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annotate lib/mbswidth.h @ 3836:3add19ae3d2c

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author Jim Meyering <jim@meyering.net>
date Tue, 30 Apr 2002 09:18:24 +0000 (2002-04-30)
parents 55d1cb769050
children 55eb3920b607
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1 /* Determine the number of screen columns needed for a string.
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2 Copyright (C) 2000-2001 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 2, or (at your option)
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7 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, write to the Free Software Foundation,
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16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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17
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18 #ifndef PARAMS
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19 # if defined (__GNUC__) || __STDC__
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20 # define PARAMS(Args) Args
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21 # else
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22 # define PARAMS(Args) ()
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23 # endif
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24 #endif
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25
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26 /* Optional flags to influence mbswidth/mbsnwidth behavior. */
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27
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28 /* If this bit is set, return -1 upon finding an invalid or incomplete
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29 character. Otherwise, assume invalid characters have width 1. */
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30 #define MBSW_REJECT_INVALID 1
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31
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32 /* If this bit is set, return -1 upon finding a non-printable character.
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33 Otherwise, assume unprintable characters have width 0 if they are
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34 control characters and 1 otherwise. */
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35 #define MBSW_REJECT_UNPRINTABLE 2
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36
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37 /* Returns the number of screen columns needed for STRING. */
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38 #define mbswidth gnu_mbswidth /* avoid clash with UnixWare 7.1.1 function */
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39 extern int mbswidth PARAMS ((const char *string, int flags));
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40
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41 /* Returns the number of screen columns needed for the NBYTES bytes
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42 starting at BUF. */
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43 extern int mbsnwidth PARAMS ((const char *buf, size_t nbytes, int flags));