/* Determine the number of screen columns needed for a string.

   Copyright (C) 2000-2004, 2007, 2009-2018 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