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115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/**
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* section: xmlReader
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* synopsis: Parse multiple XML files reusing an xmlReader
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* purpose: Demonstrate the use of xmlReaderForFile() and
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* xmlReaderNewFile to parse XML files while reusing the reader object
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* and parser context. (Note that the XMLReader functions require
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* libxml2 version later than 2.6.)
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* usage: reader4 <filename> [ filename ... ]
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* test: reader4 test1.xml test2.xml test3.xml > reader4.tmp && diff reader4.tmp $(srcdir)/reader4.res
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* author: Graham Bennett
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* copy: see Copyright for the status of this software.
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*/
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#include <stdio.h>
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#include <libxml/xmlreader.h>
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#ifdef LIBXML_READER_ENABLED
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static void processDoc(xmlTextReaderPtr readerPtr) {
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int ret;
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xmlDocPtr docPtr;
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const xmlChar *URL;
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ret = xmlTextReaderRead(readerPtr);
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while (ret == 1) {
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ret = xmlTextReaderRead(readerPtr);
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}
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/*
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* One can obtain the document pointer to get interesting
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* information about the document like the URL, but one must also
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* be sure to clean it up at the end (see below).
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*/
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docPtr = xmlTextReaderCurrentDoc(readerPtr);
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if (NULL == docPtr) {
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fprintf(stderr, "failed to obtain document\n");
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return;
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}
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URL = docPtr->URL;
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if (NULL == URL) {
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fprintf(stderr, "Failed to obtain URL\n");
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}
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if (ret != 0) {
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fprintf(stderr, "%s: Failed to parse\n", URL);
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return;
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}
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printf("%s: Processed ok\n", (const char *)URL);
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}
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int main(int argc, char **argv) {
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xmlTextReaderPtr readerPtr;
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int i;
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xmlDocPtr docPtr;
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if (argc < 2)
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return(1);
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/*
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* this initialises the library and check potential ABI mismatches
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* between the version it was compiled for and the actual shared
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* library used.
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*/
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LIBXML_TEST_VERSION
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/*
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* Create a new reader for the first file and process the
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* document.
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*/
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readerPtr = xmlReaderForFile(argv[1], NULL, 0);
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if (NULL == readerPtr) {
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fprintf(stderr, "%s: failed to create reader\n", argv[1]);
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return(1);
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}
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processDoc(readerPtr);
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/*
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* The reader can be reused for subsequent files.
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*/
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for (i=2; i < argc; ++i) {
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xmlReaderNewFile(readerPtr, argv[i], NULL, 0);
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if (NULL == readerPtr) {
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fprintf(stderr, "%s: failed to create reader\n", argv[i]);
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return(1);
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}
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processDoc(readerPtr);
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}
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/*
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* Since we've called xmlTextReaderCurrentDoc, we now have to
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* clean up after ourselves. We only have to do this the last
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* time, because xmlReaderNewFile calls xmlCtxtReset which takes
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* care of it.
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*/
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docPtr = xmlTextReaderCurrentDoc(readerPtr);
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if (docPtr != NULL)
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xmlFreeDoc(docPtr);
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/*
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* Clean up the reader.
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*/
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xmlFreeTextReader(readerPtr);
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return(0);
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}
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#else
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int main(void) {
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fprintf(stderr, "xmlReader support not compiled in\n");
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return(0);
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}
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#endif
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