[6] | 1 | module m_dictionary |
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| 2 | |
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| 3 | use m_buffer |
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| 4 | private |
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| 5 | ! |
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| 6 | ! A very rough implementation for now |
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| 7 | ! It uses fixed-length buffers for key/value pairs, |
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| 8 | ! and the maximum number of dictionary items is hardwired. |
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| 9 | |
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| 10 | integer, parameter, private :: MAX_ITEMS = 64 |
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| 11 | type, public :: dictionary_t |
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| 12 | private |
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| 13 | integer :: number_of_items |
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| 14 | type(buffer_t), dimension(MAX_ITEMS) :: key |
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| 15 | type(buffer_t), dimension(MAX_ITEMS) :: value |
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| 16 | end type dictionary_t |
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| 17 | |
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| 18 | ! |
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| 19 | ! Building procedures |
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| 20 | ! |
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| 21 | public :: add_key_to_dict, add_value_to_dict, init_dict, reset_dict |
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| 22 | |
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| 23 | ! |
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| 24 | ! Query and extraction procedures |
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| 25 | ! |
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| 26 | public :: len |
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| 27 | interface len |
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| 28 | module procedure number_of_entries |
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| 29 | end interface |
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| 30 | public :: number_of_entries |
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| 31 | public :: get_key |
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| 32 | public :: get_value |
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| 33 | public :: has_key |
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| 34 | public :: print_dict |
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| 35 | ! |
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| 36 | public :: get_name |
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| 37 | |
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| 38 | interface get_name |
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| 39 | module procedure get_key |
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| 40 | end interface |
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| 41 | |
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| 42 | interface get_value |
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| 43 | module procedure sax_get_value |
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| 44 | end interface |
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| 45 | private :: sax_get_value |
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| 46 | |
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| 47 | CONTAINS |
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| 48 | |
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| 49 | !------------------------------------------------------ |
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| 50 | function number_of_entries(dict) result(n) |
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| 51 | type(dictionary_t), intent(in) :: dict |
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| 52 | integer :: n |
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| 53 | |
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| 54 | n = dict%number_of_items |
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| 55 | |
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| 56 | end function number_of_entries |
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| 57 | |
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| 58 | !------------------------------------------------------ |
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| 59 | function has_key(dict,key) result(found) |
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| 60 | type(dictionary_t), intent(in) :: dict |
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| 61 | character(len=*), intent(in) :: key |
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| 62 | logical :: found |
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| 63 | |
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| 64 | integer :: n, i |
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| 65 | found = .false. |
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| 66 | n = dict%number_of_items |
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| 67 | do i = 1, n |
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| 68 | if (dict%key(i) .EQUAL. key) then |
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| 69 | found = .true. |
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| 70 | exit |
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| 71 | endif |
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| 72 | enddo |
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| 73 | end function has_key |
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| 74 | |
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| 75 | !------------------------------------------------------ |
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| 76 | subroutine sax_get_value(dict,key,value,status) |
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| 77 | type(dictionary_t), intent(in) :: dict |
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| 78 | character(len=*), intent(in) :: key |
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| 79 | character(len=*), intent(out) :: value |
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| 80 | integer, intent(out) :: status |
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| 81 | ! |
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| 82 | integer :: n, i |
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| 83 | |
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| 84 | status = -1 |
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| 85 | n = dict%number_of_items |
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| 86 | do i = 1, n |
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| 87 | if (dict%key(i) .EQUAL. key) then |
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| 88 | value = str(dict%value(i)) |
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| 89 | status = 0 |
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| 90 | RETURN |
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| 91 | endif |
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| 92 | enddo |
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| 93 | |
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| 94 | end subroutine sax_get_value |
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| 95 | |
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| 96 | !------------------------------------------------------ |
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| 97 | subroutine get_key(dict,i,key,status) |
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| 98 | ! |
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| 99 | ! Get the i'th key |
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| 100 | ! |
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| 101 | type(dictionary_t), intent(in) :: dict |
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| 102 | integer, intent(in) :: i |
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| 103 | character(len=*), intent(out) :: key |
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| 104 | integer, intent(out) :: status |
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| 105 | |
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| 106 | if (i <= dict%number_of_items) then |
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| 107 | key = str(dict%key(i)) |
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| 108 | status = 0 |
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| 109 | else |
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| 110 | key = "" |
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| 111 | status = -1 |
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| 112 | endif |
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| 113 | |
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| 114 | end subroutine get_key |
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| 115 | |
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| 116 | !------------------------------------------------------ |
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| 117 | subroutine add_key_to_dict(key,dict) |
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| 118 | type(buffer_t), intent(in) :: key |
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| 119 | type(dictionary_t), intent(inout) :: dict |
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| 120 | |
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| 121 | integer :: n |
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| 122 | |
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| 123 | n = dict%number_of_items |
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| 124 | if (n == MAX_ITEMS) then |
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| 125 | write(unit=0,fmt=*) "Dictionary capacity exceeded ! size= ", max_items |
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| 126 | RETURN |
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| 127 | endif |
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| 128 | |
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| 129 | n = n + 1 |
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| 130 | dict%key(n) = key |
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| 131 | dict%number_of_items = n |
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| 132 | |
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| 133 | end subroutine add_key_to_dict |
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| 134 | |
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| 135 | !------------------------------------------------------ |
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| 136 | ! Assumes we build the dictionary in an orderly fashion, |
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| 137 | ! so one adds first the key and then immediately afterwards the value. |
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| 138 | ! |
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| 139 | subroutine add_value_to_dict(value,dict) |
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| 140 | type(buffer_t), intent(in) :: value |
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| 141 | type(dictionary_t), intent(inout) :: dict |
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| 142 | |
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| 143 | integer :: n |
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| 144 | |
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| 145 | n = dict%number_of_items |
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| 146 | dict%value(n) = value |
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| 147 | |
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| 148 | end subroutine add_value_to_dict |
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| 149 | |
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| 150 | !------------------------------------------------------ |
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| 151 | subroutine init_dict(dict) |
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| 152 | type(dictionary_t), intent(inout) :: dict |
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| 153 | |
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| 154 | integer :: i |
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| 155 | |
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| 156 | dict%number_of_items = 0 |
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| 157 | do i=1, MAX_ITEMS ! To avoid "undefined" status |
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| 158 | call init_buffer(dict%key(i)) ! (Fortran90 restriction) |
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| 159 | call init_buffer(dict%value(i)) |
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| 160 | enddo |
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| 161 | end subroutine init_dict |
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| 162 | !------------------------------------------------------ |
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| 163 | subroutine reset_dict(dict) |
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| 164 | type(dictionary_t), intent(inout) :: dict |
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| 165 | |
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| 166 | dict%number_of_items = 0 |
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| 167 | |
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| 168 | end subroutine reset_dict |
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| 169 | |
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| 170 | !------------------------------------------------------ |
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| 171 | subroutine print_dict(dict) |
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| 172 | type(dictionary_t), intent(in) :: dict |
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| 173 | |
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| 174 | integer :: i |
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| 175 | |
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| 176 | do i = 1, dict%number_of_items |
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| 177 | print *, trim(str(dict%key(i))), " = ", trim(str(dict%value(i))) |
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| 178 | enddo |
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| 179 | |
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| 180 | end subroutine print_dict |
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| 181 | |
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| 182 | |
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| 183 | end module m_dictionary |
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