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1 //========================================================================== |
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2 // |
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3 // ezxml.h |
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4 // |
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5 // Simple XML parser |
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6 // |
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7 //========================================================================== |
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8 //####ECOSGPLCOPYRIGHTBEGIN#### |
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9 // ------------------------------------------- |
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10 // This file is part of eCos, the Embedded Configurable Operating System. |
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11 // Copyright (C) 2005 eCosCentric Ltd |
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12 // |
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13 // eCos is free software; you can redistribute it and/or modify it under |
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14 // the terms of the GNU General Public License as published by the Free |
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15 // Software Foundation; either version 2 or (at your option) any later version. |
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16 // |
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY |
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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20 // for more details. |
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21 // |
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22 // You should have received a copy of the GNU General Public License along |
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23 // with eCos; if not, write to the Free Software Foundation, Inc., |
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
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25 // |
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26 // As a special exception, if other files instantiate templates or use macros |
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27 // or inline functions from this file, or you compile this file and link it |
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28 // with other works to produce a work based on this file, this file does not |
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29 // by itself cause the resulting work to be covered by the GNU General Public |
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30 // License. However the source code for this file must still be made available |
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31 // in accordance with section (3) of the GNU General Public License. |
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32 // |
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33 // This exception does not invalidate any other reasons why a work based on |
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34 // this file might be covered by the GNU General Public License. |
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35 // |
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. |
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37 // at http://sources.redhat.com/ecos/ecos-license/ |
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38 // ------------------------------------------- |
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39 //####ECOSGPLCOPYRIGHTEND#### |
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40 //========================================================================== |
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41 //#####DESCRIPTIONBEGIN#### |
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42 // |
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43 // Author(s): Aaron Voisine |
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44 // Contributors: Matt Jerdonek |
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45 // Date: 2005-01-31 |
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46 // Purpose: |
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47 // Description: |
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48 // |
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49 // This code is part of eCos (tm). |
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50 // |
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51 //####DESCRIPTIONEND#### |
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52 // |
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53 //========================================================================== |
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54 |
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55 /* ezxml.c |
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56 * |
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57 * Copyright 2004, 2005 Aaron Voisine <aaron@voisine.org> |
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58 * |
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59 * Permission is hereby granted, free of charge, to any person obtaining |
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60 * a copy of this software and associated documentation files (the |
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61 * "Software"), to deal in the Software without restriction, including |
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62 * without limitation the rights to use, copy, modify, merge, publish, |
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63 * distribute, sublicense, and/or sell copies of the Software, and to |
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64 * permit persons to whom the Software is furnished to do so, subject to |
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65 * the following conditions: |
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66 * |
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67 * The above copyright notice and this permission notice shall be included |
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68 * in all copies or substantial portions of the Software. |
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69 * |
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70 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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71 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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72 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
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73 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
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74 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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75 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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76 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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77 */ |
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78 |
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79 #define EZXML_NOMMAP // no mmap on eCos |
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80 |
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81 #include <stdlib.h> |
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82 #include <stdio.h> |
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83 #include <stdarg.h> |
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84 #include <string.h> |
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85 #include <ctype.h> |
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86 #include <unistd.h> |
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87 #include <sys/types.h> |
