| 1 |
/* Copyright (c) 1992 Regents of the University of California */
|
| 2 |
|
| 3 |
/* SCCSid "$SunId$ LBL" */
|
| 4 |
|
| 5 |
/*
|
| 6 |
* random.h - header file for random(3) and urand() function.
|
| 7 |
*
|
| 8 |
* 10/1/85
|
| 9 |
*/
|
| 10 |
|
| 11 |
#ifdef MSDOS
|
| 12 |
|
| 13 |
#define random() ((long)rand()<<16^(long)rand()<<6^(long)rand()>>4)
|
| 14 |
|
| 15 |
#define frandom() (rand()*(1./32768.))
|
| 16 |
|
| 17 |
#else
|
| 18 |
#ifdef BSD
|
| 19 |
|
| 20 |
extern long random();
|
| 21 |
|
| 22 |
#define frandom() (random()*(1./2147483648.))
|
| 23 |
|
| 24 |
#else
|
| 25 |
|
| 26 |
extern long lrand48();
|
| 27 |
extern double drand48();
|
| 28 |
|
| 29 |
#define random() lrand48()
|
| 30 |
#define frandom() drand48()
|
| 31 |
|
| 32 |
#endif
|
| 33 |
#endif
|
| 34 |
|
| 35 |
#ifdef MC
|
| 36 |
#define urand(i) frandom()
|
| 37 |
#else
|
| 38 |
#define urand(i) ((urperm[(i)&urmask]+frandom())/(urmask+1))
|
| 39 |
#endif
|
| 40 |
|
| 41 |
extern short *urperm;
|
| 42 |
extern int urmask;
|
