third_party/libxml/src/testC14N.c

   1 /*
   2  * Canonical XML implementation test program
   3  * (http://www.w3.org/TR/2001/REC-xml-c14n-20010315)
   4  *
   5  * See Copyright for the status of this software.
   6  *
   7  * Author: Aleksey Sanin <aleksey@aleksey.com>
   8  */
   9 #include "libxml.h"
  10 #if defined(LIBXML_C14N_ENABLED) && defined(LIBXML_OUTPUT_ENABLED)
  11
  12 #include <stdio.h>
  13 #include <string.h>
  14 #ifdef HAVE_UNISTD_H
  15 #include <unistd.h>
  16 #endif
  17 #ifdef HAVE_STDLIB_H
  18 #include <stdlib.h>
  19 #endif
  20
  21 #include <libxml/xmlmemory.h>
  22 #include <libxml/parser.h>
  23 #include <libxml/xpath.h>
  24 #include <libxml/xpathInternals.h>
  25
  26 #include <libxml/c14n.h>
  27
  28
  29 static void usage(const char *name) {
  30     fprintf(stderr,
  31         "Usage: %s <mode> <xml-file> [<xpath-expr>] [<inclusive-ns-list>]\n",
  32             name);
  33     fprintf(stderr, "where <mode> is one of following:\n");
  34     fprintf(stderr,
  35         "--with-comments       \t XML file canonicalization v1.0 w comments \n");
  36     fprintf(stderr,
  37         "--without-comments    \t XML file canonicalization v1.0 w/o comments\n");
  38     fprintf(stderr,
  39         "--1-1-with-comments       \t XML file canonicalization v1.1 w comments\n");
  40     fprintf(stderr,
  41         "--1-1-without-comments    \t XML file canonicalization v1.1 w/o comments\n");
  42     fprintf(stderr,
  43     "--exc-with-comments   \t Exclusive XML file canonicalization v1.0 w comments\n");
  44     fprintf(stderr,
  45     "--exc-without-comments\t Exclusive XML file canonicalization v1.0 w/o comments\n");
  46 }
  47
  48 static xmlXPathObjectPtr
  49 load_xpath_expr (xmlDocPtr parent_doc, const char* filename);
  50
  51 static xmlChar **parse_list(xmlChar *str);
  52
  53 /* static void print_xpath_nodes(xmlNodeSetPtr nodes); */
  54
  55 static int
  56 test_c14n(const char* xml_filename, int with_comments, int mode,
  57         const char* xpath_filename, xmlChar **inclusive_namespaces) {
  58     xmlDocPtr doc;
  59     xmlXPathObjectPtr xpath = NULL;
  60     xmlChar *result = NULL;
  61     int ret;
  62
  63     /*
  64      * build an XML tree from a the file; we need to add default
  65      * attributes and resolve all character and entities references
  66      */
  67     xmlLoadExtDtdDefaultValue = XML_DETECT_IDS | XML_COMPLETE_ATTRS;
  68     xmlSubstituteEntitiesDefault(1);
  69
  70     doc = xmlReadFile(xml_filename, NULL, XML_PARSE_DTDATTR | XML_PARSE_NOENT);
  71     if (doc == NULL) {
  72         fprintf(stderr, "Error: unable to parse file \"%s\"\n", xml_filename);
  73         return(-1);
  74     }
  75
  76     /*
  77      * Check the document is of the right kind
  78      */
  79     if(xmlDocGetRootElement(doc) == NULL) {
  80         fprintf(stderr,"Error: empty document for file \"%s\"\n", xml_filename);
  81         xmlFreeDoc(doc);
  82         return(-1);
  83     }
  84
  85     /*
  86      * load xpath file if specified
  87      */
  88     if(xpath_filename) {
  89         xpath = load_xpath_expr(doc, xpath_filename);
  90         if(xpath == NULL) {
  91             fprintf(stderr,"Error: unable to evaluate xpath expression\n");
  92             xmlFreeDoc(doc);
  93             return(-1);
  94         }
  95     }
  96
  97     /*
  98      * Canonical form
  99      */
 100     /* fprintf(stderr,"File \"%s\" loaded: start canonization\n", xml_filename); */
 101     ret = xmlC14NDocDumpMemory(doc,
 102             (xpath) ? xpath->nodesetval : NULL,
 103             mode, inclusive_namespaces,
 104             with_comments, &result);
 105     if(ret >= 0) {
