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| 1 /* Determine the number of screen columns needed for a string. |
| 2 Copyright (C) 2000-2004, 2007 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 <http://www.gnu.org/licenses/>. */ |
| 16 |
| 17 #include <stddef.h> |
| 18 |
| 19 /* Avoid a clash of our mbswidth() with a function of the same name defined |
| 20 in UnixWare 7.1.1 <wchar.h>. We need this #include before the #define |
| 21 below. |
| 22 However, we don't want to #include <wchar.h> on all platforms because |
| 23 - Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before |
| 24 <wchar.h>. |
| 25 - BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before |
| 26 <wchar.h>. */ |
| 27 #if HAVE_DECL_MBSWIDTH_IN_WCHAR_H |
| 28 # include <wchar.h> |
| 29 #endif |
| 30 |
| 31 |
| 32 #ifdef __cplusplus |
| 33 extern "C" { |
| 34 #endif |
| 35 |
| 36 |
| 37 /* Optional flags to influence mbswidth/mbsnwidth behavior. */ |
| 38 |
| 39 /* If this bit is set, return -1 upon finding an invalid or incomplete |
| 40 character. Otherwise, assume invalid characters have width 1. */ |
| 41 #define MBSW_REJECT_INVALID 1 |
| 42 |
| 43 /* If this bit is set, return -1 upon finding a non-printable character. |
| 44 Otherwise, assume unprintable characters have width 0 if they are |
| 45 control characters and 1 otherwise. */ |
| 46 #define MBSW_REJECT_UNPRINTABLE 2 |
| 47 |
| 48 |
| 49 /* Returns the number of screen columns needed for STRING. */ |
| 50 #define mbswidth gnu_mbswidth /* avoid clash with UnixWare 7.1.1 function */ |
| 51 extern int mbswidth (const char *string, int flags); |
| 52 |
| 53 /* Returns the number of screen columns needed for the NBYTES bytes |
| 54 starting at BUF. */ |
| 55 extern int mbsnwidth (const char *buf, size_t nbytes, int flags); |
| 56 |
| 57 |
| 58 #ifdef __cplusplus |
| 59 } |
| 60 #endif |
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