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Annotation of embedaddon/libxml2/doc/examples/parse2.c, revision 1.1

1.1     ! misho       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: }