10.4.1_peseiGFS_025bugfixes+enhancementsdevrelease-10release-10.4.1scaling-bug
Last change
on this file since 9ca6e38 was
3481cc1,
checked in by Ignacio Pisso <ip@…>, 5 years ago
|
move license from headers to a different file
|
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File size:
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Rev | Line | |
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[e200b7a] | 1 | ! From numerical recipes |
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| 2 | ! Change by A. Stohl: Use of integer instead of real values |
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| 3 | |
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| 4 | subroutine sort2(n,arr,brr) |
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| 5 | |
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| 6 | implicit none |
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| 7 | |
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| 8 | integer :: n |
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| 9 | integer :: arr(n),brr(n) |
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| 10 | integer,parameter :: m=7,nstack=50 |
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| 11 | integer :: i,ir,j,jstack,k,l,istack(nstack) |
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| 12 | integer :: a,b,temp |
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| 13 | jstack=0 |
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| 14 | l=1 |
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| 15 | ir=n |
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| 16 | 1 if(ir-l.lt.m)then |
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| 17 | do j=l+1,ir |
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| 18 | a=arr(j) |
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| 19 | b=brr(j) |
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| 20 | do i=j-1,1,-1 |
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| 21 | if(arr(i).le.a)goto 2 |
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| 22 | arr(i+1)=arr(i) |
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| 23 | brr(i+1)=brr(i) |
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| 24 | end do |
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| 25 | i=0 |
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| 26 | 2 arr(i+1)=a |
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| 27 | brr(i+1)=b |
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| 28 | end do |
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| 29 | if(jstack.eq.0)return |
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| 30 | ir=istack(jstack) |
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| 31 | l=istack(jstack-1) |
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| 32 | jstack=jstack-2 |
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| 33 | else |
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| 34 | k=(l+ir)/2 |
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| 35 | temp=arr(k) |
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| 36 | arr(k)=arr(l+1) |
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| 37 | arr(l+1)=temp |
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| 38 | temp=brr(k) |
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| 39 | brr(k)=brr(l+1) |
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| 40 | brr(l+1)=temp |
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| 41 | if(arr(l+1).gt.arr(ir))then |
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| 42 | temp=arr(l+1) |
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| 43 | arr(l+1)=arr(ir) |
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| 44 | arr(ir)=temp |
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| 45 | temp=brr(l+1) |
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| 46 | brr(l+1)=brr(ir) |
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| 47 | brr(ir)=temp |
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| 48 | endif |
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| 49 | if(arr(l).gt.arr(ir))then |
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| 50 | temp=arr(l) |
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| 51 | arr(l)=arr(ir) |
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| 52 | arr(ir)=temp |
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| 53 | temp=brr(l) |
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| 54 | brr(l)=brr(ir) |
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| 55 | brr(ir)=temp |
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| 56 | endif |
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| 57 | if(arr(l+1).gt.arr(l))then |
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| 58 | temp=arr(l+1) |
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| 59 | arr(l+1)=arr(l) |
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| 60 | arr(l)=temp |
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| 61 | temp=brr(l+1) |
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| 62 | brr(l+1)=brr(l) |
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| 63 | brr(l)=temp |
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| 64 | endif |
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| 65 | i=l+1 |
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| 66 | j=ir |
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| 67 | a=arr(l) |
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| 68 | b=brr(l) |
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| 69 | 3 continue |
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| 70 | i=i+1 |
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| 71 | if(arr(i).lt.a)goto 3 |
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| 72 | 4 continue |
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| 73 | j=j-1 |
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| 74 | if(arr(j).gt.a)goto 4 |
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| 75 | if(j.lt.i)goto 5 |
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| 76 | temp=arr(i) |
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| 77 | arr(i)=arr(j) |
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| 78 | arr(j)=temp |
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| 79 | temp=brr(i) |
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| 80 | brr(i)=brr(j) |
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| 81 | brr(j)=temp |
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| 82 | goto 3 |
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| 83 | 5 arr(l)=arr(j) |
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| 84 | arr(j)=a |
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| 85 | brr(l)=brr(j) |
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| 86 | brr(j)=b |
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| 87 | jstack=jstack+2 |
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| 88 | if(jstack.gt.nstack) then |
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| 89 | print*, 'nstack too small in sort2' |
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| 90 | stop |
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| 91 | end if |
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| 92 | if(ir-i+1.ge.j-l)then |
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| 93 | istack(jstack)=ir |
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| 94 | istack(jstack-1)=i |
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| 95 | ir=j-1 |
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| 96 | else |
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| 97 | istack(jstack)=j-1 |
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| 98 | istack(jstack-1)=l |
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| 99 | l=i |
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| 100 | endif |
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| 101 | endif |
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| 102 | goto 1 |
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| 103 | end subroutine sort2 |
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| 104 | ! (C) Copr. 1986-92 Numerical Recipes Software us. |
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