callback.");                    \
+                goto abort;                                                 \
+            }                                                               \
+        }                                                                   \
+    } while(0)
+
+#define MD_TEXT_INSECURE(type, str, size)                                   \
+    do {                                                                    \
+        if(size > 0) {                                                      \
+            ret = md_text_with_null_replacement(ctx, type, str, size);      \
+            if(ret != 0) {                                                  \
+                MD_LOG("Aborted from text() callback.");                    \
+                goto abort;                                                 \
+            }                                                               \
+        }                                                                   \
+    } while(0)
+
+
+
+/*************************
+ ***  Unicode Support  ***
+ *************************/
+
+typedef struct MD_UNICODE_FOLD_INFO_tag MD_UNICODE_FOLD_INFO;
+struct MD_UNICODE_FOLD_INFO_tag {
+    unsigned codepoints[3];
+    unsigned n_codepoints;
+};
+
+
+#if defined MD4C_USE_UTF16 || defined MD4C_USE_UTF8
+    /* Binary search over sorted "map" of codepoints. Consecutive sequences
+     * of codepoints may be encoded in the map by just using the
+     * (MIN_CODEPOINT | 0x40000000) and (MAX_CODEPOINT | 0x80000000).
+     *
+     * Returns index of the found record in the map (in the case of ranges,
+     * the minimal value is used); or -1 on failure. */
+    static int
+    md_unicode_bsearch__(unsigned codepoint, const unsigned* map, size_t map_size)
+    {
+        int beg, end;
+        int pivot_beg, pivot_end;
+
+        beg = 0;
+        end = (int) map_size-1;
+        while(beg <= end) {
+            /* Pivot may be a range, not just a single value. */
+            pivot_beg = pivot_end = (beg + end) / 2;
+            if(map[pivot_end] & 0x40000000)
+                pivot_end++;
+            if(map[pivot_beg] & 0x80000000)
+                pivot_beg--;
+
+            if(codepoint < (map[pivot_beg] & 0x00ffffff))
+                end = pivot_beg - 1;
+            else if(codepoint > (map[pivot_end] & 0x00ffffff))
+                beg = pivot_end + 1;
+            else
+                return pivot_beg;
+        }
+
+        return -1;
+    }
+
+    static int
+    md_is_unicode_whitespace__(unsigned codepoint)
+    {
+#define R(cp_min, cp_max)   ((cp_min) | 0x40000000), ((cp_max) | 0x80000000)
+#define S(cp)               (cp)
+        /* Unicode "Zs" category.
+         * (generated by scripts/build_whitespace_map.py) */
+        static const unsigned WHITESPACE_MAP[] = {
+            S(0x0020), S(0x00a0), S(0x1680), R(0x2000,0x200a), S(0x202f), S(0x205f), S(0x3000)
+        };
+#undef R
+#undef S
+
+        /* The ASCII ones are the most frequently used ones, also CommonMark
+         * specification requests few more in this range. */
+        if(codepoint <= 0x7f)
+            return ISWHITESPACE_(codepoint);
+
+        return (md_unicode_bsearch__(codepoint, WHITESPACE_MAP, SIZEOF_ARRAY(WHITESPACE_MAP)) >= 0);
+    }
+
+    static int
+    md_is_unicode_punct__(unsigned codepoint)
+    {
+#define R(cp_min, cp_max)   ((cp_min) | 0x40000000), ((cp_max) | 0x80000000)
+#define S(cp)               (cp)
+        /* Unicode "Pc", "Pd", "Pe", "Pf", "Pi", "Po", "Ps" categories.
+         * (generated by scripts/build_punct_map.py) */
+        static const unsigned PUNCT_MAP[] = {
+            R(0x0021,0x0023), R(0x0025,0x002a), R(0x002c,0x002f), R(0x003a,0x003b), R(0x003f,0x0040),
+            R(0x005b,0x005d), S(0x005f), S(0x007b), S(0x007d), S(0x00a1), S(0x00a7), S(0x00ab), R(0x00b6,0x00b7),
+            S(0x00bb), S(0x00bf), S(0x037e), S(0x0387), R(0x055a,0x055f), R(0x0589,0x058a), S(0x05be), S(0x05c0),
+            S(0x05c3), S(0x05c6), R(0x05f3,0x05f4), R(0x0609,0x060a), R(0x060c,0x060d), S(0x061b), R(0x061e,0x061f),
+            R(0x066a,0x066d), S(0x06d4), R(0x0700,0x070d), R(0x07f7,0x07f9), R(0x0830,0x083e), S(0x085e),
+            R(0x0964,0x0965), S(0x0970), S(0x09fd), S(0x0a76), S(0x0af0), S(0x0c77), S(0x0c84), S(0x0df4), S(0x0e4f),
+            R(0x0e5a,0x0e5b), R(0x0f04,0x0f12), S(0x0f14), R(0x0f3a,0x0f3d), S(0x0f85), R(0x0fd0,0x0fd4),
+            R(0x0fd9,0x0fda), R(0x104a,0x104f), S(0x10fb), R(0x1360,0x1368), S(0x1400), S(0x166e), R(0x169b,0x169c),
+            R(0x16eb,0x16ed), R(0x1735,0x1736), R(0x17d4,0x17d6), R(0x17d8,0x17da), R(0x1800,0x180a),
+            R(0x1944,0x1945), R(0x1a1e,0x1a1f), R(0x1aa0,0x1aa6), R(0x1aa8,0x1aad), R(0x1b5a,0x1b60),
+            R(0x1bfc,0x1bff), R(0x1c3b,0x1c3f), R(0x1c7e,0x1c7f), R(0x1cc0,0x1cc7), S(0x1cd3), R(0x2010,0x2027),
+            R(0x2030,0x2043), R(0x2045,0x2051), R(0x2053,0x205e), R(0x207d,0x207e), R(0x208d,0x208e),
+            R(0x2308,0x230b), R(0x2329,0x232a), R(0x2768,0x2775), R(0x27c5,0x27c6), R(0x27e6,0x27ef),
+            R(0x2983,0x2998), R(0x29d8,0x29db), R(0x29fc,0x29fd), R(0x2cf9,0x2cfc), R(0x2cfe,0x2cff), S(0x2d70),
+            R(0x2e00,0x2e2e), R(0x2e30,0x2e4f), S(0x2e52), R(0x3001,0x3003), R(0x3008,0x3011), R(0x3014,0x301f),
+            S(0x3030), S(0x303d), S(0x30a0), S(0x30fb), R(0xa4fe,0xa4ff), R(0xa60d,0xa60f), S(0xa673), S(0xa67e),
+            R(0xa6f2,0xa6f7), R(0xa874,0xa877), R(0xa8ce,0xa8cf), R(0xa8f8,0xa8fa), S(0xa8fc), R(0xa92e,0xa92f),
+            S(0xa95f), R(0xa9c1,0xa9cd), R(0xa9de,0xa9df), R(0xaa5c,0xaa5f), R(0xaade,0xaadf), R(0xaaf0,0xaaf1),
+            S(0xabeb), R(0xfd3e,0xfd3f), R(0xfe10,0xfe19), R(0xfe30,0xfe52), R(0xfe54,0xfe61), S(0xfe63), S(0xfe68),
+            R(0xfe6a,0xfe6b), R(0xff01,0xff03), R(0xff05,0xff0a), R(0xff0c,0xff0f), R(0xff1a,0xff1b),
+            R(0xff1f,0xff20), R(0xff3b,0xff3d), S(0xff3f), S(0xff5b), S(0xff5d), R(0xff5f,0xff65), R(0x10100,0x10102),
+            S(0x1039f), S(0x103d0), S(0x1056f), S(0x10857), S(0x1091f), S(0x1093f), R(0x10a50,0x10a58), S(0x10a7f),
+            R(0x10af0,0x10af6), R(0x10b39,0x10b3f), R(0x10b99,0x10b9c), S(0x10ead), R(0x10f55,0x10f59),
+            R(0x11047,0x1104d), R(0x110bb,0x110bc), R(0x110be,0x110c1), R(0x11140,0x11143), R(0x11174,0x11175),
+            R(0x111c5,0x111c8), S(0x111cd), S(0x111db), R(0x111dd,0x111df), R(0x11238,0x1123d), S(0x112a9),
+            R(0x1144b,0x1144f), R(0x1145a,0x1145b), S(0x1145d), S(0x114c6), R(0x115c1,0x115d7), R(0x11641,0x11643),
+            R(0x11660,0x1166c), R(0x1173c,0x1173e), S(0x1183b), R(0x11944,0x11946), S(0x119e2), R(0x11a3f,0x11a46),
+            R(0x11a9a,0x11a9c), R(0x11a9e,0x11aa2), R(0x11c41,0x11c45), R(0x11c70,0x11c71), R(0x11ef7,0x11ef8),
+            S(0x11fff), R(0x12470,0x12474), R(0x16a6e,0x16a6f), S(0x16af5), R(0x16b37,0x16b3b), S(0x16b44),
+            R(0x16e97,0x16e9a), S(0x16fe2), S(0x1bc9f), R(0x1da87,0x1da8b), R(0x1e95e,0x1e95f)
+        };
+#undef R
+#undef S
+
+        /* The ASCII ones are the most frequently used ones, also CommonMark
+         * specification requests few more in this range. */
+        if(codepoint <= 0x7f)
+            return ISPUNCT_(codepoint);
+
+        return (md_unicode_bsearch__(codepoint, PUNCT_MAP, SIZEOF_ARRAY(PUNCT_MAP)) >= 0);
+    }
+
+    static void
+    md_get_unicode_fold_info(unsigned codepoint, MD_UNICODE_FOLD_INFO* info)
+    {
+#define R(cp_min, cp_max)   ((cp_min) | 0x40000000), ((cp_max) | 0x80000000)
+#define S(cp)               (cp)
+        /* Unicode "Pc", "Pd", "Pe", "Pf", "Pi", "Po", "Ps" categories.
+         * (generated by scripts/build_folding_map.py) */
+        static const unsigned FOLD_MAP_1[] = {
+            R(0x0041,0x005a), S(0x00b5), R(0x00c0,0x00d6), R(0x00d8,0x00de), R(0x0100,0x012e), R(0x0132,0x0136),
+            R(0x0139,0x0147), R(0x014a,0x0176), S(0x0178), R(0x0179,0x017d), S(0x017f), S(0x0181), S(0x0182),
+            S(0x0184), S(0x0186), S(0x0187), S(0x0189), S(0x018a), S(0x018b), S(0x018e), S(0x018f), S(0x0190),
+            S(0x0191), S(0x0193), S(0x0194), S(0x0196), S(0x0197), S(0x0198), S(0x019c), S(0x019d), S(0x019f),
+            R(0x01a0,0x01a4), S(0x01a6), S(0x01a7), S(0x01a9), S(0x01ac), S(0x01ae), S(0x01af), S(0x01b1), S(0x01b2),
+            S(0x01b3), S(0x01b5), S(0x01b7), S(0x01b8), S(0x01bc), S(0x01c4), S(0x01c5), S(0x01c7), S(0x01c8),
+            S(0x01ca), R(0x01cb,0x01db), R(0x01de,0x01ee), S(0x01f1), S(0x01f2), S(0x01f4), S(0x01f6), S(0x01f7),
+            R(0x01f8,0x021e), S(0x0220), R(0x0222,0x0232), S(0x023a), S(0x023b), S(0x023d), S(0x023e), S(0x0241),
+            S(0x0243), S(0x0244), S(0x0245), R(0x0246,0x024e), S(0x0345), S(0x0370), S(0x0372), S(0x0376), S(0x037f),
+            S(0x0386), R(0x0388,0x038a), S(0x038c), S(0x038e), S(0x038f), R(0x0391,0x03a1), R(0x03a3,0x03ab),
+            S(0x03c2), S(0x03cf), S(0x03d0), S(0x03d1), S(0x03d5), S(0x03d6), R(0x03d8,0x03ee), S(0x03f0), S(0x03f1),
+            S(0x03f4), S(0x03f5), S(0x03f7), S(0x03f9), S(0x03fa), R(0x03fd,0x03ff), R(0x0400,0x040f),
+            R(0x0410,0x042f), R(0x0460,0x0480), R(0x048a,0x04be), S(0x04c0), R(0x04c1,0x04cd), R(0x04d0,0x052e),
+            R(0x0531,0x0556), R(0x10a0,0x10c5), S(0x10c7), S(0x10cd), R(0x13f8,0x13fd), S(0x1c80), S(0x1c81),
+            S(0x1c82), S(0x1c83), S(0x1c84), S(0x1c85), S(0x1c86), S(0x1c87), S(0x1c88), R(0x1c90,0x1cba),
+            R(0x1cbd,0x1cbf), R(0x1e00,0x1e94), S(0x1e9b), R(0x1ea0,0x1efe), R(0x1f08,0x1f0f), R(0x1f18,0x1f1d),
+            R(0x1f28,0x1f2f), R(0x1f38,0x1f3f), R(0x1f48,0x1f4d), S(0x1f59), S(0x1f5b), S(0x1f5d), S(0x1f5f),
+            R(0x1f68,0x1f6f), S(0x1fb8), S(0x1fb9), S(0x1fba), S(0x1fbb), S(0x1fbe), R(0x1fc8,0x1fcb), S(0x1fd8),
+            S(0x1fd9), S(0x1fda), S(0x1fdb), S(0x1fe8), S(0x1fe9), S(0x1fea), S(0x1feb), S(0x1fec), S(0x1ff8),
+            S(0x1ff9), S(0x1ffa), S(0x1ffb), S(0x2126), S(0x212a), S(0x212b), S(0x2132), R(0x2160,0x216f), S(0x2183),
+            R(0x24b6,0x24cf), R(0x2c00,0x2c2e), S(0x2c60), S(0x2c62), S(0x2c63), S(0x2c64), R(0x2c67,0x2c6b),
+            S(0x2c6d), S(0x2c6e), S(0x2c6f), S(0x2c70), S(0x2c72), S(0x2c75), S(0x2c7e), S(0x2c7f), R(0x2c80,0x2ce2),
+            S(0x2ceb), S(0x2ced), S(0x2cf2), R(0xa640,0xa66c), R(0xa680,0xa69a), R(0xa722,0xa72e), R(0xa732,0xa76e),
+            S(0xa779), S(0xa77b), S(0xa77d), R(0xa77e,0xa786), S(0xa78b), S(0xa78d), S(0xa790), S(0xa792),
+            R(0xa796,0xa7a8), S(0xa7aa), S(0xa7ab), S(0xa7ac), S(0xa7ad), S(0xa7ae), S(0xa7b0), S(0xa7b1), S(0xa7b2),
+            S(0xa7b3), R(0xa7b4,0xa7be), S(0xa7c2), S(0xa7c4), S(0xa7c5), S(0xa7c6), S(0xa7c7), S(0xa7c9), S(0xa7f5),
+            R(0xab70,0xabbf), R(0xff21,0xff3a), R(0x10400,0x10427), R(0x104b0,0x104d3), R(0x10c80,0x10cb2),
+            R(0x118a0,0x118bf), R(0x16e40,0x16e5f), R(0x1e900,0x1e921)
+        };
+        static const unsigned FOLD_MAP_1_DATA[] = {
+            0x0061, 0x007a, 0x03bc, 0x00e0, 0x00f6, 0x00f8, 0x00fe, 0x0101, 0x012f, 0x0133, 0x0137, 0x013a, 0x0148,
+            0x014b, 0x0177, 0x00ff, 0x017a, 0x017e, 0x0073, 0x0253, 0x0183, 0x0185, 0x0254, 0x0188, 0x0256, 0x0257,
+            0x018c, 0x01dd, 0x0259, 0x025b, 0x0192, 0x0260, 0x0263, 0x0269, 0x0268, 0x0199, 0x026f, 0x0272, 0x0275,
+            0x01a1, 0x01a5, 0x0280, 0x01a8, 0x0283, 0x01ad, 0x0288, 0x01b0, 0x028a, 0x028b, 0x01b4, 0x01b6, 0x0292,
+            0x01b9, 0x01bd, 0x01c6, 0x01c6, 0x01c9, 0x01c9, 0x01cc, 0x01cc, 0x01dc, 0x01df, 0x01ef, 0x01f3, 0x01f3,
+            0x01f5, 0x0195, 0x01bf, 0x01f9, 0x021f, 0x019e, 0x0223, 0x0233, 0x2c65, 0x023c, 0x019a, 0x2c66, 0x0242,
+            0x0180, 0x0289, 0x028c, 0x0247, 0x024f, 0x03b9, 0x0371, 0x0373, 0x0377, 0x03f3, 0x03ac, 0x03ad, 0x03af,
+            0x03cc, 0x03cd, 0x03ce, 0x03b1, 0x03c1, 0x03c3, 0x03cb, 0x03c3, 0x03d7, 0x03b2, 0x03b8, 0x03c6, 0x03c0,
+            0x03d9, 0x03ef, 0x03ba, 0x03c1, 0x03b8, 0x03b5, 0x03f8, 0x03f2, 0x03fb, 0x037b, 0x037d, 0x0450, 0x045f,
+            0x0430, 0x044f, 0x0461, 0x0481, 0x048b, 0x04bf, 0x04cf, 0x04c2, 0x04ce, 0x04d1, 0x052f, 0x0561, 0x0586,
+            0x2d00, 0x2d25, 0x2d27, 0x2d2d, 0x13f0, 0x13f5, 0x0432, 0x0434, 0x043e, 0x0441, 0x0442, 0x0442, 0x044a,
+            0x0463, 0xa64b, 0x10d0, 0x10fa, 0x10fd, 0x10ff, 0x1e01, 0x1e95, 0x1e61, 0x1ea1, 0x1eff, 0x1f00, 0x1f07,
+            0x1f10, 0x1f15, 0x1f20, 0x1f27, 0x1f30, 0x1f37, 0x1f40, 0x1f45, 0x1f51, 0x1f53, 0x1f55, 0x1f57, 0x1f60,
+            0x1f67, 0x1fb0, 0x1fb1, 0x1f70, 0x1f71, 0x03b9, 0x1f72, 0x1f75, 0x1fd0, 0x1fd1, 0x1f76, 0x1f77, 0x1fe0,
+            0x1fe1, 0x1f7a, 0x1f7b, 0x1fe5, 0x1f78, 0x1f79, 0x1f7c, 0x1f7d, 0x03c9, 0x006b, 0x00e5, 0x214e, 0x2170,
+            0x217f, 0x2184, 0x24d0, 0x24e9, 0x2c30, 0x2c5e, 0x2c61, 0x026b, 0x1d7d, 0x027d, 0x2c68, 0x2c6c, 0x0251,
+            0x0271, 0x0250, 0x0252, 0x2c73, 0x2c76, 0x023f, 0x0240, 0x2c81, 0x2ce3, 0x2cec, 0x2cee, 0x2cf3, 0xa641,
+            0xa66d, 0xa681, 0xa69b, 0xa723, 0xa72f, 0xa733, 0xa76f, 0xa77a, 0xa77c, 0x1d79, 0xa77f, 0xa787, 0xa78c,
+            0x0265, 0xa791, 0xa793, 0xa797, 0xa7a9, 0x0266, 0x025c, 0x0261, 0x026c, 0x026a, 0x029e, 0x0287, 0x029d,
+            0xab53, 0xa7b5, 0xa7bf, 0xa7c3, 0xa794, 0x0282, 0x1d8e, 0xa7c8, 0xa7ca, 0xa7f6, 0x13a0, 0x13ef, 0xff41,
+            0xff5a, 0x10428, 0x1044f, 0x104d8, 0x104fb, 0x10cc0, 0x10cf2, 0x118c0, 0x118df, 0x16e60, 0x16e7f, 0x1e922,
+            0x1e943
+        };
+        static const unsigned FOLD_MAP_2[] = {
+            S(0x00df), S(0x0130), S(0x0149), S(0x01f0), S(0x0587), S(0x1e96), S(0x1e97), S(0x1e98), S(0x1e99),
+            S(0x1e9a), S(0x1e9e), S(0x1f50), R(0x1f80,0x1f87), R(0x1f88,0x1f8f), R(0x1f90,0x1f97), R(0x1f98,0x1f9f),
+            R(0x1fa0,0x1fa7), R(0x1fa8,0x1faf), S(0x1fb2), S(0x1fb3), S(0x1fb4), S(0x1fb6), S(0x1fbc), S(0x1fc2),
+            S(0x1fc3), S(0x1fc4), S(0x1fc6), S(0x1fcc), S(0x1fd6), S(0x1fe4), S(0x1fe6), S(0x1ff2), S(0x1ff3),
+            S(0x1ff4), S(0x1ff6), S(0x1ffc), S(0xfb00), S(0xfb01), S(0xfb02), S(0xfb05), S(0xfb06), S(0xfb13),
+            S(0xfb14), S(0xfb15), S(0xfb16), S(0xfb17)
+        };
+        static const unsigned FOLD_MAP_2_DATA[] = {
+            0x0073,0x0073, 0x0069,0x0307, 0x02bc,0x006e, 0x006a,0x030c, 0x0565,0x0582, 0x0068,0x0331, 0x0074,0x0308,
+            0x0077,0x030a, 0x0079,0x030a, 0x0061,0x02be, 0x0073,0x0073, 0x03c5,0x0313, 0x1f00,0x03b9, 0x1f07,0x03b9,
+            0x1f00,0x03b9, 0x1f07,0x03b9, 0x1f20,0x03b9, 0x1f27,0x03b9, 0x1f20,0x03b9, 0x1f27,0x03b9, 0x1f60,0x03b9,
+            0x1f67,0x03b9, 0x1f60,0x03b9, 0x1f67,0x03b9, 0x1f70,0x03b9, 0x03b1,0x03b9, 0x03ac,0x03b9, 0x03b1,0x0342,
+            0x03b1,0x03b9, 0x1f74,0x03b9, 0x03b7,0x03b9, 0x03ae,0x03b9, 0x03b7,0x0342, 0x03b7,0x03b9, 0x03b9,0x0342,
+            0x03c1,0x0313, 0x03c5,0x0342, 0x1f7c,0x03b9, 0x03c9,0x03b9, 0x03ce,0x03b9, 0x03c9,0x0342, 0x03c9,0x03b9,
+            0x0066,0x0066, 0x0066,0x0069, 0x0066,0x006c, 0x0073,0x0074, 0x0073,0x0074, 0x0574,0x0576, 0x0574,0x0565,
+            0x0574,0x056b, 0x057e,0x0576, 0x0574,0x056d
+        };
+        static const unsigned FOLD_MAP_3[] = {
+            S(0x0390), S(0x03b0), S(0x1f52), S(0x1f54), S(0x1f56), S(0x1fb7), S(0x1fc7), S(0x1fd2), S(0x1fd3),
+            S(0x1fd7), S(0x1fe2), S(0x1fe3), S(0x1fe7), S(0x1ff7), S(0xfb03), S(0xfb04)
+        };
+        static const unsigned FOLD_MAP_3_DATA[] = {
+            0x03b9,0x0308,0x0301, 0x03c5,0x0308,0x0301, 0x03c5,0x0313,0x0300, 0x03c5,0x0313,0x0301,
+            0x03c5,0x0313,0x0342, 0x03b1,0x0342,0x03b9, 0x03b7,0x0342,0x03b9, 0x03b9,0x0308,0x0300,
+            0x03b9,0x0308,0x0301, 0x03b9,0x0308,0x0342, 0x03c5,0x0308,0x0300, 0x03c5,0x0308,0x0301,
+            0x03c5,0x0308,0x0342, 0x03c9,0x0342,0x03b9, 0x0066,0x0066,0x0069, 0x0066,0x0066,0x006c
+        };
+#undef R
+#undef S
+        static const struct {
+            const unsigned* map;
+            const unsigned* data;
+            size_t map_size;
+            unsigned n_codepoints;
+        } FOLD_MAP_LIST[] = {
+            { FOLD_MAP_1, FOLD_MAP_1_DATA, SIZEOF_ARRAY(FOLD_MAP_1), 1 },
+            { FOLD_MAP_2, FOLD_MAP_2_DATA, SIZEOF_ARRAY(FOLD_MAP_2), 2 },
+            { FOLD_MAP_3, FOLD_MAP_3_DATA, SIZEOF_ARRAY(FOLD_MAP_3), 3 }
+        };
+
+        int i;
+
+        /* Fast path for ASCII characters. */
+        if(codepoint <= 0x7f) {
+            info->codepoints[0] = codepoint;
+            if(ISUPPER_(codepoint))
+                info->codepoints[0] += 'a' - 'A';
+            info->n_codepoints = 1;
+            return;
+        }
+
+        /* Try to locate the codepoint in any of the maps. */
+        for(i = 0; i < (int) SIZEOF_ARRAY(FOLD_MAP_LIST); i++) {
+            int index;
+
+            index = md_unicode_bsearch__(codepoint, FOLD_MAP_LIST[i].map, FOLD_MAP_LIST[i].map_size);
+            if(index >= 0) {
+                /* Found the mapping. */
+                unsigned n_codepoints = FOLD_MAP_LIST[i].n_codepoints;
+                const unsigned* map = FOLD_MAP_LIST[i].map;
+                const unsigned* codepoints = FOLD_MAP_LIST[i].data + (index * n_codepoints);
+
+                memcpy(info->codepoints, codepoints, sizeof(unsigned) * n_codepoints);
+                info->n_codepoints = n_codepoints;
+
+                if(FOLD_MAP_LIST[i].map[index] != codepoint) {
+                    /* The found mapping maps whole range of codepoints,
+                     * i.e. we have to offset info->codepoints[0] accordingly. */
+                    if((map[index] & 0x00ffffff)+1 == codepoints[0]) {
+                        /* Alternating type of the range. */
+                        info->codepoints[0] = codepoint + ((codepoint & 0x1) == (map[index] & 0x1) ? 1 : 0);
+                    } else {
+                        /* Range to range kind of mapping. */
+                        info->codepoints[0] += (codepoint - (map[index] & 0x00ffffff));
+                    }
+                }
+
+                return;
+            }
+        }
+
+        /* No mapping found. Map the codepoint to itself. */
+        info->codepoints[0] = codepoint;
+        info->n_codepoints = 1;
+    }
+#endif
+
+
+#if defined MD4C_USE_UTF16
+    #define IS_UTF16_SURROGATE_HI(word)     (((WORD)(word) & 0xfc00) == 0xd800)
+    #define IS_UTF16_SURROGATE_LO(word)     (((WORD)(word) & 0xfc00) == 0xdc00)
+    #define UTF16_DECODE_SURROGATE(hi, lo)  (0x10000 + ((((unsigned)(hi) & 0x3ff) << 10) | (((unsigned)(lo) & 0x3ff) << 0)))
+
+    static unsigned
+    md_decode_utf16le__(const CHAR* str, SZ str_size, SZ* p_size)
+    {
+        if(IS_UTF16_SURROGATE_HI(str[0])) {
+            if(1 < str_size && IS_UTF16_SURROGATE_LO(str[1])) {
+                if(p_size != NULL)
+                    *p_size = 2;
+                return UTF16_DECODE_SURROGATE(str[0], str[1]);
+            }
+        }
+
+        if(p_size != NULL)
+            *p_size = 1;
+        return str[0];
+    }
+
+    static unsigned
+    md_decode_utf16le_before__(MD_CTX* ctx, OFF off)
+    {
+        if(off > 2 && IS_UTF16_SURROGATE_HI(CH(off-2)) && IS_UTF16_SURROGATE_LO(CH(off-1)))
+            return UTF16_DECODE_SURROGATE(CH(off-2), CH(off-1));
+
+        return CH(off);
+    }
+
+    /* No whitespace uses surrogates, so no decoding needed here. */
+    #define ISUNICODEWHITESPACE_(codepoint) md_is_unicode_whitespace__(codepoint)
+    #define ISUNICODEWHITESPACE(off)        md_is_unicode_whitespace__(CH(off))
+    #define ISUNICODEWHITESPACEBEFORE(off)  md_is_unicode_whitespace__(CH((off)-1))
+
+    #define ISUNICODEPUNCT(off)             md_is_unicode_punct__(md_decode_utf16le__(STR(off), ctx->size - (off), NULL))
+    #define ISUNICODEPUNCTBEFORE(off)       md_is_unicode_punct__(md_decode_utf16le_before__(ctx, off))
+
+    static inline int
+    md_decode_unicode(const CHAR* str, OFF off, SZ str_size, SZ* p_char_size)
+    {
+        return md_decode_utf16le__(str+off, str_size-off, p_char_size);
+    }
+#elif defined MD4C_USE_UTF8
+    #define IS_UTF8_LEAD1(byte)     ((unsigned char)(byte) <= 0x7f)
+    #define IS_UTF8_LEAD2(byte)     (((unsigned char)(byte) & 0xe0) == 0xc0)
+    #define IS_UTF8_LEAD3(byte)     (((unsigned char)(byte) & 0xf0) == 0xe0)
+    #define IS_UTF8_LEAD4(byte)     (((unsigned char)(byte) & 0xf8) == 0xf0)
+    #define IS_UTF8_TAIL(byte)      (((unsigned char)(byte) & 0xc0) == 0x80)
+
+    static unsigned
+    md_decode_utf8__(const CHAR* str, SZ str_size, SZ* p_size)
+    {
+        if(!IS_UTF8_LEAD1(str[0])) {
+            if(IS_UTF8_LEAD2(str[0])) {
+                if(1 < str_size && IS_UTF8_TAIL(str[1])) {
+                    if(p_size != NULL)
+                        *p_size = 2;
+
+                    return (((unsigned int)str[0] & 0x1f) << 6) |
+                           (((unsigned int)str[1] & 0x3f) << 0);
+                }
+            } else if(IS_UTF8_LEAD3(str[0])) {
+                if(2 < str_size && IS_UTF8_TAIL(str[1]) && IS_UTF8_TAIL(str[2])) {
+                    if(p_size != NULL)
+                        *p_size = 3;
+
+                    return (((unsigned int)str[0] & 0x0f) << 12) |
+                           (((unsigned int)str[1] & 0x3f) << 6) |
+                           (((unsigned int)str[2] & 0x3f) << 0);
+                }
+            } else if(IS_UTF8_LEAD4(str[0])) {
+                if(3 < str_size && IS_UTF8_TAIL(str[1]) && IS_UTF8_TAIL(str[2]) && IS_UTF8_TAIL(str[3])) {
+                    if(p_size != NULL)
+                        *p_size = 4;
+
+                    return (((unsigned int)str[0] & 0x07) << 18) |
+                           (((unsigned int)str[1] & 0x3f) << 12) |
+                           (((unsigned int)str[2] & 0x3f) << 6) |
+                           (((unsigned int)str[3] & 0x3f) << 0);
+                }
+            }
+        }
+
+        if(p_size != NULL)
+            *p_size = 1;
+        return (unsigned) str[0];
+    }
+
+    static unsigned
+    md_decode_utf8_before__(MD_CTX* ctx, OFF off)
+    {
+        if(!IS_UTF8_LEAD1(CH(off-1))) {
+            if(off > 1 && IS_UTF8_LEAD2(CH(off-2)) && IS_UTF8_TAIL(CH(off-1)))
+                return (((unsigned int)CH(off-2) & 0x1f) << 6) |
+                       (((unsigned int)CH(off-1) & 0x3f) << 0);
+
+            if(off > 2 && IS_UTF8_LEAD3(CH(off-3)) && IS_UTF8_TAIL(CH(off-2)) && IS_UTF8_TAIL(CH(off-1)))
+                return (((unsigned int)CH(off-3) & 0x0f) << 12) |
+                       (((unsigned int)CH(off-2) & 0x3f) << 6) |
+                       (((unsigned int)CH(off-1) & 0x3f) << 0);
+
+            if(off > 3 && IS_UTF8_LEAD4(CH(off-4)) && IS_UTF8_TAIL(CH(off-3)) && IS_UTF8_TAIL(CH(off-2)) && IS_UTF8_TAIL(CH(off-1)))
+                return (((unsigned int)CH(off-4) & 0x07) << 18) |
+                       (((unsigned int)CH(off-3) & 0x3f) << 12) |
+                       (((unsigned int)CH(off-2) & 0x3f) << 6) |
+                       (((unsigned int)CH(off-1) & 0x3f) << 0);
+        }
+
+        return (unsigned) CH(off-1);
+    }
+
+    #define ISUNICODEWHITESPACE_(codepoint) md_is_unicode_whitespace__(codepoint)
+    #define ISUNICODEWHITESPACE(off)        md_is_unicode_whitespace__(md_decode_utf8__(STR(off), ctx->size - (off), NULL))
+    #define ISUNICODEWHITESPACEBEFORE(off)  md_is_unicode_whitespace__(md_decode_utf8_before__(ctx, off))
+
+    #define ISUNICODEPUNCT(off)             md_is_unicode_punct__(md_decode_utf8__(STR(off), ctx->size - (off), NULL))
+    #define ISUNICODEPUNCTBEFORE(off)       md_is_unicode_punct__(md_decode_utf8_before__(ctx, off))
+
+    static inline unsigned
+    md_decode_unicode(const CHAR* str, OFF off, SZ str_size, SZ* p_char_size)
+    {
+        return md_decode_utf8__(str+off, str_size-off, p_char_size);
+    }
+#else
+    #define ISUNICODEWHITESPACE_(codepoint) ISWHITESPACE_(codepoint)
+    #define ISUNICODEWHITESPACE(off)        ISWHITESPACE(off)
+    #define ISUNICODEWHITESPACEBEFORE(off)  ISWHITESPACE((off)-1)
+
+    #define ISUNICODEPUNCT(off)             ISPUNCT(off)
+    #define ISUNICODEPUNCTBEFORE(off)       ISPUNCT((off)-1)
+
+    static inline void
+    md_get_unicode_fold_info(unsigned codepoint, MD_UNICODE_FOLD_INFO* info)
+    {
+        info->codepoints[0] = codepoint;
+        if(ISUPPER_(codepoint))
+            info->codepoints[0] += 'a' - 'A';
+        info->n_codepoints = 1;
+    }
+
+    static inline unsigned
+    md_decode_unicode(const CHAR* str, OFF off, SZ str_size, SZ* p_size)
+    {
+        *p_size = 1;
+        return (unsigned) str[off];
+    }
+#endif
+
+
+/*************************************
+ ***  Helper string manipulations  ***
+ *************************************/
+
+/* Fill buffer with copy of the string between 'beg' and 'end' but replace any
+ * line breaks with given replacement character.
