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!***********************************************************************
! plplot_single.f90
!
! Copyright (C) 2005-2016 Arjen Markus
! Copyright (C) 2006-2016 Alan W. Irwin
!
! This file is part of PLplot.
!
! PLplot is free software; you can redistribute it and/or modify
! it under the terms of the GNU Library General Public License as published
! by the Free Software Foundation; either version 2 of the License, or
! (at your option) any later version.
!
! PLplot is distributed in the hope that it will be useful,
! but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! GNU Library General Public License for more details.
!
! You should have received a copy of the GNU Library General Public License
! along with PLplot; if not, write to the Free Software
! Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
!
!
!***********************************************************************
module plplot_single
use iso_c_binding, only: c_ptr, c_char, c_null_char, c_null_ptr, c_loc, c_funptr, c_null_funptr, c_funloc, &
c_associated
use iso_fortran_env, only: error_unit
use plplot_types, only: private_plflt, private_plint, private_plbool, private_single, PLcGrid, PLfGrid
use plplot_private_exposed
use plplot_private_utilities, only: character_array_to_c
implicit none
integer, parameter :: wp = private_single
private :: c_ptr, c_char, c_null_char, c_null_ptr, c_loc, c_funptr, c_null_funptr, c_funloc
private :: error_unit
private :: private_plflt, private_plint, private_plbool, private_single, PLcGrid, PLfGrid
private :: character_array_to_c
private :: wp
! Private interfaces for wp-precision callbacks
private :: plmapformf2c, pllabelerf2c, pllabelerf2c_data, pltransformf2c, pltransformf2c_data
include 'included_plplot_real_interfaces.f90'
! plflt-precision callback routines that are called from C and which wrap a call to wp-precision Fortran routines.
subroutine plmapformf2c( n, x, y ) bind(c, name = 'plplot_single_private_plmapformf2c')
integer(kind=private_plint), value, intent(in) :: n
real(kind=private_plflt), dimension(n), intent(inout) :: x, y
real(kind=wp), dimension(:), allocatable :: x_inout, y_inout
allocate(x_inout(n), y_inout(n))
x_inout = real(x, kind=wp)
y_inout = real(y, kind=wp)
call plmapform( x_inout, y_inout )
x = real(x_inout, kind=private_plflt)
y = real(y_inout, kind=private_plflt)
end subroutine plmapformf2c
subroutine pllabelerf2c( axis, value, label, length, data ) bind(c, name = 'plplot_single_private_pllabelerf2c')
integer(kind=private_plint), value, intent(in) :: axis, length
real(kind=private_plflt), value, intent(in) :: value
character(len=1), dimension(*), intent(out) :: label
type(c_ptr), value, intent(in) :: data
character(len=:), allocatable :: label_out
integer :: trimmed_length
if ( c_associated(data) ) then
write(*,*) 'PLPlot: error in pllabelerf2c - data argument should be NULL'
stop
endif
allocate(character(length) :: label_out)
call pllabeler( int(axis), real(value,kind=wp), label_out )
trimmed_length = min(length,len_trim(label_out) + 1)
label(1:trimmed_length) = transfer(trim(label_out(1:length))//c_null_char, " ", trimmed_length)
deallocate(label_out)
end subroutine pllabelerf2c
subroutine pllabelerf2c_data( axis, value, label, length, data ) bind(c, name = 'plplot_single_private_pllabelerf2c_data')
integer(kind=private_plint), value, intent(in) :: axis, length
real(kind=private_plflt), value, intent(in) :: value
character(len=1), dimension(*), intent(out) :: label
type(c_ptr), value, intent(in) :: data
character(len=:), allocatable :: label_out
integer :: trimmed_length
allocate(character(length) :: label_out)
call pllabeler_data( int(axis), real(value,kind=wp), label_out, data )
trimmed_length = min(length,len_trim(label_out) + 1)
label(1:trimmed_length) = transfer(trim(label_out(1:length))//c_null_char, " ", trimmed_length)
deallocate(label_out)
end subroutine pllabelerf2c_data
subroutine pltransformf2c( x, y, tx, ty, data ) bind(c, name = 'plplot_single_private_pltransformf2c')
real(kind=private_plflt), value, intent(in) :: x, y
real(kind=private_plflt), intent(out) :: tx, ty
type(c_ptr), value, intent(in) :: data
real(kind=wp) :: tx_out, ty_out
if ( c_associated(data) ) then
write(*,*) 'PLPlot: error in pltransfrom2c - data argument should be NULL'
stop
endif
call pltransform( real(x,kind=wp), real(y,kind=wp), tx_out, ty_out )
tx = tx_out
ty = ty_out
end subroutine pltransformf2c
subroutine pltransformf2c_data( x, y, tx, ty, data ) bind(c, name = 'plplot_single_private_pltransformf2c_data')
real(kind=private_plflt), value, intent(in) :: x, y
real(kind=private_plflt), intent(out) :: tx, ty
type(c_ptr), value, intent(in) :: data
real(kind=wp) :: tx_out, ty_out
call pltransform_data( real(x,kind=wp), real(y,kind=wp), tx_out, ty_out, data )
tx = tx_out
ty = ty_out
end subroutine pltransformf2c_data
end module plplot_single
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