| 1 |
< |
/* Copyright (c) 1986 Regents of the University of California */ |
| 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) function. |
| 6 |
> |
* random.h - header file for random(3) and urand() function. |
| 7 |
|
* |
| 8 |
|
* 10/1/85 |
| 9 |
|
*/ |
| 10 |
|
|
| 11 |
< |
#ifdef BSD |
| 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.)) |
| 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() |
| 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; |
