libxml is a library for parsing XML documents. It is written in the C programming language, and provides bindings to other languages. It was originally developed for the GNOME project, but can be used outside it. The libXML code is highly portable and is released under the MIT license.
Usage examples
Sample XML document
<?xml version="1.0" encoding="UTF-8"?>
<data contents="a very simple XML sample document">
<array name="Fibonacci">
1 1 2 3 5 8 13 21 34 55 ...
</array>
<array name="Pascal">
1
1 1
1 2 1
1 3 3 1
...
</array>
</data>
Sample parser in C
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
/*
Parse a simple XML document, using libxml2
Document syntax:
<data>{<array name="[text]">[text]</array>|[text]}</data>
*/
int main( int argc, char **argv ){
xmlChar *txt;
xmlDocPtr doc;
xmlNodePtr cur, sub;
if (argc <= 1) {
printf( "Usage: %s docname\n", argv0 );
return( -1 );
}
if( !(doc = xmlParseFile( argv1 ) ) ){
fprintf( stderr, "Document not parsed successfully.\n" );
xmlFreeDoc( doc );
return( -1 );
}
if( !(cur = xmlDocGetRootElement( doc ) ) ){
fprintf( stderr, "Document has no root element.\n" );
xmlFreeDoc( doc );
return( -1 );
}
if( xmlStrcmp( cur->name, (const xmlChar *) "data" ) ){
fprintf( stderr, "Document of the wrong type, root node != data\n" );
xmlFreeDoc( doc );
return( -1 );
}
sub = cur->children;
while( sub != NULL ){
if( (!xmlStrcmp(sub->name, (const xmlChar *)"array" ) ) ){
txt = xmlGetProp( sub, (const xmlChar *)"name" );
printf( "array %s:\n", txt );
xmlFree( txt );
txt = xmlNodeListGetString( doc, sub->children, 1 );
printf( "%s\n", txt );
xmlFree( txt );
}
sub = sub->next;
}
xmlFreeDoc( doc );
return 0;
}
External links
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