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108 lines
3.2 KiB
108 lines
3.2 KiB
4 months ago
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!===-- module/iso_c_binding.f90 --------------------------------------------===!
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!
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! Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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! See https://llvm.org/LICENSE.txt for license information.
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! SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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!
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!===------------------------------------------------------------------------===!
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! See Fortran 2018, clause 18.2
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module iso_c_binding
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use __Fortran_builtins, only: &
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c_f_pointer => __builtin_c_f_pointer, &
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c_ptr => __builtin_c_ptr, &
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c_funptr => __builtin_c_funptr
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type(c_ptr), parameter :: c_null_ptr = c_ptr(0)
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type(c_funptr), parameter :: c_null_funptr = c_funptr(0)
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! Table 18.2 (in clause 18.3.1)
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! TODO: Specialize (via macros?) for alternative targets
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integer, parameter :: &
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c_int8_t = 1, &
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c_int16_t = 2, &
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c_int32_t = 4, &
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c_int64_t = 8, &
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c_int128_t = 16 ! anticipating future addition
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integer, parameter :: &
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c_int = c_int32_t, &
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c_short = c_int16_t, &
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c_long = c_int64_t, &
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c_long_long = c_int64_t, &
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c_signed_char = c_int8_t, &
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c_size_t = c_long_long, &
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c_intmax_t = c_int128_t, &
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c_intptr_t = c_size_t, &
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c_ptrdiff_t = c_size_t
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integer, parameter :: &
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c_int_least8_t = c_int8_t, &
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c_int_fast8_t = c_int8_t, &
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c_int_least16_t = c_int16_t, &
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c_int_fast16_t = c_int16_t, &
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c_int_least32_t = c_int32_t, &
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c_int_fast32_t = c_int32_t, &
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c_int_least64_t = c_int64_t, &
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c_int_fast64_t = c_int64_t, &
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c_int_least128_t = c_int128_t, &
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c_int_fast128_t = c_int128_t
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integer, parameter :: &
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c_float = 4, &
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c_double = 8, &
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#if __x86_64__
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c_long_double = 10
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#else
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c_long_double = 16
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#endif
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integer, parameter :: &
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c_float_complex = c_float, &
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c_double_complex = c_double, &
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c_long_double_complex = c_long_double
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integer, parameter :: c_bool = 1 ! TODO: or default LOGICAL?
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integer, parameter :: c_char = 1
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! C characters with special semantics
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character(kind=c_char, len=1), parameter :: c_null_char = achar(0)
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character(kind=c_char, len=1), parameter :: c_alert = achar(7)
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character(kind=c_char, len=1), parameter :: c_backspace = achar(8)
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character(kind=c_char, len=1), parameter :: c_form_feed = achar(12)
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character(kind=c_char, len=1), parameter :: c_new_line = achar(10)
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character(kind=c_char, len=1), parameter :: c_carriage_return = achar(13)
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character(kind=c_char, len=1), parameter :: c_horizontal_tab = achar(9)
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character(kind=c_char, len=1), parameter :: c_vertical_tab = achar(11)
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contains
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logical function c_associated(c_ptr_1, c_ptr_2)
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type(c_ptr), intent(in) :: c_ptr_1
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type(c_ptr), intent(in), optional :: c_ptr_2
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if (c_ptr_1%__address == c_null_ptr%__address) then
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c_associated = .false.
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else if (present(c_ptr_2)) then
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c_associated = c_ptr_1%__address == c_ptr_2%__address
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else
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c_associated = .true.
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end if
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end function c_associated
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function c_loc(x)
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type(c_ptr) :: c_loc
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type(*), dimension(..), intent(in) :: x
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c_loc = c_ptr(loc(x))
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end function c_loc
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function c_funloc(x)
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type(c_funptr) :: c_funloc
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external :: x
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c_funloc = c_funptr(loc(x))
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end function c_funloc
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! TODO c_f_procpointer
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! TODO c_sizeof
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end module iso_c_binding
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