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📁 ..
📄 Makefile.am(3.97 KB)
📄 Makefile.in(30.58 KB)
📄 examples.xml(31.41 KB)
📄 examples.xsl(7.06 KB)
📄 index.html(32.15 KB)
📄 index.py(8.95 KB)
📄 io1.c(3.67 KB)
📄 io1.res(206 B)
📄 io2.c(1.15 KB)
📄 io2.res(43 B)
📄 parse1.c(1.27 KB)
📄 parse2.c(1.92 KB)
📄 parse3.c(1.47 KB)
📄 parse4.c(3.46 KB)
📄 reader1.c(2.47 KB)
📄 reader1.res(149 B)
📄 reader2.c(3.06 KB)
📄 reader3.c(2.88 KB)
📄 reader3.res(360 B)
📄 reader4.c(3.05 KB)
📄 reader4.res(72 B)
📄 test1.xml(7 B)
📄 test2.xml(227 B)
📄 test3.xml(833 B)
📄 testWriter.c(37.51 KB)
📄 tree1.c(2.19 KB)
📄 tree1.res(121 B)
📄 tree2.c(3.39 KB)
📄 tree2.res(453 B)
📄 tst.xml(91 B)
📄 writer.xml(544 B)
📄 xpath1.c(6.47 KB)
📄 xpath1.res(114 B)
📄 xpath2.c(5.21 KB)
📄 xpath2.res(757 B)

Editing: reader3.c

/**
 * section: xmlReader
 * synopsis: Show how to extract subdocuments with xmlReader
 * purpose: Demonstrate the use of xmlTextReaderPreservePattern() 
 *          to parse an XML file with the xmlReader while collecting
 *          only some subparts of the document.
 *          (Note that the XMLReader functions require libxml2 version later
 *          than 2.6.)
 * usage: reader3
 * test: reader3 > reader3.tmp && diff reader3.tmp $(srcdir)/reader3.res
 * author: Daniel Veillard
 * copy: see Copyright for the status of this software.
 */

#include <stdio.h>
#include <libxml/xmlreader.h>

#if defined(LIBXML_READER_ENABLED) && defined(LIBXML_PATTERN_ENABLED) && defined(LIBXML_OUTPUT_ENABLED)

/**
 * streamFile:
 * @filename: the file name to parse
 *
 * Parse and print information about an XML file.
 *
 * Returns the resulting doc with just the elements preserved.
 */
static xmlDocPtr
extractFile(const char *filename, const xmlChar *pattern) {
    xmlDocPtr doc;
    xmlTextReaderPtr reader;
    int ret;

/*
     * build an xmlReader for that file
     */
    reader = xmlReaderForFile(filename, NULL, 0);
    if (reader != NULL) {
        /*
	 * add the pattern to preserve
	 */
        if (xmlTextReaderPreservePattern(reader, pattern, NULL) < 0) {
            fprintf(stderr, "%s : failed add preserve pattern %s\n",
	            filename, (const char *) pattern);
	}
	/*
	 * Parse and traverse the tree, collecting the nodes in the process
	 */
        ret = xmlTextReaderRead(reader);
        while (ret == 1) {
            ret = xmlTextReaderRead(reader);
        }
        if (ret != 0) {
            fprintf(stderr, "%s : failed to parse\n", filename);
	    xmlFreeTextReader(reader);
	    return(NULL);
        }
	/*
	 * get the resulting nodes
	 */
	doc = xmlTextReaderCurrentDoc(reader);
	/*
	 * Free up the reader
	 */
        xmlFreeTextReader(reader);
    } else {
        fprintf(stderr, "Unable to open %s\n", filename);
	return(NULL);
    }
    return(doc);
}

int main(int argc, char **argv) {
    const char *filename = "test3.xml";
    const char *pattern = "preserved";
    xmlDocPtr doc;

if (argc == 3) {
        filename = argv[1];
	pattern = argv[2];
    }

/*
     * 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

doc = extractFile(filename, (const xmlChar *) pattern);
    if (doc != NULL) {
        /*
	 * ouptut the result.
	 */
        xmlDocDump(stdout, doc);
	/*
	 * don't forget to free up the doc
	 */
	xmlFreeDoc(doc);
    }

/*
     * Cleanup function for the XML library.
     */
    xmlCleanupParser();
    /*
     * this is to debug memory for regression tests
     */
    xmlMemoryDump();
    return(0);
}

#else
int main(void) {
    fprintf(stderr, "Reader, Pattern or output support not compiled in\n");
    exit(1);
}
#endif

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