kc3-lang/libxml2/example/reader2.c

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• Hash : d381e5de
  Author :
  Date : 2024-04-28T21:14:32
  

  doc: Move doc/examples to example
  

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• example/reader2.c

• /**
   * section: xmlReader
   * synopsis: Parse and validate an XML file with an xmlReader
   * purpose: Demonstrate the use of xmlReaderForFile() to parse an XML file
   *          validating the content in the process and activating options
   *          like entities substitution, and DTD attributes defaulting.
   *          (Note that the XMLReader functions require libxml2 version later
   *          than 2.6.)
   * usage: reader2 <valid_xml_filename>
   * test: reader2 test2.xml > reader1.tmp && diff reader1.tmp $(srcdir)/reader1.res
   * author: Daniel Veillard
   * copy: see Copyright for the status of this software.
   */
  
  #include <stdio.h>
  #include <libxml/xmlreader.h>
  #include <libxml/parser.h>
  
  #ifdef LIBXML_READER_ENABLED
  
  /**
   * processNode:
   * @reader: the xmlReader
   *
   * Dump information about the current node
   */
  static void
  processNode(xmlTextReaderPtr reader) {
      const xmlChar *name, *value;
  
      name = xmlTextReaderConstName(reader);
      if (name == NULL)
  	name = BAD_CAST "--";
  
      value = xmlTextReaderConstValue(reader);
  
      printf("%d %d %s %d %d", 
  	    xmlTextReaderDepth(reader),
  	    xmlTextReaderNodeType(reader),
  	    name,
  	    xmlTextReaderIsEmptyElement(reader),
  	    xmlTextReaderHasValue(reader));
      if (value == NULL)
  	printf("\n");
      else {
          if (xmlStrlen(value) > 40)
              printf(" %.40s...\n", value);
          else
  	    printf(" %s\n", value);
      }
  }
  
  /**
   * streamFile:
   * @filename: the file name to parse
   *
   * Parse, validate and print information about an XML file.
   */
  static void
  streamFile(const char *filename) {
      xmlTextReaderPtr reader;
      int ret;
  
  
      /*
       * Pass some special parsing options to activate DTD attribute defaulting,
       * entities substitution and DTD validation
       */
      reader = xmlReaderForFile(filename, NULL,
                   XML_PARSE_DTDATTR |  /* default DTD attributes */
  		 XML_PARSE_NOENT |    /* substitute entities */
  		 XML_PARSE_DTDVALID); /* validate with the DTD */
      if (reader != NULL) {
          ret = xmlTextReaderRead(reader);
          while (ret == 1) {
              processNode(reader);
              ret = xmlTextReaderRead(reader);
          }
  	/*
  	 * Once the document has been fully parsed check the validation results
  	 */
  	if (xmlTextReaderIsValid(reader) != 1) {
  	    fprintf(stderr, "Document %s does not validate\n", filename);
  	}
          xmlFreeTextReader(reader);
          if (ret != 0) {
              fprintf(stderr, "%s : failed to parse\n", filename);
          }
      } else {
          fprintf(stderr, "Unable to open %s\n", filename);
      }
  }
  
  int main(int argc, char **argv) {
      if (argc != 2)
          return(1);
  
      /*
       * this initialize the library and check potential ABI mismatches
       * between the version it was compiled for and the actual shared
       * library used.
       */
      LIBXML_TEST_VERSION
  
      streamFile(argv[1]);
  
      return(0);
  }
  
  #else
  int main(void) {
      fprintf(stderr, "XInclude support not compiled in\n");
      return(0);
  }
  #endif
  

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