1 files changed, 54 insertions, 0 deletions
diff --git a/src/slalib/random.f_ix86_Linux b/src/slalib/random.f_ix86_Linux
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+      REAL FUNCTION sla_RANDOM (SEED)
+*+
+*     - - - - - - -
+*      R A N D O M
+*     - - - - - - -
+*
+*  Generate pseudo-random real number in the range 0 <= X < 1.
+*  (single precision)
+*
+*  !!!  Version for Linux !!!
+*
+*  Given:
+*     SEED     real     an arbitrary real number
+*
+*  Notes:
+*
+*  1)  The result is a pseudo-random REAL number in the range
+*      0 <= sla_RANDOM < 1.
+*
+*  2)  SEED is used first time through only.
+*
+*  Called:  RANDOM (a REAL function compiled by the makefile from rtl_random.c)
+*
+*  B.K.McIlwrath Starlink   12 January 1996
+*-
+
+      IMPLICIT NONE
+
+      REAL SEED
+
+      REAL RANDOM
+
+      REAL AS
+      INTEGER ISEED
+      LOGICAL FIRST
+      SAVE FIRST
+      DATA FIRST /.TRUE./
+
+
+
+*  If first time, turn SEED into a large, odd integer
+      IF (FIRST) THEN
+         AS=ABS(SEED)+1.0
+         ISEED=NINT(AS/10.0**(NINT(ALOG10(AS))-6))
+         IF (MOD(ISEED,2).EQ.0) ISEED=ISEED+1
+         FIRST=.FALSE.
+      ELSE
+         ISEED = 0
+      END IF
+
+*  Next pseudo-random number
+      sla_RANDOM=RANDOM(ISEED)
+
+      END