+ *
+ * NOTE: Caller is responsible to make sure the buffer is large enough.
+ * (Given the output is always shorter then input, (end - beg) is good idea
+ * what the caller should allocate.)
+ */
+static void
+md_merge_lines(MD_CTX* ctx, OFF beg, OFF end, const MD_LINE* lines, int n_lines,
+               CHAR line_break_replacement_char, CHAR* buffer, SZ* p_size)
+{
+    CHAR* ptr = buffer;
+    int line_index = 0;
+    OFF off = beg;
+
+    MD_UNUSED(n_lines);
+
+    while(1) {
+        const MD_LINE* line = &lines[line_index];
+        OFF line_end = line->end;
+        if(end < line_end)
+            line_end = end;
+
+        while(off < line_end) {
+            *ptr = CH(off);
+            ptr++;
+            off++;
+        }
+
+        if(off >= end) {
+            *p_size = (MD_SIZE)(ptr - buffer);
+            return;
+        }
+
+        *ptr = line_break_replacement_char;
+        ptr++;
+
+        line_index++;
+        off = lines[line_index].beg;
+    }
+}
+
+/* Wrapper of md_merge_lines() which allocates new buffer for the output string.
+ */
+static int
+md_merge_lines_alloc(MD_CTX* ctx, OFF beg, OFF end, const MD_LINE* lines, int n_lines,
+                    CHAR line_break_replacement_char, CHAR** p_str, SZ* p_size)
+{
+    CHAR* buffer;
+
+    buffer = (CHAR*) malloc(sizeof(CHAR) * (end - beg));
+    if(buffer == NULL) {
+        MD_LOG("malloc() failed.");
+        return -1;
+    }
+
+    md_merge_lines(ctx, beg, end, lines, n_lines,
+                line_break_replacement_char, buffer, p_size);
+
+    *p_str = buffer;
+    return 0;
+}
+
+static OFF
+md_skip_unicode_whitespace(const CHAR* label, OFF off, SZ size)
+{
+    SZ char_size;
+    unsigned codepoint;
+
+    while(off < size) {
+        codepoint = md_decode_unicode(label, off, size, &char_size);
+        if(!ISUNICODEWHITESPACE_(codepoint)  &&  !ISNEWLINE_(label[off]))
+            break;
+        off += char_size;
+    }
+
+    return off;
+}
+
+
+/******************************
+ ***  Recognizing raw HTML  ***
+ ******************************/
+
+/* md_is_html_tag() may be called when processing inlines (inline raw HTML)
+ * or when breaking document to blocks (checking for start of HTML block type 7).
+ *
+ * When breaking document to blocks, we do not yet know line boundaries, but
+ * in that case the whole tag has to live on a single line. We distinguish this
+ * by n_lines == 0.
+ */
+static int
+md_is_html_tag(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+    int attr_state;
+    OFF off = beg;
+    OFF line_end = (n_lines > 0) ? lines[0].end : ctx->size;
+    int i = 0;
+
+    MD_ASSERT(CH(beg) == _T('<'));
+
+    if(off + 1 >= line_end)
+        return FALSE;
+    off++;
+
+    /* For parsing attributes, we need a little state automaton below.
+     * State -1: no attributes are allowed.
+     * State 0: attribute could follow after some whitespace.
+     * State 1: after a whitespace (attribute name may follow).
+     * State 2: after attribute name ('=' MAY follow).
+     * State 3: after '=' (value specification MUST follow).
+     * State 41: in middle of unquoted attribute value.
+     * State 42: in middle of single-quoted attribute value.
+     * State 43: in middle of double-quoted attribute value.
+     */
+    attr_state = 0;
+
+    if(CH(off) == _T('/')) {
+        /* Closer tag "". No attributes may be present. */
+        attr_state = -1;
+        off++;
+    }
+
+    /* Tag name */
+    if(off >= line_end  ||  !ISALPHA(off))
+        return FALSE;
+    off++;
+    while(off < line_end  &&  (ISALNUM(off)  ||  CH(off) == _T('-')))
+        off++;
+
+    /* (Optional) attributes (if not closer), (optional) '/' (if not closer)
+     * and final '>'. */
+    while(1) {
+        while(off < line_end  &&  !ISNEWLINE(off)) {
+            if(attr_state > 40) {
+                if(attr_state == 41 && (ISBLANK(off) || ISANYOF(off, _T("\"'=<>`")))) {
+                    attr_state = 0;
+                    off--;  /* Put the char back for re-inspection in the new state. */
+                } else if(attr_state == 42 && CH(off) == _T('\'')) {
+                    attr_state = 0;
+                } else if(attr_state == 43 && CH(off) == _T('"')) {
+                    attr_state = 0;
+                }
+                off++;
+            } else if(ISWHITESPACE(off)) {
+                if(attr_state == 0)
+                    attr_state = 1;
+                off++;
+            } else if(attr_state <= 2 && CH(off) == _T('>')) {
+                /* End. */
+                goto done;
+            } else if(attr_state <= 2 && CH(off) == _T('/') && off+1 < line_end && CH(off+1) == _T('>')) {
+                /* End with digraph '/>' */
+                off++;
+                goto done;
+            } else if((attr_state == 1 || attr_state == 2) && (ISALPHA(off) || CH(off) == _T('_') || CH(off) == _T(':'))) {
+                off++;
+                /* Attribute name */
+                while(off < line_end && (ISALNUM(off) || ISANYOF(off, _T("_.:-"))))
+                    off++;
+                attr_state = 2;
+            } else if(attr_state == 2 && CH(off) == _T('=')) {
+                /* Attribute assignment sign */
+                off++;
+                attr_state = 3;
+            } else if(attr_state == 3) {
+                /* Expecting start of attribute value. */
+                if(CH(off) == _T('"'))
+                    attr_state = 43;
+                else if(CH(off) == _T('\''))
+                    attr_state = 42;
+                else if(!ISANYOF(off, _T("\"'=<>`"))  &&  !ISNEWLINE(off))
+                    attr_state = 41;
+                else
+                    return FALSE;
+                off++;
+            } else {
+                /* Anything unexpected. */
+                return FALSE;
+            }
+        }
+
+        /* We have to be on a single line. See definition of start condition
+         * of HTML block, type 7. */
+        if(n_lines == 0)
+            return FALSE;
+
+        i++;
+        if(i >= n_lines)
+            return FALSE;
+
+        off = lines[i].beg;
+        line_end = lines[i].end;
+
+        if(attr_state == 0  ||  attr_state == 41)
+            attr_state = 1;
+
+        if(off >= max_end)
+            return FALSE;
+    }
+
+done:
+    if(off >= max_end)
+        return FALSE;
+
+    *p_end = off+1;
+    return TRUE;
+}
+
+static int
+md_scan_for_html_closer(MD_CTX* ctx, const MD_CHAR* str, MD_SIZE len,
+                        const MD_LINE* lines, int n_lines,
+                        OFF beg, OFF max_end, OFF* p_end,
+                        OFF* p_scan_horizon)
+{
+    OFF off = beg;
+    int i = 0;
+
+    if(off < *p_scan_horizon  &&  *p_scan_horizon >= max_end - len) {
+        /* We have already scanned the range up to the max_end so we know
+         * there is nothing to see. */
+        return FALSE;
+    }
+
+    while(TRUE) {
+        while(off + len <= lines[i].end  &&  off + len <= max_end) {
+            if(md_ascii_eq(STR(off), str, len)) {
+                /* Success. */
+                *p_end = off + len;
+                return TRUE;
+            }
+            off++;
+        }
+
+        i++;
+        if(off >= max_end  ||  i >= n_lines) {
+            /* Failure. */
+            *p_scan_horizon = off;
+            return FALSE;
+        }
+
+        off = lines[i].beg;
+    }
+}
+
+static int
+md_is_html_comment(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+    OFF off = beg;
+
+    MD_ASSERT(CH(beg) == _T('<'));
+
+    if(off + 4 >= lines[0].end)
+        return FALSE;
+    if(CH(off+1) != _T('!')  ||  CH(off+2) != _T('-')  ||  CH(off+3) != _T('-'))
+        return FALSE;
+    off += 4;
+
+    /* ">" and "->" must not follow the opening. */
+    if(off < lines[0].end  &&  CH(off) == _T('>'))
+        return FALSE;
+    if(off+1 < lines[0].end  &&  CH(off) == _T('-')  &&  CH(off+1) == _T('>'))
+        return FALSE;
+
+    /* HTML comment must not contain "--", so we scan just for "--" instead
+     * of "-->" and verify manually that '>' follows. */
+    if(md_scan_for_html_closer(ctx, _T("--"), 2,
+                lines, n_lines, off, max_end, p_end, &ctx->html_comment_horizon))
+    {
+        if(*p_end < max_end  &&  CH(*p_end) == _T('>')) {
+            *p_end = *p_end + 1;
+            return TRUE;
+        }
+    }
+
+    return FALSE;
+}
+
+static int
+md_is_html_processing_instruction(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+    OFF off = beg;
+
+    if(off + 2 >= lines[0].end)
+        return FALSE;
+    if(CH(off+1) != _T('?'))
+        return FALSE;
+    off += 2;
+
+    return md_scan_for_html_closer(ctx, _T("?>"), 2,
+                lines, n_lines, off, max_end, p_end, &ctx->html_proc_instr_horizon);
+}
+
+static int
+md_is_html_declaration(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+    OFF off = beg;
+
+    if(off + 2 >= lines[0].end)
+        return FALSE;
+    if(CH(off+1) != _T('!'))
+        return FALSE;
+    off += 2;
+
+    /* Declaration name. */
+    if(off >= lines[0].end  ||  !ISALPHA(off))
+        return FALSE;
+    off++;
+    while(off < lines[0].end  &&  ISALPHA(off))
+        off++;
+    if(off < lines[0].end  &&  !ISWHITESPACE(off))
+        return FALSE;
+
+    return md_scan_for_html_closer(ctx, _T(">"), 1,
+                lines, n_lines, off, max_end, p_end, &ctx->html_decl_horizon);
+}
+
+static int
+md_is_html_cdata(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+    static const CHAR open_str[] = _T("= lines[0].end)
+        return FALSE;
+    if(memcmp(STR(off), open_str, open_size) != 0)
+        return FALSE;
+    off += open_size;
+
+    if(lines[n_lines-1].end < max_end)
+        max_end = lines[n_lines-1].end - 2;
+
+    return md_scan_for_html_closer(ctx, _T("]]>"), 3,
+                lines, n_lines, off, max_end, p_end, &ctx->html_cdata_horizon);
+}
+
+static int
+md_is_html_any(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg, OFF max_end, OFF* p_end)
+{
+    MD_ASSERT(CH(beg) == _T('<'));
+    return (md_is_html_tag(ctx, lines, n_lines, beg, max_end, p_end)  ||
+            md_is_html_comment(ctx, lines, n_lines, beg, max_end, p_end)  ||
+            md_is_html_processing_instruction(ctx, lines, n_lines, beg, max_end, p_end)  ||
+            md_is_html_declaration(ctx, lines, n_lines, beg, max_end, p_end)  ||
+            md_is_html_cdata(ctx, lines, n_lines, beg, max_end, p_end));
+}
+
+
+/****************************
+ ***  Recognizing Entity  ***
+ ****************************/
+
+static int
+md_is_hex_entity_contents(MD_CTX* ctx, const CHAR* text, OFF beg, OFF max_end, OFF* p_end)
+{
+    OFF off = beg;
+    MD_UNUSED(ctx);
+
+    while(off < max_end  &&  ISXDIGIT_(text[off])  &&  off - beg <= 8)
+        off++;
+
+    if(1 <= off - beg  &&  off - beg <= 6) {
+        *p_end = off;
+        return TRUE;
+    } else {
+        return FALSE;
+    }
+}
+
+static int
+md_is_dec_entity_contents(MD_CTX* ctx, const CHAR* text, OFF beg, OFF max_end, OFF* p_end)
+{
+    OFF off = beg;
+    MD_UNUSED(ctx);
+
+    while(off < max_end  &&  ISDIGIT_(text[off])  &&  off - beg <= 8)
+        off++;
+
+    if(1 <= off - beg  &&  off - beg <= 7) {
+        *p_end = off;
+        return TRUE;
+    } else {
+        return FALSE;
+    }
+}
+
+static int
+md_is_named_entity_contents(MD_CTX* ctx, const CHAR* text, OFF beg, OFF max_end, OFF* p_end)
+{
+    OFF off = beg;
+    MD_UNUSED(ctx);
+
+    if(off < max_end  &&  ISALPHA_(text[off]))
+        off++;
+    else
+        return FALSE;
+
+    while(off < max_end  &&  ISALNUM_(text[off])  &&  off - beg <= 48)
+        off++;
+
+    if(2 <= off - beg  &&  off - beg <= 48) {
+        *p_end = off;
+        return TRUE;
+    } else {
+        return FALSE;
+    }
+}
+
+static int
+md_is_entity_str(MD_CTX* ctx, const CHAR* text, OFF beg, OFF max_end, OFF* p_end)
+{
+    int is_contents;
+    OFF off = beg;
+
+    MD_ASSERT(text[off] == _T('&'));
+    off++;
+
+    if(off+2 < max_end  &&  text[off] == _T('#')  &&  (text[off+1] == _T('x') || text[off+1] == _T('X')))
+        is_contents = md_is_hex_entity_contents(ctx, text, off+2, max_end, &off);
+    else if(off+1 < max_end  &&  text[off] == _T('#'))
+        is_contents = md_is_dec_entity_contents(ctx, text, off+1, max_end, &off);
+    else
+        is_contents = md_is_named_entity_contents(ctx, text, off, max_end, &off);
+
+    if(is_contents  &&  off < max_end  &&  text[off] == _T(';')) {
+        *p_end = off+1;
+        return TRUE;
+    } else {
+        return FALSE;
+    }
+}
+
+static inline int
+md_is_entity(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end)
+{
+    return md_is_entity_str(ctx, ctx->text, beg, max_end, p_end);
+}
+
+
+/******************************
+ ***  Attribute Management  ***
+ ******************************/
+
+typedef struct MD_ATTRIBUTE_BUILD_tag MD_ATTRIBUTE_BUILD;
+struct MD_ATTRIBUTE_BUILD_tag {
+    CHAR* text;
+    MD_TEXTTYPE* substr_types;
+    OFF* substr_offsets;
+    int substr_count;
+    int substr_alloc;
+    MD_TEXTTYPE trivial_types[1];
+    OFF trivial_offsets[2];
+};
+
+
+#define MD_BUILD_ATTR_NO_ESCAPES    0x0001
+
+static int
+md_build_attr_append_substr(MD_CTX* ctx, MD_ATTRIBUTE_BUILD* build,
+                            MD_TEXTTYPE type, OFF off)
+{
+    if(build->substr_count >= build->substr_alloc) {
+        MD_TEXTTYPE* new_substr_types;
+        OFF* new_substr_offsets;
+
+        build->substr_alloc = (build->substr_alloc > 0
+                ? build->substr_alloc + build->substr_alloc / 2
+                : 8);
+        new_substr_types = (MD_TEXTTYPE*) realloc(build->substr_types,
+                                    build->substr_alloc * sizeof(MD_TEXTTYPE));
+        if(new_substr_types == NULL) {
+            MD_LOG("realloc() failed.");
+            return -1;
+        }
+        /* Note +1 to reserve space for final offset (== raw_size). */
+        new_substr_offsets = (OFF*) realloc(build->substr_offsets,
+                                    (build->substr_alloc+1) * sizeof(OFF));
+        if(new_substr_offsets == NULL) {
+            MD_LOG("realloc() failed.");
+            free(new_substr_types);
+            return -1;
+        }
+
+        build->substr_types = new_substr_types;
+        build->substr_offsets = new_substr_offsets;
+    }
+
+    build->substr_types[build->substr_count] = type;
+    build->substr_offsets[build->substr_count] = off;
+    build->substr_count++;
+    return 0;
+}
+
+static void
+md_free_attribute(MD_CTX* ctx, MD_ATTRIBUTE_BUILD* build)
+{
+    MD_UNUSED(ctx);
+
+    if(build->substr_alloc > 0) {
+        free(build->text);
+        free(build->substr_types);
+        free(build->substr_offsets);
+    }
+}
+
+static int
+md_build_attribute(MD_CTX* ctx, const CHAR* raw_text, SZ raw_size,
+                   unsigned flags, MD_ATTRIBUTE* attr, MD_ATTRIBUTE_BUILD* build)
+{
+    OFF raw_off, off;
+    int is_trivial;
+    int ret = 0;
+
+    memset(build, 0, sizeof(MD_ATTRIBUTE_BUILD));
+
+    /* If there is no backslash and no ampersand, build trivial attribute
+     * without any malloc(). */
+    is_trivial = TRUE;
+    for(raw_off = 0; raw_off < raw_size; raw_off++) {
+        if(ISANYOF3_(raw_text[raw_off], _T('\\'), _T('&'), _T('\0'))) {
+            is_trivial = FALSE;
+            break;
+        }
+    }
+
+    if(is_trivial) {
+        build->text = (CHAR*) (raw_size ? raw_text : NULL);
+        build->substr_types = build->trivial_types;
+        build->substr_offsets = build->trivial_offsets;
+        build->substr_count = 1;
+        build->substr_alloc = 0;
+        build->trivial_types[0] = MD_TEXT_NORMAL;
+        build->trivial_offsets[0] = 0;
+        build->trivial_offsets[1] = raw_size;
+        off = raw_size;
+    } else {
+        build->text = (CHAR*) malloc(raw_size * sizeof(CHAR));
+        if(build->text == NULL) {
+            MD_LOG("malloc() failed.");
+            goto abort;
+        }
+
+        raw_off = 0;
+        off = 0;
+
+        while(raw_off < raw_size) {
+            if(raw_text[raw_off] == _T('\0')) {
+                MD_CHECK(md_build_attr_append_substr(ctx, build, MD_TEXT_NULLCHAR, off));
+                memcpy(build->text + off, raw_text + raw_off, 1);
+                off++;
+                raw_off++;
+                continue;
+            }
+
+            if(raw_text[raw_off] == _T('&')) {
+                OFF ent_end;
+
+                if(md_is_entity_str(ctx, raw_text, raw_off, raw_size, &ent_end)) {
+                    MD_CHECK(md_build_attr_append_substr(ctx, build, MD_TEXT_ENTITY, off));
+                    memcpy(build->text + off, raw_text + raw_off, ent_end - raw_off);
+                    off += ent_end - raw_off;
+                    raw_off = ent_end;
+                    continue;
+                }
+            }
+
+            if(build->substr_count == 0  ||  build->substr_types[build->substr_count-1] != MD_TEXT_NORMAL)
+                MD_CHECK(md_build_attr_append_substr(ctx, build, MD_TEXT_NORMAL, off));
+
+            if(!(flags & MD_BUILD_ATTR_NO_ESCAPES)  &&
+               raw_text[raw_off] == _T('\\')  &&  raw_off+1 < raw_size  &&
+               (ISPUNCT_(raw_text[raw_off+1]) || ISNEWLINE_(raw_text[raw_off+1])))
+                raw_off++;
+
+            build->text[off++] = raw_text[raw_off++];
+        }
+        build->substr_offsets[build->substr_count] = off;
+    }
+
+    attr->text = build->text;
+    attr->size = off;
+    attr->substr_offsets = build->substr_offsets;
+    attr->substr_types = build->substr_types;
+    return 0;
+
+abort:
+    md_free_attribute(ctx, build);
+    return -1;
+}
+
+
+/*********************************************
+ ***  Dictionary of Reference Definitions  ***
+ *********************************************/
+
+#define MD_FNV1A_BASE       2166136261U
+#define MD_FNV1A_PRIME      16777619U
+
+static inline unsigned
+md_fnv1a(unsigned base, const void* data, size_t n)
+{
+    const unsigned char* buf = (const unsigned char*) data;
+    unsigned hash = base;
+    size_t i;
+
+    for(i = 0; i < n; i++) {
+        hash ^= buf[i];
+        hash *= MD_FNV1A_PRIME;
+    }
+
+    return hash;
+}
+
+
+struct MD_REF_DEF_tag {
+    CHAR* label;
+    CHAR* title;
+    unsigned hash;
+    SZ label_size;
+    SZ title_size;
+    OFF dest_beg;
+    OFF dest_end;
+    unsigned char label_needs_free : 1;
+    unsigned char title_needs_free : 1;
+};
+
+/* Label equivalence is quite complicated with regards to whitespace and case
+ * folding. This complicates computing a hash of it as well as direct comparison
+ * of two labels. */
+
+static unsigned
+md_link_label_hash(const CHAR* label, SZ size)
+{
+    unsigned hash = MD_FNV1A_BASE;
+    OFF off;
+    unsigned codepoint;
+    int is_whitespace = FALSE;
+
+    off = md_skip_unicode_whitespace(label, 0, size);
+    while(off < size) {
+        SZ char_size;
+
+        codepoint = md_decode_unicode(label, off, size, &char_size);
+        is_whitespace = ISUNICODEWHITESPACE_(codepoint) || ISNEWLINE_(label[off]);
+
+        if(is_whitespace) {
+            codepoint = ' ';
+            hash = md_fnv1a(hash, &codepoint, sizeof(unsigned));
+            off = md_skip_unicode_whitespace(label, off, size);
+        } else {
+            MD_UNICODE_FOLD_INFO fold_info;
+
+            md_get_unicode_fold_info(codepoint, &fold_info);
+            hash = md_fnv1a(hash, fold_info.codepoints, fold_info.n_codepoints * sizeof(unsigned));
+            off += char_size;
+        }
+    }
+
+    return hash;
+}
+
+static OFF
+md_link_label_cmp_load_fold_info(const CHAR* label, OFF off, SZ size,
+                                 MD_UNICODE_FOLD_INFO* fold_info)
+{
+    unsigned codepoint;
+    SZ char_size;
+
+    if(off >= size) {
+        /* Treat end of a link label as a whitespace. */
+        goto whitespace;
+    }
+
+    codepoint = md_decode_unicode(label, off, size, &char_size);
+    off += char_size;
+    if(ISUNICODEWHITESPACE_(codepoint)) {
+        /* Treat all whitespace as equivalent */
+        goto whitespace;
+    }
+
+    /* Get real folding info. */
+    md_get_unicode_fold_info(codepoint, fold_info);
+    return off;
+
+whitespace:
+    fold_info->codepoints[0] = _T(' ');
+    fold_info->n_codepoints = 1;
+    return md_skip_unicode_whitespace(label, off, size);
+}
+
+static int
+md_link_label_cmp(const CHAR* a_label, SZ a_size, const CHAR* b_label, SZ b_size)
+{
+    OFF a_off;
+    OFF b_off;
+    MD_UNICODE_FOLD_INFO a_fi = { { 0 }, 0 };
+    MD_UNICODE_FOLD_INFO b_fi = { { 0 }, 0 };
+    OFF a_fi_off = 0;
+    OFF b_fi_off = 0;
+    int cmp;
+
+    a_off = md_skip_unicode_whitespace(a_label, 0, a_size);
+    b_off = md_skip_unicode_whitespace(b_label, 0, b_size);
+    while(a_off < a_size || a_fi_off < a_fi.n_codepoints ||
+          b_off < b_size || b_fi_off < b_fi.n_codepoints)
+    {
+        /* If needed, load fold info for next char. */
+        if(a_fi_off >= a_fi.n_codepoints) {
+            a_fi_off = 0;
+            a_off = md_link_label_cmp_load_fold_info(a_label, a_off, a_size, &a_fi);
+        }
+        if(b_fi_off >= b_fi.n_codepoints) {
+            b_fi_off = 0;
+            b_off = md_link_label_cmp_load_fold_info(b_label, b_off, b_size, &b_fi);
+        }
+
+        cmp = b_fi.codepoints[b_fi_off] - a_fi.codepoints[a_fi_off];
+        if(cmp != 0)
+            return cmp;
+
+        a_fi_off++;
+        b_fi_off++;
+    }
+
+    return 0;
+}
+
+typedef struct MD_REF_DEF_LIST_tag MD_REF_DEF_LIST;
+struct MD_REF_DEF_LIST_tag {
+    int n_ref_defs;
+    int alloc_ref_defs;
+    MD_REF_DEF* ref_defs[];  /* Valid items always  point into ctx->ref_defs[] */
+};
+
+static int
+md_ref_def_cmp(const void* a, const void* b)
+{
+    const MD_REF_DEF* a_ref = *(const MD_REF_DEF**)a;
+    const MD_REF_DEF* b_ref = *(const MD_REF_DEF**)b;
+
+    if(a_ref->hash < b_ref->hash)
+        return -1;
+    else if(a_ref->hash > b_ref->hash)
+        return +1;
+    else
+        return md_link_label_cmp(a_ref->label, a_ref->label_size, b_ref->label, b_ref->label_size);
+}
+
+static int
+md_ref_def_cmp_for_sort(const void* a, const void* b)
+{
+    int cmp;
+
+    cmp = md_ref_def_cmp(a, b);
+
+    /* Ensure stability of the sorting. */
+    if(cmp == 0) {
+        const MD_REF_DEF* a_ref = *(const MD_REF_DEF**)a;
+        const MD_REF_DEF* b_ref = *(const MD_REF_DEF**)b;
+
+        if(a_ref < b_ref)
+            cmp = -1;
+        else if(a_ref > b_ref)
+            cmp = +1;
+        else
+            cmp = 0;
+    }
+
+    return cmp;
+}
+
+static int
+md_build_ref_def_hashtable(MD_CTX* ctx)
+{
+    int i, j;
+
+    if(ctx->n_ref_defs == 0)
+        return 0;
+
+    ctx->ref_def_hashtable_size = (ctx->n_ref_defs * 5) / 4;
+    ctx->ref_def_hashtable = malloc(ctx->ref_def_hashtable_size * sizeof(void*));
+    if(ctx->ref_def_hashtable == NULL) {
+        MD_LOG("malloc() failed.");
+        goto abort;
+    }
+    memset(ctx->ref_def_hashtable, 0, ctx->ref_def_hashtable_size * sizeof(void*));
+
+    /* Each member of ctx->ref_def_hashtable[] can be:
+     *  -- NULL,
+     *  -- pointer to the MD_REF_DEF in ctx->ref_defs[], or
+     *  -- pointer to a MD_REF_DEF_LIST, which holds multiple pointers to
+     *     such MD_REF_DEFs.
+     */
+    for(i = 0; i < ctx->n_ref_defs; i++) {
+        MD_REF_DEF* def = &ctx->ref_defs[i];
+        void* bucket;
+        MD_REF_DEF_LIST* list;
+
+        def->hash = md_link_label_hash(def->label, def->label_size);
+        bucket = ctx->ref_def_hashtable[def->hash % ctx->ref_def_hashtable_size];
+
+        if(bucket == NULL) {
+            /* The bucket is empty. Make it just point to the def. */
+            ctx->ref_def_hashtable[def->hash % ctx->ref_def_hashtable_size] = def;
+            continue;
+        }
+
+        if(ctx->ref_defs <= (MD_REF_DEF*) bucket  &&  (MD_REF_DEF*) bucket < ctx->ref_defs + ctx->n_ref_defs) {
+            /* The bucket already contains one ref. def. Lets see whether it
+             * is the same label (ref. def. duplicate) or different one
+             * (hash conflict). */
+            MD_REF_DEF* old_def = (MD_REF_DEF*) bucket;
+
+            if(md_link_label_cmp(def->label, def->label_size, old_def->label, old_def->label_size) == 0) {
+                /* Duplicate label: Ignore this ref. def. */
+                continue;
+            }
+
+            /* Make the bucket complex, i.e. able to hold more ref. defs. */
+            list = (MD_REF_DEF_LIST*) malloc(sizeof(MD_REF_DEF_LIST) + 2 * sizeof(MD_REF_DEF*));
+            if(list == NULL) {
+                MD_LOG("malloc() failed.");
+                goto abort;
+            }
+            list->ref_defs[0] = old_def;
+            list->ref_defs[1] = def;
+            list->n_ref_defs = 2;
+            list->alloc_ref_defs = 2;
+            ctx->ref_def_hashtable[def->hash % ctx->ref_def_hashtable_size] = list;
+            continue;
+        }
+
+        /* Append the def to the complex bucket list.
