#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>

#include <bsdxml.h>
#include <err.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "xml.h"

extern char *__progname;

void
xml_parse(const char *file, char *entity_path, struct parse_info *pi)
{
	char path[PATH_MAX];
	char buf[PATH_MAX];
	XML_Parser parser;
	struct stat st;
	char *s, *p;
	void *v;
	int ch;
	int fd;

	p = buf;
	strcpy(p, entity_path);
	while ((s = strsep(&p, ":")) != NULL) {
		snprintf(path, sizeof(path), "%s/%s", s, file);
		if ((fd = open(path, O_RDONLY)) > 0)
			break;
	}
	if (fd < 0)
		err(1, "open");
	bzero(&st, sizeof(st));
	if (fstat(fd, &st) < 0)
		err(1, "fstat");
	v = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
	if (v == MAP_FAILED)
		err(1, "mmap");
	parser = XML_ParserCreate(NULL);
	XML_SetUserData(parser, pi);
	XML_SetStartElementHandler(parser, pi->pi_start_element);
	XML_SetEndElementHandler(parser, pi->pi_end_element);
	XML_SetCharacterDataHandler(parser, pi->pi_characters);
	XML_Parse(parser, v, st.st_size, 1);
	if (munmap(v, st.st_size) < 0)
		err(1, "munmap");
	close(fd);
}