1 | /* |
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2 | * documents.c: Implementation of the documents handling |
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3 | * |
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4 | * See Copyright for the status of this software. |
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5 | * |
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6 | * daniel@veillard.com |
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7 | */ |
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8 | |
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9 | #define IN_LIBXSLT |
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10 | #include "libxslt.h" |
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11 | |
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12 | #include <string.h> |
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13 | |
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14 | #include <libxml/xmlmemory.h> |
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15 | #include <libxml/tree.h> |
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16 | #include <libxml/hash.h> |
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17 | #include "xslt.h" |
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18 | #include "xsltInternals.h" |
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19 | #include "xsltutils.h" |
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20 | #include "documents.h" |
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21 | #include "transform.h" |
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22 | #include "imports.h" |
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23 | #include "keys.h" |
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24 | #include "security.h" |
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25 | |
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26 | #ifdef LIBXML_XINCLUDE_ENABLED |
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27 | #include <libxml/xinclude.h> |
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28 | #endif |
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29 | |
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30 | #define WITH_XSLT_DEBUG_DOCUMENTS |
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31 | |
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32 | #ifdef WITH_XSLT_DEBUG |
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33 | #define WITH_XSLT_DEBUG_DOCUMENTS |
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34 | #endif |
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35 | |
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36 | /************************************************************************ |
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37 | * * |
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38 | * Module interfaces * |
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39 | * * |
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40 | ************************************************************************/ |
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41 | |
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42 | /** |
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43 | * xsltNewDocument: |
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44 | * @ctxt: an XSLT transformation context (or NULL) |
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45 | * @doc: a parsed XML document |
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46 | * |
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47 | * Register a new document, apply key computations |
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48 | * |
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49 | * Returns a handler to the document |
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50 | */ |
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51 | xsltDocumentPtr |
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52 | xsltNewDocument(xsltTransformContextPtr ctxt, xmlDocPtr doc) { |
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53 | xsltDocumentPtr cur; |
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54 | |
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55 | cur = (xsltDocumentPtr) xmlMalloc(sizeof(xsltDocument)); |
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56 | if (cur == NULL) { |
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57 | xsltTransformError(ctxt, NULL, (xmlNodePtr) doc, |
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58 | "xsltNewDocument : malloc failed\n"); |
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59 | return(NULL); |
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60 | } |
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61 | memset(cur, 0, sizeof(xsltDocument)); |
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62 | cur->doc = doc; |
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63 | if (ctxt != NULL) { |
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64 | cur->next = ctxt->docList; |
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65 | ctxt->docList = cur; |
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66 | xsltInitCtxtKeys(ctxt, cur); |
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67 | } |
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68 | return(cur); |
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69 | } |
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70 | |
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71 | /** |
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72 | * xsltNewStyleDocument: |
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73 | * @style: an XSLT style sheet |
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74 | * @doc: a parsed XML document |
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75 | * |
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76 | * Register a new document, apply key computations |
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77 | * |
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78 | * Returns a handler to the document |
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79 | */ |
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80 | xsltDocumentPtr |
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81 | xsltNewStyleDocument(xsltStylesheetPtr style, xmlDocPtr doc) { |
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82 | xsltDocumentPtr cur; |
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83 | |
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84 | cur = (xsltDocumentPtr) xmlMalloc(sizeof(xsltDocument)); |
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85 | if (cur == NULL) { |
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86 | xsltTransformError(NULL, style, (xmlNodePtr) doc, |
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87 | "xsltNewStyleDocument : malloc failed\n"); |
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88 | return(NULL); |
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89 | } |
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90 | memset(cur, 0, sizeof(xsltDocument)); |
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91 | cur->doc = doc; |
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92 | if (style != NULL) { |
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93 | cur->next = style->docList; |
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94 | style->docList = cur; |
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95 | } |
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96 | return(cur); |
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97 | } |
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98 | |
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99 | /** |
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100 | * xsltFreeStyleDocuments: |
