[1765] | 1 | module prep_file_m |
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| 2 | |
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| 3 | implicit none |
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| 4 | |
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| 5 | contains |
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| 6 | |
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| 7 | subroutine prep_file(unit, first_r, first_c, last_r, last_c, f_r_not_opt, & |
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| 8 | f_c_not_opt, l_r_not_opt, l_c_not_opt) |
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| 9 | |
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| 10 | ! This subroutine is used by "csvread". It fills non-optional |
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| 11 | ! arguments: first and last row, first and last column which will |
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| 12 | ! actually be read, taking information from the file itself if |
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| 13 | ! necessary. It also positions the input file on the first row to |
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| 14 | ! read. |
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| 15 | |
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| 16 | use opt_merge_m, only: opt_merge |
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| 17 | |
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| 18 | integer, intent(in):: unit ! logical unit for input file |
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| 19 | integer, intent(in), optional:: first_r ! (first row to read) |
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| 20 | integer, intent(in), optional:: first_c ! (first column to read) |
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| 21 | integer, intent(in), optional:: last_r ! (last row to read) |
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| 22 | integer, intent(in), optional:: last_c ! (last column to read) |
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| 23 | integer, intent(out):: f_r_not_opt ! (first row to read, not optional) |
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| 24 | integer, intent(out):: f_c_not_opt ! (first column to read, not optional) |
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| 25 | integer, intent(out):: l_r_not_opt ! (last row to read, not optional) |
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| 26 | integer, intent(out):: l_c_not_opt ! (last column to read, not optional) |
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| 27 | |
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| 28 | ! Variables local to the subprogram: |
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| 29 | integer iostat, i |
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| 30 | character c |
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| 31 | logical prev_value ! previous character was part of a value |
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| 32 | logical curr_value ! current character is part of a value |
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| 33 | |
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| 34 | !------------------------------------------------------ |
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| 35 | |
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| 36 | f_r_not_opt = opt_merge(first_r, 1) |
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| 37 | f_c_not_opt = opt_merge(first_c, 1) |
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| 38 | l_r_not_opt = opt_merge(last_r, 0) |
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| 39 | l_c_not_opt = opt_merge(last_c, 0) |
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| 40 | |
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| 41 | if (l_r_not_opt == 0) then |
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| 42 | ! Count the number of lines in the file: |
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| 43 | l_r_not_opt = 0 |
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| 44 | do |
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| 45 | read(unit, fmt=*, iostat=iostat) |
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| 46 | if (iostat /= 0) exit |
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| 47 | l_r_not_opt = l_r_not_opt + 1 |
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| 48 | end do |
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| 49 | if (l_r_not_opt == 0) stop 'Empty file.' |
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| 50 | |
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| 51 | rewind(unit) |
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| 52 | end if |
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| 53 | |
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| 54 | ! Go to first row to read: |
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| 55 | do i = 1, f_r_not_opt - 1 |
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| 56 | read(unit, fmt=*) |
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| 57 | end do |
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| 58 | |
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| 59 | if (l_c_not_opt == 0) then |
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| 60 | ! Count the number of values per line: |
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| 61 | l_c_not_opt = 0 |
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| 62 | curr_value = .false. |
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| 63 | do |
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| 64 | read(unit, fmt='(a)', advance='no', iostat=iostat) c |
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| 65 | if (iostat /= 0) exit |
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| 66 | prev_value = curr_value |
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| 67 | curr_value = c /= " " .and. c /= "," |
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| 68 | if (curr_value .and. .not. prev_value) l_c_not_opt = l_c_not_opt + 1 |
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| 69 | end do |
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| 70 | |
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| 71 | backspace(unit) |
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| 72 | end if |
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| 73 | |
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| 74 | print *, 'Reading column(s) ', f_c_not_opt, ':', l_c_not_opt, & |
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| 75 | ', row(s) ', f_r_not_opt, ':', l_r_not_opt |
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| 76 | |
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| 77 | end subroutine prep_file |
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| 78 | |
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| 79 | end module prep_file_m |
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