| 1 | module re_alloc |
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| 2 | |
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| 3 | interface realloc |
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| 4 | module procedure realloc_c1 |
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| 5 | module procedure realloc_r |
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| 6 | module procedure realloc_i |
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| 7 | !! subroutine realloc_c1(c,n,m,istat) |
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| 8 | !! character(len=1),pointer,dimension(:) :: c |
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| 9 | !! integer :: n,m |
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| 10 | !! integer :: istat |
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| 11 | !! end subroutine |
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| 12 | !! subroutine realloc_r(c,n,m,istat) |
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| 13 | !! real,pointer,dimension(:) :: c |
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| 14 | !! integer :: n,m |
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| 15 | !! integer :: istat |
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| 16 | !! end subroutine |
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| 17 | !! subroutine realloc_i(c,n,m,istat) |
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| 18 | !! integer,pointer,dimension(:) :: c |
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| 19 | !! integer :: n,m |
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| 20 | !! integer :: istat |
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| 21 | !! end subroutine |
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| 22 | end interface |
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| 23 | |
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| 24 | contains |
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| 25 | |
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| 26 | subroutine realloc_c1(c,n,m,istat) |
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| 27 | character(len=1),pointer,dimension(:) :: c |
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| 28 | integer,intent(in) :: n,m |
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| 29 | integer,intent(out) :: istat |
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| 30 | integer :: num |
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| 31 | character(len=1),pointer,dimension(:) :: tmp |
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| 32 | |
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| 33 | istat=0 |
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| 34 | if ( (n<0) .OR. (m<=0) ) then |
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| 35 | istat=10 |
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| 36 | return |
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| 37 | endif |
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| 38 | |
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| 39 | if ( .not. associated(c) ) then |
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| 40 | allocate(c(m),stat=istat) ! allocate new memory |
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| 41 | return |
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| 42 | endif |
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| 43 | |
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| 44 | tmp=>c ! save pointer to original mem |
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| 45 | nullify(c) |
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| 46 | allocate(c(m),stat=istat) ! allocate new memory |
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| 47 | if ( istat /= 0 ) then |
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| 48 | c=>tmp |
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| 49 | return |
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| 50 | endif |
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| 51 | if ( n /= 0 ) then |
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| 52 | num=min(n,m) |
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| 53 | c(1:num)=tmp(1:num) ! copy data from orig mem to new loc. |
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| 54 | endif |
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| 55 | deallocate(tmp) ! deallocate original memory |
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| 56 | return |
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| 57 | end subroutine |
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| 58 | |
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| 59 | subroutine realloc_r(c,n,m,istat) |
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| 60 | real,pointer,dimension(:) :: c |
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| 61 | integer,intent(in) :: n,m |
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| 62 | integer,intent(out) :: istat |
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| 63 | integer :: num |
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| 64 | real,pointer,dimension(:) :: tmp |
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| 65 | |
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| 66 | istat=0 |
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| 67 | if ( (n<0) .OR. (m<=0) ) then |
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| 68 | istat=10 |
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| 69 | return |
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| 70 | endif |
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| 71 | |
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| 72 | if ( .not. associated(c) ) then |
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| 73 | allocate(c(m),stat=istat) ! allocate new memory |
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| 74 | return |
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| 75 | endif |
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| 76 | |
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| 77 | tmp=>c ! save pointer to original mem |
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| 78 | nullify(c) |
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| 79 | allocate(c(m),stat=istat) ! allocate new memory |
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| 80 | if ( istat /= 0 ) then |
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| 81 | c=>tmp |
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| 82 | return |
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| 83 | endif |
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| 84 | if ( n /= 0 ) then |
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| 85 | num=min(n,m) |
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| 86 | c(1:num)=tmp(1:num) ! copy data from orig mem to new loc. |
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| 87 | endif |
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| 88 | deallocate(tmp) ! deallocate original memory |
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| 89 | return |
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| 90 | end subroutine |
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| 91 | |
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| 92 | subroutine realloc_i(c,n,m,istat) |
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| 93 | integer,pointer,dimension(:) :: c |
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| 94 | integer,intent(in) :: n,m |
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| 95 | integer,intent(out) :: istat |
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| 96 | integer :: num |
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| 97 | integer,pointer,dimension(:) :: tmp |
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| 98 | |
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| 99 | istat=0 |
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| 100 | if ( (n<0) .OR. (m<=0) ) then |
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| 101 | istat=10 |
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| 102 | return |
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| 103 | endif |
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| 104 | |
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| 105 | if ( .not. associated(c) ) then |
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| 106 | allocate(c(m),stat=istat) ! allocate new memory |
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| 107 | return |
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| 108 | endif |
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| 109 | |
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| 110 | tmp=>c ! save pointer to original mem |
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| 111 | nullify(c) |
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| 112 | allocate(c(m),stat=istat) ! allocate new memory |
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| 113 | if ( istat /= 0 ) then |
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| 114 | c=>tmp |
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| 115 | return |
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| 116 | endif |
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| 117 | if ( n /= 0 ) then |
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| 118 | num=min(n,m) |
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| 119 | c(1:num)=tmp(1:num) ! copy data from orig mem to new loc. |
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| 120 | endif |
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| 121 | deallocate(tmp) ! deallocate original memory |
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| 122 | return |
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| 123 | end subroutine |
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| 124 | |
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| 125 | end module re_alloc |
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