| 4 |
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*/ |
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#ifndef _RAD_RANDOM_H_ |
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#define _RAD_RANDOM_H_ |
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+ |
|
| 8 |
+ |
#include <stdlib.h> |
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+ |
|
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#endif |
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#define srandom(s) srand((unsigned)(s)) |
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|
| 23 |
< |
#define frandom() (rand()*(1./RAND_MAX)) |
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> |
#define frandom() (rand()*(1./(RAND_MAX+.5))) |
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|
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#else |
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– |
#ifdef BSD |
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|
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– |
extern long random(); |
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– |
|
| 27 |
– |
#define frandom() (random()*(1./2147483648.)) |
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– |
|
| 29 |
– |
#else |
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– |
|
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– |
extern long lrand48(); |
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– |
extern double drand48(); |
| 33 |
– |
|
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#define random() lrand48() |
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#define srandom(s) srand48((long)(s)) |
| 29 |
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#define frandom() drand48() |
| 30 |
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|
| 31 |
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#endif |
| 39 |
– |
#endif |
| 32 |
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extern unsigned short *urperm; |
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extern int urmask; |
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|
| 36 |
< |
#define urand(i) ((urperm[(i)&urmask]+frandom())/(urmask+1)) |
| 36 |
> |
#define urand(i) (urmask ? (urperm[(i)&urmask]+frandom())/(urmask+1.) \ |
| 37 |
> |
: frandom()) |
| 38 |
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|
| 39 |
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extern int initurand(int size); |
| 40 |
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|
