| 1 |
greg |
2.16 |
/* RCSid $Id: random.h,v 2.15 2005/06/13 20:07:56 greg Exp $ */ |
| 2 |
greg |
1.1 |
/* |
| 3 |
greg |
1.4 |
* random.h - header file for random(3) and urand() function. |
| 4 |
greg |
2.8 |
*/ |
| 5 |
schorsch |
2.12 |
#ifndef _RAD_RANDOM_H_ |
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#define _RAD_RANDOM_H_ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
| 10 |
greg |
1.1 |
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| 11 |
schorsch |
2.11 |
#ifdef _WIN32 |
| 12 |
greg |
1.3 |
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| 13 |
greg |
2.10 |
#if (RAND_MAX <= 65536) |
| 14 |
greg |
2.3 |
#define random() ((long)rand()<<16^(long)rand()<<6^(long)rand()>>4) |
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greg |
2.10 |
#else |
| 16 |
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#define random() rand() |
| 17 |
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#endif |
| 18 |
gwlarson |
2.7 |
#define srandom(s) srand((unsigned)(s)) |
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greg |
2.2 |
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greg |
2.10 |
#define frandom() (rand()*(1./RAND_MAX)) |
| 21 |
greg |
2.2 |
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| 22 |
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#else |
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#ifdef BSD |
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greg |
1.1 |
extern long random(); |
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| 27 |
greg |
2.2 |
#define frandom() (random()*(1./2147483648.)) |
| 28 |
greg |
1.3 |
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| 29 |
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#else |
| 30 |
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| 31 |
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extern long lrand48(); |
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extern double drand48(); |
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| 34 |
greg |
2.2 |
#define random() lrand48() |
| 35 |
gwlarson |
2.7 |
#define srandom(s) srand48((long)(s)) |
| 36 |
greg |
2.2 |
#define frandom() drand48() |
| 37 |
greg |
1.3 |
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| 38 |
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#endif |
| 39 |
greg |
2.2 |
#endif |
| 40 |
greg |
1.4 |
|
| 41 |
gregl |
2.6 |
extern unsigned short *urperm; |
| 42 |
greg |
2.8 |
extern int urmask; |
| 43 |
gregl |
2.5 |
|
| 44 |
greg |
2.16 |
#define urand(i) (urmask ? ((urperm[(i)&urmask]+frandom())/(urmask+1)) \ |
| 45 |
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: frandom()) |
| 46 |
greg |
2.8 |
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| 47 |
greg |
2.14 |
extern int initurand(int size); |
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| 49 |
greg |
2.8 |
/* defined in urand.c */ |
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extern int ilhash(int *d, int n); |
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/* defined in urind.c */ |
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extern int urind(int s, int i); |
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/* defined in multisamp.c */ |
| 54 |
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extern void multisamp(double t[], int n, double r); |
| 55 |
gregl |
2.5 |
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| 56 |
schorsch |
2.12 |
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| 57 |
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#ifdef __cplusplus |
| 58 |
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} |
| 59 |
greg |
2.4 |
#endif |
| 60 |
schorsch |
2.12 |
#endif /* _RAD_RANDOM_H_ */ |
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