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