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88 #ifndef EZXML_NOMMAP |
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89 #include <sys/mman.h> |
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90 #endif // EZXML_NOMMAP |
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91 #include <sys/stat.h> |
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92 #include "ezxml.h" |
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93 |
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94 #include <pkgconf/system.h> |
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95 |
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96 #define EZXML_WS "\t\r\n " // whitespace |
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97 #define EZXML_ERRL 128 // maximum error string length |
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98 |
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99 typedef struct ezxml_root *ezxml_root_t; |
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100 struct ezxml_root { // additional data for the root tag |
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101 struct ezxml xml; // is a super-struct built on top of ezxml struct |
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102 ezxml_t cur; // current xml tree insertion point |
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103 char *m; // original xml string |
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104 size_t len; // length of allocated memory for mmap, -1 for malloc |
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105 char *u; // UTF-8 conversion of string if original was UTF-16 |
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106 char *s; // start of work area |
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107 char *e; // end of work area |
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108 char **ent; // general entities (ampersand sequences) |
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109 char ***attr; // default attributes |
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110 char ***pi; // processing instructions |
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111 short standalone; // non-zero if <?xml standalone="yes"?> |
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112 char err[EZXML_ERRL]; // error string |
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113 }; |
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114 |
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115 char *EZXML_NIL[] = { NULL }; // empty, null terminated array of strings |
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116 |
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117 // returns the first child tag with the given name or NULL if not found |
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118 ezxml_t ezxml_child(ezxml_t xml, const char *name) |
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119 { |
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120 xml = (xml) ? xml->child : NULL; |
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121 while (xml && strcmp(name, xml->name)) xml = xml->sibling; |
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122 return xml; |
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123 } |
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124 |
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125 // returns the Nth tag with the same name in the same subsection or NULL if not |
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126 // found |
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127 ezxml_t ezxml_idx(ezxml_t xml, int idx) |
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128 { |
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129 for (; xml && idx; idx--) xml = xml->next; |
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130 return xml; |
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131 } |
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132 |
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133 // returns the value of the requested tag attribute or NULL if not found |
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134 const char *ezxml_attr(ezxml_t xml, const char *attr) |
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135 { |
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136 int i = 0, j = 1; |
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137 ezxml_root_t root = (ezxml_root_t)xml; |
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138 |
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139 if (! xml || ! xml->attr) return NULL; |
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140 while (xml->attr[i] && strcmp(attr, xml->attr[i])) i += 2; |
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141 if (xml->attr[i]) return xml->attr[i + 1]; // found attribute |
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142 |
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143 while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag |
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144 for (i = 0; root->attr[i] && strcmp(xml->name, root->attr[i][0]); i++); |
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145 if (! root->attr[i]) return NULL; // no matching default attributes |
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146 while (root->attr[i][j] && strcmp(attr, root->attr[i][j])) j += 3; |
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147 return (root->attr[i][j]) ? root->attr[i][j + 1] : NULL; // found default |
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148 } |
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149 |
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150 // same as ezxml_get but takes an already initialized va_list |
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151 ezxml_t ezxml_vget(ezxml_t xml, va_list ap) |
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152 { |
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153 char *name = va_arg(ap, char *); |
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154 int idx = -1; |
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155 |
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156 if (name && *name) { |
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157 idx = va_arg(ap, int); |
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158 xml = ezxml_child(xml, name); |
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159 } |
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160 return (idx < 0) ? xml : ezxml_vget(ezxml_idx(xml, idx), ap); |
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161 } |
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162 |
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163 // Traverses the xml tree to retrieve a specific subtag. Takes a variable |
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164 // length list of tag names and indexes. The argument list must be terminated |
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165 // by either an index of -1 or an empty string tag name. Example: |
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166 // title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1); |
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167 // This retrieves the title of the 3rd book on the 1st shelf of library. |
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168 // Returns NULL if not found. |
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169 ezxml_t ezxml_get(ezxml_t xml, ...) |
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170 { |
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171 va_list ap; |
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172 ezxml_t r; |
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173 |
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174 va_start(ap, xml); |
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175 r = ezxml_vget(xml, ap); |
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176 va_end(ap); |
