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

1.1       root        1: /*
                      2: char id_rand[] = "@(#)rand_.c  1.1";
                      3:  *
                      4:  * Routines to return random values
                      5:  *
                      6:  * calling sequence:
                      7:  *     double precision d, drand
                      8:  *     i = irand(iflag)
                      9:  *     x = rand(iflag)
                     10:  *     d = drand(iflag)
                     11:  * where:
                     12:  *     If arg is 1, generator is restarted. If arg is 0, next value
                     13:  *     is returned. Any other arg is a new seed for the generator.
                     14:  *     Integer values will range from 0 thru 2147483647.
                     15:  *     Real values will range from 0.0 thru 1.0
                     16:  *     (see rand(3))
                     17:  */
                     18: 
                     19: #define        RANDMAX         2147483647
                     20: 
                     21: long irand_(iarg)
                     22: long *iarg;
                     23: {
                     24:        if (*iarg) srand((int)*iarg);
                     25:        return( rand() );
                     26: }
                     27: 
                     28: float rand_(iarg)
                     29: long *iarg;
                     30: {
                     31:        if (*iarg) srand((int)*iarg);
                     32:        return( (float)(rand())/(float)RANDMAX );
                     33: }
                     34: 
                     35: double drand_(iarg)
                     36: long *iarg;
                     37: {
                     38:        if (*iarg) srand((int)*iarg);
                     39:        return( (double)(rand())/(double)RANDMAX );
                     40: }

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