#include <string.h>
#include <stdio.h>
#include <expat.h>
#include "xml.h"
#include "logging.h"

inline int
xml_check_tag(const char *found, const char *expected)
{
	return strcmp(found, expected) != 0;
}

inline void
xml_unexpected_start_tag(XML_Parser p, const char *found, const char *expected)
{
	warn("Found \"%s\" start tag where expected one of \"%s\" in map",
			found, expected);
	XML_StopParser(p, XML_FALSE);
}

inline void
xml_unexpected_end_tag(XML_Parser p, const char *found, const char *expected)
{
	warn("Found \"%s\" end tag where expected one of \"%s\" in map",
			found, expected);
	XML_StopParser(p, XML_FALSE);
}

void
xml_get_int_attr(XML_Parser p, const char **attr, const char *name,
		int *dest, int req)
{
	for (; attr[0] != NULL; attr += 2) {
		if (strcmp(attr[0], name) == 0) {
			if (sscanf(attr[1], "%d", dest) == 1) {
				return;
			} else if (req) {
				warn("Invalid \"%s\" attribute value", name);
				XML_StopParser(p, XML_FALSE);
			}
		}
	}
	if (req) {
		warn("Required attribute \"%s\" not found", name);
		XML_StopParser(p, XML_FALSE);
	}
}

void
xml_get_string_attr(XML_Parser p, const char **attr, const char *name,
		char **dest, int req)
{
	for (; attr[0] != NULL; attr += 2) {
		if (strcmp(attr[0], name) == 0) {
			*dest = strdup(attr[1]);
		}
	}
	if (req) {
		warn("Required attribute \"%s\" not found", name);
		XML_StopParser(p, XML_FALSE);
	}
}