/*-------------------------------------------------------------------------
 * Filename:      strdup.c
 * Version:       $Id: strdup.c,v 1.2 1999/05/02 20:26:27 erik Exp $
 * Copyright:     Copyright (C) 1996 - 1999, Erik Mouw
 * Author:        Erik Mouw <J.A.K.Mouw@its.tudelft.nl>
 * Description:   strdup() replacement function for brain damaged OSes
 * Created at:    Tue Oct  1 13:26:10 1996
 * Modified by:   Erik Mouw <J.A.K.Mouw@its.tudelft.nl>
 * Modified at:   Sun May  2 16:49:08 1999
 *-----------------------------------------------------------------------*/
/*
 * This will be compiled if your system misses the strdup() function.
 *
 *
 * strdup.c, Copyright (C) 1996 - 1999, Erik Mouw
 *
 * Email:
 *   J.A.K.Mouw@its.tudelft.nl
 *
 * Snail mail:
 *   J.A.K. Mouw
 *   Information and Communication Theory Group
 *   Department of Electrical Engineering
 *   Faculty of Information Technology and Systems
 *   Delft University of Technology
 *   P.O. Box 5031
 *   2600 GA  Delft
 *   The Netherlands
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software (the "Software"), to deal in the
 * Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute,
 * sublicense, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the
 * following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Except as contained in this notice, the name of Erik Mouw shall not
 * be used in advertising or otherwise to promote the sale, use or
 * other dealings in this Software without prior written authorization
 * from Erik Mouw.
 *
 *
 * strdup - duplicate a string
 *
 * The strdup() function returns a pointer to a new string which is a
 * duplicate of the string s. Memory for the new string is obtained
 * with malloc(3), and can be freed with free(3).
 *
 * The strdup() function returns a pointer to the duplicated string,
 * or NULL if insufficient memory was available.
 *  
 */

#ident "$Id: strdup.c,v 1.2 1999/05/02 20:26:27 erik Exp $"




#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#if STDC_HEADERS
# include <stdlib.h>
#else
# ifdef HAVE_MALLOC_H
#  include <malloc.h>
# else
#  ifndef NULL
#   define NULL ((void *)0)
#  endif
# endif
#endif








#ifdef __cplusplus
extern "C" char *strdup(const char *s)
#else
char *strdup(const char *s)
#endif
{
  char *newstr = NULL;
  const char *src;
  char *dest;
  int len;
  int i;

  if(s == NULL)
    {
      return(NULL);
    }

  /* determine string length */
  src = s;
  for(len = 0; *src != '\0'; src++, len++);
  /* don't forget the '\0'! */
  len++;

  /* allocate new string */
  newstr = (char*)malloc(len);
  if(newstr == NULL)
    {
      return(NULL);
    }

  src = s;
  dest = newstr;
  
  /* copy the stuff */
  for(i = 0; i < len ; i++)
    {
      *dest = *src;
      src++;
      dest++;
    }

  /* that's it */
  return(newstr);
}