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Annotation of cci/usr/src/usr.lib/libF77/random_.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  *     @(#)random_.c   2.1
                      3:  * 
                      4:  * Routines to return random values
                      5:  *
                      6:  * calling sequence:
                      7:  *     double precision d, drandm
                      8:  *     i = irandm(iflag)
                      9:  *     x = random(iflag)
                     10:  *     d = drandm(iflag)
                     11:  * where:
                     12:  *     If arg is nonzero, generator is restarted and value is returned.
                     13:  *     If arg is 0, next value is returned.
                     14:  *     Integer values will range from 0 thru 2147483647 (see random(3)).
                     15:  *     Real values will range from 0.0 thru 1.0 .
                     16:  */
                     17: 
                     18: #define        RANDMAX         2147483647
                     19: 
                     20: long irandm_(iarg)
                     21: long *iarg;
                     22: {
                     23:        if (*iarg) srandom((int)*iarg);
                     24:        return( random() );
                     25: }
                     26: 
                     27: float random_(iarg)
                     28: long *iarg;
                     29: {
                     30:        if (*iarg) srandom((int)*iarg);
                     31:        return( (float)(random())/(float)RANDMAX );
                     32: }
                     33: 
                     34: double drandm_(iarg)
                     35: long *iarg;
                     36: {
                     37:        if (*iarg) srandom((int)*iarg);
                     38:        return( (double)(random())/(double)RANDMAX );
                     39: }

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