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module in_out |
module new_unit_m |
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implicit none |
implicit none |
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private prep_file, go_column, s_pr_mat, d_pr_mat |
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interface pr_matrix |
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module procedure s_pr_mat, d_pr_mat |
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end interface |
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contains |
contains |
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!*********************************************************** |
subroutine new_unit(unit) |
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integer function new_unit() |
integer, intent(out):: unit |
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! Variables local to the procedure: |
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logical opened, exist |
logical opened, exist |
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!------------------------------------------------------ |
!------------------------------------------------------ |
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new_unit = 0 |
unit = 0 |
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do |
do |
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inquire(unit=new_unit, opened=opened, exist=exist) |
inquire(unit=unit, opened=opened, exist=exist) |
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if (exist .and. .not. opened) exit |
if (exist .and. .not. opened) exit |
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new_unit = new_unit + 1 |
unit = unit + 1 |
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end do |
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end function new_unit |
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!*********************************************************** |
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function csvread(file, first_r, first_c, last_r, last_c) |
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! Reads comma-separated numeric values in a file. The |
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! last column and/or last row parameters may be 0. This is |
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! interpreted as "last in the file". |
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real, pointer:: csvread(:,:) |
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character(len=*), intent(in):: file |
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integer, intent(in), optional:: first_r ! (first row to read) |
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integer, intent(in), optional:: first_c ! (first column to read) |
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integer, intent(in), optional:: last_r ! (last row to read) |
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integer, intent(in), optional:: last_c ! (last column to read) |
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! Variables local to the subprogram: |
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integer i, unit |
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integer f_r_loc ! (first row to read, local variable) |
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integer f_c_loc ! (first column to read, local variable) |
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integer l_r_loc ! (last row to read, local variable) |
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integer l_c_loc ! (last column to read, local variable) |
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!------------------------------------------------------ |
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print *, 'Reading data from file "' // file // '"' |
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unit = new_unit() |
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open(unit, file=file, status='old', action='read', position='rewind') |
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call prep_file(unit, first_r, first_c, last_r, last_c, f_r_loc, & |
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f_c_loc, l_r_loc, l_c_loc) |
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allocate(csvread(l_r_loc - f_r_loc + 1, l_c_loc - f_c_loc + 1)) |
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do i = 1, l_r_loc - f_r_loc + 1 |
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call go_column(unit, f_c_loc) |
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read(unit, fmt=*) csvread(i, :) |
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end do |
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! (no implicit loop in read to allow partial reading of a line) |
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close(unit) |
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end function csvread |
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!*********************************************************** |
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function csvread_dp(file, first_r, first_c, last_r, last_c) |
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! Reads comma-separated numeric values from a file, into a |
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! double precision array. The last column and/or last row parameters may be |
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! 0. This is interpreted as "last in the file". |
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double precision, pointer:: csvread_dp(:,:) |
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character(len=*), intent(in):: file |
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integer, intent(in), optional:: first_r ! (first row to read) |
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integer, intent(in), optional:: first_c ! (first column to read) |
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integer, intent(in), optional:: last_r ! (last row to read) |
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integer, intent(in), optional:: last_c ! (last column to read) |
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! Variables local to the subprogram: |
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integer i, unit |
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integer f_r_loc ! (first row to read, local variable) |
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integer f_c_loc ! (first column to read, local variable) |
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integer l_r_loc ! (last row to read, local variable) |
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integer l_c_loc ! (last column to read, local variable) |
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!------------------------------------------------------ |
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print *, 'Reading data from file "' // file // '"' |
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unit = new_unit() |
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open(unit, file=file, status='old', action='read', position='rewind') |
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call prep_file(unit, first_r, first_c, last_r, last_c, f_r_loc, & |
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f_c_loc, l_r_loc, l_c_loc) |
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allocate(csvread_dp(l_r_loc - f_r_loc + 1, l_c_loc - f_c_loc + 1)) |
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do i = 1, l_r_loc - f_r_loc + 1 |
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call go_column(unit, f_c_loc) |
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read(unit, fmt=*) csvread_dp(i, :) |
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end do |
end do |
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! (no implicit loop in read to allow partial reading of a line) |
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close(unit) |
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end function csvread_dp |
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!*********************************************************** |
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subroutine go_column(unit, column) |
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! This subroutine is used by the various versions of "csvread". On |
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! the current line of file, it advances to the input column. Columns are |
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! assumend to be separated by commas. |
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integer, intent(in):: unit ! logical unit for input file |
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integer, intent(in):: column |
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! Variables local to the subprogram: |
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integer j |
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character c |
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!------------------------------------------------------ |
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! Skip columns before "column" : |
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j = 1 ! column index |
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do while (j <= column - 1) |
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read(unit, fmt='(a)', advance='no') c |
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if (c == ',') j = j + 1 |
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end do |
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end subroutine go_column |