+         *
+         * Note in this case we ignore potential duplicates to avoid expensive
+         * iterating over the complex bucket. Below, we revisit all the complex
+         * buckets and handle it more cheaply after the complex bucket contents
+         * is sorted. */
+        list = (MD_REF_DEF_LIST*) bucket;
+        if(list->n_ref_defs >= list->alloc_ref_defs) {
+            int alloc_ref_defs = list->alloc_ref_defs + list->alloc_ref_defs / 2;
+            MD_REF_DEF_LIST* list_tmp = (MD_REF_DEF_LIST*) realloc(list,
+                        sizeof(MD_REF_DEF_LIST) + alloc_ref_defs * sizeof(MD_REF_DEF*));
+            if(list_tmp == NULL) {
+                MD_LOG("realloc() failed.");
+                goto abort;
+            }
+            list = list_tmp;
+            list->alloc_ref_defs = alloc_ref_defs;
+            ctx->ref_def_hashtable[def->hash % ctx->ref_def_hashtable_size] = list;
+        }
+
+        list->ref_defs[list->n_ref_defs] = def;
+        list->n_ref_defs++;
+    }
+
+    /* Sort the complex buckets so we can use bsearch() with them. */
+    for(i = 0; i < ctx->ref_def_hashtable_size; i++) {
+        void* bucket = ctx->ref_def_hashtable[i];
+        MD_REF_DEF_LIST* list;
+
+        if(bucket == NULL)
+            continue;
+        if(ctx->ref_defs <= (MD_REF_DEF*) bucket  &&  (MD_REF_DEF*) bucket < ctx->ref_defs + ctx->n_ref_defs)
+            continue;
+
+        list = (MD_REF_DEF_LIST*) bucket;
+        qsort(list->ref_defs, list->n_ref_defs, sizeof(MD_REF_DEF*), md_ref_def_cmp_for_sort);
+
+        /* Disable all duplicates in the complex bucket by forcing all such
+         * records to point to the 1st such ref. def. I.e. no matter which
+         * record is found during the lookup, it will always point to the right
+         * ref. def. in ctx->ref_defs[]. */
+        for(j = 1; j < list->n_ref_defs; j++) {
+            if(md_ref_def_cmp(&list->ref_defs[j-1], &list->ref_defs[j]) == 0)
+                list->ref_defs[j] = list->ref_defs[j-1];
+        }
+    }
+
+    return 0;
+
+abort:
+    return -1;
+}
+
+static void
+md_free_ref_def_hashtable(MD_CTX* ctx)
+{
+    if(ctx->ref_def_hashtable != NULL) {
+        int i;
+
+        for(i = 0; i < ctx->ref_def_hashtable_size; i++) {
+            void* bucket = ctx->ref_def_hashtable[i];
+            if(bucket == NULL)
+                continue;
+            if(ctx->ref_defs <= (MD_REF_DEF*) bucket  &&  (MD_REF_DEF*) bucket < ctx->ref_defs + ctx->n_ref_defs)
+                continue;
+            free(bucket);
+        }
+
+        free(ctx->ref_def_hashtable);
+    }
+}
+
+static const MD_REF_DEF*
+md_lookup_ref_def(MD_CTX* ctx, const CHAR* label, SZ label_size)
+{
+    unsigned hash;
+    void* bucket;
+
+    if(ctx->ref_def_hashtable_size == 0)
+        return NULL;
+
+    hash = md_link_label_hash(label, label_size);
+    bucket = ctx->ref_def_hashtable[hash % ctx->ref_def_hashtable_size];
+
+    if(bucket == NULL) {
+        return NULL;
+    } else if(ctx->ref_defs <= (MD_REF_DEF*) bucket  &&  (MD_REF_DEF*) bucket < ctx->ref_defs + ctx->n_ref_defs) {
+        const MD_REF_DEF* def = (MD_REF_DEF*) bucket;
+
+        if(md_link_label_cmp(def->label, def->label_size, label, label_size) == 0)
+            return def;
+        else
+            return NULL;
+    } else {
+        MD_REF_DEF_LIST* list = (MD_REF_DEF_LIST*) bucket;
+        MD_REF_DEF key_buf;
+        const MD_REF_DEF* key = &key_buf;
+        const MD_REF_DEF** ret;
+
+        key_buf.label = (CHAR*) label;
+        key_buf.label_size = label_size;
+        key_buf.hash = md_link_label_hash(key_buf.label, key_buf.label_size);
+
+        ret = (const MD_REF_DEF**) bsearch(&key, list->ref_defs,
+                    list->n_ref_defs, sizeof(MD_REF_DEF*), md_ref_def_cmp);
+        if(ret != NULL)
+            return *ret;
+        else
+            return NULL;
+    }
+}
+
+
+/***************************
+ ***  Recognizing Links  ***
+ ***************************/
+
+/* Note this code is partially shared between processing inlines and blocks
+ * as reference definitions and links share some helper parser functions.
+ */
+
+typedef struct MD_LINK_ATTR_tag MD_LINK_ATTR;
+struct MD_LINK_ATTR_tag {
+    OFF dest_beg;
+    OFF dest_end;
+
+    CHAR* title;
+    SZ title_size;
+    int title_needs_free;
+};
+
+
+static int
+md_is_link_label(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg,
+                 OFF* p_end, int* p_beg_line_index, int* p_end_line_index,
+                 OFF* p_contents_beg, OFF* p_contents_end)
+{
+    OFF off = beg;
+    OFF contents_beg = 0;
+    OFF contents_end = 0;
+    int line_index = 0;
+    int len = 0;
+
+    if(CH(off) != _T('['))
+        return FALSE;
+    off++;
+
+    while(1) {
+        OFF line_end = lines[line_index].end;
+
+        while(off < line_end) {
+            if(CH(off) == _T('\\')  &&  off+1 < ctx->size  &&  (ISPUNCT(off+1) || ISNEWLINE(off+1))) {
+                if(contents_end == 0) {
+                    contents_beg = off;
+                    *p_beg_line_index = line_index;
+                }
+                contents_end = off + 2;
+                off += 2;
+            } else if(CH(off) == _T('[')) {
+                return FALSE;
+            } else if(CH(off) == _T(']')) {
+                if(contents_beg < contents_end) {
+                    /* Success. */
+                    *p_contents_beg = contents_beg;
+                    *p_contents_end = contents_end;
+                    *p_end = off+1;
+                    *p_end_line_index = line_index;
+                    return TRUE;
+                } else {
+                    /* Link label must have some non-whitespace contents. */
+                    return FALSE;
+                }
+            } else {
+                unsigned codepoint;
+                SZ char_size;
+
+                codepoint = md_decode_unicode(ctx->text, off, ctx->size, &char_size);
+                if(!ISUNICODEWHITESPACE_(codepoint)) {
+                    if(contents_end == 0) {
+                        contents_beg = off;
+                        *p_beg_line_index = line_index;
+                    }
+                    contents_end = off + char_size;
+                }
+
+                off += char_size;
+            }
+
+            len++;
+            if(len > 999)
+                return FALSE;
+        }
+
+        line_index++;
+        len++;
+        if(line_index < n_lines)
+            off = lines[line_index].beg;
+        else
+            break;
+    }
+
+    return FALSE;
+}
+
+static int
+md_is_link_destination_A(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end,
+                         OFF* p_contents_beg, OFF* p_contents_end)
+{
+    OFF off = beg;
+
+    if(off >= max_end  ||  CH(off) != _T('<'))
+        return FALSE;
+    off++;
+
+    while(off < max_end) {
+        if(CH(off) == _T('\\')  &&  off+1 < max_end  &&  ISPUNCT(off+1)) {
+            off += 2;
+            continue;
+        }
+
+        if(ISNEWLINE(off)  ||  CH(off) == _T('<'))
+            return FALSE;
+
+        if(CH(off) == _T('>')) {
+            /* Success. */
+            *p_contents_beg = beg+1;
+            *p_contents_end = off;
+            *p_end = off+1;
+            return TRUE;
+        }
+
+        off++;
+    }
+
+    return FALSE;
+}
+
+static int
+md_is_link_destination_B(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end,
+                         OFF* p_contents_beg, OFF* p_contents_end)
+{
+    OFF off = beg;
+    int parenthesis_level = 0;
+
+    while(off < max_end) {
+        if(CH(off) == _T('\\')  &&  off+1 < max_end  &&  ISPUNCT(off+1)) {
+            off += 2;
+            continue;
+        }
+
+        if(ISWHITESPACE(off) || ISCNTRL(off))
+            break;
+
+        /* Link destination may include balanced pairs of unescaped '(' ')'.
+         * Note we limit the maximal nesting level by 32 to protect us from
+         * https://github.com/jgm/cmark/issues/214 */
+        if(CH(off) == _T('(')) {
+            parenthesis_level++;
+            if(parenthesis_level > 32)
+                return FALSE;
+        } else if(CH(off) == _T(')')) {
+            if(parenthesis_level == 0)
+                break;
+            parenthesis_level--;
+        }
+
+        off++;
+    }
+
+    if(parenthesis_level != 0  ||  off == beg)
+        return FALSE;
+
+    /* Success. */
+    *p_contents_beg = beg;
+    *p_contents_end = off;
+    *p_end = off;
+    return TRUE;
+}
+
+static inline int
+md_is_link_destination(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end,
+                       OFF* p_contents_beg, OFF* p_contents_end)
+{
+    if(CH(beg) == _T('<'))
+        return md_is_link_destination_A(ctx, beg, max_end, p_end, p_contents_beg, p_contents_end);
+    else
+        return md_is_link_destination_B(ctx, beg, max_end, p_end, p_contents_beg, p_contents_end);
+}
+
+static int
+md_is_link_title(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg,
+                 OFF* p_end, int* p_beg_line_index, int* p_end_line_index,
+                 OFF* p_contents_beg, OFF* p_contents_end)
+{
+    OFF off = beg;
+    CHAR closer_char;
+    int line_index = 0;
+
+    /* White space with up to one line break. */
+    while(off < lines[line_index].end  &&  ISWHITESPACE(off))
+        off++;
+    if(off >= lines[line_index].end) {
+        line_index++;
+        if(line_index >= n_lines)
+            return FALSE;
+        off = lines[line_index].beg;
+    }
+    if(off == beg)
+        return FALSE;
+
+    *p_beg_line_index = line_index;
+
+    /* First char determines how to detect end of it. */
+    switch(CH(off)) {
+        case _T('"'):   closer_char = _T('"'); break;
+        case _T('\''):  closer_char = _T('\''); break;
+        case _T('('):   closer_char = _T(')'); break;
+        default:        return FALSE;
+    }
+    off++;
+
+    *p_contents_beg = off;
+
+    while(line_index < n_lines) {
+        OFF line_end = lines[line_index].end;
+
+        while(off < line_end) {
+            if(CH(off) == _T('\\')  &&  off+1 < ctx->size  &&  (ISPUNCT(off+1) || ISNEWLINE(off+1))) {
+                off++;
+            } else if(CH(off) == closer_char) {
+                /* Success. */
+                *p_contents_end = off;
+                *p_end = off+1;
+                *p_end_line_index = line_index;
+                return TRUE;
+            } else if(closer_char == _T(')')  &&  CH(off) == _T('(')) {
+                /* ()-style title cannot contain (unescaped '(')) */
+                return FALSE;
+            }
+
+            off++;
+        }
+
+        line_index++;
+    }
+
+    return FALSE;
+}
+
+/* Returns 0 if it is not a reference definition.
+ *
+ * Returns N > 0 if it is a reference definition. N then corresponds to the
+ * number of lines forming it). In this case the definition is stored for
+ * resolving any links referring to it.
+ *
+ * Returns -1 in case of an error (out of memory).
+ */
+static int
+md_is_link_reference_definition(MD_CTX* ctx, const MD_LINE* lines, int n_lines)
+{
+    OFF label_contents_beg;
+    OFF label_contents_end;
+    int label_contents_line_index = -1;
+    int label_is_multiline = FALSE;
+    OFF dest_contents_beg;
+    OFF dest_contents_end;
+    OFF title_contents_beg;
+    OFF title_contents_end;
+    int title_contents_line_index;
+    int title_is_multiline = FALSE;
+    OFF off;
+    int line_index = 0;
+    int tmp_line_index;
+    MD_REF_DEF* def = NULL;
+    int ret = 0;
+
+    /* Link label. */
+    if(!md_is_link_label(ctx, lines, n_lines, lines[0].beg,
+                &off, &label_contents_line_index, &line_index,
+                &label_contents_beg, &label_contents_end))
+        return FALSE;
+    label_is_multiline = (label_contents_line_index != line_index);
+
+    /* Colon. */
+    if(off >= lines[line_index].end  ||  CH(off) != _T(':'))
+        return FALSE;
+    off++;
+
+    /* Optional white space with up to one line break. */
+    while(off < lines[line_index].end  &&  ISWHITESPACE(off))
+        off++;
+    if(off >= lines[line_index].end) {
+        line_index++;
+        if(line_index >= n_lines)
+            return FALSE;
+        off = lines[line_index].beg;
+    }
+
+    /* Link destination. */
+    if(!md_is_link_destination(ctx, off, lines[line_index].end,
+                &off, &dest_contents_beg, &dest_contents_end))
+        return FALSE;
+
+    /* (Optional) title. Note we interpret it as an title only if nothing
+     * more follows on its last line. */
+    if(md_is_link_title(ctx, lines + line_index, n_lines - line_index, off,
+                &off, &title_contents_line_index, &tmp_line_index,
+                &title_contents_beg, &title_contents_end)
+        &&  off >= lines[line_index + tmp_line_index].end)
+    {
+        title_is_multiline = (tmp_line_index != title_contents_line_index);
+        title_contents_line_index += line_index;
+        line_index += tmp_line_index;
+    } else {
+        /* Not a title. */
+        title_is_multiline = FALSE;
+        title_contents_beg = off;
+        title_contents_end = off;
+        title_contents_line_index = 0;
+    }
+
+    /* Nothing more can follow on the last line. */
+    if(off < lines[line_index].end)
+        return FALSE;
+
+    /* So, it _is_ a reference definition. Remember it. */
+    if(ctx->n_ref_defs >= ctx->alloc_ref_defs) {
+        MD_REF_DEF* new_defs;
+
+        ctx->alloc_ref_defs = (ctx->alloc_ref_defs > 0
+                ? ctx->alloc_ref_defs + ctx->alloc_ref_defs / 2
+                : 16);
+        new_defs = (MD_REF_DEF*) realloc(ctx->ref_defs, ctx->alloc_ref_defs * sizeof(MD_REF_DEF));
+        if(new_defs == NULL) {
+            MD_LOG("realloc() failed.");
+            goto abort;
+        }
+
+        ctx->ref_defs = new_defs;
+    }
+    def = &ctx->ref_defs[ctx->n_ref_defs];
+    memset(def, 0, sizeof(MD_REF_DEF));
+
+    if(label_is_multiline) {
+        MD_CHECK(md_merge_lines_alloc(ctx, label_contents_beg, label_contents_end,
+                    lines + label_contents_line_index, n_lines - label_contents_line_index,
+                    _T(' '), &def->label, &def->label_size));
+        def->label_needs_free = TRUE;
+    } else {
+        def->label = (CHAR*) STR(label_contents_beg);
+        def->label_size = label_contents_end - label_contents_beg;
+    }
+
+    if(title_is_multiline) {
+        MD_CHECK(md_merge_lines_alloc(ctx, title_contents_beg, title_contents_end,
+                    lines + title_contents_line_index, n_lines - title_contents_line_index,
+                    _T('\n'), &def->title, &def->title_size));
+        def->title_needs_free = TRUE;
+    } else {
+        def->title = (CHAR*) STR(title_contents_beg);
+        def->title_size = title_contents_end - title_contents_beg;
+    }
+
+    def->dest_beg = dest_contents_beg;
+    def->dest_end = dest_contents_end;
+
+    /* Success. */
+    ctx->n_ref_defs++;
+    return line_index + 1;
+
+abort:
+    /* Failure. */
+    if(def != NULL  &&  def->label_needs_free)
+        free(def->label);
+    if(def != NULL  &&  def->title_needs_free)
+        free(def->title);
+    return ret;
+}
+
+static int
+md_is_link_reference(MD_CTX* ctx, const MD_LINE* lines, int n_lines,
+                     OFF beg, OFF end, MD_LINK_ATTR* attr)
+{
+    const MD_REF_DEF* def;
+    const MD_LINE* beg_line;
+    const MD_LINE* end_line;
+    CHAR* label;
+    SZ label_size;
+    int ret;
+
+    MD_ASSERT(CH(beg) == _T('[') || CH(beg) == _T('!'));
+    MD_ASSERT(CH(end-1) == _T(']'));
+
+    beg += (CH(beg) == _T('!') ? 2 : 1);
+    end--;
+
+    /* Find lines corresponding to the beg and end positions. */
+    MD_ASSERT(lines[0].beg <= beg);
+    beg_line = lines;
+    while(beg >= beg_line->end)
+        beg_line++;
+
+    MD_ASSERT(end <= lines[n_lines-1].end);
+    end_line = beg_line;
+    while(end >= end_line->end)
+        end_line++;
+
+    if(beg_line != end_line) {
+        MD_CHECK(md_merge_lines_alloc(ctx, beg, end, beg_line,
+                 (int)(n_lines - (beg_line - lines)), _T(' '), &label, &label_size));
+    } else {
+        label = (CHAR*) STR(beg);
+        label_size = end - beg;
+    }
+
+    def = md_lookup_ref_def(ctx, label, label_size);
+    if(def != NULL) {
+        attr->dest_beg = def->dest_beg;
+        attr->dest_end = def->dest_end;
+        attr->title = def->title;
+        attr->title_size = def->title_size;
+        attr->title_needs_free = FALSE;
+    }
+
+    if(beg_line != end_line)
+        free(label);
+
+    ret = (def != NULL);
+
+abort:
+    return ret;
+}
+
+static int
+md_is_inline_link_spec(MD_CTX* ctx, const MD_LINE* lines, int n_lines,
+                       OFF beg, OFF* p_end, MD_LINK_ATTR* attr)
+{
+    int line_index = 0;
+    int tmp_line_index;
+    OFF title_contents_beg;
+    OFF title_contents_end;
+    int title_contents_line_index;
+    int title_is_multiline;
+    OFF off = beg;
+    int ret = FALSE;
+
+    while(off >= lines[line_index].end)
+        line_index++;
+
+    MD_ASSERT(CH(off) == _T('('));
+    off++;
+
+    /* Optional white space with up to one line break. */
+    while(off < lines[line_index].end  &&  ISWHITESPACE(off))
+        off++;
+    if(off >= lines[line_index].end  &&  ISNEWLINE(off)) {
+        line_index++;
+        if(line_index >= n_lines)
+            return FALSE;
+        off = lines[line_index].beg;
+    }
+
+    /* Link destination may be omitted, but only when not also having a title. */
+    if(off < ctx->size  &&  CH(off) == _T(')')) {
+        attr->dest_beg = off;
+        attr->dest_end = off;
+        attr->title = NULL;
+        attr->title_size = 0;
+        attr->title_needs_free = FALSE;
+        off++;
+        *p_end = off;
+        return TRUE;
+    }
+
+    /* Link destination. */
+    if(!md_is_link_destination(ctx, off, lines[line_index].end,
+                        &off, &attr->dest_beg, &attr->dest_end))
+        return FALSE;
+
+    /* (Optional) title. */
+    if(md_is_link_title(ctx, lines + line_index, n_lines - line_index, off,
+                &off, &title_contents_line_index, &tmp_line_index,
+                &title_contents_beg, &title_contents_end))
+    {
+        title_is_multiline = (tmp_line_index != title_contents_line_index);
+        title_contents_line_index += line_index;
+        line_index += tmp_line_index;
+    } else {
+        /* Not a title. */
+        title_is_multiline = FALSE;
+        title_contents_beg = off;
+        title_contents_end = off;
+        title_contents_line_index = 0;
+    }
+
+    /* Optional whitespace followed with final ')'. */
+    while(off < lines[line_index].end  &&  ISWHITESPACE(off))
+        off++;
+    if(off >= lines[line_index].end  &&  ISNEWLINE(off)) {
+        line_index++;
+        if(line_index >= n_lines)
+            return FALSE;
+        off = lines[line_index].beg;
+    }
+    if(CH(off) != _T(')'))
+        goto abort;
+    off++;
+
+    if(title_contents_beg >= title_contents_end) {
+        attr->title = NULL;
+        attr->title_size = 0;
+        attr->title_needs_free = FALSE;
+    } else if(!title_is_multiline) {
+        attr->title = (CHAR*) STR(title_contents_beg);
+        attr->title_size = title_contents_end - title_contents_beg;
+        attr->title_needs_free = FALSE;
+    } else {
+        MD_CHECK(md_merge_lines_alloc(ctx, title_contents_beg, title_contents_end,
+                    lines + title_contents_line_index, n_lines - title_contents_line_index,
+                    _T('\n'), &attr->title, &attr->title_size));
+        attr->title_needs_free = TRUE;
+    }
+
+    *p_end = off;
+    ret = TRUE;
+
+abort:
+    return ret;
+}
+
+static void
+md_free_ref_defs(MD_CTX* ctx)
+{
+    int i;
+
+    for(i = 0; i < ctx->n_ref_defs; i++) {
+        MD_REF_DEF* def = &ctx->ref_defs[i];
+
+        if(def->label_needs_free)
+            free(def->label);
+        if(def->title_needs_free)
+            free(def->title);
+    }
+
+    free(ctx->ref_defs);
+}
+
+
+/******************************************
+ ***  Processing Inlines (a.k.a Spans)  ***
+ ******************************************/
+
+/* We process inlines in few phases:
+ *
+ * (1) We go through the block text and collect all significant characters
+ *     which may start/end a span or some other significant position into
+ *     ctx->marks[]. Core of this is what md_collect_marks() does.
+ *
+ *     We also do some very brief preliminary context-less analysis, whether
+ *     it might be opener or closer (e.g. of an emphasis span).
+ *
+ *     This speeds the other steps as we do not need to re-iterate over all
+ *     characters anymore.
+ *
+ * (2) We analyze each potential mark types, in order by their precedence.
+ *
+ *     In each md_analyze_XXX() function, we re-iterate list of the marks,
+ *     skipping already resolved regions (in preceding precedences) and try to
+ *     resolve them.
+ *
+ * (2.1) For trivial marks, which are single (e.g. HTML entity), we just mark
+ *       them as resolved.
+ *
+ * (2.2) For range-type marks, we analyze whether the mark could be closer
+ *       and, if yes, whether there is some preceding opener it could satisfy.
+ *
+ *       If not we check whether it could be really an opener and if yes, we
+ *       remember it so subsequent closers may resolve it.
+ *
+ * (3) Finally, when all marks were analyzed, we render the block contents
+ *     by calling MD_RENDERER::text() callback, interrupting by ::enter_span()
+ *     or ::close_span() whenever we reach a resolved mark.
+ */
+
+
+/* The mark structure.
+ *
+ * '\\': Maybe escape sequence.
+ * '\0': NULL char.
+ *  '*': Maybe (strong) emphasis start/end.
+ *  '_': Maybe (strong) emphasis start/end.
+ *  '~': Maybe strikethrough start/end (needs MD_FLAG_STRIKETHROUGH).
+ *  '`': Maybe code span start/end.
+ *  '&': Maybe start of entity.
+ *  ';': Maybe end of entity.
+ *  '<': Maybe start of raw HTML or autolink.
+ *  '>': Maybe end of raw HTML or autolink.
+ *  '[': Maybe start of link label or link text.
+ *  '!': Equivalent of '[' for image.
+ *  ']': Maybe end of link label or link text.
+ *  '@': Maybe permissive e-mail auto-link (needs MD_FLAG_PERMISSIVEEMAILAUTOLINKS).
+ *  ':': Maybe permissive URL auto-link (needs MD_FLAG_PERMISSIVEURLAUTOLINKS).
+ *  '.': Maybe permissive WWW auto-link (needs MD_FLAG_PERMISSIVEWWWAUTOLINKS).
+ *  'D': Dummy mark, it reserves a space for splitting a previous mark
+ *       (e.g. emphasis) or to make more space for storing some special data
+ *       related to the preceding mark (e.g. link).
+ *
+ * Note that not all instances of these chars in the text imply creation of the
+ * structure. Only those which have (or may have, after we see more context)
+ * the special meaning.
+ *
+ * (Keep this struct as small as possible to fit as much of them into CPU
+ * cache line.)
+ */
+struct MD_MARK_tag {
+    OFF beg;
+    OFF end;
+
+    /* For unresolved openers, 'prev' and 'next' form the chain of open openers
+     * of given type 'ch'.
+     *
+     * During resolving, we disconnect from the chain and point to the
+     * corresponding counterpart so opener points to its closer and vice versa.
+     */
+    int prev;
+    int next;
+    CHAR ch;
+    unsigned char flags;
+};
+
+/* Mark flags (these apply to ALL mark types). */
+#define MD_MARK_POTENTIAL_OPENER            0x01  /* Maybe opener. */
+#define MD_MARK_POTENTIAL_CLOSER            0x02  /* Maybe closer. */
+#define MD_MARK_OPENER                      0x04  /* Definitely opener. */
+#define MD_MARK_CLOSER                      0x08  /* Definitely closer. */
+#define MD_MARK_RESOLVED                    0x10  /* Resolved in any definite way. */
+
+/* Mark flags specific for various mark types (so they can share bits). */
+#define MD_MARK_EMPH_INTRAWORD              0x20  /* Helper for the "rule of 3". */
+#define MD_MARK_EMPH_MOD3_0                 0x40
+#define MD_MARK_EMPH_MOD3_1                 0x80
+#define MD_MARK_EMPH_MOD3_2                 (0x40 | 0x80)
+#define MD_MARK_EMPH_MOD3_MASK              (0x40 | 0x80)
+#define MD_MARK_AUTOLINK                    0x20  /* Distinguisher for '<', '>'. */
+#define MD_MARK_VALIDPERMISSIVEAUTOLINK     0x20  /* For permissive autolinks. */
+
+static MD_MARKCHAIN*
+md_asterisk_chain(MD_CTX* ctx, unsigned flags)
+{
+    switch(flags & (MD_MARK_EMPH_INTRAWORD | MD_MARK_EMPH_MOD3_MASK)) {
+        case MD_MARK_EMPH_INTRAWORD | MD_MARK_EMPH_MOD3_0:  return &ASTERISK_OPENERS_intraword_mod3_0;
+        case MD_MARK_EMPH_INTRAWORD | MD_MARK_EMPH_MOD3_1:  return &ASTERISK_OPENERS_intraword_mod3_1;
+        case MD_MARK_EMPH_INTRAWORD | MD_MARK_EMPH_MOD3_2:  return &ASTERISK_OPENERS_intraword_mod3_2;
+        case MD_MARK_EMPH_MOD3_0:                           return &ASTERISK_OPENERS_extraword_mod3_0;
+        case MD_MARK_EMPH_MOD3_1:                           return &ASTERISK_OPENERS_extraword_mod3_1;
+        case MD_MARK_EMPH_MOD3_2:                           return &ASTERISK_OPENERS_extraword_mod3_2;
+        default:                                            MD_UNREACHABLE();
+    }
+    return NULL;
+}
+
+static MD_MARKCHAIN*
+md_mark_chain(MD_CTX* ctx, int mark_index)
+{
+    MD_MARK* mark = &ctx->marks[mark_index];
+
+    switch(mark->ch) {
+        case _T('*'):   return md_asterisk_chain(ctx, mark->flags);
+        case _T('_'):   return &UNDERSCORE_OPENERS;
+        case _T('~'):   return (mark->end - mark->beg == 1) ? &TILDE_OPENERS_1 : &TILDE_OPENERS_2;
+        case _T('['):   return &BRACKET_OPENERS;
+        case _T('|'):   return &TABLECELLBOUNDARIES;
+        default:        return NULL;
+    }
+}
+
+static MD_MARK*
+md_push_mark(MD_CTX* ctx)
+{
+    if(ctx->n_marks >= ctx->alloc_marks) {
+        MD_MARK* new_marks;
+
+        ctx->alloc_marks = (ctx->alloc_marks > 0
+                ? ctx->alloc_marks + ctx->alloc_marks / 2
+                : 64);
+        new_marks = realloc(ctx->marks, ctx->alloc_marks * sizeof(MD_MARK));
+        if(new_marks == NULL) {
+            MD_LOG("realloc() failed.");
+            return NULL;
+        }
+
+        ctx->marks = new_marks;
+    }
+
+    return &ctx->marks[ctx->n_marks++];
+}
+
+#define PUSH_MARK_()                                                    \
+        do {                                                            \
+            mark = md_push_mark(ctx);                                   \
+            if(mark == NULL) {                                          \
+                ret = -1;                                               \
+                goto abort;                                             \
+            }                                                           \
+        } while(0)
+
+#define PUSH_MARK(ch_, beg_, end_, flags_)                              \
+        do {                                                            \
+            PUSH_MARK_();                                               \
+            mark->beg = (beg_);                                         \
+            mark->end = (end_);                                         \
+            mark->prev = -1;                                            \
+            mark->next = -1;                                            \
+            mark->ch = (char)(ch_);                                     \
+            mark->flags = (flags_);                                     \
+        } while(0)
+
+
+static void
+md_mark_chain_append(MD_CTX* ctx, MD_MARKCHAIN* chain, int mark_index)
+{
+    if(chain->tail >= 0)
+        ctx->marks[chain->tail].next = mark_index;
+    else
+        chain->head = mark_index;
+
+    ctx->marks[mark_index].prev = chain->tail;
+    ctx->marks[mark_index].next = -1;
+    chain->tail = mark_index;
+}
+
+/* Sometimes, we need to store a pointer into the mark. It is quite rare
+ * so we do not bother to make MD_MARK use union, and it can only happen
+ * for dummy marks. */
+static inline void
+md_mark_store_ptr(MD_CTX* ctx, int mark_index, void* ptr)
+{
+    MD_MARK* mark = &ctx->marks[mark_index];
+    MD_ASSERT(mark->ch == 'D');
+
+    /* Check only members beg and end are misused for this. */
+    MD_ASSERT(sizeof(void*) <= 2 * sizeof(OFF));
+    memcpy(mark, &ptr, sizeof(void*));
+}
+
+static inline void*
+md_mark_get_ptr(MD_CTX* ctx, int mark_index)
+{
+    void* ptr;
+    MD_MARK* mark = &ctx->marks[mark_index];
+    MD_ASSERT(mark->ch == 'D');
+    memcpy(&ptr, mark, sizeof(void*));
+    return ptr;
+}
+
+static void
+md_resolve_range(MD_CTX* ctx, MD_MARKCHAIN* chain, int opener_index, int closer_index)
+{
+    MD_MARK* opener = &ctx->marks[opener_index];
+    MD_MARK* closer = &ctx->marks[closer_index];
+
+    /* Remove opener from the list of openers. */
+    if(chain != NULL) {
+        if(opener->prev >= 0)
+            ctx->marks[opener->prev].next = opener->next;
+        else
+            chain->head = opener->next;
+
+        if(opener->next >= 0)
+            ctx->marks[opener->next].prev = opener->prev;
+        else
+            chain->tail = opener->prev;
+    }
+
+    /* Interconnect opener and closer and mark both as resolved. */
+    opener->next = closer_index;
+    opener->flags |= MD_MARK_OPENER | MD_MARK_RESOLVED;
+    closer->prev = opener_index;
+    closer->flags |= MD_MARK_CLOSER | MD_MARK_RESOLVED;
+}
+
+
+#define MD_ROLLBACK_ALL         0
+#define MD_ROLLBACK_CROSSING    1
+
+/* In the range ctx->marks[opener_index] ... [closer_index], undo some or all
+ * resolvings accordingly to these rules:
+ *
+ * (1) All openers BEFORE the range corresponding to any closer inside the
+ *     range are un-resolved and they are re-added to their respective chains
+ *     of unresolved openers. This ensures we can reuse the opener for closers
+ *     AFTER the range.
