1 | /* ezxml.c |
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2 | * |
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3 | * Copyright 2004-2006 Aaron Voisine <aaron@voisine.org> |
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4 | * |
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5 | * Permission is hereby granted, free of charge, to any person obtaining |
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6 | * a copy of this software and associated documentation files (the |
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7 | * "Software"), to deal in the Software without restriction, including |
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8 | * without limitation the rights to use, copy, modify, merge, publish, |
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9 | * distribute, sublicense, and/or sell copies of the Software, and to |
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10 | * permit persons to whom the Software is furnished to do so, subject to |
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11 | * the following conditions: |
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12 | * |
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13 | * The above copyright notice and this permission notice shall be included |
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14 | * in all copies or substantial portions of the Software. |
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15 | * |
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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17 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
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19 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
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20 | * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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21 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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22 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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23 | */ |
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24 | |
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25 | #include <stdlib.h> |
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26 | #include <stdio.h> |
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27 | #include <stdarg.h> |
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28 | #include <string.h> |
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29 | #include <ctype.h> |
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30 | #include <unistd.h> |
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31 | #include <sys/types.h> |
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32 | #ifndef EZXML_NOMMAP |
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33 | #include <sys/mman.h> |
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34 | #endif // EZXML_NOMMAP |
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35 | #include <sys/stat.h> |
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36 | #include "ezxml.h" |
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37 | |
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38 | #define EZXML_WS "\t\r\n " // whitespace |
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39 | #define EZXML_ERRL 128 // maximum error string length |
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40 | |
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41 | typedef struct ezxml_root *ezxml_root_t; |
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42 | struct ezxml_root { // additional data for the root tag |
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43 | struct ezxml xml; // is a super-struct built on top of ezxml struct |
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44 | ezxml_t cur; // current xml tree insertion point |
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45 | char *m; // original xml string |
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46 | size_t len; // length of allocated memory for mmap, -1 for malloc |
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47 | char *u; // UTF-8 conversion of string if original was UTF-16 |
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48 | char *s; // start of work area |
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49 | char *e; // end of work area |
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50 | char **ent; // general entities (ampersand sequences) |
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51 | char ***attr; // default attributes |
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52 | char ***pi; // processing instructions |
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53 | short standalone; // non-zero if <?xml standalone="yes"?> |
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54 | char err[EZXML_ERRL]; // error string |
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55 | }; |
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56 | |
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57 | char *EZXML_NIL[] = { NULL }; // empty, null terminated array of strings |
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58 | |
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59 | // returns the first child tag with the given name or NULL if not found |
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60 | ezxml_t ezxml_child(ezxml_t xml, const char *name) |
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61 | { |
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62 | xml = (xml) ? xml->child : NULL; |
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63 | while (xml && strcmp(name, xml->name)) xml = xml->sibling; |
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64 | return xml; |
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65 | } |
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66 | |
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67 | // returns the Nth tag with the same name in the same subsection or NULL if not |
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68 | // found |
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69 | ezxml_t ezxml_idx(ezxml_t xml, int idx) |
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70 | { |
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71 | for (; xml && idx; idx--) xml = xml->next; |
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72 | return xml; |
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73 | } |
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74 | |
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75 | // returns the value of the requested tag attribute or NULL if not found |
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76 | const char *ezxml_attr(ezxml_t xml, const char *attr) |
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77 | { |
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78 | int i = 0, j = 1; |
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79 | ezxml_root_t root = (ezxml_root_t)xml; |
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80 | |
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81 | if (! xml || ! xml->attr) return NULL; |
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82 | while (xml->attr[i] && strcmp(attr, xml->attr[i])) i += 2; |
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83 | if (xml->attr[i]) return xml->attr[i + 1]; // found attribute |
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84 | |
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85 | while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag |
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86 | for (i = 0; root->attr[i] && strcmp(xml->name, root->attr[i][0]); i++); |
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87 | if (! root->attr[i]) return NULL; // no matching default attributes |
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88 | while (root->attr[i][j] && strcmp(attr, root->attr[i][j])) j += 3; |