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177 return r; |
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178 } |
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179 |
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180 // returns a null terminated array of processing instructions for the given |
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181 // target |
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182 const char **ezxml_pi(ezxml_t xml, const char *target) |
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183 { |
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184 ezxml_root_t root = (ezxml_root_t)xml; |
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185 int i = 0; |
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186 |
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187 if (! root) return (const char **)EZXML_NIL; |
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188 while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag |
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189 while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; // find target |
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190 return (const char **)((root->pi[i]) ? root->pi[i] + 1 : EZXML_NIL); |
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191 } |
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192 |
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193 // set an error string and return root |
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194 ezxml_t ezxml_err(ezxml_root_t root, char *s, const char *err, ...) |
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195 { |
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196 va_list ap; |
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197 int line = 1; |
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198 char *t, fmt[EZXML_ERRL]; |
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199 |
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200 for (t = root->s; t < s; t++) if (*t == '\n') line++; |
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201 snprintf(fmt, EZXML_ERRL, "[error near line %d]: %s", line, err); |
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202 |
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203 va_start(ap, err); |
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204 vsnprintf(root->err, EZXML_ERRL, fmt, ap); |
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205 va_end(ap); |
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206 |
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207 return &root->xml; |
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208 } |
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209 |
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210 // Recursively decodes entity and character references and normalizes new lines |
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211 // ent is a null terminated array of alternating entity names and values. set t |
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212 // to '&' for general entity decoding, '%' for parameter entity decoding, 'c' |
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213 // for cdata sections, ' ' for attribute normalization, or '*' for non-cdata |
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214 // attribute normalization. Returns s, or if the decoded string is longer than |
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215 // s, returns a malloced string that must be freed. |
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216 char *ezxml_decode(char *s, char **ent, char t) |
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217 { |
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218 char *e, *r = s, *m = s; |
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219 long b, c, d, l; |
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220 |
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221 for (; *s; s++) { // normalize line endings |
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222 while (*s == '\r') { |
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223 *(s++) = '\n'; |
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224 if (*s == '\n') memmove(s, (s + 1), strlen(s)); |
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225 } |
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226 } |
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227 |
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228 for (s = r; ; ) { |
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229 while (*s && *s != '&' && (*s != '%' || t != '%') && !isspace(*s)) s++; |
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230 |
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231 if (! *s) break; |
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232 else if (t != 'c' && ! strncmp(s, "&#", 2)) { // character reference |
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233 if (s[2] == 'x') c = strtol(s + 3, &e, 16); // base 16 |
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234 else c = strtol(s + 2, &e, 10); // base 10 |
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235 if (! c || *e != ';') { s++; continue; } // not a character ref |
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236 |
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237 if (c < 0x80) *(s++) = c; // US-ASCII subset |
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238 else { // multi-byte UTF-8 sequence |
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239 for (b = 0, d = c; d; d /= 2) b++; // number of bits in c |
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240 b = (b - 2) / 5; // number of bytes in payload |
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241 *(s++) = (0xFF << (7 - b)) | (c >> (6 * b)); // head |
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242 while (b) *(s++) = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload |
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243 } |
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244 |
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245 memmove(s, strchr(s, ';') + 1, strlen(strchr(s, ';'))); |
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246 } |
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247 else if ((*s == '&' && (t == '&' || t == ' ' || t == '*')) || |
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248 (*s == '%' && t == '%')) { // entity reference |
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249 for (b = 0; ent[b] && strncmp(s + 1, ent[b], strlen(ent[b])); |
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250 b += 2); // find entity in entity list |
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251 |
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252 if (ent[b++]) { // found a match |
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253 if ((c = strlen(ent[b])) - 1 > (e = strchr(s, ';')) - s) { |
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254 l = (d = (s - r)) + c + strlen(e); // new length |
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255 r = (r == m) ? strcpy(malloc(l), r) : realloc(r, l); |
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256 e = strchr((s = r + d), ';'); // fix up pointers |
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257 } |
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258 |
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259 memmove(s + c, e + 1, strlen(e)); // shift rest of string |
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260 strncpy(s, ent[b], c); // copy in replacement text |
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261 } |
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262 else s++; // not a known entity |
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263 } |
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264 else if ((t == ' ' || t == '*') && isspace(*s)) *(s++) = ' '; |
