projects / apt-legacy.git / blame
| Commit | Line | Data |
|---|---|---|
| da6ee469 JF |
1 | // -*- mode: cpp; mode: fold -*- |
| 2 | // Description /*{{{*/ | |
| 3 | // $Id: system.h,v 1.3 1999/12/10 23:40:29 jgg Exp $ | |
| 4 | /* ###################################################################### | |
| 5 | ||
| 6 | System Header - Usefull private definitions | |
| 7 | ||
| 8 | This source is placed in the Public Domain, do with it what you will | |
| 9 | It was originally written by Brian C. White. | |
| 10 | ||
| 11 | ##################################################################### */ | |
| 12 | /*}}}*/ | |
| 13 | // Private header | |
| 14 | #ifndef SYSTEM_H | |
| 15 | #define SYSTEM_H | |
| 16 | ||
| 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))) | |
| 20 | ||
| 21 | // Min/Max functions | |
| 22 | #if !defined(MIN) | |
| 23 | #if defined(__HIGHC__) | |
| 24 | #define MIN(x,y) _min(x,y) | |
| 25 | #define MAX(x,y) _max(x,y) | |
| 26 | #endif | |
| 27 | ||
| 28 | // GNU C++ has a min/max operator <coolio> | |
| 29 | #if defined(__GNUG__) | |
| 30 | #define MIN(A,B) ((A) <? (B)) | |
| 31 | #define MAX(A,B) ((A) >? (B)) | |
| 32 | #endif | |
| 33 | ||
| 34 | /* Templates tend to mess up existing code that uses min/max because of the | |
| 35 | strict matching requirements */ | |
| 36 | #if !defined(MIN) | |
| 37 | #define MIN(A,B) ((A) < (B)?(A):(B)) | |
| 38 | #define MAX(A,B) ((A) > (B)?(A):(B)) | |
| 39 | #endif | |
| 40 | #endif | |
| 41 | ||
| 42 | /* Bound functions, bound will return the value b within the limits a-c | |
| 43 | bounv will change b so that it is within the limits of a-c. */ | |
| 44 | #define _bound(a,b,c) MIN(c,MAX(b,a)) | |
| 45 | #define _boundv(a,b,c) b = _bound(a,b,c) | |
| 46 | #define ABS(a) (((a) < (0)) ?-(a) : (a)) | |
| 47 | ||
| 48 | /* Usefull count macro, use on an array of things and it will return the | |
| 49 | number of items in the array */ | |
| 50 | #define _count(a) (sizeof(a)/sizeof(a[0])) | |
| 51 | ||
| 52 | // Flag Macros | |
| 53 | #define FLAG(f) (1L << (f)) | |
| 54 | #define SETFLAG(v,f) ((v) |= FLAG(f)) | |
| 55 | #define CLRFLAG(v,f) ((v) &=~FLAG(f)) | |
| 56 | #define CHKFLAG(v,f) ((v) & FLAG(f) ? true : false) | |
| 57 | ||
| 58 | #endif |