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89 | return (root->attr[i][j]) ? root->attr[i][j + 1] : NULL; // found default |
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90 | } |
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91 | |
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92 | // same as ezxml_get but takes an already initialized va_list |
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93 | ezxml_t ezxml_vget(ezxml_t xml, va_list ap) |
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94 | { |
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95 | char *name = va_arg(ap, char *); |
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96 | int idx = -1; |
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97 | |
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98 | if (name && *name) { |
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99 | idx = va_arg(ap, int); |
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100 | xml = ezxml_child(xml, name); |
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101 | } |
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102 | return (idx < 0) ? xml : ezxml_vget(ezxml_idx(xml, idx), ap); |
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103 | } |
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104 | |
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105 | // Traverses the xml tree to retrieve a specific subtag. Takes a variable |
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106 | // length list of tag names and indexes. The argument list must be terminated |
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107 | // by either an index of -1 or an empty string tag name. Example: |
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108 | // title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1); |
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109 | // This retrieves the title of the 3rd book on the 1st shelf of library. |
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110 | // Returns NULL if not found. |
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111 | ezxml_t ezxml_get(ezxml_t xml, ...) |
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112 | { |
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113 | va_list ap; |
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114 | ezxml_t r; |
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115 | |
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116 | va_start(ap, xml); |
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117 | r = ezxml_vget(xml, ap); |
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118 | va_end(ap); |
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119 | return r; |
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120 | } |
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121 | |
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122 | // returns a null terminated array of processing instructions for the given |
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123 | // target |
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124 | const char **ezxml_pi(ezxml_t xml, const char *target) |
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125 | { |
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126 | ezxml_root_t root = (ezxml_root_t)xml; |
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127 | int i = 0; |
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128 | |
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129 | if (! root) return (const char **)EZXML_NIL; |
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130 | while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag |
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131 | while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; // find target |
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132 | return (const char **)((root->pi[i]) ? root->pi[i] + 1 : EZXML_NIL); |
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133 | } |
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134 | |
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135 | // set an error string and return root |
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136 | ezxml_t ezxml_err(ezxml_root_t root, char *s, const char *err, ...) |
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137 | { |
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138 | va_list ap; |
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139 | int line = 1; |
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140 | char *t, fmt[EZXML_ERRL]; |
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141 | |
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142 | for (t = root->s; t < s; t++) if (*t == '\n') line++; |
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143 | snprintf(fmt, EZXML_ERRL, "[error near line %d]: %s", line, err); |
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144 | |
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145 | va_start(ap, err); |
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146 | vsnprintf(root->err, EZXML_ERRL, fmt, ap); |
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147 | va_end(ap); |
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148 | |
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149 | return &root->xml; |
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150 | } |
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151 | |
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152 | // Recursively decodes entity and character references and normalizes new lines |
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153 | // ent is a null terminated array of alternating entity names and values. set t |
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154 | // to '&' for general entity decoding, '%' for parameter entity decoding, 'c' |
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155 | // for cdata sections, ' ' for attribute normalization, or '*' for non-cdata |
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156 | // attribute normalization. Returns s, or if the decoded string is longer than |
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157 | // s, returns a malloced string that must be freed. |
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158 | char *ezxml_decode(char *s, char **ent, char t) |
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159 | { |
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160 | char *e, *r = s, *m = s; |
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161 | long b, c, d, l; |
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162 | |
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163 | for (; *s; s++) { // normalize line endings |
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164 | while (*s == '\r') { |
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165 | *(s++) = '\n'; |
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166 | if (*s == '\n') memmove(s, (s + 1), strlen(s)); |
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167 | } |
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168 | } |
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169 | |
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170 | for (s = r; ; ) { |
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171 | while (*s && *s != '&' && (*s != '%' || t != '%') && !isspace(*s)) s++; |
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172 | |
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173 | if (! *s) break; |
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174 | else if (t != 'c' && ! strncmp(s, "&#", 2)) { // character reference |
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175 | if (s[2] == 'x') c = strtol(s + 3, &e, 16); // base 16 |
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176 | else c = strtol(s + 2, &e, 10); // base 10 |
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177 | if (! c || *e != ';') { s++; continue; } // not a character ref |
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178 | |
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179 | if (c < 0x80) *(s++) = c; // US-ASCII subset |
