lib/sh/wcswidth.c

   1 /* wcswidth.c - compute display width of wide character string */
   2
   3 /* Copyright (C) 2010 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bash, the Bourne Again SHell.
   6
   7    Bash is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    Bash is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with Bash.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include <config.h>
  22
  23 #if defined (HANDLE_MULTIBYTE) && !defined (HAVE_WCSWIDTH)
  24
  25 #include <stdc.h>
  26 #include <wchar.h>
  27 #include <bashansi.h>
  28
  29 int
  30 wcswidth(pwcs, n)
  31      const wchar_t *pwcs;
  32      size_t n;
  33 {
  34   wchar_t wc;
  35   int len, l;
  36
  37   len = 0;
  38   while (n-- > 0 && (wc = *pwcs++) != L'\0')
  39     {
  40       if ((l = wcwidth(wc)) < 0)
  41         return (-1);
  42       len += l;
  43     }
  44   return (len);
  45 }
  46 #endif