/*
 * |-----------------------------------------------------------|
 * | Copyright (c) 1991, 1990 MIPS Computer Systems, Inc.      |
 * | All Rights Reserved                                       |
 * |-----------------------------------------------------------|
 * |          Restricted Rights Legend                         |
 * | Use, duplication, or disclosure by the Government is      |
 * | subject to restrictions as set forth in                   |
 * | subparagraph (c)(1)(ii) of the Rights in Technical        |
 * | Data and Computer Software Clause of DFARS 252.227-7013.  |
 * |         MIPS Computer Systems, Inc.                       |
 * |         950 DeGuigne Avenue                               |
 * |         Sunnyvale, California 94088-3650, USA             |
 * |-----------------------------------------------------------|
 */
#ident	"$Header: strdup.c,v 1.9.2.1 92/06/24 14:00:39 marker Exp $"

/*	Copyright (c) 1984 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

/*LINTLIBRARY*/
/* string duplication
   returns pointer to a new string which is the duplicate of string
   pointed to by s1
   NULL is returned if new string can't be created
*/

#include <string.h>
#ifndef NULL
#define NULL	0
#endif

#if defined(__STDC__)
extern size_t strlen(const char *);
#else
extern int strlen();
#endif
extern char *malloc();


#if defined(__STDC__)

char * strdup( char *s1)

#else

char *
strdup(s1) 

   char * s1;

#endif
{  
   char * s2;

   s2 = malloc((unsigned) strlen(s1)+1) ;
   return(s2==NULL ? NULL : strcpy(s2,s1) );
}