+ *
+ * (2) If 'how' is MD_ROLLBACK_ALL, then ALL resolved marks inside the range
+ *     are discarded.
+ *
+ * (3) If 'how' is MD_ROLLBACK_CROSSING, only closers with openers handled
+ *     in (1) are discarded. I.e. pairs of openers and closers which are both
+ *     inside the range are retained as well as any unpaired marks.
+ */
+static void
+md_rollback(MD_CTX* ctx, int opener_index, int closer_index, int how)
+{
+    int i;
+    int mark_index;
+
+    /* Cut all unresolved openers at the mark index. */
+    for(i = OPENERS_CHAIN_FIRST; i < OPENERS_CHAIN_LAST+1; i++) {
+        MD_MARKCHAIN* chain = &ctx->mark_chains[i];
+
+        while(chain->tail >= opener_index)
+            chain->tail = ctx->marks[chain->tail].prev;
+
+        if(chain->tail >= 0)
+            ctx->marks[chain->tail].next = -1;
+        else
+            chain->head = -1;
+    }
+
+    /* Go backwards so that unresolved openers are re-added into their
+     * respective chains, in the right order. */
+    mark_index = closer_index - 1;
+    while(mark_index > opener_index) {
+        MD_MARK* mark = &ctx->marks[mark_index];
+        int mark_flags = mark->flags;
+        int discard_flag = (how == MD_ROLLBACK_ALL);
+
+        if(mark->flags & MD_MARK_CLOSER) {
+            int mark_opener_index = mark->prev;
+
+            /* Undo opener BEFORE the range. */
+            if(mark_opener_index < opener_index) {
+                MD_MARK* mark_opener = &ctx->marks[mark_opener_index];
+                MD_MARKCHAIN* chain;
+
+                mark_opener->flags &= ~(MD_MARK_OPENER | MD_MARK_CLOSER | MD_MARK_RESOLVED);
+                chain = md_mark_chain(ctx, opener_index);
+                if(chain != NULL) {
+                    md_mark_chain_append(ctx, chain, mark_opener_index);
+                    discard_flag = 1;
+                }
+            }
+        }
+
+        /* And reset our flags. */
+        if(discard_flag)
+            mark->flags &= ~(MD_MARK_OPENER | MD_MARK_CLOSER | MD_MARK_RESOLVED);
+
+        /* Jump as far as we can over unresolved or non-interesting marks. */
+        switch(how) {
+            case MD_ROLLBACK_CROSSING:
+                if((mark_flags & MD_MARK_CLOSER)  &&  mark->prev > opener_index) {
+                    /* If we are closer with opener INSIDE the range, there may
+                     * not be any other crosser inside the subrange. */
+                    mark_index = mark->prev;
+                    break;
+                }
+                MD_FALLTHROUGH();
+            default:
+                mark_index--;
+                break;
+        }
+    }
+}
+
+static void
+md_build_mark_char_map(MD_CTX* ctx)
+{
+    memset(ctx->mark_char_map, 0, sizeof(ctx->mark_char_map));
+
+    ctx->mark_char_map['\\'] = 1;
+    ctx->mark_char_map['*'] = 1;
+    ctx->mark_char_map['_'] = 1;
+    ctx->mark_char_map['`'] = 1;
+    ctx->mark_char_map['&'] = 1;
+    ctx->mark_char_map[';'] = 1;
+    ctx->mark_char_map['<'] = 1;
+    ctx->mark_char_map['>'] = 1;
+    ctx->mark_char_map['['] = 1;
+    ctx->mark_char_map['!'] = 1;
+    ctx->mark_char_map[']'] = 1;
+    ctx->mark_char_map['\0'] = 1;
+
+    if(ctx->parser.flags & MD_FLAG_STRIKETHROUGH)
+        ctx->mark_char_map['~'] = 1;
+
+    if(ctx->parser.flags & MD_FLAG_LATEXMATHSPANS)
+        ctx->mark_char_map['$'] = 1;
+
+    if(ctx->parser.flags & MD_FLAG_PERMISSIVEEMAILAUTOLINKS)
+        ctx->mark_char_map['@'] = 1;
+
+    if(ctx->parser.flags & MD_FLAG_PERMISSIVEURLAUTOLINKS)
+        ctx->mark_char_map[':'] = 1;
+
+    if(ctx->parser.flags & MD_FLAG_PERMISSIVEWWWAUTOLINKS)
+        ctx->mark_char_map['.'] = 1;
+
+    if((ctx->parser.flags & MD_FLAG_TABLES) || (ctx->parser.flags & MD_FLAG_WIKILINKS))
+        ctx->mark_char_map['|'] = 1;
+
+    if(ctx->parser.flags & MD_FLAG_COLLAPSEWHITESPACE) {
+        int i;
+
+        for(i = 0; i < (int) sizeof(ctx->mark_char_map); i++) {
+            if(ISWHITESPACE_(i))
+                ctx->mark_char_map[i] = 1;
+        }
+    }
+}
+
+/* We limit code span marks to lower than 32 backticks. This solves the
+ * pathologic case of too many openers, each of different length: Their
+ * resolving would be then O(n^2). */
+#define CODESPAN_MARK_MAXLEN    32
+
+static int
+md_is_code_span(MD_CTX* ctx, const MD_LINE* lines, int n_lines, OFF beg,
+                OFF* p_opener_beg, OFF* p_opener_end,
+                OFF* p_closer_beg, OFF* p_closer_end,
+                OFF last_potential_closers[CODESPAN_MARK_MAXLEN],
+                int* p_reached_paragraph_end)
+{
+    OFF opener_beg = beg;
+    OFF opener_end;
+    OFF closer_beg;
+    OFF closer_end;
+    SZ mark_len;
+    OFF line_end;
+    int has_space_after_opener = FALSE;
+    int has_eol_after_opener = FALSE;
+    int has_space_before_closer = FALSE;
+    int has_eol_before_closer = FALSE;
+    int has_only_space = TRUE;
+    int line_index = 0;
+
+    line_end = lines[0].end;
+    opener_end = opener_beg;
+    while(opener_end < line_end  &&  CH(opener_end) == _T('`'))
+        opener_end++;
+    has_space_after_opener = (opener_end < line_end && CH(opener_end) == _T(' '));
+    has_eol_after_opener = (opener_end == line_end);
+
+    /* The caller needs to know end of the opening mark even if we fail. */
+    *p_opener_end = opener_end;
+
+    mark_len = opener_end - opener_beg;
+    if(mark_len > CODESPAN_MARK_MAXLEN)
+        return FALSE;
+
+    /* Check whether we already know there is no closer of this length.
+     * If so, re-scan does no sense. This fixes issue #59. */
+    if(last_potential_closers[mark_len-1] >= lines[n_lines-1].end  ||
+       (*p_reached_paragraph_end  &&  last_potential_closers[mark_len-1] < opener_end))
+        return FALSE;
+
+    closer_beg = opener_end;
+    closer_end = opener_end;
+
+    /* Find closer mark. */
+    while(TRUE) {
+        while(closer_beg < line_end  &&  CH(closer_beg) != _T('`')) {
+            if(CH(closer_beg) != _T(' '))
+                has_only_space = FALSE;
+            closer_beg++;
+        }
+        closer_end = closer_beg;
+        while(closer_end < line_end  &&  CH(closer_end) == _T('`'))
+            closer_end++;
+
+        if(closer_end - closer_beg == mark_len) {
+            /* Success. */
+            has_space_before_closer = (closer_beg > lines[line_index].beg && CH(closer_beg-1) == _T(' '));
+            has_eol_before_closer = (closer_beg == lines[line_index].beg);
+            break;
+        }
+
+        if(closer_end - closer_beg > 0) {
+            /* We have found a back-tick which is not part of the closer. */
+            has_only_space = FALSE;
+
+            /* But if we eventually fail, remember it as a potential closer
+             * of its own length for future attempts. This mitigates needs for
+             * rescans. */
+            if(closer_end - closer_beg < CODESPAN_MARK_MAXLEN) {
+                if(closer_beg > last_potential_closers[closer_end - closer_beg - 1])
+                    last_potential_closers[closer_end - closer_beg - 1] = closer_beg;
+            }
+        }
+
+        if(closer_end >= line_end) {
+            line_index++;
+            if(line_index >= n_lines) {
+                /* Reached end of the paragraph and still nothing. */
+                *p_reached_paragraph_end = TRUE;
+                return FALSE;
+            }
+            /* Try on the next line. */
+            line_end = lines[line_index].end;
+            closer_beg = lines[line_index].beg;
+        } else {
+            closer_beg = closer_end;
+        }
+    }
+
+    /* If there is a space or a new line both after and before the opener
+     * (and if the code span is not made of spaces only), consume one initial
+     * and one trailing space as part of the marks. */
+    if(!has_only_space  &&
+       (has_space_after_opener || has_eol_after_opener)  &&
+       (has_space_before_closer || has_eol_before_closer))
+    {
+        if(has_space_after_opener)
+            opener_end++;
+        else
+            opener_end = lines[1].beg;
+
+        if(has_space_before_closer)
+            closer_beg--;
+        else {
+            closer_beg = lines[line_index-1].end;
+            /* We need to eat the preceding "\r\n" but not any line trailing
+             * spaces. */
+            while(closer_beg < ctx->size  &&  ISBLANK(closer_beg))
+                closer_beg++;
+        }
+    }
+
+    *p_opener_beg = opener_beg;
+    *p_opener_end = opener_end;
+    *p_closer_beg = closer_beg;
+    *p_closer_end = closer_end;
+    return TRUE;
+}
+
+static int
+md_is_autolink_uri(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end)
+{
+    OFF off = beg+1;
+
+    MD_ASSERT(CH(beg) == _T('<'));
+
+    /* Check for scheme. */
+    if(off >= max_end  ||  !ISASCII(off))
+        return FALSE;
+    off++;
+    while(1) {
+        if(off >= max_end)
+            return FALSE;
+        if(off - beg > 32)
+            return FALSE;
+        if(CH(off) == _T(':')  &&  off - beg >= 3)
+            break;
+        if(!ISALNUM(off) && CH(off) != _T('+') && CH(off) != _T('-') && CH(off) != _T('.'))
+            return FALSE;
+        off++;
+    }
+
+    /* Check the path after the scheme. */
+    while(off < max_end  &&  CH(off) != _T('>')) {
+        if(ISWHITESPACE(off) || ISCNTRL(off) || CH(off) == _T('<'))
+            return FALSE;
+        off++;
+    }
+
+    if(off >= max_end)
+        return FALSE;
+
+    MD_ASSERT(CH(off) == _T('>'));
+    *p_end = off+1;
+    return TRUE;
+}
+
+static int
+md_is_autolink_email(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end)
+{
+    OFF off = beg + 1;
+    int label_len;
+
+    MD_ASSERT(CH(beg) == _T('<'));
+
+    /* The code should correspond to this regexp:
+            /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+
+            @[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?
+            (?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/
+     */
+
+    /* Username (before '@'). */
+    while(off < max_end  &&  (ISALNUM(off) || ISANYOF(off, _T(".!#$%&'*+/=?^_`{|}~-"))))
+        off++;
+    if(off <= beg+1)
+        return FALSE;
+
+    /* '@' */
+    if(off >= max_end  ||  CH(off) != _T('@'))
+        return FALSE;
+    off++;
+
+    /* Labels delimited with '.'; each label is sequence of 1 - 63 alnum
+     * characters or '-', but '-' is not allowed as first or last char. */
+    label_len = 0;
+    while(off < max_end) {
+        if(ISALNUM(off))
+            label_len++;
+        else if(CH(off) == _T('-')  &&  label_len > 0)
+            label_len++;
+        else if(CH(off) == _T('.')  &&  label_len > 0  &&  CH(off-1) != _T('-'))
+            label_len = 0;
+        else
+            break;
+
+        if(label_len > 63)
+            return FALSE;
+
+        off++;
+    }
+
+    if(label_len <= 0  || off >= max_end  ||  CH(off) != _T('>') ||  CH(off-1) == _T('-'))
+        return FALSE;
+
+    *p_end = off+1;
+    return TRUE;
+}
+
+static int
+md_is_autolink(MD_CTX* ctx, OFF beg, OFF max_end, OFF* p_end, int* p_missing_mailto)
+{
+    if(md_is_autolink_uri(ctx, beg, max_end, p_end)) {
+        *p_missing_mailto = FALSE;
+        return TRUE;
+    }
+
+    if(md_is_autolink_email(ctx, beg, max_end, p_end)) {
+        *p_missing_mailto = TRUE;
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+static int
+md_collect_marks(MD_CTX* ctx, const MD_LINE* lines, int n_lines, int table_mode)
+{
+    int i;
+    int ret = 0;
+    MD_MARK* mark;
+    OFF codespan_last_potential_closers[CODESPAN_MARK_MAXLEN] = { 0 };
+    int codespan_scanned_till_paragraph_end = FALSE;
+
+    for(i = 0; i < n_lines; i++) {
+        const MD_LINE* line = &lines[i];
+        OFF off = line->beg;
+        OFF line_end = line->end;
+
+        while(TRUE) {
+            CHAR ch;
+
+#ifdef MD4C_USE_UTF16
+    /* For UTF-16, mark_char_map[] covers only ASCII. */
+    #define IS_MARK_CHAR(off)   ((CH(off) < SIZEOF_ARRAY(ctx->mark_char_map))  &&  \
+                                (ctx->mark_char_map[(unsigned char) CH(off)]))
+#else
+    /* For 8-bit encodings, mark_char_map[] covers all 256 elements. */
+    #define IS_MARK_CHAR(off)   (ctx->mark_char_map[(unsigned char) CH(off)])
+#endif
+
+            /* Optimization: Use some loop unrolling. */
+            while(off + 3 < line_end  &&  !IS_MARK_CHAR(off+0)  &&  !IS_MARK_CHAR(off+1)
+                                      &&  !IS_MARK_CHAR(off+2)  &&  !IS_MARK_CHAR(off+3))
+                off += 4;
+            while(off < line_end  &&  !IS_MARK_CHAR(off+0))
+                off++;
+
+            if(off >= line_end)
+                break;
+
+            ch = CH(off);
+
+            /* A backslash escape.
+             * It can go beyond line->end as it may involve escaped new
+             * line to form a hard break. */
+            if(ch == _T('\\')  &&  off+1 < ctx->size  &&  (ISPUNCT(off+1) || ISNEWLINE(off+1))) {
+                /* Hard-break cannot be on the last line of the block. */
+                if(!ISNEWLINE(off+1)  ||  i+1 < n_lines)
+                    PUSH_MARK(ch, off, off+2, MD_MARK_RESOLVED);
+                off += 2;
+                continue;
+            }
+
+            /* A potential (string) emphasis start/end. */
+            if(ch == _T('*')  ||  ch == _T('_')) {
+                OFF tmp = off+1;
+                int left_level;     /* What precedes: 0 = whitespace; 1 = punctuation; 2 = other char. */
+                int right_level;    /* What follows: 0 = whitespace; 1 = punctuation; 2 = other char. */
+
+                while(tmp < line_end  &&  CH(tmp) == ch)
+                    tmp++;
+
+                if(off == line->beg  ||  ISUNICODEWHITESPACEBEFORE(off))
+                    left_level = 0;
+                else if(ISUNICODEPUNCTBEFORE(off))
+                    left_level = 1;
+                else
+                    left_level = 2;
+
+                if(tmp == line_end  ||  ISUNICODEWHITESPACE(tmp))
+                    right_level = 0;
+                else if(ISUNICODEPUNCT(tmp))
+                    right_level = 1;
+                else
+                    right_level = 2;
+
+                /* Intra-word underscore doesn't have special meaning. */
+                if(ch == _T('_')  &&  left_level == 2  &&  right_level == 2) {
+                    left_level = 0;
+                    right_level = 0;
+                }
+
+                if(left_level != 0  ||  right_level != 0) {
+                    unsigned flags = 0;
+
+                    if(left_level > 0  &&  left_level >= right_level)
+                        flags |= MD_MARK_POTENTIAL_CLOSER;
+                    if(right_level > 0  &&  right_level >= left_level)
+                        flags |= MD_MARK_POTENTIAL_OPENER;
+                    if(left_level == 2  &&  right_level == 2)
+                        flags |= MD_MARK_EMPH_INTRAWORD;
+
+                    /* For "the rule of three" we need to remember the original
+                     * size of the mark (modulo three), before we potentially
+                     * split the mark when being later resolved partially by some
+                     * shorter closer. */
+                    switch((tmp - off) % 3) {
+                        case 0: flags |= MD_MARK_EMPH_MOD3_0; break;
+                        case 1: flags |= MD_MARK_EMPH_MOD3_1; break;
+                        case 2: flags |= MD_MARK_EMPH_MOD3_2; break;
+                    }
+
+                    PUSH_MARK(ch, off, tmp, flags);
+
+                    /* During resolving, multiple asterisks may have to be
+                     * split into independent span start/ends. Consider e.g.
+                     * "**foo* bar*". Therefore we push also some empty dummy
+                     * marks to have enough space for that. */
+                    off++;
+                    while(off < tmp) {
+                        PUSH_MARK('D', off, off, 0);
+                        off++;
+                    }
+                    continue;
+                }
+
+                off = tmp;
+                continue;
+            }
+
+            /* A potential code span start/end. */
+            if(ch == _T('`')) {
+                OFF opener_beg, opener_end;
+                OFF closer_beg, closer_end;
+                int is_code_span;
+
+                is_code_span = md_is_code_span(ctx, lines + i, n_lines - i, off,
+                                    &opener_beg, &opener_end, &closer_beg, &closer_end,
+                                    codespan_last_potential_closers,
+                                    &codespan_scanned_till_paragraph_end);
+                if(is_code_span) {
+                    PUSH_MARK(_T('`'), opener_beg, opener_end, MD_MARK_OPENER | MD_MARK_RESOLVED);
+                    PUSH_MARK(_T('`'), closer_beg, closer_end, MD_MARK_CLOSER | MD_MARK_RESOLVED);
+                    ctx->marks[ctx->n_marks-2].next = ctx->n_marks-1;
+                    ctx->marks[ctx->n_marks-1].prev = ctx->n_marks-2;
+
+                    off = closer_end;
+
+                    /* Advance the current line accordingly. */
+                    while(off > line_end) {
+                        i++;
+                        line++;
+                        line_end = line->end;
+                    }
+                    continue;
+                }
+
+                off = opener_end;
+                continue;
+            }
+
+            /* A potential entity start. */
+            if(ch == _T('&')) {
+                PUSH_MARK(ch, off, off+1, MD_MARK_POTENTIAL_OPENER);
+                off++;
+                continue;
+            }
+
+            /* A potential entity end. */
+            if(ch == _T(';')) {
+                /* We surely cannot be entity unless the previous mark is '&'. */
+                if(ctx->n_marks > 0  &&  ctx->marks[ctx->n_marks-1].ch == _T('&'))
+                    PUSH_MARK(ch, off, off+1, MD_MARK_POTENTIAL_CLOSER);
+
+                off++;
+                continue;
+            }
+
+            /* A potential autolink or raw HTML start/end. */
+            if(ch == _T('<')) {
+                int is_autolink;
+                OFF autolink_end;
+                int missing_mailto;
+
+                if(!(ctx->parser.flags & MD_FLAG_NOHTMLSPANS)) {
+                    int is_html;
+                    OFF html_end;
+
+                    /* Given the nature of the raw HTML, we have to recognize
+                     * it here. Doing so later in md_analyze_lt_gt() could
+                     * open can of worms of quadratic complexity. */
+                    is_html = md_is_html_any(ctx, lines + i, n_lines - i, off,
+                                    lines[n_lines-1].end, &html_end);
+                    if(is_html) {
+                        PUSH_MARK(_T('<'), off, off, MD_MARK_OPENER | MD_MARK_RESOLVED);
+                        PUSH_MARK(_T('>'), html_end, html_end, MD_MARK_CLOSER | MD_MARK_RESOLVED);
+                        ctx->marks[ctx->n_marks-2].next = ctx->n_marks-1;
+                        ctx->marks[ctx->n_marks-1].prev = ctx->n_marks-2;
+                        off = html_end;
+
+                        /* Advance the current line accordingly. */
+                        while(off > line_end) {
+                            i++;
+                            line++;
+                            line_end = line->end;
+                        }
+                        continue;
+                    }
+                }
+
+                is_autolink = md_is_autolink(ctx, off, lines[n_lines-1].end,
+                                    &autolink_end, &missing_mailto);
+                if(is_autolink) {
+                    PUSH_MARK((missing_mailto ? _T('@') : _T('<')), off, off+1,
+                                MD_MARK_OPENER | MD_MARK_RESOLVED | MD_MARK_AUTOLINK);
+                    PUSH_MARK(_T('>'), autolink_end-1, autolink_end,
+                                MD_MARK_CLOSER | MD_MARK_RESOLVED | MD_MARK_AUTOLINK);
+                    ctx->marks[ctx->n_marks-2].next = ctx->n_marks-1;
+                    ctx->marks[ctx->n_marks-1].prev = ctx->n_marks-2;
+                    off = autolink_end;
+                    continue;
+                }
+
+                off++;
+                continue;
+            }
+
+            /* A potential link or its part. */
+            if(ch == _T('[')  ||  (ch == _T('!') && off+1 < line_end && CH(off+1) == _T('['))) {
+                OFF tmp = (ch == _T('[') ? off+1 : off+2);
+                PUSH_MARK(ch, off, tmp, MD_MARK_POTENTIAL_OPENER);
+                off = tmp;
+                /* Two dummies to make enough place for data we need if it is
+                 * a link. */
+                PUSH_MARK('D', off, off, 0);
+                PUSH_MARK('D', off, off, 0);
+                continue;
+            }
+            if(ch == _T(']')) {
+                PUSH_MARK(ch, off, off+1, MD_MARK_POTENTIAL_CLOSER);
+                off++;
+                continue;
+            }
+
+            /* A potential permissive e-mail autolink. */
+            if(ch == _T('@')) {
+                if(line->beg + 1 <= off  &&  ISALNUM(off-1)  &&
+                    off + 3 < line->end  &&  ISALNUM(off+1))
+                {
+                    PUSH_MARK(ch, off, off+1, MD_MARK_POTENTIAL_OPENER);
+                    /* Push a dummy as a reserve for a closer. */
+                    PUSH_MARK('D', off, off, 0);
+                }
+
+                off++;
+                continue;
+            }
+
+            /* A potential permissive URL autolink. */
+            if(ch == _T(':')) {
+                static struct {
+                    const CHAR* scheme;
+                    SZ scheme_size;
+                    const CHAR* suffix;
+                    SZ suffix_size;
+                } scheme_map[] = {
+                    /* In the order from the most frequently used, arguably. */
+                    { _T("http"), 4,    _T("//"), 2 },
+                    { _T("https"), 5,   _T("//"), 2 },
+                    { _T("ftp"), 3,     _T("//"), 2 }
+                };
+                int scheme_index;
+
+                for(scheme_index = 0; scheme_index < (int) SIZEOF_ARRAY(scheme_map); scheme_index++) {
+                    const CHAR* scheme = scheme_map[scheme_index].scheme;
+                    const SZ scheme_size = scheme_map[scheme_index].scheme_size;
+                    const CHAR* suffix = scheme_map[scheme_index].suffix;
+                    const SZ suffix_size = scheme_map[scheme_index].suffix_size;
+
+                    if(line->beg + scheme_size <= off  &&  md_ascii_eq(STR(off-scheme_size), scheme, scheme_size)  &&
+                        (line->beg + scheme_size == off || ISWHITESPACE(off-scheme_size-1) || ISANYOF(off-scheme_size-1, _T("*_~([")))  &&
+                        off + 1 + suffix_size < line->end  &&  md_ascii_eq(STR(off+1), suffix, suffix_size))
+                    {
+                        PUSH_MARK(ch, off-scheme_size, off+1+suffix_size, MD_MARK_POTENTIAL_OPENER);
+                        /* Push a dummy as a reserve for a closer. */
+                        PUSH_MARK('D', off, off, 0);
+                        off += 1 + suffix_size;
+                        break;
+                    }
+                }
+
+                off++;
+                continue;
+            }
+
+            /* A potential permissive WWW autolink. */
+            if(ch == _T('.')) {
+                if(line->beg + 3 <= off  &&  md_ascii_eq(STR(off-3), _T("www"), 3)  &&
+                    (line->beg + 3 == off || ISWHITESPACE(off-4) || ISANYOF(off-4, _T("*_~([")))  &&
+                    off + 1 < line_end)
+                {
+                    PUSH_MARK(ch, off-3, off+1, MD_MARK_POTENTIAL_OPENER);
+                    /* Push a dummy as a reserve for a closer. */
+                    PUSH_MARK('D', off, off, 0);
+                    off++;
+                    continue;
+                }
+
+                off++;
+                continue;
+            }
+
+            /* A potential table cell boundary or wiki link label delimiter. */
+            if((table_mode || ctx->parser.flags & MD_FLAG_WIKILINKS) && ch == _T('|')) {
+                PUSH_MARK(ch, off, off+1, 0);
+                off++;
+                continue;
+            }
+
+            /* A potential strikethrough start/end. */
+            if(ch == _T('~')) {
+                OFF tmp = off+1;
+
+                while(tmp < line_end  &&  CH(tmp) == _T('~'))
+                    tmp++;
+
+                if(tmp - off < 3) {
+                    unsigned flags = 0;
+
+                    if(tmp < line_end  &&  !ISUNICODEWHITESPACE(tmp))
+                        flags |= MD_MARK_POTENTIAL_OPENER;
+                    if(off > line->beg  &&  !ISUNICODEWHITESPACEBEFORE(off))
+                        flags |= MD_MARK_POTENTIAL_CLOSER;
+                    if(flags != 0)
+                        PUSH_MARK(ch, off, tmp, flags);
+                }
+
+                off = tmp;
+                continue;
+            }
+
+            /* A potential equation start/end */
+            if(ch == _T('$')) {
+                /* We can have at most two consecutive $ signs,
+                 * where two dollar signs signify a display equation. */
+                OFF tmp = off+1;
+
+                while(tmp < line_end && CH(tmp) == _T('$'))
+                    tmp++;
+
+                if (tmp - off <= 2)
+                    PUSH_MARK(ch, off, tmp, MD_MARK_POTENTIAL_OPENER | MD_MARK_POTENTIAL_CLOSER);
+                off = tmp;
+                continue;
+            }
+
+            /* Turn non-trivial whitespace into single space. */
+            if(ISWHITESPACE_(ch)) {
+                OFF tmp = off+1;
+
+                while(tmp < line_end  &&  ISWHITESPACE(tmp))
+                    tmp++;
+
+                if(tmp - off > 1  ||  ch != _T(' '))
+                    PUSH_MARK(ch, off, tmp, MD_MARK_RESOLVED);
+
+                off = tmp;
+                continue;
+            }
+
+            /* NULL character. */
+            if(ch == _T('\0')) {
+                PUSH_MARK(ch, off, off+1, MD_MARK_RESOLVED);
+                off++;
+                continue;
+            }
+
+            off++;
+        }
+    }
+
+    /* Add a dummy mark at the end of the mark vector to simplify
+     * process_inlines(). */
+    PUSH_MARK(127, ctx->size, ctx->size, MD_MARK_RESOLVED);
+
+abort:
+    return ret;
+}
+
+static void
+md_analyze_bracket(MD_CTX* ctx, int mark_index)
+{
+    /* We cannot really resolve links here as for that we would need
+     * more context. E.g. a following pair of brackets (reference link),
+     * or enclosing pair of brackets (if the inner is the link, the outer
+     * one cannot be.)
+     *
+     * Therefore we here only construct a list of resolved '[' ']' pairs
+     * ordered by position of the closer. This allows ur to analyze what is
+     * or is not link in the right order, from inside to outside in case
+     * of nested brackets.
+     *
+     * The resolving itself is deferred into md_resolve_links().
+     */
+
+    MD_MARK* mark = &ctx->marks[mark_index];
+
+    if(mark->flags & MD_MARK_POTENTIAL_OPENER) {
+        md_mark_chain_append(ctx, &BRACKET_OPENERS, mark_index);
+        return;
+    }
+
+    if(BRACKET_OPENERS.tail >= 0) {
+        /* Pop the opener from the chain. */
+        int opener_index = BRACKET_OPENERS.tail;
+        MD_MARK* opener = &ctx->marks[opener_index];
+        if(opener->prev >= 0)
+            ctx->marks[opener->prev].next = -1;
+        else
+            BRACKET_OPENERS.head = -1;
+        BRACKET_OPENERS.tail = opener->prev;
+
+        /* Interconnect the opener and closer. */
+        opener->next = mark_index;
+        mark->prev = opener_index;
+
+        /* Add the pair into chain of potential links for md_resolve_links().
