| Directory: | ./ |
|---|---|
| File: | misc/ran1.f |
| Date: | 2022-01-11 19:19:34 |
| Exec | Total | Coverage | |
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| Lines: | 21 | 21 | 100.0% |
| Branches: | 6 | 8 | 75.0% |
| Line | Branch | Exec | Source |
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| 1 | ! | ||
| 2 | ! $Id: ran1.F 2239 2015-03-23 07:27:30Z emillour $ | ||
| 3 | ! | ||
| 4 | 5379 | FUNCTION RAN1(IDUM) | |
| 5 | IMPLICIT NONE | ||
| 6 | REAL RAN1 | ||
| 7 | REAL,SAVE :: R(97) | ||
| 8 | REAL,PARAMETER :: RM1=3.8580247E-6,RM2=7.4373773E-6 | ||
| 9 | INTEGER,SAVE :: IFF=0 | ||
| 10 | integer,save :: ix1,ix2,ix3 | ||
| 11 | INTEGER,PARAMETER :: M1=259200,IA1=7141,IC1=54773 | ||
| 12 | INTEGER,PARAMETER :: M2=134456,IA2=8121,IC2=28411 | ||
| 13 | INTEGER,PARAMETER :: M3=243000,IA3=4561,IC3=51349 | ||
| 14 | INTEGER :: IDUM,J | ||
| 15 | |||
| 16 |
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5379 | IF (IDUM.LT.0.OR.IFF.EQ.0) THEN |
| 17 | 1 | IFF=1 | |
| 18 | 1 | IX1=MOD(IC1-IDUM,M1) | |
| 19 | 1 | IX1=MOD(IA1*IX1+IC1,M1) | |
| 20 | 1 | IX2=MOD(IX1,M2) | |
| 21 | 1 | IX1=MOD(IA1*IX1+IC1,M1) | |
| 22 | 1 | IX3=MOD(IX1,M3) | |
| 23 |
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98 | DO 11 J=1,97 |
| 24 | 97 | IX1=MOD(IA1*IX1+IC1,M1) | |
| 25 | 97 | IX2=MOD(IA2*IX2+IC2,M2) | |
| 26 | 97 | R(J)=(REAL(IX1)+REAL(IX2)*RM2)*RM1 | |
| 27 | 1 | 11 CONTINUE | |
| 28 | 1 | IDUM=1 | |
| 29 | ENDIF | ||
| 30 | 5379 | IX1=MOD(IA1*IX1+IC1,M1) | |
| 31 | 5379 | IX2=MOD(IA2*IX2+IC2,M2) | |
| 32 | 5379 | IX3=MOD(IA3*IX3+IC3,M3) | |
| 33 | 5379 | J=1+(97*IX3)/M3 | |
| 34 |
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5379 | IF(J.GT.97.OR.J.LT.1) stop 1 |
| 35 | 5379 | RAN1=R(J) | |
| 36 | 5379 | R(J)=(REAL(IX1)+REAL(IX2)*RM2)*RM1 | |
| 37 | RETURN | ||
| 38 | END | ||
| 39 |