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180 | else { // multi-byte UTF-8 sequence |
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181 | for (b = 0, d = c; d; d /= 2) b++; // number of bits in c |
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182 | b = (b - 2) / 5; // number of bytes in payload |
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183 | *(s++) = (0xFF << (7 - b)) | (c >> (6 * b)); // head |
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184 | while (b) *(s++) = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload |
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185 | } |
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186 | |
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187 | memmove(s, strchr(s, ';') + 1, strlen(strchr(s, ';'))); |
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188 | } |
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189 | else if ((*s == '&' && (t == '&' || t == ' ' || t == '*')) || |
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190 | (*s == '%' && t == '%')) { // entity reference |
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191 | for (b = 0; ent[b] && strncmp(s + 1, ent[b], strlen(ent[b])); |
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192 | b += 2); // find entity in entity list |
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193 | |
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194 | if (ent[b++]) { // found a match |
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195 | if ((c = strlen(ent[b])) - 1 > (e = strchr(s, ';')) - s) { |
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196 | l = (d = (s - r)) + c + strlen(e); // new length |
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197 | r = (r == m) ? strcpy(malloc(l), r) : realloc(r, l); |
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198 | e = strchr((s = r + d), ';'); // fix up pointers |
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199 | } |
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200 | |
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201 | memmove(s + c, e + 1, strlen(e)); // shift rest of string |
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202 | strncpy(s, ent[b], c); // copy in replacement text |
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203 | } |
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204 | else s++; // not a known entity |
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205 | } |
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206 | else if ((t == ' ' || t == '*') && isspace(*s)) *(s++) = ' '; |
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207 | else s++; // no decoding needed |
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208 | } |
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209 | |
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210 | if (t == '*') { // normalize spaces for non-cdata attributes |
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211 | for (s = r; *s; s++) { |
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212 | if ((l = strspn(s, " "))) memmove(s, s + l, strlen(s + l) + 1); |
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213 | while (*s && *s != ' ') s++; |
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214 | } |
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215 | if (--s >= r && *s == ' ') *s = '\0'; // trim any trailing space |
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216 | } |
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217 | return r; |
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218 | } |
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219 | |
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220 | // called when parser finds start of new tag |
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221 | void ezxml_open_tag(ezxml_root_t root, char *name, char **attr) |
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222 | { |
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223 | ezxml_t xml = root->cur; |
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224 | |
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225 | if (xml->name) xml = ezxml_add_child(xml, name, strlen(xml->txt)); |
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226 | else xml->name = name; // first open tag |
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227 | |
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228 | xml->attr = attr; |
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229 | root->cur = xml; // update tag insertion point |
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230 | } |
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231 | |
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232 | // called when parser finds character content between open and closing tag |
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233 | void ezxml_char_content(ezxml_root_t root, char *s, size_t len, char t) |
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234 | { |
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235 | ezxml_t xml = root->cur; |
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236 | char *m = s; |
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237 | size_t l; |
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238 | |
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239 | if (! xml || ! xml->name || ! len) return; // sanity check |
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240 | |
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241 | s[len] = '\0'; // null terminate text (calling functions anticipate this) |
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242 | len = strlen(s = ezxml_decode(s, root->ent, t)) + 1; |
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243 | |
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244 | if (! *(xml->txt)) xml->txt = s; // initial character content |
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245 | else { // allocate our own memory and make a copy |
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246 | xml->txt = (xml->flags & EZXML_TXTM) // allocate some space |
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247 | ? realloc(xml->txt, (l = strlen(xml->txt)) + len) |
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248 | : strcpy(malloc((l = strlen(xml->txt)) + len), xml->txt); |
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249 | strcpy(xml->txt + l, s); // add new char content |
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250 | if (s != m) free(s); // free s if it was malloced by ezxml_decode() |
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251 | } |
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252 | |
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253 | if (xml->txt != m) ezxml_set_flag(xml, EZXML_TXTM); |
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254 | } |
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255 | |
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256 | // called when parser finds closing tag |
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257 | ezxml_t ezxml_close_tag(ezxml_root_t root, char *name, char *s) |
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258 | { |
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259 | if (! root->cur || ! root->cur->name || strcmp(name, root->cur->name)) |
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260 | return ezxml_err(root, s, "unexpected closing tag </%s>", name); |
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261 | |
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262 | root->cur = root->cur->parent; |
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263 | return NULL; |
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264 | } |
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265 | |
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266 | // checks for circular entity references, returns non-zero if no circular |
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267 | // references are found, zero otherwise |
