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libxml2

    1: /**
    2:  * section: Parsing
    3:  * synopsis: Parse and validate an XML file to a tree and free the result
    4:  * purpose: Create a parser context for an XML file, then parse and validate
    5:  *          the file, creating a tree, check the validation result
    6:  *          and xmlFreeDoc() to free the resulting tree.
    7:  * usage: parse2 test2.xml
    8:  * test: parse2 test2.xml
    9:  * author: Daniel Veillard
   10:  * copy: see Copyright for the status of this software.
   11:  */
   12: 
   13: #include <stdio.h>
   14: #include <libxml/parser.h>
   15: #include <libxml/tree.h>
   16: 
   17: /**
   18:  * exampleFunc:
   19:  * @filename: a filename or an URL
   20:  *
   21:  * Parse and validate the resource and free the resulting tree
   22:  */
   23: static void
   24: exampleFunc(const char *filename) {
   25:     xmlParserCtxtPtr ctxt; /* the parser context */
   26:     xmlDocPtr doc; /* the resulting document tree */
   27: 
   28:     /* create a parser context */
   29:     ctxt = xmlNewParserCtxt();
   30:     if (ctxt == NULL) {
   31:         fprintf(stderr, "Failed to allocate parser context\n");
   32: 	return;
   33:     }
   34:     /* parse the file, activating the DTD validation option */
   35:     doc = xmlCtxtReadFile(ctxt, filename, NULL, XML_PARSE_DTDVALID);
   36:     /* check if parsing suceeded */
   37:     if (doc == NULL) {
   38:         fprintf(stderr, "Failed to parse %s\n", filename);
   39:     } else {
   40: 	/* check if validation suceeded */
   41:         if (ctxt->valid == 0)
   42: 	    fprintf(stderr, "Failed to validate %s\n", filename);
   43: 	/* free up the resulting document */
   44: 	xmlFreeDoc(doc);
   45:     }
   46:     /* free up the parser context */
   47:     xmlFreeParserCtxt(ctxt);
   48: }
   49: 
   50: int main(int argc, char **argv) {
   51:     if (argc != 2)
   52:         return(1);
   53: 
   54:     /*
   55:      * this initialize the library and check potential ABI mismatches
   56:      * between the version it was compiled for and the actual shared
   57:      * library used.
   58:      */
   59:     LIBXML_TEST_VERSION
   60: 
   61:     exampleFunc(argv[1]);
   62: 
   63:     /*
   64:      * Cleanup function for the XML library.
   65:      */
   66:     xmlCleanupParser();
   67:     /*
   68:      * this is to debug memory for regression tests
   69:      */
   70:     xmlMemoryDump();
   71:     return(0);
   72: }