 106         if(result != NULL) {
 107             write(1, result, ret);
 108             xmlFree(result);
 109         }
 110     } else {
 111         fprintf(stderr,"Error: failed to canonicalize XML file \"%s\" (ret=%d)\n", xml_filename, ret);
 112         if(result != NULL) xmlFree(result);
 113         xmlFreeDoc(doc);
 114         return(-1);
 115     }
 116
 117     /*
 118      * Cleanup
 119      */
 120     if(xpath != NULL) xmlXPathFreeObject(xpath);
 121     xmlFreeDoc(doc);
 122
 123     return(ret);
 124 }
 125
 126 int main(int argc, char **argv) {
 127     int ret = -1;
 128
 129     /*
 130      * Init libxml
 131      */
 132     xmlInitParser();
 133     LIBXML_TEST_VERSION
 134
 135     /*
 136      * Parse command line and process file
 137      */
 138     if( argc < 3 ) {
 139         fprintf(stderr, "Error: wrong number of arguments.\n");
 140         usage(argv[0]);
 141     } else if(strcmp(argv[1], "--with-comments") == 0) {
 142         ret = test_c14n(argv[2], 1, XML_C14N_1_0, (argc > 3) ? argv[3] : NULL, NULL);
 143     } else if(strcmp(argv[1], "--without-comments") == 0) {
 144         ret = test_c14n(argv[2], 0, XML_C14N_1_0, (argc > 3) ? argv[3] : NULL, NULL);
 145     } else if(strcmp(argv[1], "--1-1-with-comments") == 0) {
 146         ret = test_c14n(argv[2], 1, XML_C14N_1_1, (argc > 3) ? argv[3] : NULL, NULL);
 147     } else if(strcmp(argv[1], "--1-1-without-comments") == 0) {
 148         ret = test_c14n(argv[2], 0, XML_C14N_1_1, (argc > 3) ? argv[3] : NULL, NULL);
 149     } else if(strcmp(argv[1], "--exc-with-comments") == 0) {
 150         xmlChar **list;
 151
 152         /* load exclusive namespace from command line */
 153         list = (argc > 4) ? parse_list((xmlChar *)argv[4]) : NULL;
 154         ret = test_c14n(argv[2], 1, XML_C14N_EXCLUSIVE_1_0, (argc > 3) ? argv[3] : NULL, list);
 155         if(list != NULL) xmlFree(list);
 156     } else if(strcmp(argv[1], "--exc-without-comments") == 0) {
 157         xmlChar **list;
 158
 159         /* load exclusive namespace from command line */
 160         list = (argc > 4) ? parse_list((xmlChar *)argv[4]) : NULL;
 161         ret = test_c14n(argv[2], 0, XML_C14N_EXCLUSIVE_1_0, (argc > 3) ? argv[3] : NULL, list);
 162         if(list != NULL) xmlFree(list);
 163     } else {
 164         fprintf(stderr, "Error: bad option.\n");
 165         usage(argv[0]);
 166     }
 167
 168     /*
 169      * Shutdown libxml
 170      */
 171     xmlCleanupParser();
 172     xmlMemoryDump();
 173
 174     return((ret >= 0) ? 0 : 1);
 175 }
 176
 177 /*
 178  * Macro used to grow the current buffer.
 179  */
 180 #define growBufferReentrant() {                                         \
 181     buffer_size *= 2;                                                   \
 182     buffer = (xmlChar **)                                               \
 183                 xmlRealloc(buffer, buffer_size * sizeof(xmlChar*));     \
 184     if (buffer == NULL) {                                               \
 185         perror("realloc failed");                                       \
 186         return(NULL);                                                   \
 187     }                                                                   \
 188 }
 189
 190 static xmlChar **
 191 parse_list(xmlChar *str) {
 192     xmlChar **buffer;
 193     xmlChar **out = NULL;
 194     int buffer_size = 0;
 195     int len;
 196
 197     if(str == NULL) {
 198         return(NULL);
 199     }
 200
 201     len = xmlStrlen(str);
 202     if((str[0] == '\'') && (str[len - 1] == '\'')) {
 203         str[len - 1] = '\0';
 204         str++;
 205     }
 206     /*
 207      * allocate an translation buffer.
