1 // -*- mode: cpp; mode: fold -*-
3 // $Id: system.h,v 1.2 1999/01/19 04:41:43 jgg Exp $
4 /* ######################################################################
6 System Header - Usefull private definitions
8 This source is placed in the Public Domain, do with it what you will
9 It was originally written by Brian C. White.
11 ##################################################################### */
17 // MIN_VAL(SINT16) will return -0x8000 and MAX_VAL(SINT16) = 0x7FFF
18 #define MIN_VAL(t) (((t)(-1) > 0) ? (t)( 0) : (t)(((1L<<(sizeof(t)*8-1)) )))
19 #define MAX_VAL(t) (((t)(-1) > 0) ? (t)(-1) : (t)(((1L<<(sizeof(t)*8-1))-1)))
22 #if defined(__HIGHC__)
23 #define MIN(x,y) _min(x,y)
24 #define MAX(x,y) _max(x,y)
27 // GNU C++ has a min/max operator <coolio>
29 #define MIN(A,B) ((A) <? (B))
30 #define MAX(A,B) ((A) >? (B))
33 /* Templates tend to mess up existing code that uses min/max because of the
34 strict matching requirements */
36 #define MIN(A,B) ((A) < (B)?(A):(B))
37 #define MAX(A,B) ((A) > (B)?(A):(B))
40 /* Bound functions, bound will return the value b within the limits a-c
41 bounv will change b so that it is within the limits of a-c. */
42 #define _bound(a,b,c) MIN(c,MAX(b,a))
43 #define _boundv(a,b,c) b = _bound(a,b,c)
44 #define ABS(a) (((a) < (0)) ?-(a) : (a))
46 /* Usefull count macro, use on an array of things and it will return the
47 number of items in the array */
48 #define _count(a) (sizeof(a)/sizeof(a[0]))
51 #define FLAG(f) (1L << (f))
52 #define SETFLAG(v,f) ((v) |= FLAG(f))
53 #define CLRFLAG(v,f) ((v) &=~FLAG(f))
54 #define CHKFLAG(v,f) ((v) & FLAG(f) ? true : false)