+         * Note we misuse opener->prev for this as opener->next points to its
+         * closer. */
+        if(ctx->unresolved_link_tail >= 0)
+            ctx->marks[ctx->unresolved_link_tail].prev = opener_index;
+        else
+            ctx->unresolved_link_head = opener_index;
+        ctx->unresolved_link_tail = opener_index;
+        opener->prev = -1;
+    }
+}
+
+/* Forward declaration. */
+static void md_analyze_link_contents(MD_CTX* ctx, const MD_LINE* lines, int n_lines,
+                                     int mark_beg, int mark_end);
+
+static int
+md_resolve_links(MD_CTX* ctx, const MD_LINE* lines, int n_lines)
+{
+    int opener_index = ctx->unresolved_link_head;
+    OFF last_link_beg = 0;
+    OFF last_link_end = 0;
+    OFF last_img_beg = 0;
+    OFF last_img_end = 0;
+
+    while(opener_index >= 0) {
+        MD_MARK* opener = &ctx->marks[opener_index];
+        int closer_index = opener->next;
+        MD_MARK* closer = &ctx->marks[closer_index];
+        int next_index = opener->prev;
+        MD_MARK* next_opener;
+        MD_MARK* next_closer;
+        MD_LINK_ATTR attr;
+        int is_link = FALSE;
+
+        if(next_index >= 0) {
+            next_opener = &ctx->marks[next_index];
+            next_closer = &ctx->marks[next_opener->next];
+        } else {
+            next_opener = NULL;
+            next_closer = NULL;
+        }
+
+        /* If nested ("[ [ ] ]"), we need to make sure that:
+         *   - The outer does not end inside of (...) belonging to the inner.
+         *   - The outer cannot be link if the inner is link (i.e. not image).
+         *
+         * (Note we here analyze from inner to outer as the marks are ordered
+         * by closer->beg.)
+         */
+        if((opener->beg < last_link_beg  &&  closer->end < last_link_end)  ||
+           (opener->beg < last_img_beg  &&  closer->end < last_img_end)  ||
+           (opener->beg < last_link_end  &&  opener->ch == '['))
+        {
+            opener_index = next_index;
+            continue;
+        }
+
+        /* Recognize and resolve wiki links.
+         * Wiki-links maybe '[[destination]]' or '[[destination|label]]'.
+         */
+        if ((ctx->parser.flags & MD_FLAG_WIKILINKS) &&
+            (opener->end - opener->beg == 1) &&         /* not image */
+            next_opener != NULL &&                      /* double '[' opener */
+            next_opener->ch == '[' &&
+            (next_opener->beg == opener->beg - 1) &&
+            (next_opener->end - next_opener->beg == 1) &&
+            next_closer != NULL &&                      /* double ']' closer */
+            next_closer->ch == ']' &&
+            (next_closer->beg == closer->beg + 1) &&
+            (next_closer->end - next_closer->beg == 1))
+        {
+            MD_MARK* delim = NULL;
+            int delim_index;
+            OFF dest_beg, dest_end;
+
+            is_link = TRUE;
+
+            /* We don't allow destination to be longer than 100 characters.
+             * Lets scan to see whether there is '|'. (If not then the whole
+             * wiki-link has to be below the 100 characters.) */
+            delim_index = opener_index + 1;
+            while(delim_index < closer_index) {
+                MD_MARK* m = &ctx->marks[delim_index];
+                if(m->ch == '|') {
+                    delim = m;
+                    break;
+                }
+                if(m->ch != 'D'  &&  m->beg - opener->end > 100)
+                    break;
+                delim_index++;
+            }
+            dest_beg = opener->end;
+            dest_end = (delim != NULL) ? delim->beg : closer->beg;
+            if(dest_end - dest_beg == 0 || dest_end - dest_beg > 100)
+                is_link = FALSE;
+
+            /* There may not be any new line in the destination. */
+            if(is_link) {
+                OFF off;
+                for(off = dest_beg; off < dest_end; off++) {
+                    if(ISNEWLINE(off)) {
+                        is_link = FALSE;
+                        break;
+                    }
+                }
+            }
+
+            if(is_link) {
+                if(delim != NULL) {
+                    if(delim->end < closer->beg) {
+                        opener->end = delim->beg;
+                    } else {
+                        /* The pipe is just before the closer: [[foo|]] */
+                        closer->beg = delim->beg;
+                        delim = NULL;
+                    }
+                }
+
+                opener->beg = next_opener->beg;
+                opener->next = closer_index;
+                opener->flags |= MD_MARK_OPENER | MD_MARK_RESOLVED;
+
+                closer->end = next_closer->end;
+                closer->prev = opener_index;
+                closer->flags |= MD_MARK_CLOSER | MD_MARK_RESOLVED;
+
+                last_link_beg = opener->beg;
+                last_link_end = closer->end;
+
+                if(delim != NULL) {
+                    delim->flags |= MD_MARK_RESOLVED;
+                    md_rollback(ctx, opener_index, delim_index, MD_ROLLBACK_ALL);
+                    md_analyze_link_contents(ctx, lines, n_lines, opener_index+1, closer_index);
+                } else {
+                    md_rollback(ctx, opener_index, closer_index, MD_ROLLBACK_ALL);
+                }
+
+                opener_index = next_opener->prev;
+                continue;
+            }
+        }
+
+        if(next_opener != NULL  &&  next_opener->beg == closer->end) {
+            if(next_closer->beg > closer->end + 1) {
+                /* Might be full reference link. */
+                is_link = md_is_link_reference(ctx, lines, n_lines, next_opener->beg, next_closer->end, &attr);
+            } else {
+                /* Might be shortcut reference link. */
+                is_link = md_is_link_reference(ctx, lines, n_lines, opener->beg, closer->end, &attr);
+            }
+
+            if(is_link < 0)
+                return -1;
+
+            if(is_link) {
+                /* Eat the 2nd "[...]". */
+                closer->end = next_closer->end;
+
+                /* Do not analyze the label as a standalone link in the next
+                 * iteration. */
+                next_index = ctx->marks[next_index].prev;
+            }
+        } else {
+            if(closer->end < ctx->size  &&  CH(closer->end) == _T('(')) {
+                /* Might be inline link. */
+                OFF inline_link_end = UINT_MAX;
+
+                is_link = md_is_inline_link_spec(ctx, lines, n_lines, closer->end, &inline_link_end, &attr);
+                if(is_link < 0)
+                    return -1;
+
+                /* Check the closing ')' is not inside an already resolved range
+                 * (i.e. a range with a higher priority), e.g. a code span. */
+                if(is_link) {
+                    int i = closer_index + 1;
+
+                    while(i < ctx->n_marks) {
+                        MD_MARK* mark = &ctx->marks[i];
+
+                        if(mark->beg >= inline_link_end)
+                            break;
+                        if((mark->flags & (MD_MARK_OPENER | MD_MARK_RESOLVED)) == (MD_MARK_OPENER | MD_MARK_RESOLVED)) {
+                            if(ctx->marks[mark->next].beg >= inline_link_end) {
+                                /* Cancel the link status. */
+                                if(attr.title_needs_free)
+                                    free(attr.title);
+                                is_link = FALSE;
+                                break;
+                            }
+
+                            i = mark->next + 1;
+                        } else {
+                            i++;
+                        }
+                    }
+                }
+
+                if(is_link) {
+                    /* Eat the "(...)" */
+                    closer->end = inline_link_end;
+                }
+            }
+
+            if(!is_link) {
+                /* Might be collapsed reference link. */
+                is_link = md_is_link_reference(ctx, lines, n_lines, opener->beg, closer->end, &attr);
+                if(is_link < 0)
+                    return -1;
+            }
+        }
+
+        if(is_link) {
+            /* Resolve the brackets as a link. */
+            opener->flags |= MD_MARK_OPENER | MD_MARK_RESOLVED;
+            closer->flags |= MD_MARK_CLOSER | MD_MARK_RESOLVED;
+
+            /* If it is a link, we store the destination and title in the two
+             * dummy marks after the opener. */
+            MD_ASSERT(ctx->marks[opener_index+1].ch == 'D');
+            ctx->marks[opener_index+1].beg = attr.dest_beg;
+            ctx->marks[opener_index+1].end = attr.dest_end;
+
+            MD_ASSERT(ctx->marks[opener_index+2].ch == 'D');
+            md_mark_store_ptr(ctx, opener_index+2, attr.title);
+            /* The title might or might not have been allocated for us. */
+            if(attr.title_needs_free)
+                md_mark_chain_append(ctx, &PTR_CHAIN, opener_index+2);
+            ctx->marks[opener_index+2].prev = attr.title_size;
+
+            if(opener->ch == '[') {
+                last_link_beg = opener->beg;
+                last_link_end = closer->end;
+            } else {
+                last_img_beg = opener->beg;
+                last_img_end = closer->end;
+            }
+
+            md_analyze_link_contents(ctx, lines, n_lines, opener_index+1, closer_index);
+
+            /* If the link text is formed by nothing but permissive autolink,
+             * suppress the autolink.
+             * See https://github.com/mity/md4c/issues/152 for more info. */
+            if(ctx->parser.flags & MD_FLAG_PERMISSIVEAUTOLINKS) {
+                MD_MARK* first_nested;
+                MD_MARK* last_nested;
+
+                first_nested = opener + 1;
+                while(first_nested->ch == _T('D')  &&  first_nested < closer)
+                    first_nested++;
+
+                last_nested = closer - 1;
+                while(first_nested->ch == _T('D')  &&  last_nested > opener)
+                    last_nested--;
+
+                if((first_nested->flags & MD_MARK_RESOLVED)  &&
+                   first_nested->beg == opener->end  &&
+                   ISANYOF_(first_nested->ch, _T("@:."))  &&
+                   first_nested->next == (last_nested - ctx->marks)  &&
+                   last_nested->end == closer->beg)
+                {
+                    first_nested->ch = _T('D');
+                    first_nested->flags &= ~MD_MARK_RESOLVED;
+                    last_nested->ch = _T('D');
+                    last_nested->flags &= ~MD_MARK_RESOLVED;
+                }
+            }
+        }
+
+        opener_index = next_index;
+    }
+
+    return 0;
+}
+
+/* Analyze whether the mark '&' starts a HTML entity.
+ * If so, update its flags as well as flags of corresponding closer ';'. */
+static void
+md_analyze_entity(MD_CTX* ctx, int mark_index)
+{
+    MD_MARK* opener = &ctx->marks[mark_index];
+    MD_MARK* closer;
+    OFF off;
+
+    /* Cannot be entity if there is no closer as the next mark.
+     * (Any other mark between would mean strange character which cannot be
+     * part of the entity.
+     *
+     * So we can do all the work on '&' and do not call this later for the
+     * closing mark ';'.
+     */
+    if(mark_index + 1 >= ctx->n_marks)
+        return;
+    closer = &ctx->marks[mark_index+1];
+    if(closer->ch != ';')
+        return;
+
+    if(md_is_entity(ctx, opener->beg, closer->end, &off)) {
+        MD_ASSERT(off == closer->end);
+
+        md_resolve_range(ctx, NULL, mark_index, mark_index+1);
+        opener->end = closer->end;
+    }
+}
+
+static void
+md_analyze_table_cell_boundary(MD_CTX* ctx, int mark_index)
+{
+    MD_MARK* mark = &ctx->marks[mark_index];
+    mark->flags |= MD_MARK_RESOLVED;
+
+    md_mark_chain_append(ctx, &TABLECELLBOUNDARIES, mark_index);
+    ctx->n_table_cell_boundaries++;
+}
+
+/* Split a longer mark into two. The new mark takes the given count of
+ * characters. May only be called if an adequate number of dummy 'D' marks
+ * follows.
+ */
+static int
+md_split_emph_mark(MD_CTX* ctx, int mark_index, SZ n)
+{
+    MD_MARK* mark = &ctx->marks[mark_index];
+    int new_mark_index = mark_index + (mark->end - mark->beg - n);
+    MD_MARK* dummy = &ctx->marks[new_mark_index];
+
+    MD_ASSERT(mark->end - mark->beg > n);
+    MD_ASSERT(dummy->ch == 'D');
+
+    memcpy(dummy, mark, sizeof(MD_MARK));
+    mark->end -= n;
+    dummy->beg = mark->end;
+
+    return new_mark_index;
+}
+
+static void
+md_analyze_emph(MD_CTX* ctx, int mark_index)
+{
+    MD_MARK* mark = &ctx->marks[mark_index];
+    MD_MARKCHAIN* chain = md_mark_chain(ctx, mark_index);
+
+    /* If we can be a closer, try to resolve with the preceding opener. */
+    if(mark->flags & MD_MARK_POTENTIAL_CLOSER) {
+        MD_MARK* opener = NULL;
+        int opener_index = 0;
+
+        if(mark->ch == _T('*')) {
+            MD_MARKCHAIN* opener_chains[6];
+            int i, n_opener_chains;
+            unsigned flags = mark->flags;
+
+            /* Apply the "rule of three". */
+            n_opener_chains = 0;
+            opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_intraword_mod3_0;
+            if((flags & MD_MARK_EMPH_MOD3_MASK) != MD_MARK_EMPH_MOD3_2)
+                opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_intraword_mod3_1;
+            if((flags & MD_MARK_EMPH_MOD3_MASK) != MD_MARK_EMPH_MOD3_1)
+                opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_intraword_mod3_2;
+            opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_extraword_mod3_0;
+            if(!(flags & MD_MARK_EMPH_INTRAWORD)  ||  (flags & MD_MARK_EMPH_MOD3_MASK) != MD_MARK_EMPH_MOD3_2)
+                opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_extraword_mod3_1;
+            if(!(flags & MD_MARK_EMPH_INTRAWORD)  ||  (flags & MD_MARK_EMPH_MOD3_MASK) != MD_MARK_EMPH_MOD3_1)
+                opener_chains[n_opener_chains++] = &ASTERISK_OPENERS_extraword_mod3_2;
+
+            /* Opener is the most recent mark from the allowed chains. */
+            for(i = 0; i < n_opener_chains; i++) {
+                if(opener_chains[i]->tail >= 0) {
+                    int tmp_index = opener_chains[i]->tail;
+                    MD_MARK* tmp_mark = &ctx->marks[tmp_index];
+                    if(opener == NULL  ||  tmp_mark->end > opener->end) {
+                        opener_index = tmp_index;
+                        opener = tmp_mark;
+                    }
+                }
+            }
+        } else {
+            /* Simple emph. mark */
+            if(chain->tail >= 0) {
+                opener_index = chain->tail;
+                opener = &ctx->marks[opener_index];
+            }
+        }
+
+        /* Resolve, if we have found matching opener. */
+        if(opener != NULL) {
+            SZ opener_size = opener->end - opener->beg;
+            SZ closer_size = mark->end - mark->beg;
+            MD_MARKCHAIN* opener_chain = md_mark_chain(ctx, opener_index);
+
+            if(opener_size > closer_size) {
+                opener_index = md_split_emph_mark(ctx, opener_index, closer_size);
+                md_mark_chain_append(ctx, opener_chain, opener_index);
+            } else if(opener_size < closer_size) {
+                md_split_emph_mark(ctx, mark_index, closer_size - opener_size);
+            }
+
+            md_rollback(ctx, opener_index, mark_index, MD_ROLLBACK_CROSSING);
+            md_resolve_range(ctx, opener_chain, opener_index, mark_index);
+            return;
+        }
+    }
+
+    /* If we could not resolve as closer, we may be yet be an opener. */
+    if(mark->flags & MD_MARK_POTENTIAL_OPENER)
+        md_mark_chain_append(ctx, chain, mark_index);
+}
+
+static void
+md_analyze_tilde(MD_CTX* ctx, int mark_index)
+{
+    MD_MARK* mark = &ctx->marks[mark_index];
+    MD_MARKCHAIN* chain = md_mark_chain(ctx, mark_index);
+
+    /* We attempt to be Github Flavored Markdown compatible here. GFM accepts
+     * only tildes sequences of length 1 and 2, and the length of the opener
+     * and closer has to match. */
+
+    if((mark->flags & MD_MARK_POTENTIAL_CLOSER)  &&  chain->head >= 0) {
+        int opener_index = chain->head;
+
+        md_rollback(ctx, opener_index, mark_index, MD_ROLLBACK_CROSSING);
+        md_resolve_range(ctx, chain, opener_index, mark_index);
+        return;
+    }
+
+    if(mark->flags & MD_MARK_POTENTIAL_OPENER)
+        md_mark_chain_append(ctx, chain, mark_index);
+}
+
+static void
+md_analyze_dollar(MD_CTX* ctx, int mark_index)
+{
+    /* This should mimic the way inline equations work in LaTeX, so there
+     * can only ever be one item in the chain (i.e. the dollars can't be
+     * nested). This is basically the same as the md_analyze_tilde function,
+     * except that we require matching openers and closers to be of the same
+     * length.
+     *
+     * E.g.: $abc$$def$$ => abc (display equation) def (end equation) */
+    if(DOLLAR_OPENERS.head >= 0) {
+        /* If the potential closer has a non-matching number of $, discard */
+        MD_MARK* open = &ctx->marks[DOLLAR_OPENERS.head];
+        MD_MARK* close = &ctx->marks[mark_index];
+
+        int opener_index = DOLLAR_OPENERS.head;
+        md_rollback(ctx, opener_index, mark_index, MD_ROLLBACK_ALL);
+        if (open->end - open->beg == close->end - close->beg) {
+            /* We are the matching closer */
+            md_resolve_range(ctx, &DOLLAR_OPENERS, opener_index, mark_index);
+        } else {
+            /* We don't match the opener, so discard old opener and insert as opener */
+            md_mark_chain_append(ctx, &DOLLAR_OPENERS, mark_index);
+        }
+    } else {
+        /* No unmatched openers, so we are opener */
+        md_mark_chain_append(ctx, &DOLLAR_OPENERS, mark_index);
+    }
+}
+
+static void
+md_analyze_permissive_url_autolink(MD_CTX* ctx, int mark_index)
+{
+    MD_MARK* opener = &ctx->marks[mark_index];
+    int closer_index = mark_index + 1;
+    MD_MARK* closer = &ctx->marks[closer_index];
+    MD_MARK* next_resolved_mark;
+    OFF off = opener->end;
+    int n_dots = FALSE;
+    int has_underscore_in_last_seg = FALSE;
+    int has_underscore_in_next_to_last_seg = FALSE;
+    int n_opened_parenthesis = 0;
+    int n_excess_parenthesis = 0;
+
+    /* Check for domain. */
+    while(off < ctx->size) {
+        if(ISALNUM(off) || CH(off) == _T('-')) {
+            off++;
+        } else if(CH(off) == _T('.')) {
+            /* We must see at least one period. */
+            n_dots++;
+            has_underscore_in_next_to_last_seg = has_underscore_in_last_seg;
+            has_underscore_in_last_seg = FALSE;
+            off++;
+        } else if(CH(off) == _T('_')) {
+            /* No underscore may be present in the last two domain segments. */
+            has_underscore_in_last_seg = TRUE;
+            off++;
+        } else {
+            break;
+        }
+    }
+    if(off > opener->end  &&  CH(off-1) == _T('.')) {
+        off--;
+        n_dots--;
+    }
+    if(off <= opener->end || n_dots == 0 || has_underscore_in_next_to_last_seg || has_underscore_in_last_seg)
+        return;
+
+    /* Check for path. */
+    next_resolved_mark = closer + 1;
+    while(next_resolved_mark->ch == 'D' || !(next_resolved_mark->flags & MD_MARK_RESOLVED))
+        next_resolved_mark++;
+    while(off < next_resolved_mark->beg  &&  CH(off) != _T('<')  &&  !ISWHITESPACE(off)  &&  !ISNEWLINE(off)) {
+        /* Parenthesis must be balanced. */
+        if(CH(off) == _T('(')) {
+            n_opened_parenthesis++;
+        } else if(CH(off) == _T(')')) {
+            if(n_opened_parenthesis > 0)
+                n_opened_parenthesis--;
+            else
+                n_excess_parenthesis++;
+        }
+
+        off++;
+    }
+
+    /* Trim a trailing punctuation from the end. */
+    while(TRUE) {
+        if(ISANYOF(off-1, _T("?!.,:*_~"))) {
+            off--;
+        } else if(CH(off-1) == ')'  &&  n_excess_parenthesis > 0) {
+            /* Unmatched ')' can be in an interior of the path but not at the
+             * of it, so the auto-link may be safely nested in a parenthesis
+             * pair. */
+            off--;
+            n_excess_parenthesis--;
+        } else {
+            break;
+        }
+    }
+
+    /* Ok. Lets call it an auto-link. Adapt opener and create closer to zero
+     * length so all the contents becomes the link text. */
+    MD_ASSERT(closer->ch == 'D');
+    opener->end = opener->beg;
+    closer->ch = opener->ch;
+    closer->beg = off;
+    closer->end = off;
+    md_resolve_range(ctx, NULL, mark_index, closer_index);
+}
+
+/* The permissive autolinks do not have to be enclosed in '<' '>' but we
+ * instead impose stricter rules what is understood as an e-mail address
+ * here. Actually any non-alphanumeric characters with exception of '.'
+ * are prohibited both in username and after '@'. */
+static void
+md_analyze_permissive_email_autolink(MD_CTX* ctx, int mark_index)
+{
+    MD_MARK* opener = &ctx->marks[mark_index];
+    int closer_index;
+    MD_MARK* closer;
+    OFF beg = opener->beg;
+    OFF end = opener->end;
+    int dot_count = 0;
+
+    MD_ASSERT(CH(beg) == _T('@'));
+
+    /* Scan for name before '@'. */
+    while(beg > 0  &&  (ISALNUM(beg-1) || ISANYOF(beg-1, _T(".-_+"))))
+        beg--;
+
+    /* Scan for domain after '@'. */
+    while(end < ctx->size  &&  (ISALNUM(end) || ISANYOF(end, _T(".-_")))) {
+        if(CH(end) == _T('.'))
+            dot_count++;
+        end++;
+    }
+    if(CH(end-1) == _T('.')) {  /* Final '.' not part of it. */
+        dot_count--;
+        end--;
+    }
+    else if(ISANYOF2(end-1, _T('-'), _T('_'))) /* These are forbidden at the end. */
+        return;
+    if(CH(end-1) == _T('@')  ||  dot_count == 0)
+        return;
+
+    /* Ok. Lets call it auto-link. Adapt opener and create closer to zero
+     * length so all the contents becomes the link text. */
+    closer_index = mark_index + 1;
+    closer = &ctx->marks[closer_index];
+    MD_ASSERT(closer->ch == 'D');
+
+    opener->beg = beg;
+    opener->end = beg;
+    closer->ch = opener->ch;
+    closer->beg = end;
+    closer->end = end;
+    md_resolve_range(ctx, NULL, mark_index, closer_index);
+}
+
+static inline void
+md_analyze_marks(MD_CTX* ctx, const MD_LINE* lines, int n_lines,
+                 int mark_beg, int mark_end, const CHAR* mark_chars)
+{
+    int i = mark_beg;
+    MD_UNUSED(lines);
+    MD_UNUSED(n_lines);
+
+    while(i < mark_end) {
+        MD_MARK* mark = &ctx->marks[i];
+
+        /* Skip resolved spans. */
+        if(mark->flags & MD_MARK_RESOLVED) {
+            if(mark->flags & MD_MARK_OPENER) {
+                MD_ASSERT(i < mark->next);
+                i = mark->next + 1;
+            } else {
+                i++;
+            }
+            continue;
+        }
+
+        /* Skip marks we do not want to deal with. */
+        if(!ISANYOF_(mark->ch, mark_chars)) {
+            i++;
+            continue;
+        }
+
+        /* Analyze the mark. */
+        switch(mark->ch) {
+            case '[':   /* Pass through. */
+            case '!':   /* Pass through. */
+            case ']':   md_analyze_bracket(ctx, i); break;
+            case '&':   md_analyze_entity(ctx, i); break;
+            case '|':   md_analyze_table_cell_boundary(ctx, i); break;
+            case '_':   /* Pass through. */
+            case '*':   md_analyze_emph(ctx, i); break;
+            case '~':   md_analyze_tilde(ctx, i); break;
+            case '$':   md_analyze_dollar(ctx, i); break;
+            case '.':   /* Pass through. */
+            case ':':   md_analyze_permissive_url_autolink(ctx, i); break;
+            case '@':   md_analyze_permissive_email_autolink(ctx, i); break;
+        }
+
+        i++;
+    }
+}
+
+/* Analyze marks (build ctx->marks). */
+static int
+md_analyze_inlines(MD_CTX* ctx, const MD_LINE* lines, int n_lines, int table_mode)
+{
+    int ret;
+
+    /* Reset the previously collected stack of marks. */
+    ctx->n_marks = 0;
+
+    /* Collect all marks. */
+    MD_CHECK(md_collect_marks(ctx, lines, n_lines, table_mode));
+
+    /* We analyze marks in few groups to handle their precedence. */
+    /* (1) Entities; code spans; autolinks; raw HTML. */
+    md_analyze_marks(ctx, lines, n_lines, 0, ctx->n_marks, _T("&"));
+
+    /* (2) Links. */
+    md_analyze_marks(ctx, lines, n_lines, 0, ctx->n_marks, _T("[]!"));
+    MD_CHECK(md_resolve_links(ctx, lines, n_lines));
+    BRACKET_OPENERS.head = -1;
+    BRACKET_OPENERS.tail = -1;
+    ctx->unresolved_link_head = -1;
+    ctx->unresolved_link_tail = -1;
+
+    if(table_mode) {
+        /* (3) Analyze table cell boundaries.
+         * Note we reset TABLECELLBOUNDARIES chain prior to the call md_analyze_marks(),
+         * not after, because caller may need it. */
+        MD_ASSERT(n_lines == 1);
+        TABLECELLBOUNDARIES.head = -1;
+        TABLECELLBOUNDARIES.tail = -1;
+        ctx->n_table_cell_boundaries = 0;
+        md_analyze_marks(ctx, lines, n_lines, 0, ctx->n_marks, _T("|"));
+        return ret;
+    }
+
+    /* (4) Emphasis and strong emphasis; permissive autolinks. */
+    md_analyze_link_contents(ctx, lines, n_lines, 0, ctx->n_marks);
+
+abort:
+    return ret;
+}
+
+static void
+md_analyze_link_contents(MD_CTX* ctx, const MD_LINE* lines, int n_lines,
+                         int mark_beg, int mark_end)
+{
+    int i;
+
+    md_analyze_marks(ctx, lines, n_lines, mark_beg, mark_end, _T("*_~$@:."));
+
+    for(i = OPENERS_CHAIN_FIRST; i <= OPENERS_CHAIN_LAST; i++) {
+        ctx->mark_chains[i].head = -1;
+        ctx->mark_chains[i].tail = -1;
+    }
+}
+
+static int
+md_enter_leave_span_a(MD_CTX* ctx, int enter, MD_SPANTYPE type,
+                      const CHAR* dest, SZ dest_size, int prohibit_escapes_in_dest,
+                      const CHAR* title, SZ title_size)
+{
+    MD_ATTRIBUTE_BUILD href_build = { 0 };
+    MD_ATTRIBUTE_BUILD title_build = { 0 };
+    MD_SPAN_A_DETAIL det;
+    int ret = 0;
+
+    /* Note we here rely on fact that MD_SPAN_A_DETAIL and
+     * MD_SPAN_IMG_DETAIL are binary-compatible. */
+    memset(&det, 0, sizeof(MD_SPAN_A_DETAIL));
+    MD_CHECK(md_build_attribute(ctx, dest, dest_size,
+                    (prohibit_escapes_in_dest ? MD_BUILD_ATTR_NO_ESCAPES : 0),
+                    &det.href, &href_build));
+    MD_CHECK(md_build_attribute(ctx, title, title_size, 0, &det.title, &title_build));
+
+    if(enter)
+        MD_ENTER_SPAN(type, &det);
+    else
+        MD_LEAVE_SPAN(type, &det);
+
+abort:
+    md_free_attribute(ctx, &href_build);
+    md_free_attribute(ctx, &title_build);
+    return ret;
+}
+
+static int
+md_enter_leave_span_wikilink(MD_CTX* ctx, int enter, const CHAR* target, SZ target_size)
+{
+    MD_ATTRIBUTE_BUILD target_build = { 0 };
+    MD_SPAN_WIKILINK_DETAIL det;
+    int ret = 0;
+
+    memset(&det, 0, sizeof(MD_SPAN_WIKILINK_DETAIL));
+    MD_CHECK(md_build_attribute(ctx, target, target_size, 0, &det.target, &target_build));
+
+    if (enter)
+        MD_ENTER_SPAN(MD_SPAN_WIKILINK, &det);
+    else
+        MD_LEAVE_SPAN(MD_SPAN_WIKILINK, &det);
+
+abort:
+    md_free_attribute(ctx, &target_build);
+    return ret;
+}
+
+
+/* Render the output, accordingly to the analyzed ctx->marks. */
+static int
+md_process_inlines(MD_CTX* ctx, const MD_LINE* lines, int n_lines)
+{
+    MD_TEXTTYPE text_type;
+    const MD_LINE* line = lines;
+    MD_MARK* prev_mark = NULL;
+    MD_MARK* mark;
+    OFF off = lines[0].beg;
+    OFF end = lines[n_lines-1].end;
+    int enforce_hardbreak = 0;
+    int ret = 0;
+
+    /* Find first resolved mark. Note there is always at least one resolved
+     * mark,  the dummy last one after the end of the latest line we actually
+     * never really reach. This saves us of a lot of special checks and cases
+     * in this function. */
+    mark = ctx->marks;
+    while(!(mark->flags & MD_MARK_RESOLVED))
+        mark++;
+
+    text_type = MD_TEXT_NORMAL;
+
+    while(1) {
+        /* Process the text up to the next mark or end-of-line. */
+        OFF tmp = (line->end < mark->beg ? line->end : mark->beg);
+        if(tmp > off) {
+            MD_TEXT(text_type, STR(off), tmp - off);
+            off = tmp;
+        }
+
+        /* If reached the mark, process it and move to next one. */
+        if(off >= mark->beg) {
+            switch(mark->ch) {
+                case '\\':      /* Backslash escape. */
+                    if(ISNEWLINE(mark->beg+1))
+                        enforce_hardbreak = 1;
+                    else
+                        MD_TEXT(text_type, STR(mark->beg+1), 1);
+                    break;
+
+                case ' ':       /* Non-trivial space. */
+                    MD_TEXT(text_type, _T(" "), 1);
+                    break;
+
+                case '`':       /* Code span. */
+                    if(mark->flags & MD_MARK_OPENER) {
+                        MD_ENTER_SPAN(MD_SPAN_CODE, NULL);
+                        text_type = MD_TEXT_CODE;
+                    } else {
+                        MD_LEAVE_SPAN(MD_SPAN_CODE, NULL);
+                        text_type = MD_TEXT_NORMAL;
+                    }
+                    break;
+
+                case '_':       /* Underline (or emphasis if we fall through). */
+                    if(ctx->parser.flags & MD_FLAG_UNDERLINE) {
+                        if(mark->flags & MD_MARK_OPENER) {
+                            while(off < mark->end) {
+                                MD_ENTER_SPAN(MD_SPAN_U, NULL);
+                                off++;
+                            }
+                        } else {
+                            while(off < mark->end) {
+                                MD_LEAVE_SPAN(MD_SPAN_U, NULL);
+                                off++;
+                            }
+                        }
+                        break;
+                    }
+                    MD_FALLTHROUGH();
+
+                case '*':       /* Emphasis, strong emphasis. */
+                    if(mark->flags & MD_MARK_OPENER) {
+                        if((mark->end - off) % 2) {
+                            MD_ENTER_SPAN(MD_SPAN_EM, NULL);
+                            off++;
+                        }
+                        while(off + 1 < mark->end) {
+                            MD_ENTER_SPAN(MD_SPAN_STRONG, NULL);
+                            off += 2;
+                        }
+                    } else {
+                        while(off + 1 < mark->end) {
+                            MD_LEAVE_SPAN(MD_SPAN_STRONG, NULL);
+                            off += 2;
+                        }
+                        if((mark->end - off) % 2) {
+                            MD_LEAVE_SPAN(MD_SPAN_EM, NULL);
+                            off++;
+                        }
+                    }
+                    break;
+
+                case '~':
+                    if(mark->flags & MD_MARK_OPENER)
+                        MD_ENTER_SPAN(MD_SPAN_DEL, NULL);
+                    else
+                        MD_LEAVE_SPAN(MD_SPAN_DEL, NULL);
+                    break;
+
+                case '$':
+                    if(mark->flags & MD_MARK_OPENER) {
+                        MD_ENTER_SPAN((mark->end - off) % 2 ? MD_SPAN_LATEXMATH : MD_SPAN_LATEXMATH_DISPLAY, NULL);
+                        text_type = MD_TEXT_LATEXMATH;
+                    } else {
+                        MD_LEAVE_SPAN((mark->end - off) % 2 ? MD_SPAN_LATEXMATH : MD_SPAN_LATEXMATH_DISPLAY, NULL);
+                        text_type = MD_TEXT_NORMAL;
+                    }
+                    break;
+
+                case '[':       /* Link, wiki link, image. */
+                case '!':
+                case ']':
+                {
+                    const MD_MARK* opener = (mark->ch != ']' ? mark : &ctx->marks[mark->prev]);
+                    const MD_MARK* closer = &ctx->marks[opener->next];
+                    const MD_MARK* dest_mark;
+                    const MD_MARK* title_mark;
+
+                    if ((opener->ch == '[' && closer->ch == ']') &&
+                        opener->end - opener->beg >= 2 &&
+                        closer->end - closer->beg >= 2)
+                    {
+                        int has_label = (opener->end - opener->beg > 2);
+                        SZ target_sz;
+
+                        if(has_label)
+                            target_sz = opener->end - (opener->beg+2);
+                        else
+                            target_sz = closer->beg - opener->end;
+
+                        MD_CHECK(md_enter_leave_span_wikilink(ctx, (mark->ch != ']'),
+                                 has_label ? STR(opener->beg+2) : STR(opener->end),
+                                 target_sz));
+
+                        break;
+                    }
+
+                    dest_mark = opener+1;
+                    MD_ASSERT(dest_mark->ch == 'D');
+                    title_mark = opener+2;
+                    MD_ASSERT(title_mark->ch == 'D');
+
+                    MD_CHECK(md_enter_leave_span_a(ctx, (mark->ch != ']'),
+                                (opener->ch == '!' ? MD_SPAN_IMG : MD_SPAN_A),
+                                STR(dest_mark->beg), dest_mark->end - dest_mark->beg, FALSE,
+                                md_mark_get_ptr(ctx, (int)(title_mark - ctx->marks)),
+								title_mark->prev));
+
+                    /* link/image closer may span multiple lines. */
+                    if(mark->ch == ']') {
+                        while(mark->end > line->end)
+                            line++;
+                    }
+
+                    break;
+                }
+
+                case '<':
+                case '>':       /* Autolink or raw HTML. */
+                    if(!(mark->flags & MD_MARK_AUTOLINK)) {
+                        /* Raw HTML. */
+                        if(mark->flags & MD_MARK_OPENER)
+                            text_type = MD_TEXT_HTML;
+                        else
+                            text_type = MD_TEXT_NORMAL;
+                        break;
+                    }
+                    /* Pass through, if auto-link. */
+                    MD_FALLTHROUGH();
+
+                case '@':       /* Permissive e-mail autolink. */
+                case ':':       /* Permissive URL autolink. */
+                case '.':       /* Permissive WWW autolink. */
+                {
+                    MD_MARK* opener = ((mark->flags & MD_MARK_OPENER) ? mark : &ctx->marks[mark->prev]);
+                    MD_MARK* closer = &ctx->marks[opener->next];
+                    const CHAR* dest = STR(opener->end);
+                    SZ dest_size = closer->beg - opener->end;
+
+                    /* For permissive auto-links we do not know closer mark
+                     * position at the time of md_collect_marks(), therefore
+                     * it can be out-of-order in ctx->marks[].
