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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: system.h,v 1.3 1999/12/10 23:40:29 jgg Exp $
/* ######################################################################
System Header - Usefull private definitions
This source is placed in the Public Domain, do with it what you will
It was originally written by Brian C. White.
##################################################################### */
/*}}}*/
// Private header
#ifndef SYSTEM_H
#define SYSTEM_H
// MIN_VAL(SINT16) will return -0x8000 and MAX_VAL(SINT16) = 0x7FFF
#define MIN_VAL(t) (((t)(-1) > 0) ? (t)( 0) : (t)(((1L<<(sizeof(t)*8-1)) )))
#define MAX_VAL(t) (((t)(-1) > 0) ? (t)(-1) : (t)(((1L<<(sizeof(t)*8-1))-1)))
// Min/Max functions
#if !defined(MIN)
#if defined(__HIGHC__)
#define MIN(x,y) _min(x,y)
#define MAX(x,y) _max(x,y)
#endif
// GNU C++ has a min/max operator <coolio>
#if defined(__GNUG__)
#define MIN(A,B) ((A) <? (B))
#define MAX(A,B) ((A) >? (B))
#endif
/* Templates tend to mess up existing code that uses min/max because of the
strict matching requirements */
#if !defined(MIN)
#define MIN(A,B) ((A) < (B)?(A):(B))
#define MAX(A,B) ((A) > (B)?(A):(B))
#endif
#endif
/* Bound functions, bound will return the value b within the limits a-c
bounv will change b so that it is within the limits of a-c. */
#define _bound(a,b,c) MIN(c,MAX(b,a))
#define _boundv(a,b,c) b = _bound(a,b,c)
#define ABS(a) (((a) < (0)) ?-(a) : (a))
/* Usefull count macro, use on an array of things and it will return the
number of items in the array */
#define _count(a) (sizeof(a)/sizeof(a[0]))
// Flag Macros
#define FLAG(f) (1L << (f))
#define SETFLAG(v,f) ((v) |= FLAG(f))
#define CLRFLAG(v,f) ((v) &=~FLAG(f))
#define CHKFLAG(v,f) ((v) & FLAG(f) ? true : false)
// some nice optional GNUC features
#if __GNUC__ >= 3
#define __must_check __attribute__ ((warn_unused_result))
#define __deprecated __attribute__ ((deprecated))
/* likely() and unlikely() can be used to mark boolean expressions
as (not) likely true which will help the compiler to optimise */
#define likely(x) __builtin_expect (!!(x), 1)
#define unlikely(x) __builtin_expect (!!(x), 0)
#else
#define __must_check /* no warn_unused_result */
#define __deprecated /* no deprecated */
#define likely(x) (x)
#define unlikely(x) (x)
#endif
// cold functions are unlikely() to be called
#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4
#define __cold __attribute__ ((__cold__))
#else
#define __cold /* no cold marker */
#endif
#ifdef __GNUG__
// Methods have a hidden this parameter that is visible to this attribute
#define __like_printf_1 __attribute__ ((format (printf, 2, 3)))
#define __like_printf_2 __attribute__ ((format (printf, 3, 4)))
#else
#define __like_printf_1
#define __like_printf_2
#endif
#endif
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