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268 | int ezxml_ent_ok(char *name, char *s, char **ent) |
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269 | { |
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270 | int i; |
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271 | |
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272 | for (; ; s++) { |
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273 | while (*s && *s != '&') s++; // find next entity reference |
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274 | if (! *s) return 1; |
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275 | if (! strncmp(s + 1, name, strlen(name))) return 0; // circular ref. |
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276 | for (i = 0; ent[i] && strncmp(ent[i], s + 1, strlen(ent[i])); i += 2); |
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277 | if (ent[i] && ! ezxml_ent_ok(name, ent[i + 1], ent)) return 0; |
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278 | } |
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279 | } |
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280 | |
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281 | // called when the parser finds a processing instruction |
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282 | void ezxml_proc_inst(ezxml_root_t root, char *s, size_t len) |
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283 | { |
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284 | int i = 0, j = 1; |
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285 | char *target = s; |
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286 | |
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287 | s[len] = '\0'; // null terminate instruction |
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288 | if (*(s += strcspn(s, EZXML_WS))) { |
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289 | *s = '\0'; // null terminate target |
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290 | s += strspn(s + 1, EZXML_WS) + 1; // skip whitespace after target |
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291 | } |
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292 | |
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293 | if (! strcmp(target, "xml")) { // <?xml ... ?> |
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294 | if ((s = strstr(s, "standalone")) && ! strncmp(s + strspn(s + 10, |
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295 | EZXML_WS "='\"") + 10, "yes", 3)) root->standalone = 1; |
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296 | return; |
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297 | } |
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298 | |
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299 | if (! root->pi[0]) *(root->pi = malloc(sizeof(char **))) = NULL; //first pi |
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300 | |
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301 | while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; // find target |
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302 | if (! root->pi[i]) { // new target |
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303 | root->pi = realloc(root->pi, sizeof(char **) * (i + 2)); |
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304 | root->pi[i] = malloc(sizeof(char *) * 3); |
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305 | root->pi[i][0] = target; |
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306 | root->pi[i][1] = (char *)(root->pi[i + 1] = NULL); // terminate pi list |
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307 | root->pi[i][2] = strdup(""); // empty document position list |
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308 | } |
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309 | |
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310 | while (root->pi[i][j]) j++; // find end of instruction list for this target |
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311 | root->pi[i] = realloc(root->pi[i], sizeof(char *) * (j + 3)); |
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312 | root->pi[i][j + 2] = realloc(root->pi[i][j + 1], j + 1); |
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313 | strcpy(root->pi[i][j + 2] + j - 1, (root->xml.name) ? ">" : "<"); |
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314 | root->pi[i][j + 1] = NULL; // null terminate pi list for this target |
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315 | root->pi[i][j] = s; // set instruction |
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316 | } |
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317 | |
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318 | // called when the parser finds an internal doctype subset |
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319 | short ezxml_internal_dtd(ezxml_root_t root, char *s, size_t len) |
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320 | { |
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321 | char q, *c, *t, *n = NULL, *v, **ent, **pe; |
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322 | int i, j; |
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323 | |
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324 | pe = memcpy(malloc(sizeof(EZXML_NIL)), EZXML_NIL, sizeof(EZXML_NIL)); |
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325 | |
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326 | for (s[len] = '\0'; s; ) { |
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327 | while (*s && *s != '<' && *s != '%') s++; // find next declaration |
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328 | |
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329 | if (! *s) break; |
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330 | else if (! strncmp(s, "<!ENTITY", 8)) { // parse entity definitions |
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331 | c = s += strspn(s + 8, EZXML_WS) + 8; // skip white space separator |
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332 | n = s + strspn(s, EZXML_WS "%"); // find name |
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333 | *(s = n + strcspn(n, EZXML_WS)) = ';'; // append ; to name |
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334 | |
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335 | v = s + strspn(s + 1, EZXML_WS) + 1; // find value |
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336 | if ((q = *(v++)) != '"' && q != '\'') { // skip externals |
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337 | s = strchr(s, '>'); |
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338 | continue; |
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339 | } |
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340 | |
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341 | for (i = 0, ent = (*c == '%') ? pe : root->ent; ent[i]; i++); |
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342 | ent = realloc(ent, (i + 3) * sizeof(char *)); // space for next ent |
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343 | if (*c == '%') pe = ent; |
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344 | else root->ent = ent; |
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345 | |
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346 | *(++s) = '\0'; // null terminate name |
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347 | if ((s = strchr(v, q))) *(s++) = '\0'; // null terminate value |
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348 | ent[i + 1] = ezxml_decode(v, pe, '%'); // set value |
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349 | ent[i + 2] = NULL; // null terminate entity list |
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350 | if (! ezxml_ent_ok(n, ent[i + 1], ent)) { // circular reference |
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351 | if (ent[i + 1] != v) free(ent[i + 1]); |
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352 | ezxml_err(root, v, "circular entity declaration &%s", n); |
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353 | break; |
