wcsmbs/mbsdup.c

   1 /* Copyright (C) 1995 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <mbstr.h>
  20 #include <stdlib.h>
  21
  22
  23 /* Duplicate MBS, returning an identical malloc'd string.  */
  24 char *
  25 mbsdup (mbs)
  26     const char *mbs;
  27 {
  28   size_t len = 0;
  29   int clen = 0;
  30   char *retval;
  31
  32   /* Reset multibyte characters to their initial state.  */
  33   (void) mblen ((char *) NULL, 0);
  34
  35   do
  36     {
  37       len += clen;
  38       clen = mblen (&mbs[len], MB_CUR_MAX);
  39     }
  40   while (clen > 0);
  41
  42   retval = (char *) malloc (len + 1);
  43   if (retval != NULL)
  44     {
  45       (void) memcpy ((void *) retval, (void *) mbs, len);
  46       retval[len] = '\0';   /* '\0' is the multibyte representation of L'\0' */
  47     }
  48
  49   return retval;
  50 }
  51