1#define _BSD_SOURCE
 2#include <nl_types.h>
 3#include <endian.h>
 4#include <stdlib.h>
 5#include <stdint.h>
 6#include <errno.h>
 7
 8#define V(p) be32toh(*(uint32_t *)(p))
 9
10static int cmp(const void *a, const void *b)
11{
12	uint32_t x = V(a), y = V(b);
13	return x<y ? -1 : x>y ? 1 : 0;
14}
15
16char *catgets (nl_catd catd, int set_id, int msg_id, const char *s)
17{
18	const char *map = (const char *)catd;
19	uint32_t nsets = V(map+4);
20	const char *sets = map+20;
21	const char *msgs = map+20+V(map+12);
22	const char *strings = map+20+V(map+16);
23	uint32_t set_id_be = htobe32(set_id);
24	uint32_t msg_id_be = htobe32(msg_id);
25	const char *set = bsearch(&set_id_be, sets, nsets, 12, cmp);
26	if (!set) {
27		errno = ENOMSG;
28		return (char *)s;
29	}
30	uint32_t nmsgs = V(set+4);
31	msgs += 12*V(set+8);
32	const char *msg = bsearch(&msg_id_be, msgs, nmsgs, 12, cmp);
33	if (!msg) {
34		errno = ENOMSG;
35		return (char *)s;
36	}
37	return (char *)(strings + V(msg+8));
38}