libxml2 xmlTextReaderReadAttributeValue example

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

static int check (int rc)
{
    if (rc == -1) {
        fprintf (stderr, "Error from libxml2, fix your code!\n");
        exit (1);
    }
}

void main ()
{
    // This works well:
    char *s = "<!DOCTYPE doc [<!ENTITY bar 'bar'>]><doc att='foo&bar;'/>";
    // But for the following xml, att2 does not get printed
    // char *s = "<!DOCTYPE doc [<!ENTITY bar 'bar'>]><doc att1='foo&bar;' att2='foo&bar;'/>";

    xmlTextReaderPtr xml = xmlReaderForMemory (s, strlen(s), NULL, NULL, 0);

    while (check (xmlTextReaderRead (xml))) {
        printf ("%s\n", xmlTextReaderConstName (xml));
        while (check (xmlTextReaderMoveToNextAttribute (xml))) {
            const char *attname = xmlTextReaderConstName (xml);
            while (check (xmlTextReaderReadAttributeValue (xml))) {
                printf (" - child of attribute %s with node type %d, name %s and value %s\n",
                    attname,
                    xmlTextReaderNodeType (xml),
                    xmlTextReaderConstName (xml),
                    xmlTextReaderConstValue (xml));
            }
        }
    }
}

/* Compile with gcc -o attributevalue3 attributevalue3.c `pkg-config --cflags --libs libxml-2.0` */