lib/strdup.c

   1 /* strdup.c -- return a newly allocated copy of a string
   2    Copyright (C) 1990 Free Software Foundation, Inc.
   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
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 #ifdef STDC_HEADERS
  19 #include <string.h>
  20 #include <stdlib.h>
  21 #else
  22 char *malloc ();
  23 char *strcpy ();
  24 #endif
  25
  26 #if !__STDC__
  27 #define const
  28 #endif
  29
  30 /* Return a newly allocated copy of STR,
  31    or 0 if out of memory. */
  32
  33 char *
  34 strdup (str)
  35      const char *str;
  36 {
  37   char *newstr;
  38
  39   newstr = (char *) malloc (strlen (str) + 1);
  40   if (newstr)
  41     strcpy (newstr, str);
  42   return newstr;
  43 }