/* strdup.c -- return a newly allocated copy of a string   Copyright (C) 1990 Free Software Foundation, Inc.   This program is free software; you can redistribute it and/or modify   it under the terms of the GNU General Public License as published by   the Free Software Foundation; either version 2, or (at your option)   any later version.   This program is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   GNU General Public License for more details.   You should have received a copy of the GNU General Public License   along with this program; if not, write to the Free Software   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */#ifdef HAVE_CONFIG_H#include <config.h>#endif#ifdef STDC_HEADERS#include <string.h>#include <stdlib.h>#elsechar *malloc ();char *strcpy ();#endif/* Return a newly allocated copy of STR,   or 0 if out of memory. */char *strdup (str)     const char *str;{  char *newstr;  newstr = (char *) malloc (strlen (str) + 1);  if (newstr)    strcpy (newstr, str);  return newstr;}