| 1 |
gwlarson |
2.7 |
/* Copyright (c) 1999 Silicon Graphics, Inc. */ |
| 2 |
greg |
1.1 |
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| 3 |
gregl |
2.5 |
/* SCCSid "$SunId$ SGI" */ |
| 4 |
greg |
1.1 |
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| 5 |
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/* |
| 6 |
greg |
1.4 |
* random.h - header file for random(3) and urand() function. |
| 7 |
greg |
1.1 |
* |
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* 10/1/85 |
| 9 |
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*/ |
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| 11 |
greg |
2.2 |
#ifdef MSDOS |
| 12 |
greg |
1.3 |
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| 13 |
greg |
2.3 |
#define random() ((long)rand()<<16^(long)rand()<<6^(long)rand()>>4) |
| 14 |
gwlarson |
2.7 |
#define srandom(s) srand((unsigned)(s)) |
| 15 |
greg |
2.2 |
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| 16 |
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#define frandom() (rand()*(1./32768.)) |
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| 18 |
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#else |
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#ifdef BSD |
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| 21 |
greg |
1.1 |
extern long random(); |
| 22 |
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| 23 |
greg |
2.2 |
#define frandom() (random()*(1./2147483648.)) |
| 24 |
greg |
1.3 |
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| 25 |
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#else |
| 26 |
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| 27 |
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extern long lrand48(); |
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extern double drand48(); |
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| 30 |
greg |
2.2 |
#define random() lrand48() |
| 31 |
gwlarson |
2.7 |
#define srandom(s) srand48((long)(s)) |
| 32 |
greg |
2.2 |
#define frandom() drand48() |
| 33 |
greg |
1.3 |
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| 34 |
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#endif |
| 35 |
greg |
2.2 |
#endif |
| 36 |
greg |
1.4 |
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| 37 |
greg |
2.4 |
#ifdef MC |
| 38 |
gregl |
2.5 |
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| 39 |
greg |
2.4 |
#define urand(i) frandom() |
| 40 |
gregl |
2.5 |
#define initurand(n) (n) |
| 41 |
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| 42 |
greg |
2.4 |
#else |
| 43 |
gregl |
2.5 |
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| 44 |
gregl |
2.6 |
extern unsigned short *urperm; |
| 45 |
gregl |
2.5 |
extern int urmask, initurand(); |
| 46 |
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| 47 |
greg |
2.2 |
#define urand(i) ((urperm[(i)&urmask]+frandom())/(urmask+1)) |
| 48 |
gregl |
2.5 |
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| 49 |
greg |
2.4 |
#endif |
