+
−/* Determine display width of UTF-32 string.
+
−   Copyright (C) 2001-2002, 2006 Free Software Foundation, Inc.
+
−   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
−
+
−   This program is free software: you can redistribute it and/or modify it
+
−   under the terms of the GNU Lesser 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
+
−   Lesser General Public License for more details.
+
−
+
−   You should have received a copy of the GNU Lesser General Public License
+
−   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
−
+
−#include <config.h>
+
−
+
−/* Specification.  */
+
−#include "uniwidth.h"
+
−
+
−int
+
−u32_width (const uint32_t *s, size_t n, const char *encoding)
+
−{
+
−  const uint32_t *s_end = s + n;
+
−  int width = 0;
+
−
+
−  while (s < s_end)
+
−    {
+
−      ucs4_t uc = *s++;
+
−      int w;
+
−
+
−      if (uc == 0)
+
−	break; /* end of string reached */
+
−
+
−      w = uc_width (uc, encoding);
+
−      if (w >= 0) /* ignore control characters in the string */
+
−	width += w;
+
−    }
+
−
+
−  return width;
+
−}