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Example of parsing xml by evaluating xpath expression and libxml2
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| CC = gcc | |
| CLIBS = `pkg-config libxml-2.0 --cflags --libs` | |
| xpath: xpath_example.c | |
| $(CC) xpath_example.c -o xpath_example.bin $(CLIBS) | |
| clean: | |
| rm -f *.o *.bin |
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| <?xml version="1.0"?> | |
| <story> | |
| <storyinfo> | |
| <author>John Fleck</author> | |
| <datewritten>June 2, 2002</datewritten> | |
| <keyword>تخیلی</keyword> | |
| </storyinfo> | |
| <body> | |
| <headline>This is the headline</headline> | |
| <para>This is the body text.</para> | |
| </body> | |
| <storyinfo> | |
| <author>Folan Bahman</author> | |
| <datewritten>June 4, 2009</datewritten> | |
| <keyword>علمی</keyword> | |
| </storyinfo> | |
| <body> | |
| <headline>This is the headline</headline> | |
| <para>This is the body text.</para> | |
| </body> | |
| </story> | |
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| #include <libxml/parser.h> | |
| #include <libxml/xpath.h> | |
| int | |
| main( int argc, char* argv[] ) { | |
| char* docname; | |
| xmlDocPtr doc; | |
| xmlChar* xpath = (xmlChar*) "//keyword"; | |
| xmlNodeSetPtr nodeset; | |
| xmlXPathObjectPtr result; | |
| int i; | |
| xmlChar* keyword; | |
| xmlXPathContextPtr context; | |
| docname = argv[1]; | |
| doc = xmlParseFile( docname ); | |
| context = xmlXPathNewContext( doc ); | |
| result = xmlXPathEvalExpression( xpath, context ); | |
| xmlXPathFreeContext( context ); | |
| if( result ) { | |
| nodeset = result->nodesetval; | |
| for( i = 0; i < nodeset->nodeNr; i++ ) { | |
| keyword = xmlNodeListGetString( doc, nodeset->nodeTab[i]->xmlChildrenNode, 1 ); | |
| printf( "keyword: %s\n", keyword ); | |
| xmlFree( keyword ); | |
| } | |
| xmlXPathFreeObject( result ); | |
| } | |
| xmlFreeDoc( doc ); | |
| xmlCleanupParser(); | |
| return (1); | |
| } |
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