+                     *
+                     * With this flag, we make sure that we output the closer
+                     * only if we processed the opener. */
+                    if(mark->flags & MD_MARK_OPENER)
+                        closer->flags |= MD_MARK_VALIDPERMISSIVEAUTOLINK;
+
+                    if(opener->ch == '@' || opener->ch == '.') {
+                        dest_size += 7;
+                        MD_TEMP_BUFFER(dest_size * sizeof(CHAR));
+                        memcpy(ctx->buffer,
+                                (opener->ch == '@' ? _T("mailto:") : _T("http://")),
+                                7 * sizeof(CHAR));
+                        memcpy(ctx->buffer + 7, dest, (dest_size-7) * sizeof(CHAR));
+                        dest = ctx->buffer;
+                    }
+
+                    if(closer->flags & MD_MARK_VALIDPERMISSIVEAUTOLINK)
+                        MD_CHECK(md_enter_leave_span_a(ctx, (mark->flags & MD_MARK_OPENER),
+                                    MD_SPAN_A, dest, dest_size, TRUE, NULL, 0));
+                    break;
+                }
+
+                case '&':       /* Entity. */
+                    MD_TEXT(MD_TEXT_ENTITY, STR(mark->beg), mark->end - mark->beg);
+                    break;
+
+                case '\0':
+                    MD_TEXT(MD_TEXT_NULLCHAR, _T(""), 1);
+                    break;
+
+                case 127:
+                    goto abort;
+            }
+
+            off = mark->end;
+
+            /* Move to next resolved mark. */
+            prev_mark = mark;
+            mark++;
+            while(!(mark->flags & MD_MARK_RESOLVED)  ||  mark->beg < off)
+                mark++;
+        }
+
+        /* If reached end of line, move to next one. */
+        if(off >= line->end) {
+            /* If it is the last line, we are done. */
+            if(off >= end)
+                break;
+
+            if(text_type == MD_TEXT_CODE || text_type == MD_TEXT_LATEXMATH) {
+                OFF tmp;
+
+                MD_ASSERT(prev_mark != NULL);
+                MD_ASSERT(ISANYOF2_(prev_mark->ch, '`', '$')  &&  (prev_mark->flags & MD_MARK_OPENER));
+                MD_ASSERT(ISANYOF2_(mark->ch, '`', '$')  &&  (mark->flags & MD_MARK_CLOSER));
+
+                /* Inside a code span, trailing line whitespace has to be
+                 * outputted. */
+                tmp = off;
+                while(off < ctx->size  &&  ISBLANK(off))
+                    off++;
+                if(off > tmp)
+                    MD_TEXT(text_type, STR(tmp), off-tmp);
+
+                /* and new lines are transformed into single spaces. */
+                if(prev_mark->end < off  &&  off < mark->beg)
+                    MD_TEXT(text_type, _T(" "), 1);
+            } else if(text_type == MD_TEXT_HTML) {
+                /* Inside raw HTML, we output the new line verbatim, including
+                 * any trailing spaces. */
+                OFF tmp = off;
+
+                while(tmp < end  &&  ISBLANK(tmp))
+                    tmp++;
+                if(tmp > off)
+                    MD_TEXT(MD_TEXT_HTML, STR(off), tmp - off);
+                MD_TEXT(MD_TEXT_HTML, _T("\n"), 1);
+            } else {
+                /* Output soft or hard line break. */
+                MD_TEXTTYPE break_type = MD_TEXT_SOFTBR;
+
+                if(text_type == MD_TEXT_NORMAL) {
+                    if(enforce_hardbreak)
+                        break_type = MD_TEXT_BR;
+                    else if((CH(line->end) == _T(' ') && CH(line->end+1) == _T(' ')))
+                        break_type = MD_TEXT_BR;
+                }
+
+                MD_TEXT(break_type, _T("\n"), 1);
+            }
+
+            /* Move to the next line. */
+            line++;
+            off = line->beg;
+
+            enforce_hardbreak = 0;
+        }
+    }
+
+abort:
+    return ret;
+}
+
+
+/***************************
+ ***  Processing Tables  ***
+ ***************************/
+
+static void
+md_analyze_table_alignment(MD_CTX* ctx, OFF beg, OFF end, MD_ALIGN* align, int n_align)
+{
+    static const MD_ALIGN align_map[] = { MD_ALIGN_DEFAULT, MD_ALIGN_LEFT, MD_ALIGN_RIGHT, MD_ALIGN_CENTER };
+    OFF off = beg;
+
+    while(n_align > 0) {
+        int index = 0;  /* index into align_map[] */
+
+        while(CH(off) != _T('-'))
+            off++;
+        if(off > beg  &&  CH(off-1) == _T(':'))
+            index |= 1;
+        while(off < end  &&  CH(off) == _T('-'))
+            off++;
+        if(off < end  &&  CH(off) == _T(':'))
+            index |= 2;
+
+        *align = align_map[index];
+        align++;
+        n_align--;
+    }
+
+}
+
+/* Forward declaration. */
+static int md_process_normal_block_contents(MD_CTX* ctx, const MD_LINE* lines, int n_lines);
+
+static int
+md_process_table_cell(MD_CTX* ctx, MD_BLOCKTYPE cell_type, MD_ALIGN align, OFF beg, OFF end)
+{
+    MD_LINE line;
+    MD_BLOCK_TD_DETAIL det;
+    int ret = 0;
+
+    while(beg < end  &&  ISWHITESPACE(beg))
+        beg++;
+    while(end > beg  &&  ISWHITESPACE(end-1))
+        end--;
+
+    det.align = align;
+    line.beg = beg;
+    line.end = end;
+
+    MD_ENTER_BLOCK(cell_type, &det);
+    MD_CHECK(md_process_normal_block_contents(ctx, &line, 1));
+    MD_LEAVE_BLOCK(cell_type, &det);
+
+abort:
+    return ret;
+}
+
+static int
+md_process_table_row(MD_CTX* ctx, MD_BLOCKTYPE cell_type, OFF beg, OFF end,
+                     const MD_ALIGN* align, int col_count)
+{
+    MD_LINE line;
+    OFF* pipe_offs = NULL;
+    int i, j, k, n;
+    int ret = 0;
+
+    line.beg = beg;
+    line.end = end;
+
+    /* Break the line into table cells by identifying pipe characters who
+     * form the cell boundary. */
+    MD_CHECK(md_analyze_inlines(ctx, &line, 1, TRUE));
+
+    /* We have to remember the cell boundaries in local buffer because
+     * ctx->marks[] shall be reused during cell contents processing. */
+    n = ctx->n_table_cell_boundaries + 2;
+    pipe_offs = (OFF*) malloc(n * sizeof(OFF));
+    if(pipe_offs == NULL) {
+        MD_LOG("malloc() failed.");
+        ret = -1;
+        goto abort;
+    }
+    j = 0;
+    pipe_offs[j++] = beg;
+    for(i = TABLECELLBOUNDARIES.head; i >= 0; i = ctx->marks[i].next) {
+        MD_MARK* mark = &ctx->marks[i];
+        pipe_offs[j++] = mark->end;
+    }
+    pipe_offs[j++] = end+1;
+
+    /* Process cells. */
+    MD_ENTER_BLOCK(MD_BLOCK_TR, NULL);
+    k = 0;
+    for(i = 0; i < j-1  &&  k < col_count; i++) {
+        if(pipe_offs[i] < pipe_offs[i+1]-1)
+            MD_CHECK(md_process_table_cell(ctx, cell_type, align[k++], pipe_offs[i], pipe_offs[i+1]-1));
+    }
+    /* Make sure we call enough table cells even if the current table contains
+     * too few of them. */
+    while(k < col_count)
+        MD_CHECK(md_process_table_cell(ctx, cell_type, align[k++], 0, 0));
+    MD_LEAVE_BLOCK(MD_BLOCK_TR, NULL);
+
+abort:
+    free(pipe_offs);
+
+    /* Free any temporary memory blocks stored within some dummy marks. */
+    for(i = PTR_CHAIN.head; i >= 0; i = ctx->marks[i].next)
+        free(md_mark_get_ptr(ctx, i));
+    PTR_CHAIN.head = -1;
+    PTR_CHAIN.tail = -1;
+
+    return ret;
+}
+
+static int
+md_process_table_block_contents(MD_CTX* ctx, int col_count, const MD_LINE* lines, int n_lines)
+{
+    MD_ALIGN* align;
+    int i;
+    int ret = 0;
+
+    /* At least two lines have to be present: The column headers and the line
+     * with the underlines. */
+    MD_ASSERT(n_lines >= 2);
+
+    align = malloc(col_count * sizeof(MD_ALIGN));
+    if(align == NULL) {
+        MD_LOG("malloc() failed.");
+        ret = -1;
+        goto abort;
+    }
+
+    md_analyze_table_alignment(ctx, lines[1].beg, lines[1].end, align, col_count);
+
+    MD_ENTER_BLOCK(MD_BLOCK_THEAD, NULL);
+    MD_CHECK(md_process_table_row(ctx, MD_BLOCK_TH,
+                        lines[0].beg, lines[0].end, align, col_count));
+    MD_LEAVE_BLOCK(MD_BLOCK_THEAD, NULL);
+
+    if(n_lines > 2) {
+        MD_ENTER_BLOCK(MD_BLOCK_TBODY, NULL);
+        for(i = 2; i < n_lines; i++) {
+            MD_CHECK(md_process_table_row(ctx, MD_BLOCK_TD,
+                     lines[i].beg, lines[i].end, align, col_count));
+        }
+        MD_LEAVE_BLOCK(MD_BLOCK_TBODY, NULL);
+    }
+
+abort:
+    free(align);
+    return ret;
+}
+
+
+/**************************
+ ***  Processing Block  ***
+ **************************/
+
+#define MD_BLOCK_CONTAINER_OPENER   0x01
+#define MD_BLOCK_CONTAINER_CLOSER   0x02
+#define MD_BLOCK_CONTAINER          (MD_BLOCK_CONTAINER_OPENER | MD_BLOCK_CONTAINER_CLOSER)
+#define MD_BLOCK_LOOSE_LIST         0x04
+#define MD_BLOCK_SETEXT_HEADER      0x08
+
+struct MD_BLOCK_tag {
+    MD_BLOCKTYPE type  :  8;
+    unsigned flags     :  8;
+
+    /* MD_BLOCK_H:      Header level (1 - 6)
+     * MD_BLOCK_CODE:   Non-zero if fenced, zero if indented.
+     * MD_BLOCK_LI:     Task mark character (0 if not task list item, 'x', 'X' or ' ').
+     * MD_BLOCK_TABLE:  Column count (as determined by the table underline).
+     */
+    unsigned data      : 16;
+
+    /* Leaf blocks:     Count of lines (MD_LINE or MD_VERBATIMLINE) on the block.
+     * MD_BLOCK_LI:     Task mark offset in the input doc.
+     * MD_BLOCK_OL:     Start item number.
+     */
+    unsigned n_lines;
+};
+
+struct MD_CONTAINER_tag {
+    CHAR ch;
+    unsigned is_loose    : 8;
+    unsigned is_task     : 8;
+    unsigned start;
+    unsigned mark_indent;
+    unsigned contents_indent;
+    OFF block_byte_off;
+    OFF task_mark_off;
+};
+
+
+static int
+md_process_normal_block_contents(MD_CTX* ctx, const MD_LINE* lines, int n_lines)
+{
+    int i;
+    int ret;
+
+    MD_CHECK(md_analyze_inlines(ctx, lines, n_lines, FALSE));
+    MD_CHECK(md_process_inlines(ctx, lines, n_lines));
+
+abort:
+    /* Free any temporary memory blocks stored within some dummy marks. */
+    for(i = PTR_CHAIN.head; i >= 0; i = ctx->marks[i].next)
+        free(md_mark_get_ptr(ctx, i));
+    PTR_CHAIN.head = -1;
+    PTR_CHAIN.tail = -1;
+
+    return ret;
+}
+
+static int
+md_process_verbatim_block_contents(MD_CTX* ctx, MD_TEXTTYPE text_type, const MD_VERBATIMLINE* lines, int n_lines)
+{
+    static const CHAR indent_chunk_str[] = _T("                ");
+    static const SZ indent_chunk_size = SIZEOF_ARRAY(indent_chunk_str) - 1;
+
+    int i;
+    int ret = 0;
+
+    for(i = 0; i < n_lines; i++) {
+        const MD_VERBATIMLINE* line = &lines[i];
+        int indent = line->indent;
+
+        MD_ASSERT(indent >= 0);
+
+        /* Output code indentation. */
+        while(indent > (int) indent_chunk_size) {
+            MD_TEXT(text_type, indent_chunk_str, indent_chunk_size);
+            indent -= indent_chunk_size;
+        }
+        if(indent > 0)
+            MD_TEXT(text_type, indent_chunk_str, indent);
+
+        /* Output the code line itself. */
+        MD_TEXT_INSECURE(text_type, STR(line->beg), line->end - line->beg);
+
+        /* Enforce end-of-line. */
+        MD_TEXT(text_type, _T("\n"), 1);
+    }
+
+abort:
+    return ret;
+}
+
+static int
+md_process_code_block_contents(MD_CTX* ctx, int is_fenced, const MD_VERBATIMLINE* lines, int n_lines)
+{
+    if(is_fenced) {
+        /* Skip the first line in case of fenced code: It is the fence.
+         * (Only the starting fence is present due to logic in md_analyze_line().) */
+        lines++;
+        n_lines--;
+    } else {
+        /* Ignore blank lines at start/end of indented code block. */
+        while(n_lines > 0  &&  lines[0].beg == lines[0].end) {
+            lines++;
+            n_lines--;
+        }
+        while(n_lines > 0  &&  lines[n_lines-1].beg == lines[n_lines-1].end) {
+            n_lines--;
+        }
+    }
+
+    if(n_lines == 0)
+        return 0;
+
+    return md_process_verbatim_block_contents(ctx, MD_TEXT_CODE, lines, n_lines);
+}
+
+static int
+md_setup_fenced_code_detail(MD_CTX* ctx, const MD_BLOCK* block, MD_BLOCK_CODE_DETAIL* det,
+                            MD_ATTRIBUTE_BUILD* info_build, MD_ATTRIBUTE_BUILD* lang_build)
+{
+    const MD_VERBATIMLINE* fence_line = (const MD_VERBATIMLINE*)(block + 1);
+    OFF beg = fence_line->beg;
+    OFF end = fence_line->end;
+    OFF lang_end;
+    CHAR fence_ch = CH(fence_line->beg);
+    int ret = 0;
+
+    /* Skip the fence itself. */
+    while(beg < ctx->size  &&  CH(beg) == fence_ch)
+        beg++;
+    /* Trim initial spaces. */
+    while(beg < ctx->size  &&  CH(beg) == _T(' '))
+        beg++;
+
+    /* Trim trailing spaces. */
+    while(end > beg  &&  CH(end-1) == _T(' '))
+        end--;
+
+    /* Build info string attribute. */
+    MD_CHECK(md_build_attribute(ctx, STR(beg), end - beg, 0, &det->info, info_build));
+
+    /* Build info string attribute. */
+    lang_end = beg;
+    while(lang_end < end  &&  !ISWHITESPACE(lang_end))
+        lang_end++;
+    MD_CHECK(md_build_attribute(ctx, STR(beg), lang_end - beg, 0, &det->lang, lang_build));
+
+    det->fence_char = fence_ch;
+
+abort:
+    return ret;
+}
+
+static int
+md_process_leaf_block(MD_CTX* ctx, const MD_BLOCK* block)
+{
+    union {
+        MD_BLOCK_H_DETAIL header;
+        MD_BLOCK_CODE_DETAIL code;
+        MD_BLOCK_TABLE_DETAIL table;
+    } det;
+    MD_ATTRIBUTE_BUILD info_build;
+    MD_ATTRIBUTE_BUILD lang_build;
+    int is_in_tight_list;
+    int clean_fence_code_detail = FALSE;
+    int ret = 0;
+
+    memset(&det, 0, sizeof(det));
+
+    if(ctx->n_containers == 0)
+        is_in_tight_list = FALSE;
+    else
+        is_in_tight_list = !ctx->containers[ctx->n_containers-1].is_loose;
+
+    switch(block->type) {
+        case MD_BLOCK_H:
+            det.header.level = block->data;
+            break;
+
+        case MD_BLOCK_CODE:
+            /* For fenced code block, we may need to set the info string. */
+            if(block->data != 0) {
+                memset(&det.code, 0, sizeof(MD_BLOCK_CODE_DETAIL));
+                clean_fence_code_detail = TRUE;
+                MD_CHECK(md_setup_fenced_code_detail(ctx, block, &det.code, &info_build, &lang_build));
+            }
+            break;
+
+        case MD_BLOCK_TABLE:
+            det.table.col_count = block->data;
+            det.table.head_row_count = 1;
+            det.table.body_row_count = block->n_lines - 2;
+            break;
+
+        default:
+            /* Noop. */
+            break;
+    }
+
+    if(!is_in_tight_list  ||  block->type != MD_BLOCK_P)
+        MD_ENTER_BLOCK(block->type, (void*) &det);
+
+    /* Process the block contents accordingly to is type. */
+    switch(block->type) {
+        case MD_BLOCK_HR:
+            /* noop */
+            break;
+
+        case MD_BLOCK_CODE:
+            MD_CHECK(md_process_code_block_contents(ctx, (block->data != 0),
+                            (const MD_VERBATIMLINE*)(block + 1), block->n_lines));
+            break;
+
+        case MD_BLOCK_HTML:
+            MD_CHECK(md_process_verbatim_block_contents(ctx, MD_TEXT_HTML,
+                            (const MD_VERBATIMLINE*)(block + 1), block->n_lines));
+            break;
+
+        case MD_BLOCK_TABLE:
+            MD_CHECK(md_process_table_block_contents(ctx, block->data,
+                            (const MD_LINE*)(block + 1), block->n_lines));
+            break;
+
+        default:
+            MD_CHECK(md_process_normal_block_contents(ctx,
+                            (const MD_LINE*)(block + 1), block->n_lines));
+            break;
+    }
+
+    if(!is_in_tight_list  ||  block->type != MD_BLOCK_P)
+        MD_LEAVE_BLOCK(block->type, (void*) &det);
+
+abort:
+    if(clean_fence_code_detail) {
+        md_free_attribute(ctx, &info_build);
+        md_free_attribute(ctx, &lang_build);
+    }
+    return ret;
+}
+
+static int
+md_process_all_blocks(MD_CTX* ctx)
+{
+    int byte_off = 0;
+    int ret = 0;
+
+    /* ctx->containers now is not needed for detection of lists and list items
+     * so we reuse it for tracking what lists are loose or tight. We rely
+     * on the fact the vector is large enough to hold the deepest nesting
+     * level of lists. */
+    ctx->n_containers = 0;
+
+    while(byte_off < ctx->n_block_bytes) {
+        MD_BLOCK* block = (MD_BLOCK*)((char*)ctx->block_bytes + byte_off);
+        union {
+            MD_BLOCK_UL_DETAIL ul;
+            MD_BLOCK_OL_DETAIL ol;
+            MD_BLOCK_LI_DETAIL li;
+        } det;
+
+        switch(block->type) {
+            case MD_BLOCK_UL:
+                det.ul.is_tight = (block->flags & MD_BLOCK_LOOSE_LIST) ? FALSE : TRUE;
+                det.ul.mark = (CHAR) block->data;
+                break;
+
+            case MD_BLOCK_OL:
+                det.ol.start = block->n_lines;
+                det.ol.is_tight =  (block->flags & MD_BLOCK_LOOSE_LIST) ? FALSE : TRUE;
+                det.ol.mark_delimiter = (CHAR) block->data;
+                break;
+
+            case MD_BLOCK_LI:
+                det.li.is_task = (block->data != 0);
+                det.li.task_mark = (CHAR) block->data;
+                det.li.task_mark_offset = (OFF) block->n_lines;
+                break;
+
+            default:
+                /* noop */
+                break;
+        }
+
+        if(block->flags & MD_BLOCK_CONTAINER) {
+            if(block->flags & MD_BLOCK_CONTAINER_CLOSER) {
+                MD_LEAVE_BLOCK(block->type, &det);
+
+                if(block->type == MD_BLOCK_UL || block->type == MD_BLOCK_OL || block->type == MD_BLOCK_QUOTE)
+                    ctx->n_containers--;
+            }
+
+            if(block->flags & MD_BLOCK_CONTAINER_OPENER) {
+                MD_ENTER_BLOCK(block->type, &det);
+
+                if(block->type == MD_BLOCK_UL || block->type == MD_BLOCK_OL) {
+                    ctx->containers[ctx->n_containers].is_loose = (block->flags & MD_BLOCK_LOOSE_LIST);
+                    ctx->n_containers++;
+                } else if(block->type == MD_BLOCK_QUOTE) {
+                    /* This causes that any text in a block quote, even if
+                     * nested inside a tight list item, is wrapped with
+                     * 
        ...
        . */
+                    ctx->containers[ctx->n_containers].is_loose = TRUE;
+                    ctx->n_containers++;
+                }
+            }
+        } else {
+            MD_CHECK(md_process_leaf_block(ctx, block));
+
+            if(block->type == MD_BLOCK_CODE || block->type == MD_BLOCK_HTML)
+                byte_off += block->n_lines * sizeof(MD_VERBATIMLINE);
+            else
+                byte_off += block->n_lines * sizeof(MD_LINE);
+        }
+
+        byte_off += sizeof(MD_BLOCK);
+    }
+
+    ctx->n_block_bytes = 0;
+
+abort:
+    return ret;
+}
+
+
+/************************************
+ ***  Grouping Lines into Blocks  ***
+ ************************************/
+
+static void*
+md_push_block_bytes(MD_CTX* ctx, int n_bytes)
+{
+    void* ptr;
+
+    if(ctx->n_block_bytes + n_bytes > ctx->alloc_block_bytes) {
+        void* new_block_bytes;
+
+        ctx->alloc_block_bytes = (ctx->alloc_block_bytes > 0
+                ? ctx->alloc_block_bytes + ctx->alloc_block_bytes / 2
+                : 512);
+        new_block_bytes = realloc(ctx->block_bytes, ctx->alloc_block_bytes);
+        if(new_block_bytes == NULL) {
+            MD_LOG("realloc() failed.");
+            return NULL;
+        }
+
+        /* Fix the ->current_block after the reallocation. */
+        if(ctx->current_block != NULL) {
+            OFF off_current_block = (OFF) ((char*) ctx->current_block - (char*) ctx->block_bytes);
+            ctx->current_block = (MD_BLOCK*) ((char*) new_block_bytes + off_current_block);
+        }
+
+        ctx->block_bytes = new_block_bytes;
+    }
+
+    ptr = (char*)ctx->block_bytes + ctx->n_block_bytes;
+    ctx->n_block_bytes += n_bytes;
+    return ptr;
+}
+
+static int
+md_start_new_block(MD_CTX* ctx, const MD_LINE_ANALYSIS* line)
+{
+    MD_BLOCK* block;
+
+    MD_ASSERT(ctx->current_block == NULL);
+
+    block = (MD_BLOCK*) md_push_block_bytes(ctx, sizeof(MD_BLOCK));
+    if(block == NULL)
+        return -1;
+
+    switch(line->type) {
+        case MD_LINE_HR:
+            block->type = MD_BLOCK_HR;
+            break;
+
+        case MD_LINE_ATXHEADER:
+        case MD_LINE_SETEXTHEADER:
+            block->type = MD_BLOCK_H;
+            break;
+
+        case MD_LINE_FENCEDCODE:
+        case MD_LINE_INDENTEDCODE:
+            block->type = MD_BLOCK_CODE;
+            break;
+
+        case MD_LINE_TEXT:
+            block->type = MD_BLOCK_P;
+            break;
+
+        case MD_LINE_HTML:
+            block->type = MD_BLOCK_HTML;
+            break;
+
+        case MD_LINE_BLANK:
+        case MD_LINE_SETEXTUNDERLINE:
+        case MD_LINE_TABLEUNDERLINE:
+        default:
+            MD_UNREACHABLE();
+            break;
+    }
+
+    block->flags = 0;
+    block->data = line->data;
+    block->n_lines = 0;
+
+    ctx->current_block = block;
+    return 0;
+}
+
+/* Eat from start of current (textual) block any reference definitions and
+ * remember them so we can resolve any links referring to them.
+ *
+ * (Reference definitions can only be at start of it as they cannot break
+ * a paragraph.)
+ */
+static int
+md_consume_link_reference_definitions(MD_CTX* ctx)
+{
+    MD_LINE* lines = (MD_LINE*) (ctx->current_block + 1);
+    int n_lines = ctx->current_block->n_lines;
+    int n = 0;
+
+    /* Compute how many lines at the start of the block form one or more
+     * reference definitions. */
+    while(n < n_lines) {
+        int n_link_ref_lines;
+
+        n_link_ref_lines = md_is_link_reference_definition(ctx,
+                                    lines + n, n_lines - n);
+        /* Not a reference definition? */
+        if(n_link_ref_lines == 0)
+            break;
+
+        /* We fail if it is the ref. def. but it could not be stored due
+         * a memory allocation error. */
+        if(n_link_ref_lines < 0)
+            return -1;
+
+        n += n_link_ref_lines;
+    }
+
+    /* If there was at least one reference definition, we need to remove
+     * its lines from the block, or perhaps even the whole block. */
+    if(n > 0) {
+        if(n == n_lines) {
+            /* Remove complete block. */
+            ctx->n_block_bytes -= n * sizeof(MD_LINE);
+            ctx->n_block_bytes -= sizeof(MD_BLOCK);
+            ctx->current_block = NULL;
+        } else {
+            /* Remove just some initial lines from the block. */
+            memmove(lines, lines + n, (n_lines - n) * sizeof(MD_LINE));
+            ctx->current_block->n_lines -= n;
+            ctx->n_block_bytes -= n * sizeof(MD_LINE);
+        }
+    }
+
+    return 0;
+}
+
+static int
+md_end_current_block(MD_CTX* ctx)
+{
+    int ret = 0;
+
+    if(ctx->current_block == NULL)
+        return ret;
+
+    /* Check whether there is a reference definition. (We do this here instead
+     * of in md_analyze_line() because reference definition can take multiple
+     * lines.) */
+    if(ctx->current_block->type == MD_BLOCK_P  ||
+       (ctx->current_block->type == MD_BLOCK_H  &&  (ctx->current_block->flags & MD_BLOCK_SETEXT_HEADER)))
+    {
+        MD_LINE* lines = (MD_LINE*) (ctx->current_block + 1);
+        if(CH(lines[0].beg) == _T('[')) {
+            MD_CHECK(md_consume_link_reference_definitions(ctx));
+            if(ctx->current_block == NULL)
+                return ret;
+        }
+    }
+
+    if(ctx->current_block->type == MD_BLOCK_H  &&  (ctx->current_block->flags & MD_BLOCK_SETEXT_HEADER)) {
+        int n_lines = ctx->current_block->n_lines;
+
+        if(n_lines > 1) {
+            /* Get rid of the underline. */
+            ctx->current_block->n_lines--;
+            ctx->n_block_bytes -= sizeof(MD_LINE);
+        } else {
+            /* Only the underline has left after eating the ref. defs.
