While listening to andrew clarke Pete heard:Function args

G'day andrew

 > I thought NULL was guaranteed to be a valid pointer, no need for
 > the (void *) typecast?  It's only 0 that needs a typecast.

 ac> /*
 ac> *  stdio.h     Standard I/O functions
 ac> *
 ac> *  Copyright by WATCOM International Corp. 1988-1994.  All rights
 ac> reserved. */

 ac> ...

 ac> #ifndef NULL
 ac> #if defined(__SMALL__) || defined(__MEDIUM__) || defined(__386__)
 ac> #define NULL   0
 ac> #else
 ac> #define NULL   0L
 ac> #endif
 ac> #endif

taken from QC25 stdio.h

/***
*stdio.h - definitions/declarations for standard I/O routines
*
*       Copyright (c) 1985-1990, Microsoft Corporation.  All rights
*       reserved.
*
*Purpose:
*       This file defines the structures, values, macros, and
*       functions used by the level 2 I/O ("standard I/O") routines.
*       [ANSI/System V]
*
****/

/* define NULL pointer value */

#ifndef NULL
#if (_MSC_VER >= 600)
#define NULL    ((void *)0)
#elif (defined(M_I86SM) || defined(M_I86MM))
#define NULL    0
#else
#define NULL    0L
#endif
#endif


   -=Pete=-


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