1 /* Determine the number of screen columns needed for a string. 2 Copyright (C) 2000-2004, 2007, 2009-2012 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 61