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354 | } |
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355 | else ent[i] = n; // set entity name |
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356 | } |
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357 | else if (! strncmp(s, "<!ATTLIST", 9)) { // parse default attributes |
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358 | t = s + strspn(s + 9, EZXML_WS) + 9; // skip whitespace separator |
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359 | if (! *t) { ezxml_err(root, t, "unclosed <!ATTLIST"); break; } |
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360 | if (*(s = t + strcspn(t, EZXML_WS ">")) == '>') continue; |
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361 | else *s = '\0'; // null terminate tag name |
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362 | for (i = 0; root->attr[i] && strcmp(n, root->attr[i][0]); i++); |
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363 | |
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364 | while (*(n = ++s + strspn(s, EZXML_WS)) && *n != '>') { |
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365 | if (*(s = n + strcspn(n, EZXML_WS))) *s = '\0'; // attr name |
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366 | else { ezxml_err(root, t, "malformed <!ATTLIST"); break; } |
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367 | |
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368 | s += strspn(s + 1, EZXML_WS) + 1; // find next token |
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369 | c = (strncmp(s, "CDATA", 5)) ? "*" : " "; // is it cdata? |
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370 | if (! strncmp(s, "NOTATION", 8)) |
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371 | s += strspn(s + 8, EZXML_WS) + 8; |
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372 | s = (*s == '(') ? strchr(s, ')') : s + strcspn(s, EZXML_WS); |
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373 | if (! s) { ezxml_err(root, t, "malformed <!ATTLIST"); break; } |
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374 | |
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375 | s += strspn(s, EZXML_WS ")"); // skip white space separator |
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376 | if (! strncmp(s, "#FIXED", 6)) |
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377 | s += strspn(s + 6, EZXML_WS) + 6; |
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378 | if (*s == '#') { // no default value |
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379 | s += strcspn(s, EZXML_WS ">") - 1; |
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380 | if (*c == ' ') continue; // cdata is default, nothing to do |
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381 | v = NULL; |
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382 | } |
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383 | else if ((*s == '"' || *s == '\'') && // default value |
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384 | (s = strchr(v = s + 1, *s))) *s = '\0'; |
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385 | else { ezxml_err(root, t, "malformed <!ATTLIST"); break; } |
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386 | |
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387 | if (! root->attr[i]) { // new tag name |
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388 | root->attr = (! i) ? malloc(2 * sizeof(char **)) |
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389 | : realloc(root->attr, |
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390 | (i + 2) * sizeof(char **)); |
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391 | root->attr[i] = malloc(2 * sizeof(char *)); |
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392 | root->attr[i][0] = t; // set tag name |
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393 | root->attr[i][1] = (char *)(root->attr[i + 1] = NULL); |
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394 | } |
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395 | |
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396 | for (j = 1; root->attr[i][j]; j += 3); // find end of list |
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397 | root->attr[i] = realloc(root->attr[i], |
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398 | (j + 4) * sizeof(char *)); |
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399 | |
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400 | root->attr[i][j + 3] = NULL; // null terminate list |
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401 | root->attr[i][j + 2] = c; // is it cdata? |
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402 | root->attr[i][j + 1] = (v) ? ezxml_decode(v, root->ent, *c) |
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403 | : NULL; |
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404 | root->attr[i][j] = n; // attribute name |
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405 | } |
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406 | } |
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407 | else if (! strncmp(s, "<!--", 4)) s = strstr(s + 4, "-->"); // comments |
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408 | else if (! strncmp(s, "<?", 2)) { // processing instructions |
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409 | if ((s = strstr(c = s + 2, "?>"))) |
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410 | ezxml_proc_inst(root, c, s++ - c); |
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411 | } |
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412 | else if (*s == '<') s = strchr(s, '>'); // skip other declarations |
---|
413 | else if (*(s++) == '%' && ! root->standalone) break; |
---|
414 | } |
---|
415 | |
---|
416 | free(pe); |
---|
417 | return ! *root->err; |
---|
418 | } |
---|
419 | |
---|
420 | // Converts a UTF-16 string to UTF-8. Returns a new string that must be freed |
---|
421 | // or NULL if no conversion was needed. |
---|
422 | char *ezxml_str2utf8(char **s, size_t *len) |
---|
423 | { |
---|
424 | char *u; |
---|
425 | size_t l = 0, sl, max = *len; |
---|
426 | long c, d; |
---|
427 | int b, be = (**s == '\xFE') ? 1 : (**s == '\xFF') ? 0 : -1; |
---|
428 | |
---|
429 | if (be == -1) return NULL; // not UTF-16 |
---|
430 | |
---|
431 | u = malloc(max); |
---|
432 | for (sl = 2; sl < *len - 1; sl += 2) { |
---|
433 | c = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) //UTF-16BE |
---|
434 | : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); //UTF-16LE |
---|
435 | if (c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1) { // high-half |
---|
436 | d = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) |
---|
437 | : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); |
---|
438 | c = (((c & 0x3FF) << 10) | (d & 0x3FF)) + 0x10000; |
---|
439 | } |
---|
440 | |
---|
441 | while (l + 6 > max) u = realloc(u, max += EZXML_BUFSIZE); |
---|
442 | if (c < 0x80) u[l++] = c; // US-ASCII subset |
---|
443 | else { // multi-byte UTF-8 sequence |
---|
444 | for (b = 0, d = c; d; d /= 2) b++; // bits in c |
---|
445 | b = (b - 2) / 5; // bytes in payload |
---|
446 | u[l++] = (0xFF << (7 - b)) | (c >> (6 * b)); // head |
---|
447 | while (b) u[l++] = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload |
---|
448 | } |
---|
449 | } |
---|
450 | return *s = realloc(u, *len = l); |
---|
451 | } |
---|
452 | |
---|
453 | // frees a tag attribute list |
---|
454 | void ezxml_free_attr(char **attr) { |
---|
455 | int i = 0; |
---|
456 | char *m; |
---|
457 | |
---|
458 | if (! attr || attr == EZXML_NIL) return; // nothing to free |
---|
459 | while (attr[i]) i += 2; // find end of attribute list |
---|
460 | m = attr[i + 1]; // list of which names and values are malloced |
---|
461 | for (i = 0; m[i]; i++) { |
---|
462 | if (m[i] & EZXML_NAMEM) free(attr[i * 2]); |
---|
463 | if (m[i] & EZXML_TXTM) free(attr[(i * 2) + 1]); |
---|
464 | } |
---|
465 | free(m); |
---|
466 | free(attr); |
---|
467 | } |
---|
468 | |
---|
469 | // parse the given xml string and return an ezxml structure |
---|
