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
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/* ezxml.h
*
* Copyright 2004-2006 Aaron Voisine <aaron@voisine.org>
*
* 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 _EZXML_H
#define _EZXML_H
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <fcntl.h>
#ifdef __cplusplus
extern "C" {
#endif
#define EZXML_BUFSIZE 1024 // size of internal memory buffers
#define EZXML_NAMEM 0x80 // name is malloced
#define EZXML_TXTM 0x40 // txt is malloced
#define EZXML_DUP 0x20 // attribute name and value are strduped
typedef struct ezxml *ezxml_t;
struct ezxml {
char *name; // tag name
char **attr; // tag attributes { name, value, name, value, ... NULL }
char *txt; // tag character content, empty string if none
size_t off; // tag offset from start of parent tag character content
ezxml_t next; // next tag with same name in this section at this depth
ezxml_t sibling; // next tag with different name in same section and depth
ezxml_t ordered; // next tag, same section and depth, in original order
ezxml_t child; // head of sub tag list, NULL if none
ezxml_t parent; // parent tag, NULL if current tag is root tag
short flags; // additional information
};
// Given a string of xml data and its length, parses it and creates an ezxml
// structure. For efficiency, modifies the data by adding null terminators
// and decoding ampersand sequences. If you don't want this, copy the data and
// pass in the copy. Returns NULL on failure.
ezxml_t ezxml_parse_str(char *s, size_t len);
// A wrapper for ezxml_parse_str() that accepts a file descriptor. First
// attempts to mem map the file. Failing that, reads the file into memory.
// Returns NULL on failure.
ezxml_t ezxml_parse_fd(int fd);
// a wrapper for ezxml_parse_fd() that accepts a file name
ezxml_t ezxml_parse_file(const char *file);
// Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire
// stream into memory and then parses it. For xml files, use ezxml_parse_file()
// or ezxml_parse_fd()
ezxml_t ezxml_parse_fp(FILE *fp);
// returns the first child tag (one level deeper) with the given name or NULL
// if not found
ezxml_t ezxml_child(ezxml_t xml, const char *name);
// returns the next tag of the same name in the same section and depth or NULL
// if not found
#define ezxml_next(xml) ((xml) ? xml->next : NULL)
// Returns the Nth tag with the same name in the same section at the same depth
// or NULL if not found. An index of 0 returns the tag given.
ezxml_t ezxml_idx(ezxml_t xml, int idx);
// returns the name of the given tag
#define ezxml_name(xml) ((xml) ? xml->name : NULL)
// returns the given tag's character content or empty string if none
#define ezxml_txt(xml) ((xml) ? xml->txt : "")
// returns the value of the requested tag attribute, or NULL if not found
const char *ezxml_attr(ezxml_t xml, const char *attr);
// Traverses the ezxml sturcture to retrieve a specific subtag. Takes a
// variable length list of tag names and indexes. The argument list must be
// terminated by either an index of -1 or an empty string tag name. Example:
// title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1);
// This retrieves the title of the 3rd book on the 1st shelf of library.
// Returns NULL if not found.
ezxml_t ezxml_get(ezxml_t xml, ...);
// Converts an ezxml structure back to xml. Returns a string of xml data that
// must be freed.
char *ezxml_toxml(ezxml_t xml);
// returns a NULL terminated array of processing instructions for the given
// target
const char **ezxml_pi(ezxml_t xml, const char *target);
// frees the memory allocated for an ezxml structure
void ezxml_free(ezxml_t xml);
// returns parser error message or empty string if none
const char *ezxml_error(ezxml_t xml);
// returns a new empty ezxml structure with the given root tag name
ezxml_t ezxml_new(const char *name);
// wrapper for ezxml_new() that strdup()s name
#define ezxml_new_d(name) ezxml_set_flag(ezxml_new(strdup(name)), EZXML_NAMEM)
// Adds a child tag. off is the offset of the child tag relative to the start
// of the parent tag's character content. Returns the child tag.
ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t off);
// wrapper for ezxml_add_child() that strdup()s name
#define ezxml_add_child_d(xml, name, off) \
ezxml_set_flag(ezxml_add_child(xml, strdup(name), off), EZXML_NAMEM)
// sets the character content for the given tag and returns the tag
ezxml_t ezxml_set_txt(ezxml_t xml, const char *txt);
// wrapper for ezxml_set_txt() that strdup()s txt
#define ezxml_set_txt_d(xml, txt) \
ezxml_set_flag(ezxml_set_txt(xml, strdup(txt)), EZXML_TXTM)
// Sets the given tag attribute or adds a new attribute if not found. A value
// of NULL will remove the specified attribute. Returns the tag given.
ezxml_t ezxml_set_attr(ezxml_t xml, const char *name, const char *value);
// Wrapper for ezxml_set_attr() that strdup()s name/value. Value cannot be NULL
#define ezxml_set_attr_d(xml, name, value) \
ezxml_set_attr(ezxml_set_flag(xml, EZXML_DUP), strdup(name), strdup(value))
// sets a flag for the given tag and returns the tag
ezxml_t ezxml_set_flag(ezxml_t xml, short flag);
// removes a tag along with its subtags without freeing its memory
ezxml_t ezxml_cut(ezxml_t xml);
// inserts an existing tag into an ezxml structure
ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t off);
// Moves an existing tag to become a subtag of dest at the given offset from
// the start of dest's character content. Returns the moved tag.
#define ezxml_move(xml, dest, off) ezxml_insert(ezxml_cut(xml), dest, off)
// removes a tag along with all its subtags
#define ezxml_remove(xml) ezxml_free(ezxml_cut(xml))
#ifdef __cplusplus
}
#endif
#endif // _EZXML_H
|
