glibc/stdio-common/_i18n_number.h

/* Copyright (C) 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@gnu.org>, 2000.

   The GNU C Library 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.

   The GNU C Library 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 the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include "../locale/outdigits.h"
#include "../locale/outdigitswc.h"

static CHAR_T *
_i18n_number_rewrite (CHAR_T *w, CHAR_T *rear_ptr)
{
  CHAR_T *src, *s;

  /* Copy existing string so that nothing gets overwritten.  */
  src = (CHAR_T *) alloca ((rear_ptr - w) * sizeof (CHAR_T));
  s = (CHAR_T *) __mempcpy (src, w,
			    (rear_ptr - w) * sizeof (CHAR_T));
  w = rear_ptr;

  /* Process all characters in the string.  */
  while (--s >= src)
    {
      if (*s >= '0' && *s <= '9')
	{
	  if (sizeof (CHAR_T) == 1)
	    w = (CHAR_T *) outdigit_value ((char *) w, *s - '0');
	  else
	    *--w = (CHAR_T) outdigitwc_value (*s - '0');
	}
      else
	*--w = *s;
    }

  return w;
}