470 | ezxml_t ezxml_parse_str(char *s, size_t len) |
---|
471 | { |
---|
472 | ezxml_root_t root = (ezxml_root_t)ezxml_new(NULL); |
---|
473 | char q, e, *d, **attr, **a = NULL; // initialize a to avoid compile warning |
---|
474 | int l, i, j; |
---|
475 | |
---|
476 | root->m = s; |
---|
477 | if (! len) return ezxml_err(root, NULL, "root tag missing"); |
---|
478 | root->u = ezxml_str2utf8(&s, &len); // convert utf-16 to utf-8 |
---|
479 | root->e = (root->s = s) + len; // record start and end of work area |
---|
480 | |
---|
481 | e = s[len - 1]; // save end char |
---|
482 | s[len - 1] = '\0'; // turn end char into null terminator |
---|
483 | |
---|
484 | while (*s && *s != '<') s++; // find first tag |
---|
485 | if (! *s) return ezxml_err(root, s, "root tag missing"); |
---|
486 | |
---|
487 | for (; ; ) { |
---|
488 | attr = (char **)EZXML_NIL; |
---|
489 | d = ++s; |
---|
490 | |
---|
491 | if (isalpha(*s) || *s == '_' || *s == ':' || *s < '\0') { // new tag |
---|
492 | if (! root->cur) |
---|
493 | return ezxml_err(root, d, "markup outside of root element"); |
---|
494 | |
---|
495 | s += strcspn(s, EZXML_WS "/>"); |
---|
496 | while (isspace(*s)) *(s++) = '\0'; // null terminate tag name |
---|
497 | |
---|
498 | if (*s && *s != '/' && *s != '>') // find tag in default attr list |
---|
499 | for (i = 0; (a = root->attr[i]) && strcmp(a[0], d); i++); |
---|
500 | |
---|
501 | for (l = 0; *s && *s != '/' && *s != '>'; l += 2) { // new attrib |
---|
502 | attr = (l) ? realloc(attr, (l + 4) * sizeof(char *)) |
---|
503 | : malloc(4 * sizeof(char *)); // allocate space |
---|
504 | attr[l + 3] = (l) ? realloc(attr[l + 1], (l / 2) + 2) |
---|
505 | : malloc(2); // mem for list of maloced vals |
---|
506 | strcpy(attr[l + 3] + (l / 2), " "); // value is not malloced |
---|
507 | attr[l + 2] = NULL; // null terminate list |
---|
508 | attr[l + 1] = ""; // temporary attribute value |
---|
509 | attr[l] = s; // set attribute name |
---|
510 | |
---|
511 | s += strcspn(s, EZXML_WS "=/>"); |
---|
512 | if (*s == '=' || isspace(*s)) { |
---|
513 | *(s++) = '\0'; // null terminate tag attribute name |
---|
514 | q = *(s += strspn(s, EZXML_WS "=")); |
---|
515 | if (q == '"' || q == '\'') { // attribute value |
---|
516 | attr[l + 1] = ++s; |
---|
517 | while (*s && *s != q) s++; |
---|
518 | if (*s) *(s++) = '\0'; // null terminate attribute val |
---|
519 | else { |
---|
520 | ezxml_free_attr(attr); |
---|
521 | return ezxml_err(root, d, "missing %c", q); |
---|
522 | } |
---|
523 | |
---|
524 | for (j = 1; a && a[j] && strcmp(a[j], attr[l]); j +=3); |
---|
525 | attr[l + 1] = ezxml_decode(attr[l + 1], root->ent, (a |
---|
526 | && a[j]) ? *a[j + 2] : ' '); |
---|
527 | if (attr[l + 1] < d || attr[l + 1] > s) |
---|
528 | attr[l + 3][l / 2] = EZXML_TXTM; // value malloced |
---|
529 | } |
---|
530 | } |
---|
531 | while (isspace(*s)) s++; |
---|
532 | } |
---|
533 | |
---|
534 | if (*s == '/') { // self closing tag |
---|
535 | *(s++) = '\0'; |
---|
536 | if ((*s && *s != '>') || (! *s && e != '>')) { |
---|
537 | if (l) ezxml_free_attr(attr); |
---|
538 | return ezxml_err(root, d, "missing >"); |
---|
539 | } |
---|
540 | ezxml_open_tag(root, d, attr); |
---|
541 | ezxml_close_tag(root, d, s); |
---|
542 | } |
---|
543 | else if ((q = *s) == '>' || (! *s && e == '>')) { // open tag |
---|
544 | *s = '\0'; // temporarily null terminate tag name |
---|
545 | ezxml_open_tag(root, d, attr); |
---|
546 | *s = q; |
---|
547 | } |
---|
548 | else { |
---|
549 | if (l) ezxml_free_attr(attr); |
---|
550 | return ezxml_err(root, d, "missing >"); |
---|
551 | } |
---|
552 | } |
---|
553 | else if (*s == '/') { // close tag |
---|
554 | s += strcspn(d = s + 1, EZXML_WS ">") + 1; |
---|
555 | if (! (q = *s) && e != '>') return ezxml_err(root, d, "missing >"); |
---|
556 | *s = '\0'; // temporarily null terminate tag name |
---|
557 | if (ezxml_close_tag(root, d, s)) return &root->xml; |
---|
558 | if (isspace(*s = q)) s += strspn(s, EZXML_WS); |
---|
559 | } |
---|
560 | else if (! strncmp(s, "!--", 3)) { // xml comment |
---|
561 | if (! (s = strstr(s + 3, "--")) || (*(s += 2) != '>' && *s) || |
---|
562 | (! *s && e != '>')) return ezxml_err(root, d, "unclosed <!--"); |
---|
563 | } |
---|
564 | else if (! strncmp(s, "![CDATA[", 8)) { // cdata |
---|
565 | if ((s = strstr(s, "]]>"))) |
---|
566 | ezxml_char_content(root, d + 8, (s += 2) - d - 10, 'c'); |
---|
567 | else return ezxml_err(root, d, "unclosed <![CDATA["); |
---|
568 | } |
---|
569 | else if (! strncmp(s, "!DOCTYPE", 8)) { // dtd |
---|
570 | for (l = 0; *s && ((! l && *s != '>') || (l && (*s != ']' || |
---|
571 | *(s + strspn(s + 1, EZXML_WS) + 1) != '>'))); |
---|
572 | l = (*s == '[') ? 1 : l) s += strcspn(s + 1, "[]>") + 1; |
---|
573 | if (! *s && e != '>') |
---|
574 | return ezxml_err(root, d, "unclosed <!DOCTYPE"); |
---|
575 | d = (l) ? strchr(d, '[') + 1 : d; |
---|
576 | if (l && ! ezxml_internal_dtd(root, d, s++ - d)) return &root->xml; |
---|
577 | } |
---|
578 | else if (*s == '?') { // <?...?> processing instructions |
---|
579 | do { s = strchr(s, '?'); } while (s && *(++s) && *s != '>'); |
---|
580 | if (! s || (! *s && e != '>')) |
---|
581 | return ezxml_err(root, d, "unclosed <?"); |
---|
582 | else ezxml_proc_inst(root, d + 1, s - d - 2); |
---|
583 | } |
---|
584 | else return ezxml_err(root, d, "unexpected <"); |
---|
585 | |
---|
586 | if (! s || ! *s) break; |
---|
587 | *s = '\0'; |
---|
588 | d = ++s; |
---|
589 | if (*s && *s != '<') { // tag character content |
---|
590 | while (*s && *s != '<') s++; |
---|
591 | if (*s) ezxml_char_content(root, d, s - d, '&'); |
---|
592 | else break; |
---|
593 | } |
---|
594 | else if (! *s) break; |
---|
595 | } |
---|
596 | |
---|
597 | if (! root->cur) return &root->xml; |
---|
598 | else if (! root->cur->name) return ezxml_err(root, d, "root tag missing"); |
---|
599 | else return ezxml_err(root, d, "unclosed tag <%s>", root->cur->name); |
---|
600 | } |
---|
601 | |
---|
602 | // Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire |
---|
603 | // stream into memory and then parses it. For xml files, use ezxml_parse_file() |
---|
604 | // or ezxml_parse_fd() |
---|
605 | ezxml_t ezxml_parse_fp(FILE *fp) |
---|
606 | { |
---|
607 | ezxml_root_t root; |
---|
608 | size_t l, len = 0; |
---|
609 | char *s; |
---|
610 | |
---|
611 | if (! (s = malloc(EZXML_BUFSIZE))) return NULL; |
---|
612 | do { |
---|
613 | len += (l = fread((s + len), 1, EZXML_BUFSIZE, fp)); |
---|
614 | if (l == EZXML_BUFSIZE) s = realloc(s, len + EZXML_BUFSIZE); |
---|
615 | } while (s && l == EZXML_BUFSIZE); |
---|
616 | |
---|
617 | if (! s) return NULL; |
---|
618 | root = (ezxml_root_t)ezxml_parse_str(s, len); |
---|
619 | root->len = -1; // so we know to free s in ezxml_free() |
---|
620 | return &root->xml; |
---|
621 | } |
---|
622 | |
---|
623 | // A wrapper for ezxml_parse_str() that accepts a file descriptor. First |
---|
624 | // attempts to mem map the file. Failing that, reads the file into memory. |
---|
625 | // Returns NULL on failure. |
---|
626 | ezxml_t ezxml_parse_fd(int fd) |
---|
627 | { |
---|
628 | ezxml_root_t root; |
---|
629 | struct stat st; |
---|
630 | size_t l; |
---|
631 | void *m; |
---|
632 | |
---|
633 | if (fd < 0) return NULL; |
---|
634 | fstat(fd, &st); |
---|
635 | |
---|
636 | #ifndef EZXML_NOMMAP |
---|
637 | l = (st.st_size + sysconf(_SC_PAGESIZE) - 1) & ~(sysconf(_SC_PAGESIZE) -1); |
---|
638 | if ((m = mmap(NULL, l, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0)) != |
---|
639 | MAP_FAILED) { |
---|
640 | madvise(m, l, MADV_SEQUENTIAL); // optimize for sequential access |
---|
641 | root = (ezxml_root_t)ezxml_parse_str(m, st.st_size); |
---|
642 | madvise(m, root->len = l, MADV_NORMAL); // put it back to normal |
---|
643 | } |
---|
644 | else { // mmap failed, read file into memory |
---|
645 | #endif // EZXML_NOMMAP |
---|
646 | l = read(fd, m = malloc(st.st_size), st.st_size); |
---|
647 | root = (ezxml_root_t)ezxml_parse_str(m, l); |
---|
648 | root->len = -1; // so we know to free s in ezxml_free() |
---|
649 | #ifndef EZXML_NOMMAP |
---|
650 | } |
---|
651 | #endif // EZXML_NOMMAP |
---|
652 | return &root->xml; |
---|
653 | } |
---|
654 | |
