Mercurial > hg > octave-lojdl > gnulib-hg
annotate lib/mbsinit.c @ 16358:a712776b11ce
maint: spelling fixes
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Sun, 05 Feb 2012 13:42:03 -0800 |
| parents | 8250f2777afc |
| children | e542fd46ad6f |
| rev | line source |
|---|---|
| 10892 | 1 /* Test for initial conversion state. |
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2 Copyright (C) 2008-2012 Free Software Foundation, Inc. |
| 10892 | 3 Written by Bruno Haible <bruno@clisp.org>, 2008. |
| 4 | |
| 5 This program is free software: you can redistribute it and/or modify | |
| 6 it under the terms of the GNU General Public License as published by | |
| 7 the Free Software Foundation; either version 3 of the License, or | |
| 8 (at your option) any later version. | |
| 9 | |
| 10 This program is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 GNU General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
| 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 17 | |
| 18 #include <config.h> | |
| 19 | |
| 20 /* Specification. */ | |
| 21 #include <wchar.h> | |
| 22 | |
| 10898 | 23 #include "verify.h" |
| 24 | |
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25 #if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__ |
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26 |
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27 /* On native Windows, 'mbstate_t' is defined as 'int'. */ |
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28 |
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29 int |
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30 mbsinit (const mbstate_t *ps) |
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31 { |
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32 return ps == NULL || *ps == 0; |
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33 } |
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34 |
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35 #else |
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36 |
| 10892 | 37 /* Platforms that lack mbsinit() also lack mbrlen(), mbrtowc(), mbsrtowcs() |
| 38 and wcrtomb(), wcsrtombs(). | |
| 39 We assume that | |
| 40 - sizeof (mbstate_t) >= 4, | |
| 41 - only stateless encodings are supported (such as UTF-8 and EUC-JP, but | |
| 42 not ISO-2022 variants), | |
| 43 - for each encoding, the number of bytes for a wide character is <= 4. | |
| 44 (This maximum is attained for UTF-8, GB18030, EUC-TW.) | |
| 45 We define the meaning of mbstate_t as follows: | |
| 46 - In mb -> wc direction, mbstate_t's first byte contains the number of | |
| 47 buffered bytes (in the range 0..3), followed by up to 3 buffered bytes. | |
| 48 - In wc -> mb direction, mbstate_t contains no information. In other | |
| 49 words, it is always in the initial state. */ | |
| 50 | |
| 10898 | 51 verify (sizeof (mbstate_t) >= 4); |
| 52 | |
| 10892 | 53 int |
| 54 mbsinit (const mbstate_t *ps) | |
| 55 { | |
| 56 const char *pstate = (const char *)ps; | |
| 57 | |
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58 return pstate == NULL || pstate[0] == 0; |
| 10892 | 59 } |
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60 |
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61 #endif |