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