 208      */
 209     buffer_size = 1000;
 210     buffer = (xmlChar **) xmlMalloc(buffer_size * sizeof(xmlChar*));
 211     if (buffer == NULL) {
 212         perror("malloc failed");
 213         return(NULL);
 214     }
 215     out = buffer;
 216
 217     while(*str != '\0') {
 218         if (out - buffer > buffer_size - 10) {
 219             int indx = out - buffer;
 220
 221             growBufferReentrant();
 222             out = &buffer[indx];
 223         }
 224         (*out++) = str;
 225         while(*str != ',' && *str != '\0') ++str;
 226         if(*str == ',') *(str++) = '\0';
 227     }
 228     (*out) = NULL;
 229     return buffer;
 230 }
 231
 232 static xmlXPathObjectPtr
 233 load_xpath_expr (xmlDocPtr parent_doc, const char* filename) {
 234     xmlXPathObjectPtr xpath;
 235     xmlDocPtr doc;
 236     xmlChar *expr;
 237     xmlXPathContextPtr ctx;
 238     xmlNodePtr node;
 239     xmlNsPtr ns;
 240
 241     /*
 242      * load XPath expr as a file
 243      */
 244     xmlLoadExtDtdDefaultValue = XML_DETECT_IDS | XML_COMPLETE_ATTRS;
 245     xmlSubstituteEntitiesDefault(1);
 246
 247     doc = xmlReadFile(filename, NULL, XML_PARSE_DTDATTR | XML_PARSE_NOENT);
 248     if (doc == NULL) {
 249         fprintf(stderr, "Error: unable to parse file \"%s\"\n", filename);
 250         return(NULL);
 251     }
 252
 253     /*
 254      * Check the document is of the right kind
 255      */
 256     if(xmlDocGetRootElement(doc) == NULL) {
 257         fprintf(stderr,"Error: empty document for file \"%s\"\n", filename);
 258         xmlFreeDoc(doc);
 259         return(NULL);
 260     }
 261
 262     node = doc->children;
 263     while(node != NULL && !xmlStrEqual(node->name, (const xmlChar *)"XPath")) {
 264         node = node->next;
 265     }
 266
 267     if(node == NULL) {
 268         fprintf(stderr,"Error: XPath element expected in the file  \"%s\"\n", filename);
 269         xmlFreeDoc(doc);
 270         return(NULL);
 271     }
 272
 273     expr = xmlNodeGetContent(node);
 274     if(expr == NULL) {
 275         fprintf(stderr,"Error: XPath content element is NULL \"%s\"\n", filename);
 276         xmlFreeDoc(doc);
 277         return(NULL);
 278     }
 279
 280     ctx = xmlXPathNewContext(parent_doc);
 281     if(ctx == NULL) {
 282         fprintf(stderr,"Error: unable to create new context\n");
 283         xmlFree(expr);
 284         xmlFreeDoc(doc);
 285         return(NULL);
 286     }
 287
 288     /*
 289      * Register namespaces
 290      */
 291     ns = node->nsDef;
 292     while(ns != NULL) {
 293         if(xmlXPathRegisterNs(ctx, ns->prefix, ns->href) != 0) {
 294             fprintf(stderr,"Error: unable to register NS with prefix=\"%s\" and href=\"%s\"\n", ns->prefix, ns->href);
 295             xmlFree(expr);
 296             xmlXPathFreeContext(ctx);
 297             xmlFreeDoc(doc);
 298             return(NULL);
 299         }
 300         ns = ns->next;
 301     }
 302
 303     /*
 304      * Evaluate xpath
 305      */
 306     xpath = xmlXPathEvalExpression(expr, ctx);
 307     if(xpath == NULL) {
 308         fprintf(stderr,"Error: unable to evaluate xpath expression\n");
 309         xmlFree(expr);
 310         xmlXPathFreeContext(ctx);
 311         xmlFreeDoc(doc);
 312         return(NULL);
 313     }
 314
 315     /* print_xpath_nodes(xpath->nodesetval); */
 316
 317     xmlFree(expr);
 318     xmlXPathFreeContext(ctx);
 319     xmlFreeDoc(doc);
 320     return(xpath);
 321 }
 322
 323 /*
 324 static void
 325 print_xpath_nodes(xmlNodeSetPtr nodes) {
 326     xmlNodePtr cur;
 327     int i;
 328
 329     if(nodes == NULL ){
 330         fprintf(stderr, "Error: no nodes set defined\n");
 331         return;
 332     }
 333
 334     fprintf(stderr, "Nodes Set:\n-----\n");
 335     for(i = 0; i < nodes->nodeNr; ++i) {
 336         if(nodes->nodeTab[i]->type == XML_NAMESPACE_DECL) {
 337             xmlNsPtr ns;
 338
 339             ns = (xmlNsPtr)nodes->nodeTab[i];
 340             cur = (xmlNodePtr)ns->next;
 341             fprintf(stderr, "namespace \"%s\"=\"%s\" for node %s:%s\n",
 342                     ns->prefix, ns->href,
 343                     (cur->ns) ? cur->ns->prefix : BAD_CAST "", cur->name);
 344         } else if(nodes->nodeTab[i]->type == XML_ELEMENT_NODE) {
 345             cur = nodes->nodeTab[i];
 346             fprintf(stderr, "element node \"%s:%s\"\n",
 347                     (cur->ns) ? cur->ns->prefix : BAD_CAST "", cur->name);
 348         } else {
 349             cur = nodes->nodeTab[i];
 350             fprintf(stderr, "node \"%s\": type %d\n", cur->name, cur->type);
 351         }
 352     }
 353 }
 354 */
 355
 356 #else
 357 #include <stdio.h>
 358 int main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) {
 359     printf("%s : XPath/Canonicalization and output support not compiled in\n", argv[0]);
 360     return(0);
 361 }
 362 #endif /* LIBXML_C14N_ENABLED */
 363
 364