/** * 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> #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