gl/strdup.c

   1 /* Copyright (C) 1991, 1996, 1997, 1998, 2002, 2003, 2004, 2006, 2007 Free
   2    Software Foundation, Inc.
   3
   4    This file is part of the GNU C Library.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License along
  17    with this program; if not, write to the Free Software Foundation,
  18    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  19
  20 #ifndef _LIBC
  21 # include <config.h>
  22 #endif
  23
  24 /* Get specification.  */
  25 #include <string.h>
  26
  27 #include <stdlib.h>
  28
  29 #undef __strdup
  30 #ifdef _LIBC
  31 # undef strdup
  32 #endif
  33
  34 #ifndef weak_alias
  35 # define __strdup strdup
  36 #endif
  37
  38 /* Duplicate S, returning an identical malloc'd string.  */
  39 char *
  40 __strdup (const char *s)
  41 {
  42   size_t len = strlen (s) + 1;
  43   void *new = malloc (len);
  44
  45   if (new == NULL)
  46     return NULL;
  47
  48   return (char *) memcpy (new, s, len);
  49 }
  50 #ifdef libc_hidden_def
  51 libc_hidden_def (__strdup)
  52 #endif
  53 #ifdef weak_alias
  54 weak_alias (__strdup, strdup)
  55 #endif