add assimp submodule

1 files changed, 241 insertions, 0 deletions

diff --git a/src/mesh/assimp-master/code/AssetLib/FBX/FBXUtil.cpp b/src/mesh/assimp-master/code/AssetLib/FBX/FBXUtil.cpp
new file mode 100644
index 0000000..ac465d6
--- /dev/null
+++ b/src/mesh/assimp-master/code/AssetLib/FBX/FBXUtil.cpp
@@ -0,0 +1,241 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXUtil.cpp
+ *  @brief Implementation of internal FBX utility functions
+ */
+
+#include "FBXUtil.h"
+#include "FBXTokenizer.h"
+
+#include <assimp/TinyFormatter.h>
+#include <string>
+#include <cstring>
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+namespace Assimp {
+namespace FBX {
+namespace Util {
+
+// ------------------------------------------------------------------------------------------------
+const char* TokenTypeString(TokenType t)
+{
+    switch(t) {
+        case TokenType_OPEN_BRACKET:
+            return "TOK_OPEN_BRACKET";
+
+        case TokenType_CLOSE_BRACKET:
+            return "TOK_CLOSE_BRACKET";
+
+        case TokenType_DATA:
+            return "TOK_DATA";
+
+        case TokenType_COMMA:
+            return "TOK_COMMA";
+
+        case TokenType_KEY:
+            return "TOK_KEY";
+
+        case TokenType_BINARY_DATA:
+            return "TOK_BINARY_DATA";
+    }
+
+    ai_assert(false);
+    return "";
+}
+
+
+// ------------------------------------------------------------------------------------------------
+std::string GetOffsetText(size_t offset)
+{
+    return static_cast<std::string>( Formatter::format() << " (offset 0x" << std::hex << offset << ") " );
+}
+
+// ------------------------------------------------------------------------------------------------
+std::string GetLineAndColumnText(unsigned int line, unsigned int column)
+{
+    return static_cast<std::string>( Formatter::format() << " (line " << line << " <<  col " << column << ") " );
+}
+
+// ------------------------------------------------------------------------------------------------
+std::string GetTokenText(const Token* tok)
+{
+    if(tok->IsBinary()) {
+        return static_cast<std::string>( Formatter::format() <<
+            " (" << TokenTypeString(tok->Type()) <<
+            ", offset 0x" << std::hex << tok->Offset() << ") " );
+    }
+
+    return static_cast<std::string>( Formatter::format() <<
+        " (" << TokenTypeString(tok->Type()) <<
+        ", line " << tok->Line() <<
+        ", col " << tok->Column() << ") " );
+}
+
+// Generated by this formula: T["ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[i]] = i;
+static const uint8_t base64DecodeTable[128] = {
+    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63,
+    52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 255, 255, 255,
+    255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
+    15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255,
+    255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+    41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 255, 255, 255, 255, 255
+};
+
+uint8_t DecodeBase64(char ch)
+{
+    const auto idx = static_cast<uint8_t>(ch);
+    if (idx > 127)
+        return 255;
+    return base64DecodeTable[idx];
+}
+
+size_t ComputeDecodedSizeBase64(const char* in, size_t inLength)
+{
+    if (inLength < 2)
+    {
+        return 0;
+    }
+    const size_t equals = size_t(in[inLength - 1] == '=') + size_t(in[inLength - 2] == '=');
+    const size_t full_length = (inLength * 3) >> 2; // div by 4
+    if (full_length < equals)
+    {
+        return 0;
+    }
+    return full_length - equals;
+}
+
+size_t DecodeBase64(const char* in, size_t inLength, uint8_t* out, size_t maxOutLength)
+{
+    if (maxOutLength == 0 || inLength < 2) {
+        return 0;
+    }
+    const size_t realLength = inLength - size_t(in[inLength - 1] == '=') - size_t(in[inLength - 2] == '=');
+    size_t dst_offset = 0;
+    int val = 0, valb = -8;
+    for (size_t src_offset = 0; src_offset < realLength; ++src_offset)
+    {
+        const uint8_t table_value = Util::DecodeBase64(in[src_offset]);
+        if (table_value == 255)
+        {
+            return 0;
+        }
+        val = (val << 6) + table_value;
+        valb += 6;
+        if (valb >= 0)
+        {
+            out[dst_offset++] = static_cast<uint8_t>((val >> valb) & 0xFF);
+            valb -= 8;
+            val &= 0xFFF;
+        }
+    }
+    return dst_offset;
+}
+
+static const char to_base64_string[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+char EncodeBase64(char byte)
+{
+    return to_base64_string[(size_t)byte];
+}
+
+/** Encodes a block of 4 bytes to base64 encoding
+*
+*  @param bytes Bytes to encode.
+*  @param out_string String to write encoded values to.
+*  @param string_pos Position in out_string.*/
+void EncodeByteBlock(const char* bytes, std::string& out_string, size_t string_pos)
+{
+    char b0 = (bytes[0] & 0xFC) >> 2;
+    char b1 = (bytes[0] & 0x03) << 4 | ((bytes[1] & 0xF0) >> 4);
+    char b2 = (bytes[1] & 0x0F) << 2 | ((bytes[2] & 0xC0) >> 6);
+    char b3 = (bytes[2] & 0x3F);
+
+    out_string[string_pos + 0] = EncodeBase64(b0);
+    out_string[string_pos + 1] = EncodeBase64(b1);
+    out_string[string_pos + 2] = EncodeBase64(b2);
+    out_string[string_pos + 3] = EncodeBase64(b3);
+}
+
+std::string EncodeBase64(const char* data, size_t length)
+{
+    // calculate extra bytes needed to get a multiple of 3
+    size_t extraBytes = 3 - length % 3;
+
+    // number of base64 bytes
+    size_t encodedBytes = 4 * (length + extraBytes) / 3;
+
+    std::string encoded_string(encodedBytes, '=');
+
+    // read blocks of 3 bytes
+    for (size_t ib3 = 0; ib3 < length / 3; ib3++)
+    {
+        const size_t iByte = ib3 * 3;
+        const size_t iEncodedByte = ib3 * 4;
+        const char* currData = &data[iByte];
+
+        EncodeByteBlock(currData, encoded_string, iEncodedByte);
+    }
+
+    // if size of data is not a multiple of 3, also encode the final bytes (and add zeros where needed)
+    if (extraBytes > 0)
+    {
+        char finalBytes[4] = { 0,0,0,0 };
+        memcpy(&finalBytes[0], &data[length - length % 3], length % 3);
+
+        const size_t iEncodedByte = encodedBytes - 4;
+        EncodeByteBlock(&finalBytes[0], encoded_string, iEncodedByte);
+
+        // add '=' at the end
+        for (size_t i = 0; i < 4 * extraBytes / 3; i++)
+            encoded_string[encodedBytes - i - 1] = '=';
+    }
+    return encoded_string;
+}
+
+} // !Util
+} // !FBX
+} // !Assimp
+
+#endif