reactos/lib/libxml2/doc/examples/reader1.c

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