view libcruft/ranlib/ranf.f @ 2329:30c606bec7a8

[project @ 1996-07-19 01:29:05 by jwe] Initial revision
author jwe
date Fri, 19 Jul 1996 01:29:55 +0000
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      REAL FUNCTION ranf()
C**********************************************************************
C
C     REAL FUNCTION RANF()
C                RANDom number generator as a Function
C
C     Returns a random floating point number from a uniform distribution
C     over 0 - 1 (endpoints of this interval are not returned) using the
C     current generator
C
C     This is a transcription from Pascal to Fortran of routine
C     Uniform_01 from the paper
C
C     L'Ecuyer, P. and Cote, S. "Implementing a Random Number Package
C     with Splitting Facilities." ACM Transactions on Mathematical
C     Software, 17:98-111 (1991)
C
C**********************************************************************
C     .. External Functions ..
      INTEGER ignlgi
      EXTERNAL ignlgi
C     ..
C     .. Executable Statements ..
C
C     4.656613057E-10 is 1/M1  M1 is set in a data statement in IGNLGI
C      and is currently 2147483563. If M1 changes, change this also.
C
      ranf = ignlgi()*4.656613057E-10
      RETURN

      END