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greg |
2.9 |
/* RCSid $Id$ */
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| 2 |
greg |
1.1 |
/*
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greg |
1.4 |
* random.h - header file for random(3) and urand() function.
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| 4 |
greg |
2.8 |
*/
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| 6 |
greg |
2.9 |
#include "copyright.h"
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greg |
1.1 |
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| 8 |
greg |
2.8 |
#ifdef NORANDOM
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| 10 |
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#undef random
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| 11 |
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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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| 20 |
greg |
2.2 |
#ifdef MSDOS
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| 21 |
greg |
1.3 |
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| 22 |
greg |
2.3 |
#define random() ((long)rand()<<16^(long)rand()<<6^(long)rand()>>4)
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| 23 |
gwlarson |
2.7 |
#define srandom(s) srand((unsigned)(s))
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greg |
2.2 |
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#define frandom() (rand()*(1./32768.))
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| 27 |
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#else
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#ifdef BSD
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| 30 |
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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| 39 |
greg |
2.2 |
#define random() lrand48()
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| 40 |
gwlarson |
2.7 |
#define srandom(s) srand48((long)(s))
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| 41 |
greg |
2.2 |
#define frandom() drand48()
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| 42 |
greg |
1.3 |
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#endif
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| 44 |
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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| 51 |
greg |
2.4 |
#else
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| 52 |
gregl |
2.5 |
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| 53 |
gregl |
2.6 |
extern unsigned short *urperm;
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| 54 |
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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| 77 |
gregl |
2.5 |
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| 78 |
greg |
2.4 |
#endif
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