kc3-lang/libxml2/doc/examples/reader1.c

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• Hash : f2497c16
  Author :
  Date : 2004-01-31T15:23:33
  

  Sat Jan 31 08:22:02 MST 2004 John Fleck <jfleck@inkstain.net
  
  
  Sat Jan 31 08:22:02 MST 2004 John Fleck <jfleck@inkstain.net
  
  	* doc/examples/reader1.c, reader2.c, reader3.c
  	* doc/examples/examples.xml
  	* doc/examples/*.html
  	add note that reader examples need libmxl2 > 2.6, rebuild
  	html - this time doing it correctly :-)
  

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• doc/examples/reader1.c

• /**
   * section: xmlReader
   * synopsis: Parse an XML file with an xmlReader
   * purpose: Demonstrate the use of xmlReaderForFile() to parse an XML file
   *          and dump the informations about the nodes found in the process.
   *          (Note that the XMLReader functions require libxml2 version later
   *          than 2.6.)
   * usage: reader1 <filename>
   * test: reader1 test2.xml > reader1.tmp ; diff reader1.tmp reader1.res ; rm reader1.tmp
   * author: Daniel Veillard
   * copy: see Copyright for the status of this software.
   */
  
  #include <stdio.h>
  #include <libxml/xmlreader.h>
  
  /**
   * 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 and print information about an XML file.
   */
  static void
  streamFile(const char *filename) {
      xmlTextReaderPtr reader;
      int ret;
  
      reader = xmlReaderForFile(filename, NULL, 0);
      if (reader != NULL) {
          ret = xmlTextReaderRead(reader);
          while (ret == 1) {
              processNode(reader);
              ret = xmlTextReaderRead(reader);
          }
          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]);
  
      /*
       * Cleanup function for the XML library.
       */
      xmlCleanupParser();
      /*
       * this is to debug memory for regression tests
       */
      xmlMemoryDump();
      return(0);
  }
  

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