library/macros.h
/*
* $Id: macros.h,v 1.22 2006-01-08 12:04:23 obarthel Exp $
*
* :ts=4
*
* Portable ISO 'C' (1994) runtime library for the Amiga computer
* Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Neither the name of Olaf Barthel nor the names of contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MACROS_H
#define _MACROS_H
/****************************************************************************/
#ifndef DOS_DOS_H
#include <dos/dos.h>
#endif /* DOS_DOS_H */
/****************************************************************************/
#define BUSY ((struct IORequest *)NULL)
#define CANNOT !
#define DO_NOTHING ((void)0)
#define NO !
#define NOT !
#define DO_NOT !
#define OK (0)
#define SAME (0)
#define SEEK_ERROR (-1)
#define ERROR (-1)
/****************************************************************************/
#define NUM_ENTRIES(t) (sizeof(t) / sizeof(t[0]))
/****************************************************************************/
#define FLAG_IS_SET(v,f) (((v) & (f)) == (f))
#define FLAG_IS_CLEAR(v,f) (((v) & (f)) == 0 )
/****************************************************************************/
#define SET_FLAG(v,f) ((void)((v) |= (f)))
#define CLEAR_FLAG(v,f) ((void)((v) &= ~(f)))
/****************************************************************************/
/* Macro to get longword-aligned stack space for a structure
Uses ANSI token catenation to form a name for the char array
based on the variable name, then creates an appropriately
typed pointer to point to the first longword boundary in the
char array allocated. */
#define D_S(type, name) \
char a_##name[sizeof(type)+3]; \
type *name = (type *)((ULONG)(a_##name+3) & ~3)
/****************************************************************************/
/* BCPL style "NULL"; this should be in <dos/dos.h>. */
#ifndef ZERO
#define ZERO ((BPTR)NULL)
#endif /* ZERO */
/****************************************************************************/
/* Special data and function attributes; for OS4 most, if not all of them
are in a file called <amiga_compiler.h> which is pulled in by the
<exec/types.h> header file. */
/****************************************************************************/
#ifndef IsMinListEmpty
#define IsMinListEmpty(ml) \
((struct MinList *)((ml)->mlh_TailPred) == (struct MinList *)(ml))
#endif
/****************************************************************************/
#ifndef AMIGA_COMPILER_H
#ifdef __SASC
#ifndef ASM
#define ASM __asm
#endif /* ASM */
#ifndef REG
#define REG(r,p) register __##r p
#endif /* REG */
#ifndef INTERRUPT
#define INTERRUPT __interrupt
#endif /* INTERRUPT */
#ifndef INLINE
#define INLINE __inline
#endif /* INLINE */
#endif /* __SASC */
#ifdef __GNUC__
#ifndef ASM
#define ASM
#endif /* ASM */
#ifndef REG
#define REG(r,p) p __asm(#r)
#endif /* REG */
#ifndef INTERRUPT
#define INTERRUPT __attribute__((__interrupt__))
#endif /* INTERRUPT */
#ifndef INLINE
#define INLINE __inline__
#endif /* INLINE */
#endif /* __GNUC__ */
#endif /* AMIGA_COMPILER_H */
/****************************************************************************/
#ifndef WEAK
#ifdef __GNUC__
#define WEAK __attribute__((weak))
#else
#define WEAK /* WEAK */
#endif /* __GNUC__ */
#endif /* WEAK */
/****************************************************************************/
#ifndef UNUSED
#ifdef __GNUC__
#define UNUSED __attribute__((unused))
#else
#define UNUSED /* UNUSED */
#endif /* __GNUC__ */
#endif /* UNUSED */
/****************************************************************************/
#ifndef NOCOMMON
#ifdef __GNUC__
#define NOCOMMON __attribute__((nocommon))
#else
#define NOCOMMON /* NOCOMMON */
#endif /* __GNUC__ */
#endif /* NOCOMMON */
/****************************************************************************/
#endif /* _MACROS_H */