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libxml2

    1: /**
    2:  * section: xmlReader
    3:  * synopsis: Parse and validate an XML file with an xmlReader
    4:  * purpose: Demonstrate the use of xmlReaderForFile() to parse an XML file
    5:  *          validating the content in the process and activating options
    6:  *          like entities substitution, and DTD attributes defaulting.
    7:  *          (Note that the XMLReader functions require libxml2 version later
    8:  *          than 2.6.)
    9:  * usage: reader2 <valid_xml_filename>
   10:  * test: reader2 test2.xml > reader1.tmp ; diff reader1.tmp reader1.res ; rm reader1.tmp
   11:  * author: Daniel Veillard
   12:  * copy: see Copyright for the status of this software.
   13:  */
   14: 
   15: #include <stdio.h>
   16: #include <libxml/xmlreader.h>
   17: 
   18: #ifdef LIBXML_READER_ENABLED
   19: 
   20: /**
   21:  * processNode:
   22:  * @reader: the xmlReader
   23:  *
   24:  * Dump information about the current node
   25:  */
   26: static void
   27: processNode(xmlTextReaderPtr reader) {
   28:     const xmlChar *name, *value;
   29: 
   30:     name = xmlTextReaderConstName(reader);
   31:     if (name == NULL)
   32: 	name = BAD_CAST "--";
   33: 
   34:     value = xmlTextReaderConstValue(reader);
   35: 
   36:     printf("%d %d %s %d %d", 
   37: 	    xmlTextReaderDepth(reader),
   38: 	    xmlTextReaderNodeType(reader),
   39: 	    name,
   40: 	    xmlTextReaderIsEmptyElement(reader),
   41: 	    xmlTextReaderHasValue(reader));
   42:     if (value == NULL)
   43: 	printf("\n");
   44:     else {
   45:         if (xmlStrlen(value) > 40)
   46:             printf(" %.40s...\n", value);
   47:         else
   48: 	    printf(" %s\n", value);
   49:     }
   50: }
   51: 
   52: /**
   53:  * streamFile:
   54:  * @filename: the file name to parse
   55:  *
   56:  * Parse, validate and print information about an XML file.
   57:  */
   58: static void
   59: streamFile(const char *filename) {
   60:     xmlTextReaderPtr reader;
   61:     int ret;
   62: 
   63: 
   64:     /*
   65:      * Pass some special parsing options to activate DTD attribute defaulting,
   66:      * entities substitution and DTD validation
   67:      */
   68:     reader = xmlReaderForFile(filename, NULL,
   69:                  XML_PARSE_DTDATTR |  /* default DTD attributes */
   70: 		 XML_PARSE_NOENT |    /* substitute entities */
   71: 		 XML_PARSE_DTDVALID); /* validate with the DTD */
   72:     if (reader != NULL) {
   73:         ret = xmlTextReaderRead(reader);
   74:         while (ret == 1) {
   75:             processNode(reader);
   76:             ret = xmlTextReaderRead(reader);
   77:         }
   78: 	/*
   79: 	 * Once the document has been fully parsed check the validation results
   80: 	 */
   81: 	if (xmlTextReaderIsValid(reader) != 1) {
   82: 	    fprintf(stderr, "Document %s does not validate\n", filename);
   83: 	}
   84:         xmlFreeTextReader(reader);
   85:         if (ret != 0) {
   86:             fprintf(stderr, "%s : failed to parse\n", filename);
   87:         }
   88:     } else {
   89:         fprintf(stderr, "Unable to open %s\n", filename);
   90:     }
   91: }
   92: 
   93: int main(int argc, char **argv) {
   94:     if (argc != 2)
   95:         return(1);
   96: 
   97:     /*
   98:      * this initialize the library and check potential ABI mismatches
   99:      * between the version it was compiled for and the actual shared
  100:      * library used.
  101:      */
  102:     LIBXML_TEST_VERSION
  103: 
  104:     streamFile(argv[1]);
  105: 
  106:     /*
  107:      * Cleanup function for the XML library.
  108:      */
  109:     xmlCleanupParser();
  110:     /*
  111:      * this is to debug memory for regression tests
  112:      */
  113:     xmlMemoryDump();
  114:     return(0);
  115: }
  116: 
  117: #else
  118: int main(void) {
  119:     fprintf(stderr, "XInclude support not compiled in\n");
  120:     exit(1);
  121: }
  122: #endif