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265 else s++; // no decoding needed |
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266 } |
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267 |
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268 if (t == '*') { // normalize spaces for non-cdata attributes |
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269 for (s = r; *s; s++) { |
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270 if ((l = strspn(s, " "))) memmove(s, s + l, strlen(s + l) + 1); |
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271 while (*s && *s != ' ') s++; |
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272 } |
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273 if (--s >= r && *s == ' ') *s = '\0'; // trim any trailing space |
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274 } |
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275 return r; |
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276 } |
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277 |
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278 // called when parser finds start of new tag |
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279 void ezxml_open_tag(ezxml_root_t root, char *name, char **attr) |
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280 { |
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281 ezxml_t xml = root->cur; |
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282 |
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283 if (xml->name) xml = ezxml_add_child(xml, name, strlen(xml->txt)); |
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284 else xml->name = name; // first open tag |
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285 |
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286 xml->attr = attr; |
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287 root->cur = xml; // update tag insertion point |
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288 } |
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289 |
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290 // called when parser finds character content between open and closing tag |
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291 void ezxml_char_content(ezxml_root_t root, char *s, size_t len, char t) |
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292 { |
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293 ezxml_t xml = root->cur; |
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294 char *m = s; |
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295 size_t l; |
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296 |
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297 if (! xml || ! xml->name || ! len) return; // sanity check |
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298 |
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299 s[len] = '\0'; // null terminate text (calling functions anticipate this) |
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300 len = strlen(s = ezxml_decode(s, root->ent, t)) + 1; |
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301 |
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302 if (! *(xml->txt)) xml->txt = s; // initial character content |
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303 else { // allocate our own memory and make a copy |
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304 xml->txt = (xml->flags & EZXML_TXTM) // allocate some space |
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305 ? realloc(xml->txt, (l = strlen(xml->txt)) + len) |
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306 : strcpy(malloc((l = strlen(xml->txt)) + len), xml->txt); |
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307 strcpy(xml->txt + l, s); // add new char content |
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308 if (s != m) free(s); // free s if it was malloced by ezxml_decode() |
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309 } |
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310 |
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311 if (xml->txt != m) ezxml_set_flag(xml, EZXML_TXTM); |
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312 } |
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313 |
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314 // called when parser finds closing tag |
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315 ezxml_t ezxml_close_tag(ezxml_root_t root, char *name, char *s) |
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316 { |
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317 if (! root->cur || ! root->cur->name || strcmp(name, root->cur->name)) |
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318 return ezxml_err(root, s, "unexpected closing tag </%s>", name); |
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319 |
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320 root->cur = root->cur->parent; |
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321 return NULL; |
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322 } |
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323 |
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324 // checks for circular entity references, returns non-zero if no circular |
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325 // references are found, zero otherwise |
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326 int ezxml_ent_ok(char *name, char *s, char **ent) |
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327 { |
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328 int i; |
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329 |
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330 for (; ; s++) { |
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331 while (*s && *s != '&') s++; // find next entity reference |
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332 if (! *s) return 1; |
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333 if (! strncmp(s + 1, name, strlen(name))) return 0; // circular ref. |
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334 for (i = 0; ent[i] && strncmp(ent[i], s + 1, strlen(ent[i])); i += 2); |
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335 if (ent[i] && ! ezxml_ent_ok(name, ent[i + 1], ent)) return 0; |
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336 } |
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337 } |
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338 |
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339 // called when the parser finds a processing instruction |
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340 void ezxml_proc_inst(ezxml_root_t root, char *s, size_t len) |
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341 { |
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342 int i = 0, j = 1; |
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343 char *target = s; |
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344 |
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345 s[len] = '\0'; // null terminate instruction |
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346 if (*(s += strcspn(s, EZXML_WS))) { |
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347 *s = '\0'; // null terminate target |
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348 s += strspn(s + 1, EZXML_WS) + 1; // skip whitespace after target |
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349 } |
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350 |
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351 if (! strcmp(target, "xml")) { // <?xml ... ?> |
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352 if ((s = strstr(s, "standalone")) && ! strncmp(s + strspn(s + 10, |
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353 EZXML_WS "='\"") + 10, "yes", 3)) root->standalone = 1; |
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354 return; |
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355 } |