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101 | * @style: an XSLT style sheet |
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102 | * |
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103 | * Free up all the space used by the loaded documents |
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104 | */ |
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105 | void |
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106 | xsltFreeStyleDocuments(xsltStylesheetPtr style) { |
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107 | xsltDocumentPtr doc, cur; |
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108 | |
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109 | cur = style->docList; |
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110 | while (cur != NULL) { |
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111 | doc = cur; |
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112 | cur = cur->next; |
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113 | xsltFreeDocumentKeys(doc); |
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114 | if (!doc->main) |
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115 | xmlFreeDoc(doc->doc); |
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116 | xmlFree(doc); |
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117 | } |
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118 | } |
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119 | |
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120 | /** |
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121 | * xsltFreeDocuments: |
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122 | * @ctxt: an XSLT transformation context |
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123 | * |
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124 | * Free up all the space used by the loaded documents |
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125 | */ |
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126 | void |
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127 | xsltFreeDocuments(xsltTransformContextPtr ctxt) { |
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128 | xsltDocumentPtr doc, cur; |
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129 | |
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130 | cur = ctxt->docList; |
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131 | while (cur != NULL) { |
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132 | doc = cur; |
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133 | cur = cur->next; |
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134 | xsltFreeDocumentKeys(doc); |
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135 | if (!doc->main) |
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136 | xmlFreeDoc(doc->doc); |
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137 | xmlFree(doc); |
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138 | } |
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139 | cur = ctxt->styleList; |
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140 | while (cur != NULL) { |
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141 | doc = cur; |
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142 | cur = cur->next; |
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143 | xsltFreeDocumentKeys(doc); |
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144 | if (!doc->main) |
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145 | xmlFreeDoc(doc->doc); |
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146 | xmlFree(doc); |
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147 | } |
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148 | } |
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149 | |
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150 | |
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151 | /** |
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152 | * xsltLoadDocument: |
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153 | * @ctxt: an XSLT transformation context |
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154 | * @URI: the computed URI of the document |
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155 | * |
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156 | * Try to load a document (not a stylesheet) |
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157 | * within the XSLT transformation context |
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158 | * |
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159 | * Returns the new xsltDocumentPtr or NULL in case of error |
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160 | */ |
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161 | xsltDocumentPtr |
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162 | xsltLoadDocument(xsltTransformContextPtr ctxt, const xmlChar *URI) { |
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163 | xsltDocumentPtr ret; |
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164 | xmlDocPtr doc; |
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165 | |
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166 | if ((ctxt == NULL) || (URI == NULL)) |
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167 | return(NULL); |
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168 | |
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169 | /* |
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170 | * Security framework check |
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171 | */ |
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172 | if (ctxt->sec != NULL) { |
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173 | int res; |
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174 | |
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175 | res = xsltCheckRead(ctxt->sec, ctxt, URI); |
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176 | if (res == 0) { |
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177 | xsltTransformError(ctxt, NULL, NULL, |
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178 | "xsltLoadDocument: read rights for %s denied\n", |
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179 | URI); |
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180 | return(NULL); |
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181 | } |
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182 | } |
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183 | |
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184 | /* |
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185 | * Walk the context list to find the document if preparsed |
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186 | */ |
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187 | ret = ctxt->docList; |
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188 | while (ret != NULL) { |
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189 | if ((ret->doc != NULL) && (ret->doc->URL != NULL) && |
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190 | (xmlStrEqual(ret->doc->URL, URI))) |
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191 | return(ret); |
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192 | ret = ret->next; |
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193 | } |
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194 | |
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195 | doc = xmlParseFile((const char *) URI); |
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196 | if (doc == NULL) |
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197 | return(NULL); |
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198 | |
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199 | if (ctxt->xinclude != 0) { |
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200 | #ifdef LIBXML_XINCLUDE_ENABLED |
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201 | xmlXIncludeProcess(doc); |