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!*********************************************************** |
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subroutine prep_file(unit, first_r, first_c, last_r, last_c, f_r_not_opt, & |
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f_c_not_opt, l_r_not_opt, l_c_not_opt) |
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! This subroutine is used by the various versions of "csvread". It |
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! fills non-optional arguments: first and last row, first and last |
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! column which will actually be read, taking information from the |
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! file itself if necessary. It also positions the input file on the |
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! first row to read. |
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integer, intent(in):: unit ! logical unit for input file |
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integer, intent(in), optional:: first_r ! (first row to read) |
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integer, intent(in), optional:: first_c ! (first column to read) |
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integer, intent(in), optional:: last_r ! (last row to read) |
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integer, intent(in), optional:: last_c ! (last column to read) |
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integer, intent(out):: f_r_not_opt ! (first row to read, not optional) |
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integer, intent(out):: f_c_not_opt ! (first column to read, not optional) |
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integer, intent(out):: l_r_not_opt ! (last row to read, not optional) |
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integer, intent(out):: l_c_not_opt ! (last column to read, not optional) |
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! Variables local to the subprogram: |
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integer iostat, i |
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character c |
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!------------------------------------------------------ |
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f_r_not_opt = opt_merge(first_r, 1) |
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f_c_not_opt = opt_merge(first_c, 1) |
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l_r_not_opt = opt_merge(last_r, 0) |
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l_c_not_opt = opt_merge(last_c, 0) |
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if (l_r_not_opt == 0) then |
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! Count the number of lines in the file: |
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i = 0 |
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do |
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read(unit, fmt=*, iostat=iostat) |
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if (iostat /= 0) exit |
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i = i + 1 |
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end do |
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l_r_not_opt = i |
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if (l_r_not_opt == 0) stop 'Empty file.' |
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rewind(unit) |
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end if |
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! Go to first row to read: |
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do i = 1, f_r_not_opt - 1 |
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read(unit, fmt=*) |
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end do |
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if (l_c_not_opt == 0) then |
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! Count the number of values per line: |
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i = 0 |
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do |
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read(unit, fmt='(a)', advance='no', iostat=iostat) c |
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if (iostat /= 0) exit |
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if (c == ',') i = i + 1 |
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end do |
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l_c_not_opt = i + 1 |
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backspace(unit) |
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end if |
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print *, 'Reading column(s) ', f_c_not_opt, ':', l_c_not_opt, & |
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', row(s) ', f_r_not_opt, ':', l_r_not_opt |
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end subroutine prep_file |
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!*********************************************************** |
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integer function opt_merge(param, default) |
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! Analogous to the intrinsic procedure "merge" : merges an |
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! optional parameter and a default value depending on the |
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! presence of the optional parameter. |
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integer, intent(in), optional:: param |
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integer, intent(in):: default |
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!-------------- |
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if (present(param)) then |
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opt_merge = param |
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else |
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opt_merge = default |
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end if |
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end function opt_merge |
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!*********************************************************** |
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subroutine s_pr_mat(name, a) |
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! This subroutine prints a rank 2 real matrix. |
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character(len=*), intent(in):: name |
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real, intent(in):: a(:,:) |
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character(len=20) fmt |
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integer n_lines, n_col, i |
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!----------------- |
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n_lines = size(a, 1) |
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n_col = size(a, 2) |
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if (n_lines <= 10 .and. n_col <= 5) then |
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print *, name, ":" |
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write(unit=fmt, fmt='("(1p, ", i0, "(g10.3: 1X))")') n_col |
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do i = 1, n_lines |
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print fmt, a(i, :) |
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end do |
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else |
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print *, '"', name, '" is too big to print.' |
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end if |
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end subroutine s_pr_mat |
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!*********************************************************** |
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subroutine d_pr_mat(name, a) |
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! This subroutine prints a rank 2 double precision matrix. |
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character(len=*), intent(in):: name |
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double precision, intent(in):: a(:,:) |
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character(len=20) fmt |
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integer n_lines, n_col, i |
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!----------------- |
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n_lines = size(a, 1) |
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n_col = size(a, 2) |
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if (n_lines <= 10 .and. n_col <= 5) then |
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print *, name, ":" |
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write(unit=fmt, fmt='("(1p, ", i0, "(g8.1: 1X))")') n_col |
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do i = 1, n_lines |
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print fmt, a(i, :) |
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end do |
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else |
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print *, '"', name, '" is too big to print.' |
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end if |
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end subroutine d_pr_mat |
end subroutine new_unit |
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end module in_out |
end module new_unit_m |
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