+             * Keep the line as beginning of a new ordinary paragraph. */
+            ctx->current_block->type = MD_BLOCK_P;
+            return 0;
+        }
+    }
+
+    /* Mark we are not building any block anymore. */
+    ctx->current_block = NULL;
+
+abort:
+    return ret;
+}
+
+static int
+md_add_line_into_current_block(MD_CTX* ctx, const MD_LINE_ANALYSIS* analysis)
+{
+    MD_ASSERT(ctx->current_block != NULL);
+
+    if(ctx->current_block->type == MD_BLOCK_CODE || ctx->current_block->type == MD_BLOCK_HTML) {
+        MD_VERBATIMLINE* line;
+
+        line = (MD_VERBATIMLINE*) md_push_block_bytes(ctx, sizeof(MD_VERBATIMLINE));
+        if(line == NULL)
+            return -1;
+
+        line->indent = analysis->indent;
+        line->beg = analysis->beg;
+        line->end = analysis->end;
+    } else {
+        MD_LINE* line;
+
+        line = (MD_LINE*) md_push_block_bytes(ctx, sizeof(MD_LINE));
+        if(line == NULL)
+            return -1;
+
+        line->beg = analysis->beg;
+        line->end = analysis->end;
+    }
+    ctx->current_block->n_lines++;
+
+    return 0;
+}
+
+static int
+md_push_container_bytes(MD_CTX* ctx, MD_BLOCKTYPE type, unsigned start,
+                        unsigned data, unsigned flags)
+{
+    MD_BLOCK* block;
+    int ret = 0;
+
+    MD_CHECK(md_end_current_block(ctx));
+
+    block = (MD_BLOCK*) md_push_block_bytes(ctx, sizeof(MD_BLOCK));
+    if(block == NULL)
+        return -1;
+
+    block->type = type;
+    block->flags = flags;
+    block->data = data;
+    block->n_lines = start;
+
+abort:
+    return ret;
+}
+
+
+
+/***********************
+ ***  Line Analysis  ***
+ ***********************/
+
+static int
+md_is_hr_line(MD_CTX* ctx, OFF beg, OFF* p_end, OFF* p_killer)
+{
+    OFF off = beg + 1;
+    int n = 1;
+
+    while(off < ctx->size  &&  (CH(off) == CH(beg) || CH(off) == _T(' ') || CH(off) == _T('\t'))) {
+        if(CH(off) == CH(beg))
+            n++;
+        off++;
+    }
+
+    if(n < 3) {
+        *p_killer = off;
+        return FALSE;
+    }
+
+    /* Nothing else can be present on the line. */
+    if(off < ctx->size  &&  !ISNEWLINE(off)) {
+        *p_killer = off;
+        return FALSE;
+    }
+
+    *p_end = off;
+    return TRUE;
+}
+
+static int
+md_is_atxheader_line(MD_CTX* ctx, OFF beg, OFF* p_beg, OFF* p_end, unsigned* p_level)
+{
+    int n;
+    OFF off = beg + 1;
+
+    while(off < ctx->size  &&  CH(off) == _T('#')  &&  off - beg < 7)
+        off++;
+    n = off - beg;
+
+    if(n > 6)
+        return FALSE;
+    *p_level = n;
+
+    if(!(ctx->parser.flags & MD_FLAG_PERMISSIVEATXHEADERS)  &&  off < ctx->size  &&
+       CH(off) != _T(' ')  &&  CH(off) != _T('\t')  &&  !ISNEWLINE(off))
+        return FALSE;
+
+    while(off < ctx->size  &&  CH(off) == _T(' '))
+        off++;
+    *p_beg = off;
+    *p_end = off;
+    return TRUE;
+}
+
+static int
+md_is_setext_underline(MD_CTX* ctx, OFF beg, OFF* p_end, unsigned* p_level)
+{
+    OFF off = beg + 1;
+
+    while(off < ctx->size  &&  CH(off) == CH(beg))
+        off++;
+
+    /* Optionally, space(s) can follow. */
+    while(off < ctx->size  &&  CH(off) == _T(' '))
+        off++;
+
+    /* But nothing more is allowed on the line. */
+    if(off < ctx->size  &&  !ISNEWLINE(off))
+        return FALSE;
+
+    *p_level = (CH(beg) == _T('=') ? 1 : 2);
+    *p_end = off;
+    return TRUE;
+}
+
+static int
+md_is_table_underline(MD_CTX* ctx, OFF beg, OFF* p_end, unsigned* p_col_count)
+{
+    OFF off = beg;
+    int found_pipe = FALSE;
+    unsigned col_count = 0;
+
+    if(off < ctx->size  &&  CH(off) == _T('|')) {
+        found_pipe = TRUE;
+        off++;
+        while(off < ctx->size  &&  ISWHITESPACE(off))
+            off++;
+    }
+
+    while(1) {
+        OFF cell_beg;
+        int delimited = FALSE;
+
+        /* Cell underline ("-----", ":----", "----:" or ":----:") */
+        cell_beg = off;
+        if(off < ctx->size  &&  CH(off) == _T(':'))
+            off++;
+        while(off < ctx->size  &&  CH(off) == _T('-'))
+            off++;
+        if(off < ctx->size  &&  CH(off) == _T(':'))
+            off++;
+        if(off - cell_beg < 3)
+            return FALSE;
+
+        col_count++;
+
+        /* Pipe delimiter (optional at the end of line). */
+        while(off < ctx->size  &&  ISWHITESPACE(off))
+            off++;
+        if(off < ctx->size  &&  CH(off) == _T('|')) {
+            delimited = TRUE;
+            found_pipe =  TRUE;
+            off++;
+            while(off < ctx->size  &&  ISWHITESPACE(off))
+                off++;
+        }
+
+        /* Success, if we reach end of line. */
+        if(off >= ctx->size  ||  ISNEWLINE(off))
+            break;
+
+        if(!delimited)
+            return FALSE;
+    }
+
+    if(!found_pipe)
+        return FALSE;
+
+    *p_end = off;
+    *p_col_count = col_count;
+    return TRUE;
+}
+
+static int
+md_is_opening_code_fence(MD_CTX* ctx, OFF beg, OFF* p_end)
+{
+    OFF off = beg;
+
+    while(off < ctx->size && CH(off) == CH(beg))
+        off++;
+
+    /* Fence must have at least three characters. */
+    if(off - beg < 3)
+        return FALSE;
+
+    ctx->code_fence_length = off - beg;
+
+    /* Optionally, space(s) can follow. */
+    while(off < ctx->size  &&  CH(off) == _T(' '))
+        off++;
+
+    /* Optionally, an info string can follow. */
+    while(off < ctx->size  &&  !ISNEWLINE(off)) {
+        /* Backtick-based fence must not contain '`' in the info string. */
+        if(CH(beg) == _T('`')  &&  CH(off) == _T('`'))
+            return FALSE;
+        off++;
+    }
+
+    *p_end = off;
+    return TRUE;
+}
+
+static int
+md_is_closing_code_fence(MD_CTX* ctx, CHAR ch, OFF beg, OFF* p_end)
+{
+    OFF off = beg;
+    int ret = FALSE;
+
+    /* Closing fence must have at least the same length and use same char as
+     * opening one. */
+    while(off < ctx->size  &&  CH(off) == ch)
+        off++;
+    if(off - beg < ctx->code_fence_length)
+        goto out;
+
+    /* Optionally, space(s) can follow */
+    while(off < ctx->size  &&  CH(off) == _T(' '))
+        off++;
+
+    /* But nothing more is allowed on the line. */
+    if(off < ctx->size  &&  !ISNEWLINE(off))
+        goto out;
+
+    ret = TRUE;
+
+out:
+    /* Note we set *p_end even on failure: If we are not closing fence, caller
+     * would eat the line anyway without any parsing. */
+    *p_end = off;
+    return ret;
+}
+
+/* Returns type of the raw HTML block, or FALSE if it is not HTML block.
+ * (Refer to CommonMark specification for details about the types.)
+ */
+static int
+md_is_html_block_start_condition(MD_CTX* ctx, OFF beg)
+{
+    typedef struct TAG_tag TAG;
+    struct TAG_tag {
+        const CHAR* name;
+        unsigned len    : 8;
+    };
+
+    /* Type 6 is started by a long list of allowed tags. We use two-level
+     * tree to speed-up the search. */
+#ifdef X
+    #undef X
+#endif
+#define X(name)     { _T(name), (sizeof(name)-1) / sizeof(CHAR) }
+#define Xend        { NULL, 0 }
+    static const TAG t1[] = { X("pre"), X("script"), X("style"), X("textarea"), Xend };
+
+    static const TAG a6[] = { X("address"), X("article"), X("aside"), Xend };
+    static const TAG b6[] = { X("base"), X("basefont"), X("blockquote"), X("body"), Xend };
+    static const TAG c6[] = { X("caption"), X("center"), X("col"), X("colgroup"), Xend };
+    static const TAG d6[] = { X("dd"), X("details"), X("dialog"), X("dir"),
+                              X("div"), X("dl"), X("dt"), Xend };
+    static const TAG f6[] = { X("fieldset"), X("figcaption"), X("figure"), X("footer"),
+                              X("form"), X("frame"), X("frameset"), Xend };
+    static const TAG h6[] = { X("h1"), X("head"), X("header"), X("hr"), X("html"), Xend };
+    static const TAG i6[] = { X("iframe"), Xend };
+    static const TAG l6[] = { X("legend"), X("li"), X("link"), Xend };
+    static const TAG m6[] = { X("main"), X("menu"), X("menuitem"), Xend };
+    static const TAG n6[] = { X("nav"), X("noframes"), Xend };
+    static const TAG o6[] = { X("ol"), X("optgroup"), X("option"), Xend };
+    static const TAG p6[] = { X("p"), X("param"), Xend };
+    static const TAG s6[] = { X("section"), X("source"), X("summary"), Xend };
+    static const TAG t6[] = { X("table"), X("tbody"), X("td"), X("tfoot"), X("th"),
+                              X("thead"), X("title"), X("tr"), X("track"), Xend };
+    static const TAG u6[] = { X("ul"), Xend };
+    static const TAG xx[] = { Xend };
+#undef X
+
+    static const TAG* map6[26] = {
+        a6, b6, c6, d6, xx, f6, xx, h6, i6, xx, xx, l6, m6,
+        n6, o6, p6, xx, xx, s6, t6, u6, xx, xx, xx, xx, xx
+    };
+    OFF off = beg + 1;
+    int i;
+
+    /* Check for type 1: size) {
+            if(md_ascii_case_eq(STR(off), t1[i].name, t1[i].len))
+                return 1;
+        }
+    }
+
+    /* Check for type 2: "), 3, p_end) ? 2 : FALSE);
+
+        case 3:
+            return (md_line_contains(ctx, beg, _T("?>"), 2, p_end) ? 3 : FALSE);
+
+        case 4:
+            return (md_line_contains(ctx, beg, _T(">"), 1, p_end) ? 4 : FALSE);
+
+        case 5:
+            return (md_line_contains(ctx, beg, _T("]]>"), 3, p_end) ? 5 : FALSE);
+
+        case 6:     /* Pass through */
+        case 7:
+            *p_end = beg;
+            return (ISNEWLINE(beg) ? ctx->html_block_type : FALSE);
+
+        default:
+            MD_UNREACHABLE();
+    }
+    return FALSE;
+}
+
+
+static int
+md_is_container_compatible(const MD_CONTAINER* pivot, const MD_CONTAINER* container)
+{
+    /* Block quote has no "items" like lists. */
+    if(container->ch == _T('>'))
+        return FALSE;
+
+    if(container->ch != pivot->ch)
+        return FALSE;
+    if(container->mark_indent > pivot->contents_indent)
+        return FALSE;
+
+    return TRUE;
+}
+
+static int
+md_push_container(MD_CTX* ctx, const MD_CONTAINER* container)
+{
+    if(ctx->n_containers >= ctx->alloc_containers) {
+        MD_CONTAINER* new_containers;
+
+        ctx->alloc_containers = (ctx->alloc_containers > 0
+                ? ctx->alloc_containers + ctx->alloc_containers / 2
+                : 16);
+        new_containers = realloc(ctx->containers, ctx->alloc_containers * sizeof(MD_CONTAINER));
+        if(new_containers == NULL) {
+            MD_LOG("realloc() failed.");
+            return -1;
+        }
+
+        ctx->containers = new_containers;
+    }
+
+    memcpy(&ctx->containers[ctx->n_containers++], container, sizeof(MD_CONTAINER));
+    return 0;
+}
+
+static int
+md_enter_child_containers(MD_CTX* ctx, int n_children)
+{
+    int i;
+    int ret = 0;
+
+    for(i = ctx->n_containers - n_children; i < ctx->n_containers; i++) {
+        MD_CONTAINER* c = &ctx->containers[i];
+        int is_ordered_list = FALSE;
+
+        switch(c->ch) {
+            case _T(')'):
+            case _T('.'):
+                is_ordered_list = TRUE;
+                MD_FALLTHROUGH();
+
+            case _T('-'):
+            case _T('+'):
+            case _T('*'):
+                /* Remember offset in ctx->block_bytes so we can revisit the
+                 * block if we detect it is a loose list. */
+                md_end_current_block(ctx);
+                c->block_byte_off = ctx->n_block_bytes;
+
+                MD_CHECK(md_push_container_bytes(ctx,
+                                (is_ordered_list ? MD_BLOCK_OL : MD_BLOCK_UL),
+                                c->start, c->ch, MD_BLOCK_CONTAINER_OPENER));
+                MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_LI,
+                                c->task_mark_off,
+                                (c->is_task ? CH(c->task_mark_off) : 0),
+                                MD_BLOCK_CONTAINER_OPENER));
+                break;
+
+            case _T('>'):
+                MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_QUOTE, 0, 0, MD_BLOCK_CONTAINER_OPENER));
+                break;
+
+            default:
+                MD_UNREACHABLE();
+                break;
+        }
+    }
+
+abort:
+    return ret;
+}
+
+static int
+md_leave_child_containers(MD_CTX* ctx, int n_keep)
+{
+    int ret = 0;
+
+    while(ctx->n_containers > n_keep) {
+        MD_CONTAINER* c = &ctx->containers[ctx->n_containers-1];
+        int is_ordered_list = FALSE;
+
+        switch(c->ch) {
+            case _T(')'):
+            case _T('.'):
+                is_ordered_list = TRUE;
+                MD_FALLTHROUGH();
+
+            case _T('-'):
+            case _T('+'):
+            case _T('*'):
+                MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_LI,
+                                c->task_mark_off, (c->is_task ? CH(c->task_mark_off) : 0),
+                                MD_BLOCK_CONTAINER_CLOSER));
+                MD_CHECK(md_push_container_bytes(ctx,
+                                (is_ordered_list ? MD_BLOCK_OL : MD_BLOCK_UL), 0,
+                                c->ch, MD_BLOCK_CONTAINER_CLOSER));
+                break;
+
+            case _T('>'):
+                MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_QUOTE, 0,
+                                0, MD_BLOCK_CONTAINER_CLOSER));
+                break;
+
+            default:
+                MD_UNREACHABLE();
+                break;
+        }
+
+        ctx->n_containers--;
+    }
+
+abort:
+    return ret;
+}
+
+static int
+md_is_container_mark(MD_CTX* ctx, unsigned indent, OFF beg, OFF* p_end, MD_CONTAINER* p_container)
+{
+    OFF off = beg;
+    OFF max_end;
+
+    if(off >= ctx->size  ||  indent >= ctx->code_indent_offset)
+        return FALSE;
+
+    /* Check for block quote mark. */
+    if(CH(off) == _T('>')) {
+        off++;
+        p_container->ch = _T('>');
+        p_container->is_loose = FALSE;
+        p_container->is_task = FALSE;
+        p_container->mark_indent = indent;
+        p_container->contents_indent = indent + 1;
+        *p_end = off;
+        return TRUE;
+    }
+
+    /* Check for list item bullet mark. */
+    if(ISANYOF(off, _T("-+*"))  &&  (off+1 >= ctx->size || ISBLANK(off+1) || ISNEWLINE(off+1))) {
+        p_container->ch = CH(off);
+        p_container->is_loose = FALSE;
+        p_container->is_task = FALSE;
+        p_container->mark_indent = indent;
+        p_container->contents_indent = indent + 1;
+        *p_end = off+1;
+        return TRUE;
+    }
+
+    /* Check for ordered list item marks. */
+    max_end = off + 9;
+    if(max_end > ctx->size)
+        max_end = ctx->size;
+    p_container->start = 0;
+    while(off < max_end  &&  ISDIGIT(off)) {
+        p_container->start = p_container->start * 10 + CH(off) - _T('0');
+        off++;
+    }
+    if(off > beg  &&
+       (CH(off) == _T('.') || CH(off) == _T(')'))  &&
+       (off+1 >= ctx->size || ISBLANK(off+1) || ISNEWLINE(off+1)))
+    {
+        p_container->ch = CH(off);
+        p_container->is_loose = FALSE;
+        p_container->is_task = FALSE;
+        p_container->mark_indent = indent;
+        p_container->contents_indent = indent + off - beg + 1;
+        *p_end = off+1;
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+static unsigned
+md_line_indentation(MD_CTX* ctx, unsigned total_indent, OFF beg, OFF* p_end)
+{
+    OFF off = beg;
+    unsigned indent = total_indent;
+
+    while(off < ctx->size  &&  ISBLANK(off)) {
+        if(CH(off) == _T('\t'))
+            indent = (indent + 4) & ~3;
+        else
+            indent++;
+        off++;
+    }
+
+    *p_end = off;
+    return indent - total_indent;
+}
+
+static const MD_LINE_ANALYSIS md_dummy_blank_line = { MD_LINE_BLANK, 0, 0, 0, 0 };
+
+/* Analyze type of the line and find some its properties. This serves as a
+ * main input for determining type and boundaries of a block. */
+static int
+md_analyze_line(MD_CTX* ctx, OFF beg, OFF* p_end,
+                const MD_LINE_ANALYSIS* pivot_line, MD_LINE_ANALYSIS* line)
+{
+    unsigned total_indent = 0;
+    int n_parents = 0;
+    int n_brothers = 0;
+    int n_children = 0;
+    MD_CONTAINER container = { 0 };
+    int prev_line_has_list_loosening_effect = ctx->last_line_has_list_loosening_effect;
+    OFF off = beg;
+    OFF hr_killer = 0;
+    int ret = 0;
+
+    line->indent = md_line_indentation(ctx, total_indent, off, &off);
+    total_indent += line->indent;
+    line->beg = off;
+
+    /* Given the indentation and block quote marks '>', determine how many of
+     * the current containers are our parents. */
+    while(n_parents < ctx->n_containers) {
+        MD_CONTAINER* c = &ctx->containers[n_parents];
+
+        if(c->ch == _T('>')  &&  line->indent < ctx->code_indent_offset  &&
+            off < ctx->size  &&  CH(off) == _T('>'))
+        {
+            /* Block quote mark. */
+            off++;
+            total_indent++;
+            line->indent = md_line_indentation(ctx, total_indent, off, &off);
+            total_indent += line->indent;
+
+            /* The optional 1st space after '>' is part of the block quote mark. */
+            if(line->indent > 0)
+                line->indent--;
+
+            line->beg = off;
+
+        } else if(c->ch != _T('>')  &&  line->indent >= c->contents_indent) {
+            /* List. */
+            line->indent -= c->contents_indent;
+        } else {
+            break;
+        }
+
+        n_parents++;
+    }
+
+    if(off >= ctx->size  ||  ISNEWLINE(off)) {
+        /* Blank line does not need any real indentation to be nested inside
+         * a list. */
+        if(n_brothers + n_children == 0) {
+            while(n_parents < ctx->n_containers  &&  ctx->containers[n_parents].ch != _T('>'))
+                n_parents++;
+        }
+    }
+
+    while(TRUE) {
+        /* Check whether we are fenced code continuation. */
+        if(pivot_line->type == MD_LINE_FENCEDCODE) {
+            line->beg = off;
+
+            /* We are another MD_LINE_FENCEDCODE unless we are closing fence
+             * which we transform into MD_LINE_BLANK. */
+            if(line->indent < ctx->code_indent_offset) {
+                if(md_is_closing_code_fence(ctx, CH(pivot_line->beg), off, &off)) {
+                    line->type = MD_LINE_BLANK;
+                    ctx->last_line_has_list_loosening_effect = FALSE;
+                    break;
+                }
+            }
+
+            /* Change indentation accordingly to the initial code fence. */
+            if(n_parents == ctx->n_containers) {
+                if(line->indent > pivot_line->indent)
+                    line->indent -= pivot_line->indent;
+                else
+                    line->indent = 0;
+
+                line->type = MD_LINE_FENCEDCODE;
+                break;
+            }
+        }
+
+        /* Check whether we are HTML block continuation. */
+        if(pivot_line->type == MD_LINE_HTML  &&  ctx->html_block_type > 0) {
+            if(n_parents < ctx->n_containers) {
+                /* HTML block is implicitly ended if the enclosing container
+                 * block ends. */
+                ctx->html_block_type = 0;
+            } else {
+                int html_block_type;
+
+                html_block_type = md_is_html_block_end_condition(ctx, off, &off);
+                if(html_block_type > 0) {
+                    MD_ASSERT(html_block_type == ctx->html_block_type);
+
+                    /* Make sure this is the last line of the block. */
+                    ctx->html_block_type = 0;
+
+                    /* Some end conditions serve as blank lines at the same time. */
+                    if(html_block_type == 6 || html_block_type == 7) {
+                        line->type = MD_LINE_BLANK;
+                        line->indent = 0;
+                        break;
+                    }
+                }
+
+                line->type = MD_LINE_HTML;
+                n_parents = ctx->n_containers;
+                break;
+            }
+        }
+
+        /* Check for blank line. */
+        if(off >= ctx->size  ||  ISNEWLINE(off)) {
+            if(pivot_line->type == MD_LINE_INDENTEDCODE  &&  n_parents == ctx->n_containers) {
+                line->type = MD_LINE_INDENTEDCODE;
+                if(line->indent > ctx->code_indent_offset)
+                    line->indent -= ctx->code_indent_offset;
+                else
+                    line->indent = 0;
+                ctx->last_line_has_list_loosening_effect = FALSE;
+            } else {
+                line->type = MD_LINE_BLANK;
+                ctx->last_line_has_list_loosening_effect = (n_parents > 0  &&
+                        n_brothers + n_children == 0  &&
+                        ctx->containers[n_parents-1].ch != _T('>'));
+
+    #if 1
+                /* See https://github.com/mity/md4c/issues/6
+                 *
+                 * This ugly checking tests we are in (yet empty) list item but
+                 * not its very first line (i.e. not the line with the list
+                 * item mark).
+                 *
+                 * If we are such a blank line, then any following non-blank
+                 * line which would be part of the list item actually has to
+                 * end the list because according to the specification, "a list
+                 * item can begin with at most one blank line."
+                 */
+                if(n_parents > 0  &&  ctx->containers[n_parents-1].ch != _T('>')  &&
+                   n_brothers + n_children == 0  &&  ctx->current_block == NULL  &&
+                   ctx->n_block_bytes > (int) sizeof(MD_BLOCK))
+                {
+                    MD_BLOCK* top_block = (MD_BLOCK*) ((char*)ctx->block_bytes + ctx->n_block_bytes - sizeof(MD_BLOCK));
+                    if(top_block->type == MD_BLOCK_LI)
+                        ctx->last_list_item_starts_with_two_blank_lines = TRUE;
+                }
+    #endif
+            }
+            break;
+        } else {
+    #if 1
+            /* This is the 2nd half of the hack. If the flag is set (i.e. there
+             * was a 2nd blank line at the beginning of the list item) and if
+             * we would otherwise still belong to the list item, we enforce
+             * the end of the list. */
+            ctx->last_line_has_list_loosening_effect = FALSE;
+            if(ctx->last_list_item_starts_with_two_blank_lines) {
+                if(n_parents > 0  &&  ctx->containers[n_parents-1].ch != _T('>')  &&
+                   n_brothers + n_children == 0  &&  ctx->current_block == NULL  &&
+                   ctx->n_block_bytes > (int) sizeof(MD_BLOCK))
+                {
+                    MD_BLOCK* top_block = (MD_BLOCK*) ((char*)ctx->block_bytes + ctx->n_block_bytes - sizeof(MD_BLOCK));
+                    if(top_block->type == MD_BLOCK_LI)
+                        n_parents--;
+                }
+
+                ctx->last_list_item_starts_with_two_blank_lines = FALSE;
+            }
+    #endif
+        }
+
+        /* Check whether we are Setext underline. */
+        if(line->indent < ctx->code_indent_offset  &&  pivot_line->type == MD_LINE_TEXT
+            &&  off < ctx->size  &&  ISANYOF2(off, _T('='), _T('-'))
+            &&  (n_parents == ctx->n_containers))
+        {
+            unsigned level;
+
+            if(md_is_setext_underline(ctx, off, &off, &level)) {
+                line->type = MD_LINE_SETEXTUNDERLINE;
+                line->data = level;
+                break;
+            }
+        }
+
+        /* Check for thematic break line. */
+        if(line->indent < ctx->code_indent_offset
+            &&  off < ctx->size  &&  off >= hr_killer
+            &&  ISANYOF(off, _T("-_*")))
+        {
+            if(md_is_hr_line(ctx, off, &off, &hr_killer)) {
+                line->type = MD_LINE_HR;
+                break;
+            }
+        }
+
+        /* Check for "brother" container. I.e. whether we are another list item
+         * in already started list. */
+        if(n_parents < ctx->n_containers  &&  n_brothers + n_children == 0) {
+            OFF tmp;
+
+            if(md_is_container_mark(ctx, line->indent, off, &tmp, &container)  &&
+               md_is_container_compatible(&ctx->containers[n_parents], &container))
+            {
+                pivot_line = &md_dummy_blank_line;
+
+                off = tmp;
+
+                total_indent += container.contents_indent - container.mark_indent;
+                line->indent = md_line_indentation(ctx, total_indent, off, &off);
+                total_indent += line->indent;
+                line->beg = off;
+
+                /* Some of the following whitespace actually still belongs to the mark. */
+                if(off >= ctx->size || ISNEWLINE(off)) {
+                    container.contents_indent++;
+                } else if(line->indent <= ctx->code_indent_offset) {
+                    container.contents_indent += line->indent;
+                    line->indent = 0;
+                } else {
+                    container.contents_indent += 1;
+                    line->indent--;
+                }
+
+                ctx->containers[n_parents].mark_indent = container.mark_indent;
+                ctx->containers[n_parents].contents_indent = container.contents_indent;
+
+                n_brothers++;
+                continue;
+            }
+        }
+
+        /* Check for indented code.
+         * Note indented code block cannot interrupt a paragraph. */
+        if(line->indent >= ctx->code_indent_offset  &&
+            (pivot_line->type == MD_LINE_BLANK || pivot_line->type == MD_LINE_INDENTEDCODE))
+        {
+            line->type = MD_LINE_INDENTEDCODE;
+            MD_ASSERT(line->indent >= ctx->code_indent_offset);
+            line->indent -= ctx->code_indent_offset;
+            line->data = 0;
+            break;
+        }
+
+        /* Check for start of a new container block. */
+        if(line->indent < ctx->code_indent_offset  &&
+           md_is_container_mark(ctx, line->indent, off, &off, &container))
+        {
+            if(pivot_line->type == MD_LINE_TEXT  &&  n_parents == ctx->n_containers  &&
+                        (off >= ctx->size || ISNEWLINE(off))  &&  container.ch != _T('>'))
+            {
+                /* Noop. List mark followed by a blank line cannot interrupt a paragraph. */
+            } else if(pivot_line->type == MD_LINE_TEXT  &&  n_parents == ctx->n_containers  &&
+                        ISANYOF2_(container.ch, _T('.'), _T(')'))  &&  container.start != 1)
+            {
+                /* Noop. Ordered list cannot interrupt a paragraph unless the start index is 1. */
+            } else {
+                total_indent += container.contents_indent - container.mark_indent;
+                line->indent = md_line_indentation(ctx, total_indent, off, &off);
+                total_indent += line->indent;
+
+                line->beg = off;
+                line->data = container.ch;
+
+                /* Some of the following whitespace actually still belongs to the mark. */
+                if(off >= ctx->size || ISNEWLINE(off)) {
+                    container.contents_indent++;
+                } else if(line->indent <= ctx->code_indent_offset) {
+                    container.contents_indent += line->indent;
+                    line->indent = 0;
+                } else {
+                    container.contents_indent += 1;
+                    line->indent--;
+                }
+
+                if(n_brothers + n_children == 0)
+                    pivot_line = &md_dummy_blank_line;
+
+                if(n_children == 0)
+                    MD_CHECK(md_leave_child_containers(ctx, n_parents + n_brothers));
+
+                n_children++;
+                MD_CHECK(md_push_container(ctx, &container));
+                continue;
+            }
+        }
+
+        /* Check whether we are table continuation. */
+        if(pivot_line->type == MD_LINE_TABLE  &&  n_parents == ctx->n_containers) {
+            line->type = MD_LINE_TABLE;
+            break;
+        }
+
+        /* Check for ATX header. */
+        if(line->indent < ctx->code_indent_offset  &&
+                off < ctx->size  &&  CH(off) == _T('#'))
+        {
+            unsigned level;
+
+            if(md_is_atxheader_line(ctx, off, &line->beg, &off, &level)) {
+                line->type = MD_LINE_ATXHEADER;
+                line->data = level;
+                break;
+            }
+        }
+
+        /* Check whether we are starting code fence. */
+        if(off < ctx->size  &&  ISANYOF2(off, _T('`'), _T('~'))) {
+            if(md_is_opening_code_fence(ctx, off, &off)) {
+                line->type = MD_LINE_FENCEDCODE;
+                line->data = 1;
+                break;
+            }
+        }
+
+        /* Check for start of raw HTML block. */
+        if(off < ctx->size  &&  CH(off) == _T('<')
+            &&  !(ctx->parser.flags & MD_FLAG_NOHTMLBLOCKS))
+        {
+            ctx->html_block_type = md_is_html_block_start_condition(ctx, off);
+
+            /* HTML block type 7 cannot interrupt paragraph. */
+            if(ctx->html_block_type == 7  &&  pivot_line->type == MD_LINE_TEXT)
+                ctx->html_block_type = 0;
+
+            if(ctx->html_block_type > 0) {
+                /* The line itself also may immediately close the block. */
+                if(md_is_html_block_end_condition(ctx, off, &off) == ctx->html_block_type) {
+                    /* Make sure this is the last line of the block. */
+                    ctx->html_block_type = 0;
+                }
+
+                line->type = MD_LINE_HTML;
+                break;
+            }
+        }
+
+        /* Check for table underline. */
+        if((ctx->parser.flags & MD_FLAG_TABLES)  &&  pivot_line->type == MD_LINE_TEXT
+            &&  off < ctx->size  &&  ISANYOF3(off, _T('|'), _T('-'), _T(':'))
+            &&  n_parents == ctx->n_containers)
+        {
+            unsigned col_count;
+
+            if(ctx->current_block != NULL  &&  ctx->current_block->n_lines == 1  &&
+                md_is_table_underline(ctx, off, &off, &col_count))
+            {
+                line->data = col_count;
+                line->type = MD_LINE_TABLEUNDERLINE;
+                break;
+            }
+        }
+
+        /* By default, we are normal text line. */
+        line->type = MD_LINE_TEXT;
+        if(pivot_line->type == MD_LINE_TEXT  &&  n_brothers + n_children == 0) {
+            /* Lazy continuation. */
+            n_parents = ctx->n_containers;
+        }
+
+        /* Check for task mark. */
+        if((ctx->parser.flags & MD_FLAG_TASKLISTS)  &&  n_brothers + n_children > 0  &&
+           ISANYOF_(ctx->containers[ctx->n_containers-1].ch, _T("-+*.)")))
