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glibc  2.9
strdup.c
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00001 /* Copyright (C) 1991, 1996, 1997, 1998, 2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #ifdef HAVE_CONFIG_H
00020 #include <config.h>
00021 #endif
00022 
00023 #if defined _LIBC || defined  STDC_HEADERS
00024 # include <stdlib.h>
00025 # include <string.h>
00026 #else
00027 char *malloc ();
00028 char *memcpy ();
00029 #endif
00030 
00031 #undef __strdup
00032 #undef strdup
00033 
00034 #ifndef weak_alias
00035 # define __strdup strdup
00036 #endif
00037 
00038 /* Duplicate S, returning an identical malloc'd string.  */
00039 char *
00040 __strdup (const char *s)
00041 {
00042   size_t len = strlen (s) + 1;
00043   void *new = malloc (len);
00044 
00045   if (new == NULL)
00046     return NULL;
00047 
00048   return (char *) memcpy (new, s, len);
00049 }
00050 #ifdef libc_hidden_def
00051 libc_hidden_def (__strdup)
00052 #endif
00053 #ifdef weak_alias
00054 weak_alias (__strdup, strdup)
00055 #endif