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introduce _assert and _strarray2str helper subroutines for Fortran
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@ -1878,7 +1878,7 @@ contains
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integer(8) function trexio_open (filename, mode, backend)
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use, intrinsic :: iso_c_binding
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implicit none
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character(len=*) :: filename
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character(len=*), intent(in) :: filename
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character, intent(in), value :: mode
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integer(trexio_backend), intent(in), value :: backend
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character(len=len_trim(filename)+1) :: filename_c
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@ -1888,6 +1888,55 @@ contains
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end function trexio_open
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#+end_src
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The subroutine below transforms an array of Fortran strings into one big string using ~TREXIO_DELIM~ symbol
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as a delimeter and adds ~NULL~ character in the end in order to properly pass the desired string to
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C API. This is needed due to the fact that strings in C are terminated by ~NULL~ character ~\0~.
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#+begin_src f90 :tangle suffix_fortran.f90
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subroutine trexio_strarray2str(str_array, max_num_str, max_len_str, str_res)
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use, intrinsic :: iso_c_binding, only : c_null_char
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implicit none
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integer, intent(in), value :: max_num_str ! number of elements in strign array
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integer, intent(in), value :: max_len_str ! maximum length of a string in an array
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character(len=max_len_str), intent(in) :: str_array(*)
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character(len=:), allocatable, intent(out) :: str_res
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integer :: i
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str_res = ''
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do i = 1, max_num_str
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str_res = str_res // trim(str_array(i)) // TREXIO_DELIM
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enddo
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str_res = str_res // c_null_char
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end subroutine trexio_strarray2str
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#+end_src
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The subroutine is a Fortran analogue of ~assert~ in C. It check that the the return code of the
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TREXIO API call is equal to a given return code. It can optionally print a success message if the
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two code are identical, i.e. if the ~assert~ statement pass.
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#+begin_src f90 :tangle suffix_fortran.f90
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subroutine trexio_assert(trexio_rc, check_rc, success_message)
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implicit none
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integer, intent(in), value :: trexio_rc
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integer, intent(in), value :: check_rc
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character(len=*), intent(in), optional :: success_message
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character*(128) :: str
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if (trexio_rc == check_rc) then
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if (present(success_message)) write(*,*) success_message
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else
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call trexio_string_of_error(trexio_rc, str)
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print *, trim(str)
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call exit(1)
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endif
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end subroutine trexio_assert
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#+end_src
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* File suffixes :noexport:
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#+begin_src c :tangle suffix_front.h
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