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greg |
2.9 |
/* RCSid $Id$ */ |
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greg |
1.1 |
/* |
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greg |
1.4 |
* random.h - header file for random(3) and urand() function. |
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greg |
2.8 |
*/ |
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greg |
2.9 |
#include "copyright.h" |
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greg |
1.1 |
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greg |
2.8 |
#ifdef NORANDOM |
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#undef random |
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#define random() 1073741820 |
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#undef srandom |
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#define srandom(s) (s) |
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#define frandom() 0.5 |
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#define urand(i) 0.5 |
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#define initurand(n) (n) |
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#else |
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greg |
2.2 |
#ifdef MSDOS |
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greg |
1.3 |
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greg |
2.10 |
#if (RAND_MAX <= 65536) |
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greg |
2.3 |
#define random() ((long)rand()<<16^(long)rand()<<6^(long)rand()>>4) |
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greg |
2.10 |
#else |
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#define random() rand() |
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#endif |
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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)) |
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greg |
2.2 |
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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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greg |
2.2 |
#define frandom() (random()*(1./2147483648.)) |
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greg |
1.3 |
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#else |
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extern long lrand48(); |
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extern double drand48(); |
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greg |
2.2 |
#define random() lrand48() |
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gwlarson |
2.7 |
#define srandom(s) srand48((long)(s)) |
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greg |
2.2 |
#define frandom() drand48() |
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greg |
1.3 |
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#endif |
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greg |
2.2 |
#endif |
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greg |
1.4 |
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greg |
2.4 |
#ifdef MC |
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gregl |
2.5 |
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greg |
2.4 |
#define urand(i) frandom() |
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gregl |
2.5 |
#define initurand(n) (n) |
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greg |
2.4 |
#else |
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gregl |
2.5 |
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gregl |
2.6 |
extern unsigned short *urperm; |
| 58 |
greg |
2.8 |
extern int urmask; |
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gregl |
2.5 |
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greg |
2.2 |
#define urand(i) ((urperm[(i)&urmask]+frandom())/(urmask+1)) |
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greg |
2.8 |
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#endif |
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#endif |
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#ifdef NOPROTO |
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extern int initurand(); |
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extern int ilhash(); |
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extern int urind(); |
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extern void multisamp(); |
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#else |
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/* defined in urand.c */ |
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extern int initurand(int size); |
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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 */ |
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extern void multisamp(double t[], int n, double r); |
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gregl |
2.5 |
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greg |
2.4 |
#endif |
