1 |
|
|
/* $OpenBSD: catgets.c,v 1.9 2015/09/05 11:25:30 guenther Exp $ */ |
2 |
|
|
/*- |
3 |
|
|
* Copyright (c) 1996 The NetBSD Foundation, Inc. |
4 |
|
|
* All rights reserved. |
5 |
|
|
* |
6 |
|
|
* This code is derived from software contributed to The NetBSD Foundation |
7 |
|
|
* by J.T. Conklin. |
8 |
|
|
* |
9 |
|
|
* Redistribution and use in source and binary forms, with or without |
10 |
|
|
* modification, are permitted provided that the following conditions |
11 |
|
|
* are met: |
12 |
|
|
* 1. Redistributions of source code must retain the above copyright |
13 |
|
|
* notice, this list of conditions and the following disclaimer. |
14 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
15 |
|
|
* notice, this list of conditions and the following disclaimer in the |
16 |
|
|
* documentation and/or other materials provided with the distribution. |
17 |
|
|
* |
18 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
19 |
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
20 |
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
21 |
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE |
22 |
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
23 |
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
24 |
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
25 |
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
26 |
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
27 |
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
28 |
|
|
* POSSIBILITY OF SUCH DAMAGE. |
29 |
|
|
*/ |
30 |
|
|
|
31 |
|
|
#define _NLS_PRIVATE |
32 |
|
|
|
33 |
|
|
#include <errno.h> |
34 |
|
|
#include <stdlib.h> |
35 |
|
|
#include <string.h> |
36 |
|
|
#include <nl_types.h> |
37 |
|
|
|
38 |
|
|
char * |
39 |
|
|
catgets(nl_catd catd, int set_id, int msg_id, const char *s) |
40 |
|
|
{ |
41 |
|
|
struct _nls_cat_hdr *cat_hdr; |
42 |
|
|
struct _nls_set_hdr *set_hdr; |
43 |
|
|
struct _nls_msg_hdr *msg_hdr; |
44 |
|
|
int l, u, i, r; |
45 |
|
|
|
46 |
|
|
if (catd == (nl_catd) -1) { |
47 |
|
|
errno = EBADF; |
48 |
|
|
return (char *) s; |
49 |
|
|
} |
50 |
|
|
|
51 |
|
|
cat_hdr = (struct _nls_cat_hdr *) catd->__data; |
52 |
|
|
set_hdr = (struct _nls_set_hdr *) ((char *)catd->__data |
53 |
|
|
+ sizeof(struct _nls_cat_hdr)); |
54 |
|
|
|
55 |
|
|
/* binary search, see knuth algorithm b */ |
56 |
|
|
l = 0; |
57 |
|
|
u = ntohl(cat_hdr->__nsets) - 1; |
58 |
|
|
while (l <= u) { |
59 |
|
|
i = (l + u) / 2; |
60 |
|
|
r = set_id - ntohl(set_hdr[i].__setno); |
61 |
|
|
|
62 |
|
|
if (r == 0) { |
63 |
|
|
msg_hdr = (struct _nls_msg_hdr *) ((char *)catd->__data |
64 |
|
|
+ sizeof(struct _nls_cat_hdr) |
65 |
|
|
+ ntohl(cat_hdr->__msg_hdr_offset)); |
66 |
|
|
|
67 |
|
|
l = ntohl(set_hdr[i].__index); |
68 |
|
|
u = l + ntohl(set_hdr[i].__nmsgs) - 1; |
69 |
|
|
while (l <= u) { |
70 |
|
|
i = (l + u) / 2; |
71 |
|
|
r = msg_id - ntohl(msg_hdr[i].__msgno); |
72 |
|
|
if (r == 0) { |
73 |
|
|
return (char *) catd->__data |
74 |
|
|
+ sizeof(struct _nls_cat_hdr) |
75 |
|
|
+ ntohl(cat_hdr->__msg_txt_offset) |
76 |
|
|
+ ntohl(msg_hdr[i].__offset); |
77 |
|
|
} else if (r < 0) { |
78 |
|
|
u = i - 1; |
79 |
|
|
} else { |
80 |
|
|
l = i + 1; |
81 |
|
|
} |
82 |
|
|
} |
83 |
|
|
|
84 |
|
|
/* not found */ |
85 |
|
|
return (char *) s; |
86 |
|
|
|
87 |
|
|
} else if (r < 0) { |
88 |
|
|
u = i - 1; |
89 |
|
|
} else { |
90 |
|
|
l = i + 1; |
91 |
|
|
} |
92 |
|
|
} |
93 |
|
|
|
94 |
|
|
/* not found */ |
95 |
|
|
return (char *) s; |
96 |
|
|
} |
97 |
|
|
DEF_WEAK(catgets); |