| 1 | PROGRAM load_nml |
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| 2 | CHARACTER(LEN=:) , ALLOCATABLE :: cdnambuff |
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| 3 | CHARACTER(LEN=20) :: cdnamfile='./nambdy' |
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| 4 | CHARACTER(LEN=256) :: chline |
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| 5 | CHARACTER(LEN=1) :: chsep |
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| 6 | INTEGER :: kout |
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| 7 | LOGICAL :: ldwp =.TRUE. !: .true. only for the root broadcaster |
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| 8 | INTEGER :: itot, iun, iltc, inl, ios, itotsav |
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| 9 | INTEGER :: nbdyind |
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| 10 | INTEGER :: nbdy_rdstart, nbdy_count, nbdy_loc |
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| 11 | NAMELIST /nambdy_index/nbdyind |
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| 12 | ! |
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| 13 | ! Check if the namelist buffer has already been allocated. Return if it has. |
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| 14 | ! |
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| 15 | !chsep = NEW_LINE('A') |
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| 16 | chsep = ' ' |
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| 17 | IF ( ALLOCATED( cdnambuff ) ) STOP |
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| 18 | IF( ldwp ) THEN |
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| 19 | ! |
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| 20 | ! Open namelist file |
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| 21 | ! |
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| 22 | iun=15 |
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| 23 | OPEN ( unit=iun, file=cdnamfile) |
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| 24 | ! |
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| 25 | ! First pass: count characters excluding comments and trimable white space |
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| 26 | ! |
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| 27 | itot=0 |
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| 28 | 10 READ(iun,'(A256)',END=20,ERR=20) chline |
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| 29 | iltc = LEN_TRIM(chline) |
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| 30 | IF ( iltc.GT.0 ) THEN |
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| 31 | inl = INDEX(chline, '!') |
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| 32 | IF( inl.eq.0 ) THEN |
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| 33 | itot = itot + iltc + 1 ! +1 for the newline character |
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| 34 | ELSEIF( inl.GT.0 .AND. LEN_TRIM( chline(1:inl-1) ).GT.0 ) THEN |
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| 35 | itot = itot + inl ! includes +1 for the newline character |
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| 36 | ENDIF |
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| 37 | ENDIF |
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| 38 | GOTO 10 |
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| 39 | 20 CONTINUE |
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| 40 | ! |
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| 41 | ! Allocate text cdnambuff for condensed namelist |
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| 42 | ! |
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| 43 | !$AGRIF_DO_NOT_TREAT |
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| 44 | ALLOCATE( CHARACTER(LEN=itot) :: cdnambuff ) |
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| 45 | !$AGRIF_END_DO_NOT_TREAT |
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| 46 | itotsav = itot |
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| 47 | ! |
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| 48 | ! Second pass: read and transfer pruned characters into cdnambuff |
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| 49 | ! |
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| 50 | REWIND(iun) |
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| 51 | itot=1 |
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| 52 | 30 READ(iun,'(A256)',END=40,ERR=40) chline |
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| 53 | iltc = LEN_TRIM(chline) |
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| 54 | IF ( iltc.GT.0 ) THEN |
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| 55 | inl = INDEX(chline, '!') |
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| 56 | IF( inl.eq.0 ) THEN |
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| 57 | inl = iltc |
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| 58 | ELSE |
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| 59 | inl = inl - 1 |
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| 60 | ENDIF |
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| 61 | IF( inl.GT.0 .AND. LEN_TRIM( chline(1:inl) ).GT.0 ) THEN |
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| 62 | cdnambuff(itot:itot+inl-1) = chline(1:inl) |
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| 63 | WRITE( cdnambuff(itot+inl:itot+inl), '(a)' ) chsep |
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| 64 | itot = itot + inl + 1 |
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| 65 | ENDIF |
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| 66 | ENDIF |
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| 67 | GOTO 30 |
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| 68 | 40 CONTINUE |
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| 69 | itot = itot - 1 |
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| 70 | IF( itotsav .NE. itot ) WRITE(*,*) 'WARNING in load_nml. Allocated ',itotsav,' for read buffer; but used ',itot |
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| 71 | ! |
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| 72 | ! Test the contents of the internal file |
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| 73 | ! |
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| 74 | ! Write it all out: |
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| 75 | write(6,'(a)') 'The whole internal file: ' |
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| 76 | write(6,'(32A)') cdnambuff |
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| 77 | write(6,'(a)')'----' |
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| 78 | ! Write out a sub-string of it |
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| 79 | write(6,'(a)') '25 characters from position 20: ' |
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| 80 | read(cdnambuff(20:),'(A25)') chline |
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| 81 | write(6,'(a)') TRIM(chline) |
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| 82 | write(6,'(a)')'----' |
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| 83 | write(6,'(a,i5)') 'Length of the compressed internal file: ',LEN_TRIM(cdnambuff) |
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| 84 | write(6,'(a)')'----' |
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| 85 | write(6,'(a)') 'nbdyind in the 1st occurrence of nambdy_index: ' |
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| 86 | read(cdnambuff(:), nambdy_index, end=99, err=99) |
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| 87 | write(6,'(a,i5)') 'nbdyind = ',nbdyind |
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| 88 | write(6,'(a)')'----' |
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| 89 | ! Now test reading the 4th occurrence of the namelist |
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| 90 | nbdy_rdstart = 1 |
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| 91 | DO nbdy_count = 1, 4 |
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| 92 | nbdy_loc = INDEX( cdnambuff( nbdy_rdstart: ), 'nambdy_index' ) |
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| 93 | IF( nbdy_loc .GT. 0 ) THEN |
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| 94 | nbdy_rdstart = nbdy_rdstart + nbdy_loc |
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| 95 | ELSE |
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| 96 | WRITE(*,'(A,I4,A)') 'Error: entry number ',nbdy_count,' of nambdy_index not found' |
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| 97 | ENDIF |
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| 98 | END DO |
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| 99 | nbdy_rdstart = MAX( 1, nbdy_rdstart - 2 ) |
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| 100 | read(cdnambuff(nbdy_rdstart:), nambdy_index, end=99, err=99) |
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| 101 | write(*,'(a,i5)') 'nbdyind in the 4th occurence of nbdyind = ',nbdyind |
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| 102 | goto 101 |
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| 103 | ! |
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| 104 | 99 write(6,'(a)') 'Not found' |
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| 105 | ! |
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| 106 | 101 REWIND(iun) |
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| 107 | write(6,'(a)')'----' |
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| 108 | write(6,'(a)')'Finally the first occurrence directly from the external namelist: ' |
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| 109 | read(iun,nambdy_index) |
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| 110 | write(*,'(a,i5)') 'nbdyind = ',nbdyind |
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| 111 | write(6,'(a)')'----' |
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| 112 | ! |
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| 113 | ! Close namelist file |
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| 114 | ! |
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| 115 | CLOSE(iun) |
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| 116 | ENDIF |
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| 117 | END PROGRAM load_nml |
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