+        {
+            OFF tmp = off;
+
+            while(tmp < ctx->size  &&  tmp < off + 3  &&  ISBLANK(tmp))
+                tmp++;
+            if(tmp + 2 < ctx->size  &&  CH(tmp) == _T('[')  &&
+               ISANYOF(tmp+1, _T("xX "))  &&  CH(tmp+2) == _T(']')  &&
+               (tmp + 3 == ctx->size  ||  ISBLANK(tmp+3)  ||  ISNEWLINE(tmp+3)))
+            {
+                MD_CONTAINER* task_container = (n_children > 0 ? &ctx->containers[ctx->n_containers-1] : &container);
+                task_container->is_task = TRUE;
+                task_container->task_mark_off = tmp + 1;
+                off = tmp + 3;
+                while(ISWHITESPACE(off))
+                    off++;
+                line->beg = off;
+            }
+        }
+
+        break;
+    }
+
+    /* Scan for end of the line.
+     *
+     * Note this is quite a bottleneck of the parsing as we here iterate almost
+     * over compete document.
+     */
+#if defined __linux__ && !defined MD4C_USE_UTF16
+    /* Recent glibc versions have superbly optimized strcspn(), even using
+     * vectorization if available. */
+    if(ctx->doc_ends_with_newline  &&  off < ctx->size) {
+        while(TRUE) {
+            off += (OFF) strcspn(STR(off), "\r\n");
+
+            /* strcspn() can stop on zero terminator; but that can appear
+             * anywhere in the Markfown input... */
+            if(CH(off) == _T('\0'))
+                off++;
+            else
+                break;
+        }
+    } else
+#endif
+    {
+        /* Optimization: Use some loop unrolling. */
+        while(off + 3 < ctx->size  &&  !ISNEWLINE(off+0)  &&  !ISNEWLINE(off+1)
+                                   &&  !ISNEWLINE(off+2)  &&  !ISNEWLINE(off+3))
+            off += 4;
+        while(off < ctx->size  &&  !ISNEWLINE(off))
+            off++;
+    }
+
+    /* Set end of the line. */
+    line->end = off;
+
+    /* But for ATX header, we should exclude the optional trailing mark. */
+    if(line->type == MD_LINE_ATXHEADER) {
+        OFF tmp = line->end;
+        while(tmp > line->beg && CH(tmp-1) == _T(' '))
+            tmp--;
+        while(tmp > line->beg && CH(tmp-1) == _T('#'))
+            tmp--;
+        if(tmp == line->beg || CH(tmp-1) == _T(' ') || (ctx->parser.flags & MD_FLAG_PERMISSIVEATXHEADERS))
+            line->end = tmp;
+    }
+
+    /* Trim trailing spaces. */
+    if(line->type != MD_LINE_INDENTEDCODE  &&  line->type != MD_LINE_FENCEDCODE) {
+        while(line->end > line->beg && CH(line->end-1) == _T(' '))
+            line->end--;
+    }
+
+    /* Eat also the new line. */
+    if(off < ctx->size && CH(off) == _T('\r'))
+        off++;
+    if(off < ctx->size && CH(off) == _T('\n'))
+        off++;
+
+    *p_end = off;
+
+    /* If we belong to a list after seeing a blank line, the list is loose. */
+    if(prev_line_has_list_loosening_effect  &&  line->type != MD_LINE_BLANK  &&  n_parents + n_brothers > 0) {
+        MD_CONTAINER* c = &ctx->containers[n_parents + n_brothers - 1];
+        if(c->ch != _T('>')) {
+            MD_BLOCK* block = (MD_BLOCK*) (((char*)ctx->block_bytes) + c->block_byte_off);
+            block->flags |= MD_BLOCK_LOOSE_LIST;
+        }
+    }
+
+    /* Leave any containers we are not part of anymore. */
+    if(n_children == 0  &&  n_parents + n_brothers < ctx->n_containers)
+        MD_CHECK(md_leave_child_containers(ctx, n_parents + n_brothers));
+
+    /* Enter any container we found a mark for. */
+    if(n_brothers > 0) {
+        MD_ASSERT(n_brothers == 1);
+        MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_LI,
+                    ctx->containers[n_parents].task_mark_off,
+                    (ctx->containers[n_parents].is_task ? CH(ctx->containers[n_parents].task_mark_off) : 0),
+                    MD_BLOCK_CONTAINER_CLOSER));
+        MD_CHECK(md_push_container_bytes(ctx, MD_BLOCK_LI,
+                    container.task_mark_off,
+                    (container.is_task ? CH(container.task_mark_off) : 0),
+                    MD_BLOCK_CONTAINER_OPENER));
+        ctx->containers[n_parents].is_task = container.is_task;
+        ctx->containers[n_parents].task_mark_off = container.task_mark_off;
+    }
+
+    if(n_children > 0)
+        MD_CHECK(md_enter_child_containers(ctx, n_children));
+
+abort:
+    return ret;
+}
+
+static int
+md_process_line(MD_CTX* ctx, const MD_LINE_ANALYSIS** p_pivot_line, MD_LINE_ANALYSIS* line)
+{
+    const MD_LINE_ANALYSIS* pivot_line = *p_pivot_line;
+    int ret = 0;
+
+    /* Blank line ends current leaf block. */
+    if(line->type == MD_LINE_BLANK) {
+        MD_CHECK(md_end_current_block(ctx));
+        *p_pivot_line = &md_dummy_blank_line;
+        return 0;
+    }
+
+    /* Some line types form block on their own. */
+    if(line->type == MD_LINE_HR || line->type == MD_LINE_ATXHEADER) {
+        MD_CHECK(md_end_current_block(ctx));
+
+        /* Add our single-line block. */
+        MD_CHECK(md_start_new_block(ctx, line));
+        MD_CHECK(md_add_line_into_current_block(ctx, line));
+        MD_CHECK(md_end_current_block(ctx));
+        *p_pivot_line = &md_dummy_blank_line;
+        return 0;
+    }
+
+    /* MD_LINE_SETEXTUNDERLINE changes meaning of the current block and ends it. */
+    if(line->type == MD_LINE_SETEXTUNDERLINE) {
+        MD_ASSERT(ctx->current_block != NULL);
+        ctx->current_block->type = MD_BLOCK_H;
+        ctx->current_block->data = line->data;
+        ctx->current_block->flags |= MD_BLOCK_SETEXT_HEADER;
+        MD_CHECK(md_add_line_into_current_block(ctx, line));
+        MD_CHECK(md_end_current_block(ctx));
+        if(ctx->current_block == NULL) {
+            *p_pivot_line = &md_dummy_blank_line;
+        } else {
+            /* This happens if we have consumed all the body as link ref. defs.
+             * and downgraded the underline into start of a new paragraph block. */
+            line->type = MD_LINE_TEXT;
+            *p_pivot_line = line;
+        }
+        return 0;
+    }
+
+    /* MD_LINE_TABLEUNDERLINE changes meaning of the current block. */
+    if(line->type == MD_LINE_TABLEUNDERLINE) {
+        MD_ASSERT(ctx->current_block != NULL);
+        MD_ASSERT(ctx->current_block->n_lines == 1);
+        ctx->current_block->type = MD_BLOCK_TABLE;
+        ctx->current_block->data = line->data;
+        MD_ASSERT(pivot_line != &md_dummy_blank_line);
+        ((MD_LINE_ANALYSIS*)pivot_line)->type = MD_LINE_TABLE;
+        MD_CHECK(md_add_line_into_current_block(ctx, line));
+        return 0;
+    }
+
+    /* The current block also ends if the line has different type. */
+    if(line->type != pivot_line->type)
+        MD_CHECK(md_end_current_block(ctx));
+
+    /* The current line may start a new block. */
+    if(ctx->current_block == NULL) {
+        MD_CHECK(md_start_new_block(ctx, line));
+        *p_pivot_line = line;
+    }
+
+    /* In all other cases the line is just a continuation of the current block. */
+    MD_CHECK(md_add_line_into_current_block(ctx, line));
+
+abort:
+    return ret;
+}
+
+static int
+md_process_doc(MD_CTX *ctx)
+{
+    const MD_LINE_ANALYSIS* pivot_line = &md_dummy_blank_line;
+    MD_LINE_ANALYSIS line_buf[2];
+    MD_LINE_ANALYSIS* line = &line_buf[0];
+    OFF off = 0;
+    int ret = 0;
+
+    MD_ENTER_BLOCK(MD_BLOCK_DOC, NULL);
+
+    while(off < ctx->size) {
+        if(line == pivot_line)
+            line = (line == &line_buf[0] ? &line_buf[1] : &line_buf[0]);
+
+        MD_CHECK(md_analyze_line(ctx, off, &off, pivot_line, line));
+        MD_CHECK(md_process_line(ctx, &pivot_line, line));
+    }
+
+    md_end_current_block(ctx);
+
+    MD_CHECK(md_build_ref_def_hashtable(ctx));
+
+    /* Process all blocks. */
+    MD_CHECK(md_leave_child_containers(ctx, 0));
+    MD_CHECK(md_process_all_blocks(ctx));
+
+    MD_LEAVE_BLOCK(MD_BLOCK_DOC, NULL);
+
+abort:
+
+#if 0
+    /* Output some memory consumption statistics. */
+    {
+        char buffer[256];
+        sprintf(buffer, "Alloced %u bytes for block buffer.",
+                    (unsigned)(ctx->alloc_block_bytes));
+        MD_LOG(buffer);
+
+        sprintf(buffer, "Alloced %u bytes for containers buffer.",
+                    (unsigned)(ctx->alloc_containers * sizeof(MD_CONTAINER)));
+        MD_LOG(buffer);
+
+        sprintf(buffer, "Alloced %u bytes for marks buffer.",
+                    (unsigned)(ctx->alloc_marks * sizeof(MD_MARK)));
+        MD_LOG(buffer);
+
+        sprintf(buffer, "Alloced %u bytes for aux. buffer.",
+                    (unsigned)(ctx->alloc_buffer * sizeof(MD_CHAR)));
+        MD_LOG(buffer);
+    }
+#endif
+
+    return ret;
+}
+
+
+/********************
+ ***  Public API  ***
+ ********************/
+
+int
+md_parse(const MD_CHAR* text, MD_SIZE size, const MD_PARSER* parser, void* userdata)
+{
+    MD_CTX ctx;
+    int i;
+    int ret;
+
+    if(parser->abi_version != 0) {
+        if(parser->debug_log != NULL)
+            parser->debug_log("Unsupported abi_version.", userdata);
+        return -1;
+    }
+
+    /* Setup context structure. */
+    memset(&ctx, 0, sizeof(MD_CTX));
+    ctx.text = text;
+    ctx.size = size;
+    memcpy(&ctx.parser, parser, sizeof(MD_PARSER));
+    ctx.userdata = userdata;
+    ctx.code_indent_offset = (ctx.parser.flags & MD_FLAG_NOINDENTEDCODEBLOCKS) ? (OFF)(-1) : 4;
+    md_build_mark_char_map(&ctx);
+    ctx.doc_ends_with_newline = (size > 0  &&  ISNEWLINE_(text[size-1]));
+
+    /* Reset all unresolved opener mark chains. */
+    for(i = 0; i < (int) SIZEOF_ARRAY(ctx.mark_chains); i++) {
+        ctx.mark_chains[i].head = -1;
+        ctx.mark_chains[i].tail = -1;
+    }
+    ctx.unresolved_link_head = -1;
+    ctx.unresolved_link_tail = -1;
+
+    /* All the work. */
+    ret = md_process_doc(&ctx);
+
+    /* Clean-up. */
+    md_free_ref_defs(&ctx);
+    md_free_ref_def_hashtable(&ctx);
+    free(ctx.buffer);
+    free(ctx.marks);
+    free(ctx.block_bytes);
+    free(ctx.containers);
+
+    return ret;
+}
diff --git a/src/markdown/md4c.h b/src/markdown/md4c.h
new file mode 100644
index 0000000..95f78f9
--- /dev/null
+++ b/src/markdown/md4c.h
@@ -0,0 +1,405 @@
+/*
+ * MD4C: Markdown parser for C
+ * (http://github.com/mity/md4c)
+ *
+ * Copyright (c) 2016-2020 Martin Mitas
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef MD4C_H
+#define MD4C_H
+
+#ifdef __cplusplus
+    extern "C" {
+#endif
+
+#if defined MD4C_USE_UTF16
+    /* Magic to support UTF-16. Note that in order to use it, you have to define
+     * the macro MD4C_USE_UTF16 both when building MD4C as well as when
+     * including this header in your code. */
+    #ifdef _WIN32
+        #include 
+        typedef WCHAR       MD_CHAR;
+    #else
+        #error MD4C_USE_UTF16 is only supported on Windows.
+    #endif
+#else
+    typedef char            MD_CHAR;
+#endif
+
+typedef unsigned MD_SIZE;
+typedef unsigned MD_OFFSET;
+
+
+/* Block represents a part of document hierarchy structure like a paragraph
+ * or list item.
+ */
+typedef enum MD_BLOCKTYPE {
+    /* ... */
+    MD_BLOCK_DOC = 0,
+
+    /* 
        ...
         */
+    MD_BLOCK_QUOTE,
+
+    /* 
          ...
        
+     * Detail: Structure MD_BLOCK_UL_DETAIL. */
+    MD_BLOCK_UL,
+
+    /* 
          ...
        
+     * Detail: Structure MD_BLOCK_OL_DETAIL. */
+    MD_BLOCK_OL,
+
+    /* 
      • ...
        • 
+     * Detail: Structure MD_BLOCK_LI_DETAIL. */
+    MD_BLOCK_LI,
+
+    /* 
         */
+    MD_BLOCK_HR,
+
+    /* 
        ...
         (for levels up to 6)
+     * Detail: Structure MD_BLOCK_H_DETAIL. */
+    MD_BLOCK_H,
+
+    /* 
        ...
        
+     * Note the text lines within code blocks are terminated with '\n'
+     * instead of explicit MD_TEXT_BR. */
+    MD_BLOCK_CODE,
+
+    /* Raw HTML block. This itself does not correspond to any particular HTML
+     * tag. The contents of it _is_ raw HTML source intended to be put
+     * in verbatim form to the HTML output. */
+    MD_BLOCK_HTML,
+
+    /* 
        ...
         */
+    MD_BLOCK_P,
+
+    /* ...
         and its contents.
+     * Detail: Structure MD_BLOCK_TABLE_DETAIL (for MD_BLOCK_TABLE),
+     *         structure MD_BLOCK_TD_DETAIL (for MD_BLOCK_TH and MD_BLOCK_TD)
+     * Note all of these are used only if extension MD_FLAG_TABLES is enabled. */
+    MD_BLOCK_TABLE,
+    MD_BLOCK_THEAD,
+    MD_BLOCK_TBODY,
+    MD_BLOCK_TR,
+    MD_BLOCK_TH,
+    MD_BLOCK_TD
+} MD_BLOCKTYPE;
+
+/* Span represents an in-line piece of a document which should be rendered with
+ * the same font, color and other attributes. A sequence of spans forms a block
+ * like paragraph or list item. */
+typedef enum MD_SPANTYPE {
+    /* ... */
+    MD_SPAN_EM,
+
+    /* ... */
+    MD_SPAN_STRONG,
+
+    /* ...
+     * Detail: Structure MD_SPAN_A_DETAIL. */
+    MD_SPAN_A,
+
+    /* ...
+     * Detail: Structure MD_SPAN_IMG_DETAIL.
+     * Note: Image text can contain nested spans and even nested images.
+     * If rendered into ALT attribute of HTML  tag, it's responsibility
+     * of the parser to deal with it.
+     */
+    MD_SPAN_IMG,
+
+    /* ... */
+    MD_SPAN_CODE,
+
+    /* ...
+     * Note: Recognized only when MD_FLAG_STRIKETHROUGH is enabled.
+     */
+    MD_SPAN_DEL,
+
+    /* For recognizing inline ($) and display ($$) equations
+     * Note: Recognized only when MD_FLAG_LATEXMATHSPANS is enabled.
+     */
+    MD_SPAN_LATEXMATH,
+    MD_SPAN_LATEXMATH_DISPLAY,
+
+    /* Wiki links
+     * Note: Recognized only when MD_FLAG_WIKILINKS is enabled.
+     */
+    MD_SPAN_WIKILINK,
+
+    /* ...
+     * Note: Recognized only when MD_FLAG_UNDERLINE is enabled. */
+    MD_SPAN_U
+} MD_SPANTYPE;
+
+/* Text is the actual textual contents of span. */
+typedef enum MD_TEXTTYPE {
+    /* Normal text. */
+    MD_TEXT_NORMAL = 0,
+
+    /* NULL character. CommonMark requires replacing NULL character with
+     * the replacement char U+FFFD, so this allows caller to do that easily. */
+    MD_TEXT_NULLCHAR,
+
+    /* Line breaks.
+     * Note these are not sent from blocks with verbatim output (MD_BLOCK_CODE
+     * or MD_BLOCK_HTML). In such cases, '\n' is part of the text itself. */
+    MD_TEXT_BR,         /* 
         (hard break) */
+    MD_TEXT_SOFTBR,     /* '\n' in source text where it is not semantically meaningful (soft break) */
+
+    /* Entity.
+     * (a) Named entity, e.g.   
+     *     (Note MD4C does not have a list of known entities.
+     *     Anything matching the regexp /&[A-Za-z][A-Za-z0-9]{1,47};/ is
+     *     treated as a named entity.)
+     * (b) Numerical entity, e.g. Ӓ
+     * (c) Hexadecimal entity, e.g. ካ
+     *
+     * As MD4C is mostly encoding agnostic, application gets the verbatim
+     * entity text into the MD_PARSER::text_callback(). */
+    MD_TEXT_ENTITY,
+
+    /* Text in a code block (inside MD_BLOCK_CODE) or inlined code (`code`).
+     * If it is inside MD_BLOCK_CODE, it includes spaces for indentation and
+     * '\n' for new lines. MD_TEXT_BR and MD_TEXT_SOFTBR are not sent for this
+     * kind of text. */
+    MD_TEXT_CODE,
+
+    /* Text is a raw HTML. If it is contents of a raw HTML block (i.e. not
+     * an inline raw HTML), then MD_TEXT_BR and MD_TEXT_SOFTBR are not used.
+     * The text contains verbatim '\n' for the new lines. */
+    MD_TEXT_HTML,
+
+    /* Text is inside an equation. This is processed the same way as inlined code
+     * spans (`code`). */
+    MD_TEXT_LATEXMATH
+} MD_TEXTTYPE;
+
+
+/* Alignment enumeration. */
+typedef enum MD_ALIGN {
+    MD_ALIGN_DEFAULT = 0,   /* When unspecified. */
+    MD_ALIGN_LEFT,
+    MD_ALIGN_CENTER,
+    MD_ALIGN_RIGHT
+} MD_ALIGN;
+
+
+/* String attribute.
+ *
+ * This wraps strings which are outside of a normal text flow and which are
+ * propagated within various detailed structures, but which still may contain
+ * string portions of different types like e.g. entities.
+ *
+ * So, for example, lets consider this image:
+ *
+ *     ![image alt text](http://example.org/image.png 'foo " bar')
+ *
+ * The image alt text is propagated as a normal text via the MD_PARSER::text()
+ * callback. However, the image title ('foo " bar') is propagated as
+ * MD_ATTRIBUTE in MD_SPAN_IMG_DETAIL::title.
+ *
+ * Then the attribute MD_SPAN_IMG_DETAIL::title shall provide the following:
+ *  -- [0]: "foo "   (substr_types[0] == MD_TEXT_NORMAL; substr_offsets[0] == 0)
+ *  -- [1]: """ (substr_types[1] == MD_TEXT_ENTITY; substr_offsets[1] == 4)
+ *  -- [2]: " bar"   (substr_types[2] == MD_TEXT_NORMAL; substr_offsets[2] == 10)
+ *  -- [3]: (n/a)    (n/a                              ; substr_offsets[3] == 14)
+ *
+ * Note that these invariants are always guaranteed:
+ *  -- substr_offsets[0] == 0
+ *  -- substr_offsets[LAST+1] == size
+ *  -- Currently, only MD_TEXT_NORMAL, MD_TEXT_ENTITY, MD_TEXT_NULLCHAR
+ *     substrings can appear. This could change only of the specification
+ *     changes.
+ */
+typedef struct MD_ATTRIBUTE {
+    const MD_CHAR* text;
+    MD_SIZE size;
+    const MD_TEXTTYPE* substr_types;
+    const MD_OFFSET* substr_offsets;
+} MD_ATTRIBUTE;
+
+
+/* Detailed info for MD_BLOCK_UL. */
+typedef struct MD_BLOCK_UL_DETAIL {
+    int is_tight;           /* Non-zero if tight list, zero if loose. */
+    MD_CHAR mark;           /* Item bullet character in MarkDown source of the list, e.g. '-', '+', '*'. */
+} MD_BLOCK_UL_DETAIL;
+
+/* Detailed info for MD_BLOCK_OL. */
+typedef struct MD_BLOCK_OL_DETAIL {
+    unsigned start;         /* Start index of the ordered list. */
+    int is_tight;           /* Non-zero if tight list, zero if loose. */
+    MD_CHAR mark_delimiter; /* Character delimiting the item marks in MarkDown source, e.g. '.' or ')' */
+} MD_BLOCK_OL_DETAIL;
+
+/* Detailed info for MD_BLOCK_LI. */
+typedef struct MD_BLOCK_LI_DETAIL {
+    int is_task;            /* Can be non-zero only with MD_FLAG_TASKLISTS */
+    MD_CHAR task_mark;      /* If is_task, then one of 'x', 'X' or ' '. Undefined otherwise. */
+    MD_OFFSET task_mark_offset;  /* If is_task, then offset in the input of the char between '[' and ']'. */
+} MD_BLOCK_LI_DETAIL;
+
+/* Detailed info for MD_BLOCK_H. */
+typedef struct MD_BLOCK_H_DETAIL {
+    unsigned level;         /* Header level (1 - 6) */
+} MD_BLOCK_H_DETAIL;
+
+/* Detailed info for MD_BLOCK_CODE. */
+typedef struct MD_BLOCK_CODE_DETAIL {
+    MD_ATTRIBUTE info;
+    MD_ATTRIBUTE lang;
+    MD_CHAR fence_char;     /* The character used for fenced code block; or zero for indented code block. */
+} MD_BLOCK_CODE_DETAIL;
+
+/* Detailed info for MD_BLOCK_TABLE. */
+typedef struct MD_BLOCK_TABLE_DETAIL {
+    unsigned col_count;         /* Count of columns in the table. */
+    unsigned head_row_count;    /* Count of rows in the table header (currently always 1) */
+    unsigned body_row_count;    /* Count of rows in the table body */
+} MD_BLOCK_TABLE_DETAIL;
+
+/* Detailed info for MD_BLOCK_TH and MD_BLOCK_TD. */
+typedef struct MD_BLOCK_TD_DETAIL {
+    MD_ALIGN align;
+} MD_BLOCK_TD_DETAIL;
+
+/* Detailed info for MD_SPAN_A. */
+typedef struct MD_SPAN_A_DETAIL {
+    MD_ATTRIBUTE href;
+    MD_ATTRIBUTE title;
+} MD_SPAN_A_DETAIL;
+
+/* Detailed info for MD_SPAN_IMG. */
+typedef struct MD_SPAN_IMG_DETAIL {
+    MD_ATTRIBUTE src;
+    MD_ATTRIBUTE title;
+} MD_SPAN_IMG_DETAIL;
+
+/* Detailed info for MD_SPAN_WIKILINK. */
+typedef struct MD_SPAN_WIKILINK {
+    MD_ATTRIBUTE target;
+} MD_SPAN_WIKILINK_DETAIL;
+
+/* Flags specifying extensions/deviations from CommonMark specification.
+ *
+ * By default (when MD_PARSER::flags == 0), we follow CommonMark specification.
+ * The following flags may allow some extensions or deviations from it.
+ */
+#define MD_FLAG_COLLAPSEWHITESPACE          0x0001  /* In MD_TEXT_NORMAL, collapse non-trivial whitespace into single ' ' */
+#define MD_FLAG_PERMISSIVEATXHEADERS        0x0002  /* Do not require space in ATX headers ( ###header ) */
+#define MD_FLAG_PERMISSIVEURLAUTOLINKS      0x0004  /* Recognize URLs as autolinks even without '<', '>' */
+#define MD_FLAG_PERMISSIVEEMAILAUTOLINKS    0x0008  /* Recognize e-mails as autolinks even without '<', '>' and 'mailto:' */
+#define MD_FLAG_NOINDENTEDCODEBLOCKS        0x0010  /* Disable indented code blocks. (Only fenced code works.) */
+#define MD_FLAG_NOHTMLBLOCKS                0x0020  /* Disable raw HTML blocks. */
+#define MD_FLAG_NOHTMLSPANS                 0x0040  /* Disable raw HTML (inline). */
+#define MD_FLAG_TABLES                      0x0100  /* Enable tables extension. */
+#define MD_FLAG_STRIKETHROUGH               0x0200  /* Enable strikethrough extension. */
+#define MD_FLAG_PERMISSIVEWWWAUTOLINKS      0x0400  /* Enable WWW autolinks (even without any scheme prefix, if they begin with 'www.') */
+#define MD_FLAG_TASKLISTS                   0x0800  /* Enable task list extension. */
+#define MD_FLAG_LATEXMATHSPANS              0x1000  /* Enable $ and $$ containing LaTeX equations. */
+#define MD_FLAG_WIKILINKS                   0x2000  /* Enable wiki links extension. */
+#define MD_FLAG_UNDERLINE                   0x4000  /* Enable underline extension (and disables '_' for normal emphasis). */
+
+#define MD_FLAG_PERMISSIVEAUTOLINKS         (MD_FLAG_PERMISSIVEEMAILAUTOLINKS | MD_FLAG_PERMISSIVEURLAUTOLINKS | MD_FLAG_PERMISSIVEWWWAUTOLINKS)
+#define MD_FLAG_NOHTML                      (MD_FLAG_NOHTMLBLOCKS | MD_FLAG_NOHTMLSPANS)
+
+/* Convenient sets of flags corresponding to well-known Markdown dialects.
+ *
+ * Note we may only support subset of features of the referred dialect.
+ * The constant just enables those extensions which bring us as close as
+ * possible given what features we implement.
+ *
+ * ABI compatibility note: Meaning of these can change in time as new
+ * extensions, bringing the dialect closer to the original, are implemented.
+ */
+#define MD_DIALECT_COMMONMARK               0
+#define MD_DIALECT_GITHUB                   (MD_FLAG_PERMISSIVEAUTOLINKS | MD_FLAG_TABLES | MD_FLAG_STRIKETHROUGH | MD_FLAG_TASKLISTS)
+
+/* Parser structure.
+ */
+typedef struct MD_PARSER {
+    /* Reserved. Set to zero.
+     */
+    unsigned abi_version;
+
+    /* Dialect options. Bitmask of MD_FLAG_xxxx values.
+     */
+    unsigned flags;
+
+    /* Caller-provided rendering callbacks.
+     *
+     * For some block/span types, more detailed information is provided in a
+     * type-specific structure pointed by the argument 'detail'.
+     *
+     * The last argument of all callbacks, 'userdata', is just propagated from
+     * md_parse() and is available for any use by the application.
+     *
+     * Note any strings provided to the callbacks as their arguments or as
+     * members of any detail structure are generally not zero-terminated.
+     * Application has to take the respective size information into account.
+     *
+     * Any rendering callback may abort further parsing of the document by
+     * returning non-zero.
+     */
+    int (*enter_block)(MD_BLOCKTYPE /*type*/, void* /*detail*/, void* /*userdata*/);
+    int (*leave_block)(MD_BLOCKTYPE /*type*/, void* /*detail*/, void* /*userdata*/);
+
+    int (*enter_span)(MD_SPANTYPE /*type*/, void* /*detail*/, void* /*userdata*/);
+    int (*leave_span)(MD_SPANTYPE /*type*/, void* /*detail*/, void* /*userdata*/);
+
+    int (*text)(MD_TEXTTYPE /*type*/, const MD_CHAR* /*text*/, MD_SIZE /*size*/, void* /*userdata*/);
+
+    /* Debug callback. Optional (may be NULL).
+     *
+     * If provided and something goes wrong, this function gets called.
+     * This is intended for debugging and problem diagnosis for developers;
+     * it is not intended to provide any errors suitable for displaying to an
+     * end user.
+     */
+    void (*debug_log)(const char* /*msg*/, void* /*userdata*/);
+
+    /* Reserved. Set to NULL.
+     */
+    void (*syntax)(void);
+} MD_PARSER;
+
+
+/* For backward compatibility. Do not use in new code.
+ */
+typedef MD_PARSER MD_RENDERER;
+
+
+/* Parse the Markdown document stored in the string 'text' of size 'size'.
+ * The parser provides callbacks to be called during the parsing so the
+ * caller can render the document on the screen or convert the Markdown
+ * to another format.
+ *
+ * Zero is returned on success. If a runtime error occurs (e.g. a memory
+ * fails), -1 is returned. If the processing is aborted due any callback
+ * returning non-zero, the return value of the callback is returned.
+ */
+int md_parse(const MD_CHAR* text, MD_SIZE size, const MD_PARSER* parser, void* userdata);
+
+
+#ifdef __cplusplus
+    }  /* extern "C" { */
+#endif
+
+#endif  /* MD4C_H */
-- 
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