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/* Determine the number of screen columns needed for a string.
Copyright (C) 2000-2004, 2007, 2009-2020 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <stddef.h>
/* Avoid a clash of our mbswidth() with a function of the same name defined
in UnixWare 7.1.1 <wchar.h>. We need this #include before the #define
below.
However, we don't want to #include <wchar.h> on all platforms because
- Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
<wchar.h>.
- BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
<wchar.h>. */
#if HAVE_DECL_MBSWIDTH_IN_WCHAR_H
# include <wchar.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Optional flags to influence mbswidth/mbsnwidth behavior. */
/* If this bit is set, return -1 upon finding an invalid or incomplete
character. Otherwise, assume invalid characters have width 1. */
#define MBSW_REJECT_INVALID 1
/* If this bit is set, return -1 upon finding a non-printable character.
Otherwise, assume unprintable characters have width 0 if they are
control characters and 1 otherwise. */
#define MBSW_REJECT_UNPRINTABLE 2
/* Returns the number of screen columns needed for STRING. */
#define mbswidth gnu_mbswidth /* avoid clash with UnixWare 7.1.1 function */
extern int mbswidth (const char *string, int flags);
/* Returns the number of screen columns needed for the NBYTES bytes
starting at BUF. */
extern int mbsnwidth (const char *buf, size_t nbytes, int flags);
#ifdef __cplusplus
}
#endif
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