windows-server-2003/base/crts/crtw32/string/strdup.c

/***
*strdup.c - duplicate a string in malloc'd memory
*
*	Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
*
*Purpose:
*	defines _strdup() - grab new memory, and duplicate the string into it.
*
*Revision History:
*	05-31-89   JCR	C version created.
*	02-27-90   GJF	Fixed calling type, #include <cruntime.h>, fixed
*			copyright.
*	08-14-90   SBM	Removed now redundant #include <stddef.h>
*	10-02-90   GJF	New-style function declarator.
*	01-18-91   GJF	ANSI naming.
*	09-02-93   GJF	Replaced _CALLTYPE1 with __cdecl.
*
*******************************************************************************/

#include <cruntime.h>
#include <malloc.h>
#include <string.h>

/***
*char *_strdup(string) - duplicate string into malloc'd memory
*
*Purpose:
*	Allocates enough storage via malloc() for a copy of the
*	string, copies the string into the new memory, and returns
*	a pointer to it.
*
*Entry:
*	char *string - string to copy into new memory
*
*Exit:
*	returns a pointer to the newly allocated storage with the
*	string in it.
*
*	returns NULL if enough memory could not be allocated, or
*	string was NULL.
*
*Uses:
*
*Exceptions:
*
*******************************************************************************/

char * __cdecl _strdup (
	const char * string
	)
{
	char *memory;

	if (!string)
		return(NULL);

	if (memory = malloc(strlen(string) + 1))
		return(strcpy(memory,string));

	return(NULL);
}