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356 |
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357 if (! root->pi[0]) *(root->pi = malloc(sizeof(char **))) = NULL; //first pi |
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358 |
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359 while (root->pi[i] && strcmp(target, root->pi[i][0])) i++; // find target |
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360 if (! root->pi[i]) { // new target |
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361 root->pi = realloc(root->pi, sizeof(char **) * (i + 2)); |
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362 root->pi[i] = malloc(sizeof(char *) * 3); |
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363 root->pi[i][0] = target; |
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364 root->pi[i][1] = (char *)(root->pi[i + 1] = NULL); // terminate pi list |
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365 root->pi[i][2] = strdup(""); // empty document position list |
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366 } |
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367 |
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368 while (root->pi[i][j]) j++; // find end of instruction list for this target |
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369 root->pi[i] = realloc(root->pi[i], sizeof(char *) * (j + 3)); |
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370 root->pi[i][j + 2] = realloc(root->pi[i][j + 1], j + 1); |
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371 strcpy(root->pi[i][j + 2] + j - 1, (root->xml.name) ? ">" : "<"); |
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372 root->pi[i][j + 1] = NULL; // null terminate pi list for this target |
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373 root->pi[i][j] = s; // set instruction |
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374 } |
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375 |
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376 // called when the parser finds an internal doctype subset |
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377 short ezxml_internal_dtd(ezxml_root_t root, char *s, size_t len) |
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|
378 { |
|
2122
|
379 char q, *c, *t, *n = NULL, *v, **ent, **pe; |
|
|
380 int i, j; |
|
|
381 |
|
|
382 pe = memcpy(malloc(sizeof(EZXML_NIL)), EZXML_NIL, sizeof(EZXML_NIL)); |
|
|
383 |
|
|
384 for (s[len] = '\0'; s; ) { |
|
|
385 while (*s && *s != '<' && *s != '%') s++; // find next declaration |
|
|
386 |
|
|
387 if (! *s) break; |
|
|
388 else if (! strncmp(s, "<!ENTITY", 8)) { // parse entity definitions |
|
|
389 c = s += strspn(s + 8, EZXML_WS) + 8; // skip white space separator |
|
|
390 n = s + strspn(s, EZXML_WS "%"); // find name |
|
|
391 *(s = n + strcspn(n, EZXML_WS)) = ';'; // append ; to name |
|
|
392 |
|
|
393 v = s + strspn(s + 1, EZXML_WS) + 1; // find value |
|
|
394 if ((q = *(v++)) != '"' && q != '\'') { // skip externals |
|
|
395 s = strchr(s, '>'); |
|
|
396 continue; |
|
|
397 } |
|
|
398 |
|
|
399 for (i = 0, ent = (*c == '%') ? pe : root->ent; ent[i]; i++); |
|
|
400 ent = realloc(ent, (i + 3) * sizeof(char *)); // space for next ent |
|
|
401 if (*c == '%') pe = ent; |
|
|
402 else root->ent = ent; |
|
|
403 |
|
|
404 *(++s) = '\0'; // null terminate name |
|
|
405 if ((s = strchr(v, q))) *(s++) = '\0'; // null terminate value |
|
|
406 ent[i + 1] = ezxml_decode(v, pe, '%'); // set value |
|
|
407 ent[i + 2] = NULL; // null terminate entity list |
|
|
408 if (! ezxml_ent_ok(n, ent[i + 1], ent)) { // circular reference |
|
|
409 if (ent[i + 1] != v) free(ent[i + 1]); |
|
|
410 ezxml_err(root, v, "circular entity declaration &%s", n); |
|
|
411 break; |
|
|
412 } |
|
|
413 else ent[i] = n; // set entity name |
|
|
414 } |
|
|
415 else if (! strncmp(s, "<!ATTLIST", 9)) { // parse default attributes |
|
|
416 t = s + strspn(s + 9, EZXML_WS) + 9; // skip whitespace separator |
|
|
417 if (! *t) { ezxml_err(root, t, "unclosed <!ATTLIST"); break; } |
|
|
418 if (*(s = t + strcspn(t, EZXML_WS ">")) == '>') continue; |
|
|
419 else *s = '\0'; // null terminate tag name |
|
|
420 for (i = 0; root->attr[i] && strcmp(n, root->attr[i][0]); i++); |
|
|
421 |
|
|
422 while (*(n = ++s + strspn(s, EZXML_WS)) && *n != '>') { |
|
|
423 if (*(s = n + strcspn(n, EZXML_WS))) *s = '\0'; // attr name |
|
|
424 else { ezxml_err(root, t, "malformed <!ATTLIST"); break; } |
|
|
425 |
|
|
426 s += strspn(s + 1, EZXML_WS) + 1; // find next token |
|
|
427 c = (strncmp(s, "CDATA", 5)) ? "*" : " "; // is it cdata? |
|
|
428 if (! strncmp(s, "NOTATION", 8)) |
|
|
429 s += strspn(s + 8, EZXML_WS) + 8; |
|
|
430 s = (*s == '(') ? strchr(s, ')') : s + strcspn(s, EZXML_WS); |
|
|
431 if (! s) { ezxml_err(root, t, "malformed <!ATTLIST"); break; } |
|
|
432 |
|
|
433 s += strspn(s, EZXML_WS ")"); // skip white space separator |
|
|
434 if (! strncmp(s, "#FIXED", 6)) |
|
|
435 s += strspn(s + 6, EZXML_WS) + 6; |
|
|
436 if (*s == '#') { // no default value |
|
|
437 s += strcspn(s, EZXML_WS ">") - 1; |
|
|
438 if (*c == ' ') continue; // cdata is default, nothing to do |
|
|
439 v = NULL; |
|
|
440 } |
|
|
441 else if ((*s == '"' || *s == '\'') && // default value |
|
|
442 (s = strchr(v = s + 1, *s))) *s = '\0'; |
|
|
443 else { ezxml_err(root, t, "malformed <!ATTLIST"); break; } |
|
|
444 |
|
|
445 if (! root->attr[i]) { // new tag name |
|
|
446 root->attr = (! i) ? malloc(2 * sizeof(char **)) |
|
|
447 : realloc(root->attr, |
|
|
448 (i + 2) * sizeof(char **)); |
|
|
449 root->attr[i] = malloc(2 * sizeof(char *)); |
|
|
450 root->attr[i][0] = t; // set tag name |
|
|
451 root->attr[i][1] = (char *)(root->attr[i + 1] = NULL); |
|
|
452 } |
|
|
453 |
|
|
454 for (j = 1; root->attr[i][j]; j += 3); // find end of list |
|
|
455 root->attr[i] = realloc(root->attr[i], |
|
|
456 (j + 4) * sizeof(char *)); |
|
|
457 |
|
|
458 root->attr[i][j + 3] = NULL; // null terminate list |
|
|
459 root->attr[i][j + 2] = c; // is it cdata? |
|
|
460 root->attr[i][j + 1] = (v) ? ezxml_decode(v, root->ent, *c) |
|
|
461 : NULL; |
|
|
462 root->attr[i][j] = n; // attribute name |
|
|
463 } |
|
|
464 } |
|
|
465 else if (! strncmp(s, "<!--", 4)) s = strstr(s + 4, "-->"); // comments |
|
|
466 else if (! strncmp(s, "<?", 2)) { // processing instructions |
|
|
467 if ((s = strstr(c = s + 2, "?>"))) |
|
|
468 ezxml_proc_inst(root, c, s++ - c); |
|
|
469 } |
|
|
470 else if (*s == '<') s = strchr(s, '>'); // skip other declarations |
|
|
471 else if (*(s++) == '%' && ! root->standalone) break; |
|
|
472 } |
|
|
473 |
|
|
474 free(pe); |
|
|
475 return ! *root->err; |
|
|
476 } |
|
|
477 |
|
|
478 // Converts a UTF-16 string to UTF-8. Returns a new string that must be freed |
|
|
479 // or NULL if no conversion was needed. |
|
|
480 char *ezxml_str2utf8(char **s, size_t *len) |
|
|
481 { |
|
|
482 char *u; |
|
|
483 size_t l = 0, sl, max = *len; |
|
|
484 long c, d; |
|
|
485 int b, be = (**s == '\xFE') ? 1 : (**s == '\xFF') ? 0 : -1; |
|
|
486 |
|
|
487 if (be == -1) return NULL; // not UTF-16 |
|
|
488 |
|
|
489 u = malloc(max); |
|
|
490 for (sl = 2; sl < *len - 1; sl += 2) { |
|
|
491 c = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) //UTF-16BE |
|
|
492 : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); //UTF-16LE |
|
|
493 if (c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1) { // high-half |
|
|
494 d = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF) |
|
|
495 : (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF); |
|
|
496 c = (((c & 0x3FF) << 10) | (d & 0x3FF)) + 0x10000; |
|
|
497 } |
|
|
498 |
|
|
499 while (l + 6 > max) u = realloc(u, max += EZXML_BUFSIZE); |
|
|
500 if (c < 0x80) u[l++] = c; // US-ASCII subset |
|
|
501 else { // multi-byte UTF-8 sequence |
|
|
502 for (b = 0, d = c; d; d /= 2) b++; // bits in c |
|
|
503 b = (b - 2) / 5; // bytes in payload |
|
|
504 u[l++] = (0xFF << (7 - b)) | (c >> (6 * b)); // head |
|
|
