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/**
* 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 reader1.res ; rm reader1.tmp
* author: Daniel Veillard
* copy: see Copyright for the status of this software.
*/
#include <stdio.h>
#include <libxml/xmlreader.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]);
/*
* Cleanup function for the XML library.
*/
xmlCleanupParser();
/*
* this is to debug memory for regression tests
*/
xmlMemoryDump();
return(0);
}
#else
int main(void) {
fprintf(stderr, "XInclude support not compiled in\n");
exit(1);
}
#endif
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