kc3-lang/gnulib/lib/wcswidth-impl.h

• Show log

  Commit

• Hash : 15880a3d
  Author :
  Date : 2023-05-04T23:27:12
  

  c32swidth: New module.
  
  * lib/uchar.in.h (c32swidth): New declaration.
  * lib/wcswidth-impl.h: Use macros FUNC, UNIT, CHARACTER_WIDTH.
  * lib/wcswidth.c: Define FUNC, UNIT, CHARACTER_WIDTH before including
  wcswidth-impl.h.
  * lib/c32swidth.c: New file.
  * modules/c32swidth: New file.
  * m4/uchar_h.m4 (gl_UCHAR_H_REQUIRE_DEFAULTS): Initialize
  GNULIB_C32SWIDTH.
  * modules/uchar (Makefile.am): Substitute GNULIB_C32SWIDTH.
  

Download

• lib/wcswidth-impl.h

• /* Determine number of screen columns needed for a size-bounded wide string.
     Copyright (C) 1999, 2011-2023 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 1999.
  
     This file 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 2.1 of the
     License, or (at your option) any later version.
  
     This file 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 <https://www.gnu.org/licenses/>.  */
  
  int
  FUNC (const UNIT *s, size_t n)
  {
    int count = 0;
    for (; n > 0; s++, n--)
      {
        UNIT c = *s;
        if (c == (UNIT)'\0')
          break;
        {
          int width = CHARACTER_WIDTH (c);
          if (width < 0)
            goto found_nonprinting;
          if (width > INT_MAX - count)
            goto overflow;
          count += width;
        }
      }
    return count;
  
    /* The total width has become > INT_MAX.
       Continue searching for a non-printing wide character.  */
    for (; n > 0; s++, n--)
      {
        UNIT c = *s;
        if (c == (UNIT)'\0')
          break;
        {
          int width = CHARACTER_WIDTH (c);
          if (width < 0)
            goto found_nonprinting;
        }
       overflow: ;
      }
    return INT_MAX;
  
   found_nonprinting:
    return -1;
  }
  

Download