43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2007 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_string.h"
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#include "gtm_time.h"
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#include "op.h"
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#include "mvalconv.h"
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GBLREF int4 process_id;
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double drand48(void);
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void srand48(long int);
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void op_fnrandom (int4 interval, mval *ret)
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{
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static int4 seed = 0;
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error_def (ERR_RANDARGNEG);
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int4 random;
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if (interval < 1)
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{
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rts_error(VARLSTCNT(1) ERR_RANDARGNEG);
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}
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if (seed == 0)
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{
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seed = (int4)(time(0) * process_id);
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srand48(seed);
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}
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random = (int4)(interval * drand48());
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random = random & 0x7fffffff; /* to make sure that the sign bit(msb) is off*/
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MV_FORCE_MVAL(ret, random);
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}
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