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202 | #else |
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203 | xsltTransformError(ctxt, NULL, NULL, |
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204 | "xsltLoadDocument(%s) : XInclude processing not compiled in\n", |
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205 | URI); |
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206 | #endif |
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207 | } |
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208 | /* |
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209 | * Apply white-space stripping if asked for |
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210 | */ |
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211 | if (xsltNeedElemSpaceHandling(ctxt)) |
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212 | xsltApplyStripSpaces(ctxt, xmlDocGetRootElement(doc)); |
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213 | |
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214 | ret = xsltNewDocument(ctxt, doc); |
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215 | return(ret); |
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216 | } |
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217 | |
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218 | /** |
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219 | * xsltLoadStyleDocument: |
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220 | * @style: an XSLT style sheet |
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221 | * @URI: the computed URI of the document |
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222 | * |
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223 | * Try to load a stylesheet document within the XSLT transformation context |
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224 | * |
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225 | * Returns the new xsltDocumentPtr or NULL in case of error |
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226 | */ |
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227 | xsltDocumentPtr |
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228 | xsltLoadStyleDocument(xsltStylesheetPtr style, const xmlChar *URI) { |
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229 | xsltDocumentPtr ret; |
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230 | xmlDocPtr doc; |
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231 | xsltSecurityPrefsPtr sec; |
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232 | |
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233 | if ((style == NULL) || (URI == NULL)) |
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234 | return(NULL); |
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235 | |
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236 | /* |
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237 | * Security framework check |
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238 | */ |
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239 | sec = xsltGetDefaultSecurityPrefs(); |
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240 | if (sec != NULL) { |
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241 | int res; |
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242 | |
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243 | res = xsltCheckRead(sec, NULL, URI); |
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244 | if (res == 0) { |
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245 | xsltTransformError(NULL, NULL, NULL, |
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246 | "xsltLoadStyleDocument: read rights for %s denied\n", |
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247 | URI); |
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248 | return(NULL); |
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249 | } |
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250 | } |
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251 | |
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252 | /* |
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253 | * Walk the context list to find the document if preparsed |
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254 | */ |
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255 | ret = style->docList; |
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256 | while (ret != NULL) { |
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257 | if ((ret->doc != NULL) && (ret->doc->URL != NULL) && |
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258 | (xmlStrEqual(ret->doc->URL, URI))) |
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259 | return(ret); |
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260 | ret = ret->next; |
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261 | } |
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262 | |
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263 | doc = xmlParseFile((const char *) URI); |
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264 | if (doc == NULL) |
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265 | return(NULL); |
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266 | |
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267 | ret = xsltNewStyleDocument(style, doc); |
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268 | return(ret); |
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269 | } |
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270 | |
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271 | /** |
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272 | * xsltFindDocument: |
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273 | * @ctxt: an XSLT transformation context |
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274 | * @doc: a parsed XML document |
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275 | * |
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276 | * Try to find a document within the XSLT transformation context |
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277 | * |
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278 | * Returns the desired xsltDocumentPtr or NULL in case of error |
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279 | */ |
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280 | xsltDocumentPtr |
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281 | xsltFindDocument (xsltTransformContextPtr ctxt, xmlDocPtr doc) { |
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282 | xsltDocumentPtr ret; |
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283 | |
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284 | if ((ctxt == NULL) || (doc == NULL)) |
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285 | return(NULL); |
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286 | |
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287 | /* |
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288 | * Walk the context list to find the document |
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289 | */ |
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290 | ret = ctxt->docList; |
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291 | while (ret != NULL) { |
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292 | if (ret->doc == doc) |
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293 | return(ret); |
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294 | ret = ret->next; |
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295 | } |
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296 | if (doc == ctxt->style->doc) |
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297 | return(ctxt->document); |
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298 | return(NULL); |
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299 | } |
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300 | |
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