1  /* Copyright (C) 1996-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include "wcwidth.h"
      19  
      20  /* Determine number of column positions required for first N wide
      21     characters (or fewer if S ends before this) in S.  */
      22  int
      23  wcswidth (const wchar_t *s, size_t n)
      24  {
      25    int result = 0;
      26  
      27    while (n-- > 0 && *s != L'\0')
      28      {
      29        int now = internal_wcwidth (*s);
      30        if (now == -1)
      31  	return -1;
      32        result += now;
      33        ++s;
      34      }
      35  
      36    return result;
      37  }