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maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
parents 10eb9086bea0
children
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1 /* Determine the number of screen columns needed for a string.
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2 Copyright (C) 2000-2004, 2007, 2009-2019 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
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17 #include <stddef.h>
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18
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19 /* Avoid a clash of our mbswidth() with a function of the same name defined
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20 in UnixWare 7.1.1 <wchar.h>. We need this #include before the #define
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21 below.
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22 However, we don't want to #include <wchar.h> on all platforms because
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23 - Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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24 <wchar.h>.
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25 - BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
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26 <wchar.h>. */
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27 #if HAVE_DECL_MBSWIDTH_IN_WCHAR_H
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28 # include <wchar.h>
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29 #endif
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30
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32 #ifdef __cplusplus
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33 extern "C" {
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34 #endif
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36
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37 /* Optional flags to influence mbswidth/mbsnwidth behavior. */
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38
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39 /* If this bit is set, return -1 upon finding an invalid or incomplete
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40 character. Otherwise, assume invalid characters have width 1. */
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41 #define MBSW_REJECT_INVALID 1
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42
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43 /* If this bit is set, return -1 upon finding a non-printable character.
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44 Otherwise, assume unprintable characters have width 0 if they are
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45 control characters and 1 otherwise. */
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46 #define MBSW_REJECT_UNPRINTABLE 2
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47
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48
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49 /* Returns the number of screen columns needed for STRING. */
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50 #define mbswidth gnu_mbswidth /* avoid clash with UnixWare 7.1.1 function */
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51 extern int mbswidth (const char *string, int flags);
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52
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53 /* Returns the number of screen columns needed for the NBYTES bytes
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54 starting at BUF. */
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55 extern int mbsnwidth (const char *buf, size_t nbytes, int flags);
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58 #ifdef __cplusplus
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59 }
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60 #endif