505 while (b) u[l++] = 0x80 | ((c >> (6 * --b)) & 0x3F); // payload |
|
|
506 } |
|
|
507 } |
|
|
508 return *s = realloc(u, *len = l); |
|
|
509 } |
|
|
510 |
|
|
511 // frees a tag attribute list |
|
|
512 void ezxml_free_attr(char **attr) { |
|
|
513 int i = 0; |
|
|
514 char *m; |
|
|
515 |
|
|
516 if (! attr || attr == EZXML_NIL) return; // nothing to free |
|
|
517 while (attr[i]) i += 2; // find end of attribute list |
|
|
518 m = attr[i + 1]; // list of which names and values are malloced |
|
|
519 for (i = 0; m[i]; i++) { |
|
|
520 if (m[i] & EZXML_NAMEM) free(attr[i * 2]); |
|
|
521 if (m[i] & EZXML_TXTM) free(attr[(i * 2) + 1]); |
|
|
522 } |
|
|
523 free(m); |
|
|
524 free(attr); |
|
1884
|
525 } |
|
|
526 |
|
|
527 // parse the given xml string and return an ezxml structure |
|
|
528 ezxml_t ezxml_parse_str(char *s, size_t len) |
|
|
529 { |
|
2122
|
530 ezxml_root_t root = (ezxml_root_t)ezxml_new(NULL); |
|
|
531 char q, e, *d, **attr, **a = NULL; // initialize a to avoid compile warning |
|
|
532 int l, i, j; |
|
1884
|
533 |
|
2122
|
534 root->m = s; |
|
|
535 if (! len) return ezxml_err(root, s, "root tag missing"); |
|
|
536 root->u = ezxml_str2utf8(&s, &len); // convert utf-16 to utf-8 |
|
|
537 root->e = (root->s = s) + len; // record start and end of work area |
|
1884
|
538 |
|
2122
|
539 e = s[len - 1]; // save end char |
|
|
540 s[len - 1] = '\0'; // turn end char into null terminator |
|
1884
|
541 |
|
|
542 while (*s && *s != '<') s++; // find first tag |
|
2122
|
543 if (! *s) return ezxml_err(root, s, "root tag missing"); |
|
1884
|
544 |
|
2122
|
545 for (; ; ) { |
|
|
546 attr = (char **)EZXML_NIL; |
|
1884
|
547 d = ++s; |
|
|
548 |
|
|
549 if (isalpha(*s) || *s == '_' || *s == ':') { // new tag |
|
2122
|
550 if (! root->cur) |
|
|
551 return ezxml_err(root, d, "markup outside of root element"); |
|
1884
|
552 |
|
|
553 s += strcspn(s, EZXML_WS "/>"); |
|
2122
|
554 while (isspace(*s)) *(s++) = '\0'; // null terminate tag name |
|
1884
|
555 |
|
2122
|
556 if (*s && *s != '/' && *s != '>') // find tag in default attr list |
|
|
557 for (i = 0; (a = root->attr[i]) && strcmp(a[0], d); i++); |
|
|
558 |
|
|
559 for (l = 0; *s && *s != '/' && *s != '>'; l += 2) { // new attrib |
|
|
560 attr = (l) ? realloc(attr, (l + 4) * sizeof(char *)) |
|
|
561 : malloc(4 * sizeof(char *)); // allocate space |
|
|
562 attr[l + 3] = (l) ? realloc(attr[l + 1], (l / 2) + 2) |
|
|
563 : malloc(2); // mem for list of maloced vals |
|
|
564 strcpy(attr[l + 3] + (l / 2), " "); // value is not malloced |
|
|
565 attr[l + 2] = NULL; // null terminate list |
|
|
566 attr[l + 1] = ""; // temporary attribute value |
|
|
567 attr[l] = s; // set attribute name |
|
1884
|
568 |
|
|
569 s += strcspn(s, EZXML_WS "=/>"); |
|
|
570 if (*s == '=' || isspace(*s)) { |
|
2122
|
571 *(s++) = '\0'; // null terminate tag attribute name |
|
1884
|
572 q = *(s += strspn(s, EZXML_WS "=")); |
|
|
573 if (q == '"' || q == '\'') { // attribute value |
|
|
574 attr[l + 1] = ++s; |
|
|
575 while (*s && *s != q) s++; |
|
2122
|
576 if (*s) *(s++) = '\0'; // null terminate attribute val |
|
1884
|
577 else { |
|
2122
|
578 ezxml_free_attr(attr); |
|
|
579 return ezxml_err(root, d, "missing %c", q); |
|
1884
|
580 } |
|
2122
|
581 |
|
|
582 for (j = 1; a && a[j] && strcmp(a[j], attr[l]); j +=3); |
|
|
583 attr[l + 1] = ezxml_decode(attr[l + 1], root->ent, (a |
|
|
584 && a[j]) ? *a[j + 2] : ' '); |
|
|
585 if (attr[l + 1] < d || attr[l + 1] > s) |
|
|
586 attr[l + 3][l / 2] = EZXML_TXTM; // value malloced |
|
1884
|
587 } |
|
|
588 } |
|
2122
|
589 while (isspace(*s)) s++; |
|
1884
|
590 } |
|
|
591 |
|
|
592 if (*s == '/') { // self closing tag |
|
|
593 *(s++) = '\0'; |
|
|
594 if ((*s && *s != '>') || (! *s && e != '>')) { |
|
2122
|
595 if (l) ezxml_free_attr(attr); |
|
|
596 return ezxml_err(root, d, "missing >"); |
|
1884
|
597 } |
|
|
598 ezxml_open_tag(root, d, attr); |
|
2122
|
599 ezxml_close_tag(root, d, s); |
|
1884
|
600 } |
|
2122
|
601 else if ((q = *s) == '>' || (! *s && e == '>')) { // open tag |
|
|
602 *s = '\0'; // temporarily null terminate tag name |
|
1884
|
603 ezxml_open_tag(root, d, attr); |
|
|
604 *s = q; |
|
|
605 } |
|
|
606 else { |
|
2122
|
607 if (l) ezxml_free_attr(attr); |
|
|
608 return ezxml_err(root, d, "missing >"); |
|
1884
|
609 } |
|
|
610 } |
|
|
611 else if (*s == '/') { // close tag |
|
2122
|
612 s += strcspn(d = s + 1, EZXML_WS ">") + 1; |
|
|
613 if (! (q = *s) && e != '>') return ezxml_err(root, d, "missing >"); |
|
|
614 *s = '\0'; // temporarily null terminate tag name |
|
|
615 if (ezxml_close_tag(root, d, s)) return &root->xml; |
|
|
616 if (isspace(*s = q)) s += strspn(s, EZXML_WS); |
|
1884
|
617 } |
|
|
618 else if (! strncmp(s, "!--", 3)) { // comment |
|
2122
|
619 if (! (s = strstr(s + 3, "--")) || (*(s += 2) != '>' && *s) || |
|
|
620 (! *s && e != '>')) return ezxml_err(root, d, "unclosed <!--"); |
|
1884
|
621 } |
|
|
622 else if (! strncmp(s, "![CDATA[", 8)) { // cdata |
|
|
623 if ((s = strstr(s, "]]>"))) |
|
2122
|
624 ezxml_char_content(root, d + 8, (s += 2) - d - 10, 'c'); |
|
|
625 else return ezxml_err(root, d, "unclosed <![CDATA["); |
|
1884
|
626 } |
|
2122
|
627 else if (! strncmp(s, "!DOCTYPE", 8)) { // dtd |
|
1884
|
628 for (l = 0; *s && ((! l && *s != '>') || (l && (*s != ']' || |
|
2122
|
629 *(s + strspn(s + 1, EZXML_WS) + 1) != '>'))); |
|
1884
|
630 l = (*s == '[') ? 1 : l) s += strcspn(s + 1, "[]>") + 1; |
|
2122
|
631 if (! *s && e != '>') |
|
|
632 return ezxml_err(root, d, "unclosed <!DOCTYPE"); |
|
|
633 d = (l) ? strchr(d, '[') + 1 : d; |
|
|
634 if (l && ! ezxml_internal_dtd(root, d, s++ - d)) return &root->xml; |
|
1884
|
635 } |
|
|
636 else if (*s == '?') { // <?...?> processing instructions |
|
|
637 do { s = strchr(s, '?'); } while (s && *(++s) && *s != '>'); |
|
|
638 if (! s || (! *s && e != '>')) |
|
2122
|
639 return ezxml_err(root, d, "unclosed <?"); |
|
1884
|
640 else ezxml_proc_inst(root, d + 1, s - d - 2); |
|
|
641 } |
|
2122
|
642 else return ezxml_err(root, d, "unexpected <"); |
|
1884
|
643 |
|
|
644 if (! s || ! *s) break; |
|
|
645 *s = '\0'; |
|
|
646 d = ++s; |
|
|
647 if (*s && *s != '<') { // tag character content |
|
|
648 while (*s && *s != '<') s++; |
|
2122
|
649 if (*s) ezxml_char_content(root, d, s - d, '&'); |
|
1884
|
650 else break; |
|
|
651 } |
|
|
652 else if (! *s) break; |
|
|
653 } |
|
2122
|
654 |
|
|
655 if (! root->cur) return &root->xml; |
|
|
656 else if (! root->cur->name) return ezxml_err(root, d, "root tag missing"); |
|
|
657 else return ezxml_err(root, d, "unclosed tag <%s>", root->cur->name); |
|
1884
|
658 } |
|
|
659 |
|
|
660 #ifdef CYGPKG_IO_FILEIO |
|
|
661 // Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire |
|
|
662 // stream into memory and then parses it. For xml files, use ezxml_parse_file() |
|
|
663 // or ezxml_parse_fd() |
|
|
664 ezxml_t ezxml_parse_fp(FILE *fp) |
|
|
665 { |
|
2122
|
666 ezxml_root_t root; |
|
|
667 size_t l, len = 0; |
|
|
668 char *s; |
|
1884
|
669 |
|
2122
|
670 if (! (s = malloc(EZXML_BUFSIZE))) return NULL; |
|
1884
|
671 do { |
|
2122
|
672 len += (l = fread((s + len), 1, EZXML_BUFSIZE, fp)); |
|
|
673 if (l == EZXML_BUFSIZE) s = realloc(s, len + EZXML_BUFSIZE); |
|
|
674 } while (s && l == EZXML_BUFSIZE); |
|
1884
|
675 |
|
|
676 if (! s) return NULL; |
|
2122
|
677 root = (ezxml_root_t)ezxml_parse_str(s, len); |
|
|
678 root->len = -1; // so we know to free s in ezxml_free() |
|
|
679 return &root->xml; |
|
1884
|
680 } |
|
|
681 |
|
|
682 // A wrapper for ezxml_parse_str() that accepts a file descriptor. First |
|
|
683 // attempts to mem map the file. Failing that, reads the file into memory. |
|
|
684 // Returns NULL on failure. |
|
|
685 ezxml_t ezxml_parse_fd(int fd) |
|
|
686 { |
|
2122
|
687 ezxml_root_t root; |
|
|
688 struct stat st; |
|
|
689 size_t l; |
|
1884
|
690 void *m; |
|
|
691 |
|
|
692 if (fd < 0) return NULL; |
|
2122
|
693 fstat(fd, &st); |
|
1884
|
694 |
|
2122
|
695 #ifndef EZXML_NOMMAP |
|
|
696 l = (st.st_size + sysconf(_SC_PAGESIZE) - 1) & ~(sysconf(_SC_PAGESIZE) -1); |
