Commit | Line | Data |
---|---|---|
5df4cba6 SM |
1 | /* Dispatching based on the current locale's character encoding. |
2 | Copyright (C) 2018-2020 Free Software Foundation, Inc. | |
3 | ||
4 | This program is free software: you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 3 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ | |
16 | ||
17 | /* Written by Bruno Haible <bruno@clisp.org>, 2018. */ | |
18 | ||
19 | #include <config.h> | |
20 | ||
21 | /* Specification. */ | |
22 | #include "lc-charset-dispatch.h" | |
23 | ||
24 | #if GNULIB_defined_mbstate_t | |
25 | ||
26 | # include "localcharset.h" | |
27 | # include "streq.h" | |
28 | ||
29 | # if GNULIB_WCHAR_SINGLE | |
30 | /* When we know that the locale does not change, provide a speedup by | |
31 | caching the value of locale_encoding_classification. */ | |
32 | # define locale_encoding_classification_cached locale_encoding_classification | |
33 | # else | |
34 | /* By default, don't make assumptions, hence no caching. */ | |
35 | # define locale_encoding_classification_uncached locale_encoding_classification | |
36 | # endif | |
37 | ||
38 | # if GNULIB_WCHAR_SINGLE | |
39 | static inline | |
40 | # endif | |
41 | enc_t | |
42 | locale_encoding_classification_uncached (void) | |
43 | { | |
44 | const char *encoding = locale_charset (); | |
45 | if (STREQ_OPT (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0, 0)) | |
46 | return enc_utf8; | |
47 | if (STREQ_OPT (encoding, "EUC-JP", 'E', 'U', 'C', '-', 'J', 'P', 0, 0, 0)) | |
48 | return enc_eucjp; | |
49 | if (STREQ_OPT (encoding, "EUC-KR", 'E', 'U', 'C', '-', 'K', 'R', 0, 0, 0) | |
50 | || STREQ_OPT (encoding, "GB2312", 'G', 'B', '2', '3', '1', '2', 0, 0, 0) | |
51 | || STREQ_OPT (encoding, "BIG5", 'B', 'I', 'G', '5', 0, 0, 0, 0, 0)) | |
52 | return enc_94; | |
53 | if (STREQ_OPT (encoding, "EUC-TW", 'E', 'U', 'C', '-', 'T', 'W', 0, 0, 0)) | |
54 | return enc_euctw; | |
55 | if (STREQ_OPT (encoding, "GB18030", 'G', 'B', '1', '8', '0', '3', '0', 0, 0)) | |
56 | return enc_gb18030; | |
57 | if (STREQ_OPT (encoding, "SJIS", 'S', 'J', 'I', 'S', 0, 0, 0, 0, 0)) | |
58 | return enc_sjis; | |
59 | return enc_other; | |
60 | } | |
61 | ||
62 | # if GNULIB_WCHAR_SINGLE | |
63 | ||
64 | static int cached_locale_enc = -1; | |
65 | ||
66 | enc_t | |
67 | locale_encoding_classification_cached (void) | |
68 | { | |
69 | if (cached_locale_enc < 0) | |
70 | cached_locale_enc = locale_encoding_classification_uncached (); | |
71 | return cached_locale_enc; | |
72 | } | |
73 | ||
74 | # endif | |
75 | ||
76 | #else | |
77 | ||
78 | /* This declaration is solely to ensure that after preprocessing | |
79 | this file is never empty. */ | |
80 | typedef int dummy; | |
81 | ||
82 | #endif |