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d0ca3503 CR |
1 | /* mbscasecmp - case-insensitive multibyte string comparison. */ |
2 | ||
690150f9 | 3 | /* Copyright (C) 2009-2015 Free Software Foundation, Inc. |
d0ca3503 CR |
4 | |
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
7 | Bash is free software: you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | Bash is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | ||
23 | #if !defined (HAVE_MBSCASECMP) && defined (HANDLE_MULTIBYTE) | |
24 | ||
25 | #include <stdlib.h> | |
26 | #include <stddef.h> | |
27 | #include <string.h> | |
28 | ||
29 | #include <wchar.h> | |
30 | #include <wctype.h> | |
31 | ||
32 | /* Compare MBS1 and MBS2 without regard to case. */ | |
33 | int | |
34 | mbscasecmp (mbs1, mbs2) | |
35 | const char *mbs1; | |
36 | const char *mbs2; | |
37 | { | |
3bf257a5 | 38 | int len1, len2, mb_cur_max; |
d0ca3503 CR |
39 | wchar_t c1, c2, l1, l2; |
40 | ||
41 | len1 = len2 = 0; | |
42 | /* Reset multibyte characters to their initial state. */ | |
43 | (void) mblen ((char *) NULL, 0); | |
44 | ||
3bf257a5 | 45 | mb_cur_max = MB_CUR_MAX; |
d0ca3503 CR |
46 | do |
47 | { | |
3bf257a5 CR |
48 | len1 = mbtowc (&c1, mbs1, mb_cur_max); |
49 | len2 = mbtowc (&c2, mbs2, mb_cur_max); | |
d0ca3503 CR |
50 | |
51 | if (len1 == 0) | |
52 | return len2 == 0 ? 0 : -1; | |
53 | else if (len2 == 0) | |
54 | return 1; | |
55 | else if (len1 > 0 && len2 < 0) | |
56 | return -1; | |
57 | else if (len1 < 0 && len2 > 0) | |
58 | return 1; | |
59 | else if (len1 < 0 && len2 < 0) | |
60 | { | |
61 | len1 = strlen (mbs1); | |
62 | len2 = strlen (mbs2); | |
63 | return (len1 == len2 ? memcmp (mbs1, mbs2, len1) | |
64 | : ((len1 < len2) ? (memcmp (mbs1, mbs2, len1) > 0 ? 1 : -1) | |
65 | : (memcmp (mbs1, mbs2, len2) >= 0 ? 1 : -1))); | |
66 | } | |
67 | ||
68 | l1 = towlower (c1); | |
69 | l2 = towlower (c2); | |
70 | ||
71 | mbs1 += len1; | |
72 | mbs2 += len2; | |
73 | } | |
74 | while (l1 == l2); | |
75 | ||
76 | return l1 - l2; | |
77 | } | |
78 | ||
79 | #endif |