|
|
697 if ((m = mmap(NULL, l, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0)) != |
|
1884
|
698 MAP_FAILED) { |
|
2122
|
699 madvise(m, l, MADV_SEQUENTIAL); // optimize for sequential access |
|
|
700 root = (ezxml_root_t)ezxml_parse_str(m, st.st_size); |
|
|
701 madvise(m, root->len = l, MADV_NORMAL); // put it back to normal |
|
1884
|
702 } |
|
|
703 else { // mmap failed, read file into memory |
|
2122
|
704 #endif // EZXML_NOMMAP |
|
|
705 l = read(fd, m = malloc(st.st_size), st.st_size); |
|
|
706 root = (ezxml_root_t)ezxml_parse_str(m, l); |
|
|
707 root->len = -1; // so we know to free s in ezxml_free() |
|
|
708 #ifndef EZXML_NOMMAP |
|
1884
|
709 } |
|
2122
|
710 #endif // EZXML_NOMMAP |
|
|
711 return &root->xml; |
|
1884
|
712 } |
|
|
713 |
|
|
714 // a wrapper for ezxml_parse_fd that accepts a file name |
|
|
715 ezxml_t ezxml_parse_file(const char *file) |
|
|
716 { |
|
|
717 int fd = open(file, O_RDONLY, 0); |
|
2122
|
718 ezxml_t xml = ezxml_parse_fd(fd); |
|
1884
|
719 |
|
|
720 if (fd >= 0) close(fd); |
|
2122
|
721 return xml; |
|
1884
|
722 } |
|
2122
|
723 #endif // CYGPKG_IO_FILEIO |
|
|
724 |
|
|
725 // Encodes ampersand sequences appending the results to *dst, reallocating *dst |
|
|
726 // if length excedes max. a is non-zero for attribute encoding. Returns *dst |
|
1884
|
727 char *ezxml_ampencode(const char *s, size_t len, char **dst, size_t *dlen, |
|
2122
|
728 size_t *max, short a) |
|
1884
|
729 { |
|
|
730 const char *e; |
|
|
731 |
|
|
732 for (e = s + len; s != e; s++) { |
|
|
733 while (*dlen + 10 > *max) *dst = realloc(*dst, *max += EZXML_BUFSIZE); |
|
|
734 |
|
|
735 switch (*s) { |
|
|
736 case '\0': return *dst; |
|
|
737 case '&': *dlen += sprintf(*dst + *dlen, "&"); break; |
|
|
738 case '<': *dlen += sprintf(*dst + *dlen, "<"); break; |
|
|
739 case '>': *dlen += sprintf(*dst + *dlen, ">"); break; |
|
2122
|
740 case '"': *dlen += sprintf(*dst + *dlen, (a) ? """ : "\""); break; |
|
|
741 case '\n': *dlen += sprintf(*dst + *dlen, (a) ? "
" : "\n"); break; |
|
|
742 case '\t': *dlen += sprintf(*dst + *dlen, (a) ? "	" : "\t"); break; |
|
|
743 case '\r': *dlen += sprintf(*dst + *dlen, "
"); break; |
|
|
744 default: (*dst)[(*dlen)++] = *s; |
|
1884
|
745 } |
|
|
746 } |
|
|
747 return *dst; |
|
|
748 } |
|
|
749 |
|
2122
|
750 // Recursively converts each tag to xml appending it to *s. Reallocates *s if |
|
|
751 // its length excedes max. start is the location of the previous tag in the |
|
|
752 // parent tag's character content. Returns *s. |
|
1884
|
753 char *ezxml_toxml_r(ezxml_t xml, char **s, size_t *len, size_t *max, |
|
2122
|
754 size_t start, char ***attr) |
|
1884
|
755 { |
|
2122
|
756 int i, j; |
|
1884
|
757 char *txt = (xml->parent) ? xml->parent->txt : ""; |
|
2122
|
758 size_t off = 0; |
|
1884
|
759 |
|
|
760 // parent character content up to this tag |
|
2122
|
761 *s = ezxml_ampencode(txt + start, xml->off - start, s, len, max, 0); |
|
1884
|
762 |
|
|
763 while (*len + strlen(xml->name) + 4 > *max) // reallocate s |
|
|
764 *s = realloc(*s, *max += EZXML_BUFSIZE); |
|
|
765 |
|
|
766 *len += sprintf(*s + *len, "<%s", xml->name); // open tag |
|
|
767 for (i = 0; xml->attr[i]; i += 2) { // tag attributes |
|
2122
|
768 if (ezxml_attr(xml, xml->attr[i]) != xml->attr[i + 1]) continue; |
|
1884
|
769 while (*len + strlen(xml->attr[i]) + 7 > *max) // reallocate s |
|
|
770 *s = realloc(*s, *max += EZXML_BUFSIZE); |
|
|
771 |
|
|
772 *len += sprintf(*s + *len, " %s=\"", xml->attr[i]); |
|
2122
|
773 ezxml_ampencode(xml->attr[i + 1], -1, s, len, max, 1); |
|
1884
|
774 *len += sprintf(*s + *len, "\""); |
|
|
775 } |
|
|
776 |
|
2122
|
777 for (i = 0; attr[i] && strcmp(attr[i][0], xml->name); i++); |
|
|
778 for (j = 1; attr[i] && attr[i][j]; j += 3) { // default attributes |
|
|
779 if (! attr[i][j + 1] || ezxml_attr(xml, attr[i][j]) != attr[i][j + 1]) |
|
|
780 continue; // skip duplicates and non-values |
|
|
781 while (*len + strlen(attr[i][j]) + 7 > *max) // reallocate s |
|
1884
|
782 *s = realloc(*s, *max += EZXML_BUFSIZE); |
|
|
783 |
|
2122
|
784 *len += sprintf(*s + *len, " %s=\"", attr[i][j]); |
|
|
785 ezxml_ampencode(attr[i][j + 1], -1, s, len, max, 1); |
|
|
786 *len += sprintf(*s + *len, "\""); |
|
1884
|
787 } |
|
2122
|
788 *len += sprintf(*s + *len, ">"); |
|
1884
|
789 |
|
2122
|
790 *s = (xml->child) ? ezxml_toxml_r(xml->child, s, len, max, 0, attr) //child |
|
|
791 : ezxml_ampencode(xml->txt, -1, s, len, max, 0); //data |
|
|
792 |
|
|
793 while (*len + strlen(xml->name) + 4 > *max) // reallocate s |
|
|
794 *s = realloc(*s, *max += EZXML_BUFSIZE); |
|
|
795 |
|
|
796 *len += sprintf(*s + *len, "</%s>", xml->name); // close tag |
|
|
797 |
|
|
798 while (txt[off] && off < xml->off) off++; // make sure off is within bounds |
|
|
799 return (xml->ordered) ? ezxml_toxml_r(xml->ordered, s, len, max, off, attr) |
|
|
800 : ezxml_ampencode(txt + off, -1, s, len, max, 0); |
|
1884
|
801 } |
|
|
802 |
|
|
803 // converts an ezxml structure back to xml, returning it as a string that must |
|
|
804 // be freed |
|
|
805 char *ezxml_toxml(ezxml_t xml) |
|
|
806 { |
|
2122
|
807 ezxml_t p = (xml) ? xml->parent : NULL, o = (xml) ? xml->ordered : NULL; |
|
|
808 ezxml_root_t root = (ezxml_root_t)xml; |
|
1884
|
809 size_t len = 0, max = EZXML_BUFSIZE; |
|
2122
|
810 char *s = strcpy(malloc(max), ""), *t, *n; |
|
|
811 int i, j, k; |
|
1884
|
812 |
|
|
813 if (! xml || ! xml->name) return realloc(s, len + 1); |
|
2122
|
814 while (root->xml.parent) root = (ezxml_root_t)root->xml.parent; // root tag |
|
1884
|
815 |
|
2122
|
816 for (i = 0; ! p && root->pi[i]; i++) { // pre-root processing instructions |
|
|
817 for (k = 2; root->pi[i][k - 1]; k++); |
|
|
818 for (j = 1; (n = root->pi[i][j]); j++) { |
|
|
819 if (root->pi[i][k][j - 1] == '>') continue; // not pre-root |
|
|
820 while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max) |
|
|
821 s = realloc(s, max += EZXML_BUFSIZE); |
|
|
822 len += sprintf(s + len, "<?%s%s%s?>\n", t, *n ? " " : "", n); |
|
|
823 } |
|
|
824 } |
|
|
825 |
|
|
826 xml->parent = xml->ordered = NULL; |
|
|
827 s = ezxml_toxml_r(xml, &s, &len, &max, 0, root->attr); |
|
1884
|
828 xml->parent = p; |
|
2122
|
829 xml->ordered = o; |
|
1884
|
830 |
|
2122
|
831 for (i = 0; ! p && root->pi[i]; i++) { // post-root processing instructions |
|
|
832 for (k = 2; root->pi[i][k - 1]; k++); |
|
|
833 for (j = 1; (n = root->pi[i][j]); j++) { |
|
|
834 if (root->pi[i][k][j - 1] == '<') continue; // not post-root |
|
|
835 while (len + strlen(t = root->pi[i][0]) + strlen(n) + 7 > max) |
|
|
836 s = realloc(s, max += EZXML_BUFSIZE); |
|
|
837 len += sprintf(s + len, "\n<?%s%s%s?>", t, *n ? " " : "", n); |
|
|
838 } |
|
|
839 } |
|
1884
|
840 return realloc(s, len + 1); |
|
|
841 } |
|
|
842 |
|
|
843 // free the memory allocated for the ezxml structure |
|
|
844 void ezxml_free(ezxml_t xml) |
|
|
845 { |
|
2122
|
846 ezxml_root_t root = (ezxml_root_t)xml; |
|
|
847 int i, j; |
|
|
848 char **a, *s; |
|
1884
|
849 |
|
|
850 if (! xml) return; |
|
|
851 ezxml_free(xml->child); |
|
|
852 ezxml_free(xml->ordered); |
|
|
853 |
|
2122
|
854 if (! xml->parent) { // free root tag allocations |
|
|
855 for (i = 10; root->ent[i]; i += 2) // 0 - 9 are default entites (<>&"') |
|
|
856 if ((s = root->ent[i + 1]) < root->s || s > root->e) free(s); |
|
|
857 free(root->ent); // free list of general entities |
|
|
858 |
|
|
859 for (i = 0; (a = root->attr[i]); i++) { |
|
|
860 for (j = 1; a[j++]; j += 2) // free malloced attribute values |
|
|
861 if (a[j] && (a[j] < root->s || a[j] > root->e)) free(a[j]); |
|
|
862 free(a); |
|
|
863 } |
|
|
864 if (root->attr[0]) free(root->attr); // free default attribute list |
|
1884
|
865 |
|
2122
|
866 for (i = 0; root->pi[i]; i++) { |
|
|
867 for (j = 1; root->pi[i][j]; j++); |
|
|
868 free(root->pi[i][j + 1]); |
|
|
869 free(root->pi[i]); |
|
|
870 } |
|
|
871 if (root->pi[0]) free(root->pi); // free processing instructions |
|
|
872 |
|
|
873 if (root->len == -1) free(root->m); // malloced xml data |