---|
655 | // a wrapper for ezxml_parse_fd that accepts a file name |
---|
656 | ezxml_t ezxml_parse_file(const char *file) |
---|
657 | { |
---|
658 | int fd = open(file, O_RDONLY, 0); |
---|
659 | ezxml_t xml = ezxml_parse_fd(fd); |
---|
660 | |
---|
661 | if (fd >= 0) close(fd); |
---|
662 | return xml; |
---|
663 | } |
---|
664 | |
---|
665 | // Encodes ampersand sequences appending the results to *dst, reallocating *dst |
---|
666 | // if length excedes max. a is non-zero for attribute encoding. Returns *dst |
---|
667 | char *ezxml_ampencode(const char *s, size_t len, char **dst, size_t *dlen, |
---|
668 | size_t *max, short a) |
---|
669 | { |
---|
670 | const char *e; |
---|
671 | |
---|
672 | for (e = s + len; s != e; s++) { |
---|
673 | while (*dlen + 10 > *max) *dst = realloc(*dst, *max += EZXML_BUFSIZE); |
---|
674 | |
---|
675 | switch (*s) { |
---|
676 | case '\0': return *dst; |
---|
677 | case '&': *dlen += sprintf(*dst + *dlen, "&"); break; |
---|
678 | case '<': *dlen += sprintf(*dst + *dlen, "<"); break; |
---|
679 | case '>': *dlen += sprintf(*dst + *dlen, ">"); break; |
---|
680 | case '"': *dlen += sprintf(*dst + *dlen, (a) ? """ : "\""); break; |
---|
681 | case '\n': *dlen += sprintf(*dst + *dlen, (a) ? "
" : "\n"); break; |
---|
682 | case '\t': *dlen += sprintf(*dst + *dlen, (a) ? "	" : "\t"); break; |
---|
683 | case '\r': *dlen += sprintf(*dst + *dlen, "
"); break; |
---|
684 | default: (*dst)[(*dlen)++] = *s; |
---|
685 | } |
---|
686 | } |
---|
687 | return *dst; |
---|
688 | } |
---|
689 | |
---|
690 | // Recursively converts each tag to xml appending it to *s. Reallocates *s if |
---|
691 | // its length excedes max. start is the location of the previous tag in the |
---|
692 | // parent tag's character content. Returns *s. |
---|
693 | char *ezxml_toxml_r(ezxml_t xml, char **s, size_t *len, size_t *max, |
---|
694 | size_t start, char ***attr) |
---|
695 | { |
---|
696 | int i, j; |
---|
697 | char *txt = (xml->parent) ? xml->parent->txt : ""; |
---|
698 | size_t off = 0; |
---|
699 | |
---|
700 | // parent character content up to this tag |
---|
701 | *s = ezxml_ampencode(txt + start, xml->off - start, s, len, max, 0); |
---|
702 | |
---|
703 | while (*len + strlen(xml->name) + 4 > *max) // reallocate s |
---|
704 | *s = realloc(*s, *max += EZXML_BUFSIZE); |
---|
705 | |
---|
706 | *len += sprintf(*s + *len, "<%s", xml->name); // open tag |
---|
707 | for (i = 0; xml->attr[i]; i += 2) { // tag attributes |
---|
708 | if (ezxml_attr(xml, xml->attr[i]) != xml->attr[i + 1]) continue; |
---|
709 | while (*len + strlen(xml->attr[i]) + 7 > *max) // reallocate s |
---|
710 | *s = realloc(*s, *max += EZXML_BUFSIZE); |
---|
711 | |
---|
712 | *len += sprintf(*s + *len, " %s=\"", xml->attr[i]); |
---|
713 | ezxml_ampencode(xml->attr[i + 1], -1, s, len, max, 1); |
---|
714 | *len += sprintf(*s + *len, "\""); |
---|
715 | } |
---|
716 | |
---|
717 | for (i = 0; attr[i] && strcmp(attr[i][0], xml->name); i++); |
---|
718 | for (j = 1; attr[i] && attr[i][j]; j += 3) { // default attributes |
---|
719 | if (! attr[i][j + 1] || ezxml_attr(xml, attr[i][j]) != attr[i][j + 1]) |
---|
720 | continue; // skip duplicates and non-values |
---|
721 | while (*len + strlen(attr[i][j]) + 7 > *max) // reallocate s |
---|
722 | *s = realloc(*s, *max += EZXML_BUFSIZE); |
---|
723 | |
---|
724 | *len += sprintf(*s + *len, " %s=\"", attr[i][j]); |
---|
725 | ezxml_ampencode(attr[i][j + 1], -1, s, len, max, 1); |
---|
726 | *len += sprintf(*s + *len, "\""); |
---|
727 | } |
---|
728 | *len += sprintf(*s + *len, ">"); |
---|
729 | |
---|
730 | *s = (xml->child) ? ezxml_toxml_r(xml->child, s, len, max, 0, attr) //child |
---|
731 | : ezxml_ampencode(xml->txt, -1, s, len, max, 0); //data |
---|
732 | |
---|
733 | while (*len + strlen(xml->name) + 4 > *max) // reallocate s |
---|
734 | *s = realloc(*s, *max += EZXML_BUFSIZE); |
---|
735 | |
---|
736 | *len += sprintf(*s + *len, "</%s>", xml->name); // close tag |
---|
737 | |
---|
738 | while (txt[off] && off < xml->off) off++; // make sure off is within bounds |
---|
739 | return (xml->ordered) ? ezxml_toxml_r(xml->ordered, s, len, max, off, attr) |
---|
740 | : ezxml_ampencode(txt + off, -1, s, len, max, 0); |
---|
741 | } |
---|
742 | |
---|
743 | // Converts an ezxml structure back to xml. Returns a string of xml data that |
---|
744 | // must be freed. |
---|
745 | char *ezxml_toxml(ezxml_t xml) |
---|
746 | { |
---|
747 | ezxml_t p = (xml) ? xml->parent : NULL, o = (xml) ? xml->ordered : NULL; |
---|
748 | ezxml_root_t root = (ezxml_root_t)xml; |
---|
749 | size_t len = 0, max = EZXML_BUFSIZE; |
---|
750 | char *s = strcpy(malloc(max), ""), *t, *n; |
---|
751 | int i, j, k; |
---|
752 | |
---|
753 | if (! xml || ! xml->name) return realloc(s, len + 1); |
---|
754 | while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag |
---|
755 | |
---|
756 | for (i = 0; ! p && root->pi[i]; i++) { // pre-root processing instructions |
---|
757 | for (k = 2; root->pi[i][k - 1]; k++); |
---|
758 | for (j = 1; (n = root->pi[i][j]); j++) { |
---|
759 | if (root->pi[i][k][j - 1] == '>') continue; // not pre-root |
---|
760 | while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max) |
---|
761 | s = realloc(s, max += EZXML_BUFSIZE); |
---|
762 | len += sprintf(s + len, "<?%s%s%s?>\n", t, *n ? " " : "", n); |
---|
763 | } |
---|
764 | } |
---|
765 | |
---|
766 | xml->parent = xml->ordered = NULL; |
---|
767 | s = ezxml_toxml_r(xml, &s, &len, &max, 0, root->attr); |
---|
768 | xml->parent = p; |
---|
769 | xml->ordered = o; |
---|
770 | |
---|
771 | for (i = 0; ! p && root->pi[i]; i++) { // post-root processing instructions |
---|
772 | for (k = 2; root->pi[i][k - 1]; k++); |
---|
773 | for (j = 1; (n = root->pi[i][j]); j++) { |
---|
774 | if (root->pi[i][k][j - 1] == '<') continue; // not post-root |
---|
775 | while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max) |
---|
776 | s = realloc(s, max += EZXML_BUFSIZE); |
---|
777 | len += sprintf(s + len, "\n<?%s%s%s?>", t, *n ? " " : "", n); |
---|
778 | } |
---|
779 | } |
---|
780 | return realloc(s, len + 1); |
---|
781 | } |
---|
782 | |
---|
783 | // free the memory allocated for the ezxml structure |
---|
784 | void ezxml_free(ezxml_t xml) |
---|
785 | { |
---|
786 | ezxml_root_t root = (ezxml_root_t)xml; |
---|
787 | int i, j; |
---|
788 | char **a, *s; |
---|
789 | |
---|
790 | if (! xml) return; |
---|
791 | ezxml_free(xml->child); |
---|
792 | ezxml_free(xml->ordered); |
---|
793 | |
---|
794 | if (! xml->parent) { // free root tag allocations |
---|
795 | for (i = 10; root->ent[i]; i += 2) // 0 - 9 are default entites (<>&"') |
---|
796 | if ((s = root->ent[i + 1]) < root->s || s > root->e) free(s); |
---|
797 | free(root->ent); // free list of general entities |
---|
798 | |
---|
799 | for (i = 0; (a = root->attr[i]); i++) { |
---|
800 | for (j = 1; a[j++]; j += 2) // free malloced attribute values |
---|
801 | if (a[j] && (a[j] < root->s || a[j] > root->e)) free(a[j]); |
---|
802 | free(a); |
---|
803 | } |
---|
804 | if (root->attr[0]) free(root->attr); // free default attribute list |
---|
805 | |
---|
806 | for (i = 0; root->pi[i]; i++) { |
---|
807 | for (j = 1; root->pi[i][j]; j++); |
---|
808 | free(root->pi[i][j + 1]); |
---|
809 | free(root->pi[i]); |
---|
810 | } |
---|
811 | if (root->pi[0]) free(root->pi); // free processing instructions |
---|
812 | |
---|
813 | if (root->len == -1) free(root->m); // malloced xml data |
---|
814 | #ifndef EZXML_NOMMAP |
---|
815 | else if (root->len) munmap(root->m, root->len); // mem mapped xml data |
---|
816 | #endif // EZXML_NOMMAP |
---|
817 | if (root->u) free(root->u); // utf8 conversion |
---|
818 | } |
---|
819 | |
---|
820 | ezxml_free_attr(xml->attr); // tag attributes |
---|
821 | if ((xml->flags & EZXML_TXTM)) free(xml->txt); // character content |
---|
822 | if ((xml->flags & EZXML_NAMEM)) free(xml->name); // tag name |
---|
823 | free(xml); |
---|
824 | } |
---|
825 | |
---|
826 | // return parser error message or empty string if none |
---|
827 | const char *ezxml_error(ezxml_t xml) |
---|
828 | { |
---|
829 | while (xml && xml->parent) xml = xml->parent; // find root tag |
---|
