strdup.c

   1 /* Copyright (C) 1991, 1996, 1997, 1998, 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License along
  15    with this program; if not, write to the Free Software Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 #ifdef HAVE_CONFIG_H
  19 #include <config.h>
  20 #endif
  21
  22 #if defined _LIBC || defined  STDC_HEADERS
  23 # include <stdlib.h>
  24 # include <string.h>
  25 #else
  26 char *malloc ();
  27 char *memcpy ();
  28 #endif
  29
  30 #undef __strdup
  31 #undef strdup
  32
  33 #ifndef weak_alias
  34 # define __strdup strdup
  35 #endif
  36
  37 /* Duplicate S, returning an identical malloc'd string.  */
  38 char *
  39 __strdup (const char *s)
  40 {
  41   size_t len = strlen (s) + 1;
  42   void *new = malloc (len);
  43
  44   if (new == NULL)
  45     return NULL;
  46
  47   return (char *) memcpy (new, s, len);
  48 }
  49 #ifdef libc_hidden_def
  50 libc_hidden_def (__strdup)
  51 #endif
  52 #ifdef weak_alias
  53 weak_alias (__strdup, strdup)
  54 #endif