|
|
874 #ifndef EZXML_NOMMAP |
|
|
875 else if (root->len) munmap(root->m, root->len); // mem mapped xml data |
|
|
876 #endif // EZXML_NOMMAP |
|
|
877 if (root->u) free(root->u); // utf8 conversion |
|
|
878 } |
|
|
879 |
|
|
880 ezxml_free_attr(xml->attr); // tag attributes |
|
|
881 if ((xml->flags & EZXML_TXTM)) free(xml->txt); // character content |
|
|
882 if ((xml->flags & EZXML_NAMEM)) free(xml->name); // tag name |
|
|
883 free(xml); |
|
1884
|
884 } |
|
|
885 |
|
|
886 // return parser error message or empty string if none |
|
|
887 const char *ezxml_error(ezxml_t xml) |
|
|
888 { |
|
2122
|
889 while (xml && xml->parent) xml = xml->parent; // find root tag |
|
|
890 return (xml) ? ((ezxml_root_t)xml)->err : ""; |
|
|
891 } |
|
|
892 |
|
|
893 // returns a new empty ezxml structure with the given root tag name |
|
|
894 ezxml_t ezxml_new(const char *name) |
|
|
895 { |
|
|
896 static char *ent[] = { "lt;", "<", "gt;", ">", "quot;", """, |
|
|
897 "apos;", "'", "amp;", "&", NULL }; |
|
|
898 ezxml_root_t root = (ezxml_root_t)memset(malloc(sizeof(struct ezxml_root)), |
|
|
899 '\0', sizeof(struct ezxml_root)); |
|
|
900 root->xml.name = (char *)name; |
|
|
901 root->cur = &root->xml; |
|
|
902 strcpy(root->err, root->xml.txt = ""); |
|
|
903 root->ent = memcpy(malloc(sizeof(ent)), ent, sizeof(ent)); |
|
|
904 root->attr = root->pi = (char ***)(root->xml.attr = EZXML_NIL); |
|
|
905 return &root->xml; |
|
|
906 } |
|
|
907 |
|
|
908 // Adds a child tag. off is the offset of the child tag relative to the start |
|
|
909 // of the parent tag's character content. returns the child tag |
|
|
910 ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t off) |
|
|
911 { |
|
|
912 ezxml_t cur, head, child; |
|
|
913 |
|
|
914 if (! xml) return NULL; |
|
|
915 child = (ezxml_t)memset(malloc(sizeof(struct ezxml)), '\0', |
|
|
916 sizeof(struct ezxml)); |
|
|
917 child->name = (char *)name; |
|
|
918 child->attr = EZXML_NIL; |
|
|
919 child->off = off; |
|
|
920 child->parent = xml; |
|
|
921 child->txt = ""; |
|
|
922 |
|
|
923 if ((head = xml->child)) { // already have sub tags |
|
|
924 if (head->off <= off) { // not first subtag |
|
|
925 for (cur = head; cur->ordered && cur->ordered->off <= off; |
|
|
926 cur = cur->ordered); |
|
|
927 child->ordered = cur->ordered; |
|
|
928 cur->ordered = child; |
|
|
929 } |
|
|
930 else { // first subtag |
|
|
931 child->ordered = head; |
|
|
932 xml->child = child; |
|
|
933 } |
|
|
934 |
|
|
935 for (cur = head; cur->sibling && strcmp(cur->name, name); |
|
|
936 cur = cur->sibling); // find tag type |
|
|
937 if (! strcmp(cur->name, name) && cur->off <= off) { //not first of type |
|
|
938 while (cur->next && cur->next->off <= off) cur = cur->next; |
|
|
939 child->next = cur->next; |
|
|
940 cur->next = child; |
|
|
941 } |
|
|
942 else { // first tag of this type |
|
|
943 if (cur->off > off) child->next = cur; // not only tag of this type |
|
|
944 for (cur = head; cur->sibling && cur->sibling->off <= off; |
|
|
945 cur = cur->sibling); |
|
|
946 child->sibling = cur->sibling; |
|
|
947 cur->sibling = child; |
|
|
948 } |
|
|
949 } |
|
|
950 else xml->child = child; // only sub tag |
|
|
951 |
|
|
952 return child; |
|
|
953 } |
|
|
954 |
|
|
955 // sets the character content for the given tag and returns the tag |
|
|
956 ezxml_t ezxml_set_txt(ezxml_t xml, const char *txt) |
|
|
957 { |
|
|
958 if (! xml) return NULL; |
|
|
959 if (xml->flags & EZXML_TXTM) free(xml->txt); // existing txt was malloced |
|
|
960 xml->flags &= ~EZXML_TXTM; |
|
|
961 xml->txt = (char *)txt; |
|
|
962 return xml; |
|
1884
|
963 } |
|
|
964 |
|
2122
|
965 // Sets the given tag attribute or adds a new attribute if not found. A value |
|
|
966 // of NULL will remove the specified attribute. |
|
|
967 void ezxml_set_attr(ezxml_t xml, const char *name, const char *value) |
|
|
968 { |
|
|
969 int l = 0, c; |
|
|
970 |
|
|
971 if (! xml) return; |
|
|
972 while (xml->attr[l] && strcmp(xml->attr[l], name)) l += 2; |
|
|
973 if (! xml->attr[l]) { // not found, add as new attribute |
|
|
974 if (! value) return; // nothing to do |
|
|
975 if (xml->attr == EZXML_NIL) { // first attribute |
|
|
976 xml->attr = malloc(4 * sizeof(char *)); |
|
|
977 xml->attr[1] = strdup(""); // empty list of malloced names/vals |
|
|
978 } |
|
|
979 else xml->attr = realloc(xml->attr, (l + 4) * sizeof(char *)); |
|
|
980 |
|
|
981 xml->attr[l] = (char *)name; // set attribute name |
|
|
982 xml->attr[l + 2] = NULL; // null terminate attribute list |
|
|
983 xml->attr[l + 3] = realloc(xml->attr[l + 1], |
|
|
984 (c = strlen(xml->attr[l + 1])) + 2); |
|
|
985 strcpy(xml->attr[l + 3] + c, " "); // set name/value as not malloced |
|
|
986 if (xml->flags & EZXML_DUP) xml->attr[l + 3][c] = EZXML_NAMEM; |
|
|
987 } |
|
|
988 else if (xml->flags & EZXML_DUP) free((char *)name); // name was strduped |
|
|
989 |
|
|
990 for (c = l; xml->attr[c]; c += 2); // find end of attribute list |
|
|
991 if (xml->attr[c + 1][l / 2] & EZXML_TXTM) free(xml->attr[l + 1]); //old val |
|
|
992 if (xml->flags & EZXML_DUP) xml->attr[c + 1][l / 2] |= EZXML_TXTM; |
|
|
993 else xml->attr[c + 1][l / 2] &= ~EZXML_TXTM; |
|
|
994 |
|
|
995 if (value) xml->attr[l + 1] = (char *)value; // set attribute value |
|
|
996 else { // remove attribute |
|
|
997 if (xml->attr[c + 1][l / 2] & EZXML_NAMEM) free(xml->attr[l]); |
|
|
998 memmove(xml->attr + l, xml->attr + l + 2, (c - l + 2) * sizeof(char*)); |
|
|
999 xml->attr = realloc(xml->attr, (c + 2) * sizeof(char *)); |
|
|
1000 memmove(xml->attr[c + 1] + (l / 2), xml->attr[c + 1] + (l / 2) + 1, |
|
|
1001 (c / 2) - (l / 2)); // fix list of which name/vals are malloced |
|
|
1002 } |
|
|
1003 xml->flags &= ~EZXML_DUP; // clear strdup() flag |
|
|
1004 } |
|
1884
|
1005 |
|
2122
|
1006 // sets a flag for the given tag and returns the tag |
|
|
1007 ezxml_t ezxml_set_flag(ezxml_t xml, short flag) |
|
|
1008 { |
|
|
1009 if (xml) xml->flags |= flag; |
|
|
1010 return xml; |
|
|
1011 } |
|
|
1012 |
|
|
1013 // removes a tag along with all its subtags |
|
|
1014 void ezxml_remove(ezxml_t xml) |
|
|
1015 { |
|
|
1016 ezxml_t cur; |
|
|
1017 |
|
|
1018 if (! xml) return; // nothing to do |
|
|
1019 if (xml->next) xml->next->sibling = xml->sibling; // patch sibling list |
|
|
1020 |
|
|
1021 if (xml->parent) { // not root tag |
|
|
1022 cur = xml->parent->child; // find head of subtag list |
|
|
1023 if (cur == xml) xml->parent->child = xml->ordered; // first subtag |
|
|
1024 else { // not first subtag |
|
|
1025 while (cur->ordered != xml) cur = cur->ordered; |
|
|
1026 cur->ordered = cur->ordered->ordered; // patch ordered list |
|
|
1027 |
|
|
1028 cur = xml->parent->child; // go back to head of subtag list |
|
|
1029 if (strcmp(cur->name, xml->name)) { // not in first sibling list |
|
|
1030 while (strcmp(cur->sibling->name, xml->name)) |
|
|
1031 cur = cur->sibling; |
|
|
1032 if (cur->sibling == xml) { // first of a sibling list |
|
|
1033 cur->sibling = (xml->next) ? xml->next |
|
|
1034 : cur->sibling->sibling; |
|
|
1035 } |
|
|
1036 else cur = cur->sibling; // not first of a sibling list |
|
|
1037 } |
|
|
1038 |
|
|
1039 while (cur->next && cur->next != xml) cur = cur->next; |
|
|
1040 if (cur->next) cur->next = cur->next->next; // patch next list |
|
|
1041 } |
|
|
1042 } |
|
|
1043 xml->ordered = NULL; // prevent ezxml_free() from clobbering ordered list |
|
|
1044 ezxml_free(xml); |
|
|
1045 } |
|
|
1046 |
|
|
1047 #ifdef EZXML_TEST // test harness |
|
1884
|
1048 int main(int argc, char **argv) |
|
|
1049 { |
|
|
1050 ezxml_t xml; |
|
|
1051 char *s; |
|
2122
|
1052 int i; |
|
1884
|
1053 |
|
|
1054 if (argc != 2) return fprintf(stderr, "usage: %s xmlfile\n", argv[0]); |
|
|
1055 |
|
|
1056 xml = ezxml_parse_file(argv[1]); |
|
2122
|
1057 printf("%s\n", (s = ezxml_toxml(xml))); |
|
1884
|
1058 free(s); |
|
2122
|
1059 i = fprintf(stderr, "%s", ezxml_error(xml)); |
|
1884
|
1060 ezxml_free(xml); |
|
2122
|
1061 return (i) ? 1 : 0; |
|
1884
|
1062 } |
|
2122
|
1063 #endif // EZXML_TEST |
