Add nsswitch support.
[dragonfly.git] / lib / libc / nls / catgets.c
CommitLineData
9cb03a6a 1/* $NetBSD: src/lib/libc/nls/catgets.c,v 1.15 1999/08/17 04:00:51 mycroft Exp $ */
a9eca985 2/* $DragonFly: src/lib/libc/nls/catgets.c,v 1.2 2005/11/20 09:18:37 swildner Exp $ */
9cb03a6a
JS
3
4/*-
5 * Copyright (c) 1996 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by J.T. Conklin.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the NetBSD
22 * Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40#define _NLS_PRIVATE
41
42#include <sys/types.h>
a9eca985 43#include <arpa/inet.h>
9cb03a6a
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44#include <errno.h>
45#include <nl_types.h>
46#include <stdlib.h>
47#include <string.h>
48
49__weak_reference(_catgets, catgets);
50
51char *
52_catgets(nl_catd catd, int set_id, int msg_id, const char *s)
53{
54 struct _nls_cat_hdr *cat_hdr;
55 struct _nls_set_hdr *set_hdr;
56 struct _nls_msg_hdr *msg_hdr;
57 int l, u, i, r;
58
59 if (catd == (nl_catd)(-1)) {
60 errno = EBADF;
61 /* LINTED interface problem */
62 return((char *)s);
63 }
64
65 cat_hdr = (struct _nls_cat_hdr *)catd->__data;
66 set_hdr = (struct _nls_set_hdr *)(void *)((char *)catd->__data
67 + sizeof(struct _nls_cat_hdr));
68
69 /* binary search, see knuth algorithm b */
70 l = 0;
71 u = ntohl((uint32_t)cat_hdr->__nsets) - 1;
72 while (l <= u) {
73 i = (l + u) / 2;
74 r = set_id - ntohl((uint32_t)set_hdr[i].__setno);
75
76 if (r == 0) {
77 msg_hdr = (struct _nls_msg_hdr *)
78 (void *)((char *)catd->__data +
79 sizeof(struct _nls_cat_hdr) +
80 ntohl((uint32_t)cat_hdr->__msg_hdr_offset));
81
82 l = ntohl((uint32_t)set_hdr[i].__index);
83 u = l + ntohl((uint32_t)set_hdr[i].__nmsgs) - 1;
84 while (l <= u) {
85 i = (l + u) / 2;
86 r = msg_id -
87 ntohl((uint32_t)msg_hdr[i].__msgno);
88 if (r == 0) {
89 return((char *) catd->__data +
90 sizeof(struct _nls_cat_hdr) +
91 ntohl((uint32_t)
92 cat_hdr->__msg_txt_offset) +
93 ntohl((uint32_t)
94 msg_hdr[i].__offset));
95 } else if (r < 0) {
96 u = i - 1;
97 } else {
98 l = i + 1;
99 }
100 }
101
102 /* not found */
103 goto notfound;
104
105 } else if (r < 0) {
106 u = i - 1;
107 } else {
108 l = i + 1;
109 }
110 }
111
112notfound:
113 /* not found */
114 errno = ENOMSG;
115 /* LINTED interface problem */
116 return((char *)s);
117}