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Annotation of 43BSDTahoe/usr.lib/libF77/random_.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  *
                      6:  *     @(#)random_.c   5.3     10/30/86
                      7:  * 
                      8:  * Routines to return random values
                      9:  *
                     10:  * calling sequence:
                     11:  *     double precision d, drandm
                     12:  *     i = irandm(iflag)
                     13:  *     x = random(iflag)
                     14:  *     d = drandm(iflag)
                     15:  * where:
                     16:  *     If arg is nonzero, generator is restarted and value is returned.
                     17:  *     If arg is 0, next value is returned.
                     18:  *     Integer values will range from 0 thru 2147483647 (see random(3)).
                     19:  *     Real values will range from 0.0 thru 1.0 .
                     20:  */
                     21: 
                     22: #if    defined(vax) || defined(tahoe)
                     23: #define        RANDMAX         2147483647
                     24: #else  vax || tahoe
                     25:        UNKNOWN MACHINE!
                     26: #endif vax || tahoe
                     27: 
                     28: long irandm_(iarg)
                     29: long *iarg;
                     30: {
                     31:        if (*iarg) srandom((int)*iarg);
                     32:        return( random() );
                     33: }
                     34: 
                     35: float random_(iarg)
                     36: long *iarg;
                     37: {
                     38:        if (*iarg) srandom((int)*iarg);
                     39:        return( (float)(random())/(float)RANDMAX );
                     40: }
                     41: 
                     42: double drandm_(iarg)
                     43: long *iarg;
                     44: {
                     45:        if (*iarg) srandom((int)*iarg);
                     46:        return( (double)(random())/(double)RANDMAX );
                     47: }

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