3 * Copyright 2004-2006 Aaron Voisine <aaron@voisine.org>
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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37 #define EZXML_BUFSIZE 1024 // size of internal memory buffers
38 #define EZXML_NAMEM 0x80 // name is malloced
39 #define EZXML_TXTM 0x40 // txt is malloced
40 #define EZXML_DUP 0x20 // attribute name and value are strduped
42 typedef struct ezxml *ezxml_t;
44 char *name; // tag name
45 char **attr; // tag attributes { name, value, name, value, ... NULL }
46 char *txt; // tag character content, empty string if none
47 size_t off; // tag offset from start of parent tag character content
48 ezxml_t next; // next tag with same name in this section at this depth
49 ezxml_t sibling; // next tag with different name in same section and depth
50 ezxml_t ordered; // next tag, same section and depth, in original order
51 ezxml_t child; // head of sub tag list, NULL if none
52 ezxml_t parent; // parent tag, NULL if current tag is root tag
53 short flags; // additional information
56 // Given a string of xml data and its length, parses it and creates an ezxml
57 // structure. For efficiency, modifies the data by adding null terminators
58 // and decoding ampersand sequences. If you don't want this, copy the data and
59 // pass in the copy. Returns NULL on failure.
60 ezxml_t ezxml_parse_str(char *s, size_t len);
62 // A wrapper for ezxml_parse_str() that accepts a file descriptor. First
63 // attempts to mem map the file. Failing that, reads the file into memory.
64 // Returns NULL on failure.
65 ezxml_t ezxml_parse_fd(int fd);
67 // a wrapper for ezxml_parse_fd() that accepts a file name
68 ezxml_t ezxml_parse_file(const char *file);
70 // Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire
71 // stream into memory and then parses it. For xml files, use ezxml_parse_file()
72 // or ezxml_parse_fd()
73 ezxml_t ezxml_parse_fp(FILE *fp);
75 // returns the first child tag (one level deeper) with the given name or NULL
77 ezxml_t ezxml_child(ezxml_t xml, const char *name);
79 // returns the next tag of the same name in the same section and depth or NULL
81 #define ezxml_next(xml) ((xml) ? xml->next : NULL)
83 // Returns the Nth tag with the same name in the same section at the same depth
84 // or NULL if not found. An index of 0 returns the tag given.
85 ezxml_t ezxml_idx(ezxml_t xml, int idx);
87 // returns the name of the given tag
88 #define ezxml_name(xml) ((xml) ? xml->name : NULL)
90 // returns the given tag's character content or empty string if none
91 #define ezxml_txt(xml) ((xml) ? xml->txt : "")
93 // returns the value of the requested tag attribute, or NULL if not found
94 const char *ezxml_attr(ezxml_t xml, const char *attr);
96 // Traverses the ezxml sturcture to retrieve a specific subtag. Takes a
97 // variable length list of tag names and indexes. The argument list must be
98 // terminated by either an index of -1 or an empty string tag name. Example:
99 // title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1);
100 // This retrieves the title of the 3rd book on the 1st shelf of library.
101 // Returns NULL if not found.
102 ezxml_t ezxml_get(ezxml_t xml, ...);
104 // Converts an ezxml structure back to xml. Returns a string of xml data that
106 char *ezxml_toxml(ezxml_t xml);
108 // returns a NULL terminated array of processing instructions for the given
110 const char **ezxml_pi(ezxml_t xml, const char *target);
112 // frees the memory allocated for an ezxml structure
113 void ezxml_free(ezxml_t xml);
115 // returns parser error message or empty string if none
116 const char *ezxml_error(ezxml_t xml);
118 // returns a new empty ezxml structure with the given root tag name
119 ezxml_t ezxml_new(const char *name);
121 // wrapper for ezxml_new() that strdup()s name
122 #define ezxml_new_d(name) ezxml_set_flag(ezxml_new(strdup(name)), EZXML_NAMEM)
124 // Adds a child tag. off is the offset of the child tag relative to the start
125 // of the parent tag's character content. Returns the child tag.
126 ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t off);
128 // wrapper for ezxml_add_child() that strdup()s name
129 #define ezxml_add_child_d(xml, name, off) \
130 ezxml_set_flag(ezxml_add_child(xml, strdup(name), off), EZXML_NAMEM)
132 // sets the character content for the given tag and returns the tag
133 ezxml_t ezxml_set_txt(ezxml_t xml, const char *txt);
135 // wrapper for ezxml_set_txt() that strdup()s txt
136 #define ezxml_set_txt_d(xml, txt) \
137 ezxml_set_flag(ezxml_set_txt(xml, strdup(txt)), EZXML_TXTM)
139 // Sets the given tag attribute or adds a new attribute if not found. A value
140 // of NULL will remove the specified attribute. Returns the tag given.
141 ezxml_t ezxml_set_attr(ezxml_t xml, const char *name, const char *value);
143 // Wrapper for ezxml_set_attr() that strdup()s name/value. Value cannot be NULL
144 #define ezxml_set_attr_d(xml, name, value) \
145 ezxml_set_attr(ezxml_set_flag(xml, EZXML_DUP), strdup(name), strdup(value))
147 // sets a flag for the given tag and returns the tag
148 ezxml_t ezxml_set_flag(ezxml_t xml, short flag);
150 // removes a tag along with its subtags without freeing its memory
151 ezxml_t ezxml_cut(ezxml_t xml);
153 // inserts an existing tag into an ezxml structure
154 ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t off);
156 // Moves an existing tag to become a subtag of dest at the given offset from
157 // the start of dest's character content. Returns the moved tag.
158 #define ezxml_move(xml, dest, off) ezxml_insert(ezxml_cut(xml), dest, off)
160 // removes a tag along with all its subtags
161 #define ezxml_remove(xml) ezxml_free(ezxml_cut(xml))