How to get attributes from a node in libxml2

Question

I am working on a parser to get data from an XML file. I am using libxml2 to extract data. I am a not able to get the attributes from nodes. I only found nb_attributes

Answer 1

If you use SAX method startElementNs(...), this function is what you are looking for:

xmlChar *getAttributeValue(char *name, const xmlChar ** attributes,
           int nb_attributes)
{
int i;
const int fields = 5;    /* (localname/prefix/URI/value/end) */
xmlChar *value;
size_t size;
for (i = 0; i < nb_attributes; i++) {
    const xmlChar *localname = attributes[i * fields + 0];
    const xmlChar *prefix = attributes[i * fields + 1];
    const xmlChar *URI = attributes[i * fields + 2];
    const xmlChar *value_start = attributes[i * fields + 3];
    const xmlChar *value_end = attributes[i * fields + 4];
    if (strcmp((char *)localname, name))
        continue;
    size = value_end - value_start;
    value = (xmlChar *) malloc(sizeof(xmlChar) * size + 1);
    memcpy(value, value_start, size);
    value[size] = '\0';
    return value;
}
return NULL;
}

Usage:

char * value = getAttributeValue("atrName", attributes, nb_attributes);
// do your magic
free(value);