830 | return (xml) ? ((ezxml_root_t)xml)->err : ""; |
---|
831 | } |
---|
832 | |
---|
833 | // returns a new empty ezxml structure with the given root tag name |
---|
834 | ezxml_t ezxml_new(const char *name) |
---|
835 | { |
---|
836 | static char *ent[] = { "lt;", "<", "gt;", ">", "quot;", """, |
---|
837 | "apos;", "'", "amp;", "&", NULL }; |
---|
838 | ezxml_root_t root = (ezxml_root_t)memset(malloc(sizeof(struct ezxml_root)), |
---|
839 | '\0', sizeof(struct ezxml_root)); |
---|
840 | root->xml.name = (char *)name; |
---|
841 | root->cur = &root->xml; |
---|
842 | strcpy(root->err, root->xml.txt = ""); |
---|
843 | root->ent = memcpy(malloc(sizeof(ent)), ent, sizeof(ent)); |
---|
844 | root->attr = root->pi = (char ***)(root->xml.attr = EZXML_NIL); |
---|
845 | return &root->xml; |
---|
846 | } |
---|
847 | |
---|
848 | // inserts an existing tag into an ezxml structure |
---|
849 | ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t off) |
---|
850 | { |
---|
851 | ezxml_t cur, prev, head; |
---|
852 | |
---|
853 | xml->next = xml->sibling = xml->ordered = NULL; |
---|
854 | xml->off = off; |
---|
855 | xml->parent = dest; |
---|
856 | |
---|
857 | if ((head = dest->child)) { // already have sub tags |
---|
858 | if (head->off <= off) { // not first subtag |
---|
859 | for (cur = head; cur->ordered && cur->ordered->off <= off; |
---|
860 | cur = cur->ordered); |
---|
861 | xml->ordered = cur->ordered; |
---|
862 | cur->ordered = xml; |
---|
863 | } |
---|
864 | else { // first subtag |
---|
865 | xml->ordered = head; |
---|
866 | dest->child = xml; |
---|
867 | } |
---|
868 | |
---|
869 | for (cur = head, prev = NULL; cur && strcmp(cur->name, xml->name); |
---|
870 | prev = cur, cur = cur->sibling); // find tag type |
---|
871 | if (cur && cur->off <= off) { // not first of type |
---|
872 | while (cur->next && cur->next->off <= off) cur = cur->next; |
---|
873 | xml->next = cur->next; |
---|
874 | cur->next = xml; |
---|
875 | } |
---|
876 | else { // first tag of this type |
---|
877 | if (prev && cur) prev->sibling = cur->sibling; // remove old first |
---|
878 | xml->next = cur; // old first tag is now next |
---|
879 | for (cur = head, prev = NULL; cur && cur->off <= off; |
---|
880 | prev = cur, cur = cur->sibling); // new sibling insert point |
---|
881 | xml->sibling = cur; |
---|
882 | if (prev) prev->sibling = xml; |
---|
883 | } |
---|
884 | } |
---|
885 | else dest->child = xml; // only sub tag |
---|
886 | |
---|
887 | return xml; |
---|
888 | } |
---|
889 | |
---|
890 | // Adds a child tag. off is the offset of the child tag relative to the start |
---|
891 | // of the parent tag's character content. Returns the child tag. |
---|
892 | ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t off) |
---|
893 | { |
---|
894 | ezxml_t child; |
---|
895 | |
---|
896 | if (! xml) return NULL; |
---|
897 | child = (ezxml_t)memset(malloc(sizeof(struct ezxml)), '\0', |
---|
898 | sizeof(struct ezxml)); |
---|
899 | child->name = (char *)name; |
---|
900 | child->attr = EZXML_NIL; |
---|
901 | child->txt = ""; |
---|
902 | |
---|
903 | return ezxml_insert(child, xml, off); |
---|
904 | } |
---|
905 | |
---|
906 | // sets the character content for the given tag and returns the tag |
---|
907 | ezxml_t ezxml_set_txt(ezxml_t xml, const char *txt) |
---|
908 | { |
---|
909 | if (! xml) return NULL; |
---|
910 | if (xml->flags & EZXML_TXTM) free(xml->txt); // existing txt was malloced |
---|
911 | xml->flags &= ~EZXML_TXTM; |
---|
912 | xml->txt = (char *)txt; |
---|
913 | return xml; |
---|
914 | } |
---|
915 | |
---|
916 | // Sets the given tag attribute or adds a new attribute if not found. A value |
---|
917 | // of NULL will remove the specified attribute. Returns the tag given. |
---|
918 | ezxml_t ezxml_set_attr(ezxml_t xml, const char *name, const char *value) |
---|
919 | { |
---|
920 | int l = 0, c; |
---|
921 | |
---|
922 | if (! xml) return NULL; |
---|
923 | while (xml->attr[l] && strcmp(xml->attr[l], name)) l += 2; |
---|
924 | if (! xml->attr[l]) { // not found, add as new attribute |
---|
925 | if (! value) return xml; // nothing to do |
---|
926 | if (xml->attr == EZXML_NIL) { // first attribute |
---|
927 | xml->attr = malloc(4 * sizeof(char *)); |
---|
928 | xml->attr[1] = strdup(""); // empty list of malloced names/vals |
---|
929 | } |
---|
930 | else xml->attr = realloc(xml->attr, (l + 4) * sizeof(char *)); |
---|
931 | |
---|
932 | xml->attr[l] = (char *)name; // set attribute name |
---|
933 | xml->attr[l + 2] = NULL; // null terminate attribute list |
---|
934 | xml->attr[l + 3] = realloc(xml->attr[l + 1], |
---|
935 | (c = strlen(xml->attr[l + 1])) + 2); |
---|
936 | strcpy(xml->attr[l + 3] + c, " "); // set name/value as not malloced |
---|
937 | if (xml->flags & EZXML_DUP) xml->attr[l + 3][c] = EZXML_NAMEM; |
---|
938 | } |
---|
939 | else if (xml->flags & EZXML_DUP) free((char *)name); // name was strduped |
---|
940 | |
---|
941 | for (c = l; xml->attr[c]; c += 2); // find end of attribute list |
---|
942 | if (xml->attr[c + 1][l / 2] & EZXML_TXTM) free(xml->attr[l + 1]); //old val |
---|
943 | if (xml->flags & EZXML_DUP) xml->attr[c + 1][l / 2] |= EZXML_TXTM; |
---|
944 | else xml->attr[c + 1][l / 2] &= ~EZXML_TXTM; |
---|
945 | |
---|
946 | if (value) xml->attr[l + 1] = (char *)value; // set attribute value |
---|
947 | else { // remove attribute |
---|
948 | if (xml->attr[c + 1][l / 2] & EZXML_NAMEM) free(xml->attr[l]); |
---|
949 | memmove(xml->attr + l, xml->attr + l + 2, (c - l + 2) * sizeof(char*)); |
---|
950 | xml->attr = realloc(xml->attr, (c + 2) * sizeof(char *)); |
---|
951 | memmove(xml->attr[c + 1] + (l / 2), xml->attr[c + 1] + (l / 2) + 1, |
---|
952 | (c / 2) - (l / 2)); // fix list of which name/vals are malloced |
---|
953 | } |
---|
954 | xml->flags &= ~EZXML_DUP; // clear strdup() flag |
---|
955 | return xml; |
---|
956 | } |
---|
957 | |
---|
958 | // sets a flag for the given tag and returns the tag |
---|
959 | ezxml_t ezxml_set_flag(ezxml_t xml, short flag) |
---|
960 | { |
---|
961 | if (xml) xml->flags |= flag; |
---|
962 | return xml; |
---|
963 | } |
---|
964 | |
---|
965 | // removes a tag along with its subtags without freeing its memory |
---|
966 | ezxml_t ezxml_cut(ezxml_t xml) |
---|
967 | { |
---|
968 | ezxml_t cur; |
---|
969 | |
---|
970 | if (! xml) return NULL; // nothing to do |
---|
971 | if (xml->next) xml->next->sibling = xml->sibling; // patch sibling list |
---|
972 | |
---|
973 | if (xml->parent) { // not root tag |
---|
974 | cur = xml->parent->child; // find head of subtag list |
---|
975 | if (cur == xml) xml->parent->child = xml->ordered; // first subtag |
---|
976 | else { // not first subtag |
---|
977 | while (cur->ordered != xml) cur = cur->ordered; |
---|
978 | cur->ordered = cur->ordered->ordered; // patch ordered list |
---|
979 | |
---|
980 | cur = xml->parent->child; // go back to head of subtag list |
---|
981 | if (strcmp(cur->name, xml->name)) { // not in first sibling list |
---|
982 | while (strcmp(cur->sibling->name, xml->name)) |
---|
983 | cur = cur->sibling; |
---|
984 | if (cur->sibling == xml) { // first of a sibling list |
---|
985 | cur->sibling = (xml->next) ? xml->next |
---|
986 | : cur->sibling->sibling; |
---|
987 | } |
---|
988 | else cur = cur->sibling; // not first of a sibling list |
---|
989 | } |
---|
990 | |
---|
991 | while (cur->next && cur->next != xml) cur = cur->next; |
---|
992 | if (cur->next) cur->next = cur->next->next; // patch next list |
---|
993 | } |
---|
994 | } |
---|
995 | xml->ordered = xml->sibling = xml->next = NULL; |
---|
996 | return xml; |
---|
997 | } |
---|
998 | |
---|
999 | #ifdef EZXML_TEST // test harness |
---|
1000 | int main(int argc, char **argv) |
---|
1001 | { |
---|
1002 | ezxml_t xml; |
---|
1003 | char *s; |
---|
1004 | int i; |
---|
1005 | |
---|
1006 | if (argc != 2) return fprintf(stderr, "usage: %s xmlfile\n", argv[0]); |
---|
1007 | |
---|
1008 | xml = ezxml_parse_file(argv[1]); |
---|
1009 | printf("%s\n", (s = ezxml_toxml(xml))); |
---|
1010 | free(s); |
---|
1011 | i = fprintf(stderr, "%s", ezxml_error(xml)); |
---|
1012 | ezxml_free(xml); |
---|
1013 | return (i) ? 1 : 0; |
---|
1014 | } |
---|
1015 | #endif // EZXML_TEST |
---|