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! Copyright (c) 2022 Approximatrix, LLC <support@approximatrix.com>
!
! Permission is hereby granted, free of charge, to any person obtaining a copy
! of this software and associated documentation files (the "Software"), to deal
! in the Software without restriction, including without limitation the rights
! to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
! copies of the Software, and to permit persons to whom the Software is
! furnished to do so, subject to the following conditions:
!
! The above copyright notice and this permission notice shall be included in
! all copies or substantial portions of the Software.
!
! The Software shall be used for Good, not Evil.
!
! THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
! IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
! FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
! AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
! LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
! OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
! SOFTWARE.

module fpoint_fsutil
implicit none

#ifdef __WIN32__
    character, parameter::pathsep = '\'
#else
    character, parameter::pathsep = '/'
#endif

contains

    subroutine append_to_path(path, additive)
    implicit none
    
        character(len=*), intent(inout)::path
        character(len=*), intent(in)::additive
        integer::istart
        
        if(path(len_trim(path):len_trim(path)) /= pathsep) then
            path = trim(path)//pathsep
        end if
        
        istart = 1
        if(additive(1:1) == pathsep) then
            istart = 2
        end if
        
        path = trim(path)//additive(istart:len_trim(additive))
        
    end subroutine append_to_path
    
    subroutine get_temporary_directory(dir)
    implicit none
    
        character(len=*), intent(out)::dir
        
        call get_environment_variable("TEMP", dir)
        
    end subroutine get_temporary_directory
    
    subroutine make_directory(dir)
    use iso_c_binding
    implicit none
    
        character(len=*), intent(in)::dir

#ifdef __WIN32__
        character(len=:, kind=c_char), pointer::cdir
        interface
            subroutine make_dir(str) bind(c, name="make_directory_on_windows")
            use iso_c_binding
            type(c_ptr), value::str
            end subroutine make_dir
        end interface
        
        allocate(character(len=(len_trim(dir)+1))::cdir)
        cdir = trim(dir)//c_null_char
        call make_dir(c_loc(cdir))
        deallocate(cdir)  
#else
        call execute_command_line('mkdir "'//trim(dir)//'"', wait=.true.)
#endif
    
    end subroutine make_directory

end module fpoint_fsutil