1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/* mbschr.c - strchr(3) that handles multibyte characters. */
/* Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
#include "bashansi.h"
#include "shmbutil.h"
#undef mbschr
/* In some locales, the non-first byte of some multibyte characters have
the same value as some ascii character. Faced with these strings, a
legacy strchr() might return the wrong value. */
char *
#if defined (PROTOTYPES)
mbschr (const char *s, int c)
#else
mbschr (s, c)
const char *s;
int c;
#endif
{
#if HANDLE_MULTIBYTE
char *pos;
mbstate_t state;
size_t strlength, mblength;
/* The locale encodings with said weird property are BIG5, BIG5-HKSCS,
GBK, GB18030, SHIFT_JIS, and JOHAB. They exhibit the problem only
when c >= 0x30. We can therefore use the faster bytewise search if
c <= 0x30. */
if ((unsigned char)c >= '0' && MB_CUR_MAX > 1)
{
pos = (char *)s;
memset (&state, '\0', sizeof(mbstate_t));
strlength = strlen (s);
while (strlength > 0)
{
mblength = mbrlen (pos, strlength, &state);
if (mblength == (size_t)-2 || mblength == (size_t)-1 || mblength == (size_t)0)
mblength = 1;
if (mblength == 1 && c == (unsigned char)*pos)
return pos;
strlength -= mblength;
pos += mblength;
}
return ((char *)NULL);
}
else
#endif
return (strchr (s, c));
}
|
