remove pre-processor flags

Author: wassup05

example/system/example_path_base_name.f90

@@ -1,9 +1,9 @@
 ! Usage of base_name
 program example_path_base_name
-    use stdlib_system, only: base_name, ISWIN
+    use stdlib_system, only: base_name, OS_TYPE, OS_WINDOWS
     character(len=:), allocatable :: p1
 
-    if( ISWIN ) then
+    if(OS_TYPE() == OS_WINDOWS) then
         p1 = 'C:\Users'
     else
         p1 = '/home'

example/system/example_path_dir_name.f90

@@ -1,9 +1,9 @@
 ! Usage of dir_name
 program example_path_dir_name
-    use stdlib_system, only: dir_name, ISWIN
+    use stdlib_system, only: dir_name, OS_TYPE, OS_WINDOWS
     character(len=:), allocatable :: p1, head, tail
 
-    if( ISWIN ) then
+    if(OS_TYPE() == OS_WINDOWS) then
         p1 = 'C:\Users' ! C:\Users
     else
         p1 = '/home' ! /home

example/system/example_path_join.f90

@@ -1,10 +1,10 @@
 ! Usage of join_path, operator(/)
 program example_path_join
-    use stdlib_system, only: join_path, operator(/), ISWIN
+    use stdlib_system, only: join_path, operator(/), OS_TYPE, OS_WINDOWS
     character(len=:), allocatable :: p1, p2, p3
     character(len=20) :: parr(4)
 
-    if( ISWIN ) then
+    if(OS_TYPE() == OS_WINDOWS) then
         p1 = 'C:'/'Users'/'User1'/'Desktop'
         p2 = join_path('C:\Users\User1', 'Desktop')
         parr = [character(len=20) :: 'C:', 'Users', 'User1', 'Desktop']

example/system/example_path_split_path.f90

@@ -1,9 +1,9 @@
 ! Usage of split_path
 program example_path_split_path
-    use stdlib_system, only: join_path, split_path, ISWIN
+    use stdlib_system, only: join_path, split_path, OS_TYPE, OS_WINDOWS
     character(len=:), allocatable :: p1, head, tail
 
-    if( ISWIN ) then
+    if(OS_TYPE() == OS_WINDOWS) then
         p1 = join_path('C:\Users\User1', 'Desktop') ! C:\Users\User1\Desktop
     else
         p1 = join_path('/home/User1', 'Desktop') ! /home/User1/Desktop

src/stdlib_system.F90

@@ -85,14 +85,7 @@ module stdlib_system
 public :: is_windows
 
 !! Public path related functions and interfaces
-#ifdef WINDOWS
-    character(len=1), parameter, public :: pathsep = '\'
-    logical, parameter, public :: ISWIN = .true.
-#else
-    character(len=1), parameter, public :: pathsep = '/'
-    logical, parameter, public :: ISWIN = .false.
-#endif
-
+public :: path_sep
 public :: join_path
 public :: operator(/)
 public :: split_path
@@ -572,12 +565,12 @@ end function process_get_ID
     !! join the paths provided according to the OS-specific path-separator
     !! ([Specification](../page/specs/stdlib_system.html#join_path))
     !!
-    module pure function join2(p1, p2) result(path)
+    module function join2(p1, p2) result(path)
         character(:), allocatable :: path
         character(*), intent(in) :: p1, p2
     end function join2
 
-    module pure function joinarr(p) result(path)
+    module function joinarr(p) result(path)
         character(:), allocatable :: path
         character(*), intent(in) :: p(:)
     end function joinarr
@@ -590,7 +583,7 @@ end function joinarr
     !! A binary operator to join the paths provided according to the OS-specific path-separator
     !! ([Specification](../page/specs/stdlib_system.html#operator(/)))
     !!
-    module pure function join_op(p1, p2) result(path)
+    module function join_op(p1, p2) result(path)
         character(:), allocatable :: path
         character(*), intent(in) :: p1, p2
     end function join_op
@@ -866,4 +859,12 @@ subroutine delete_file(path, err)
     end if
 end subroutine delete_file
 
+character function path_sep()
+    if (OS_TYPE() == OS_WINDOWS) then
+        path_sep = '\'
+    else
+        path_sep = '/'
+    end if
+end function path_sep
+
 end module stdlib_system

src/stdlib_system_path.f90

@@ -2,21 +2,21 @@
     use stdlib_ascii, only: reverse
     use stdlib_strings, only: chomp, find, join
 contains
-    module pure function join2(p1, p2) result(path)
+    module function join2(p1, p2) result(path)
         character(:), allocatable :: path
         character(*), intent(in) :: p1, p2
 
-        path = trim(p1) // pathsep // trim(p2)
+        path = trim(p1) // path_sep() // trim(p2)
     end function join2
 
-    module pure function joinarr(p) result(path)
+    module function joinarr(p) result(path)
         character(:), allocatable :: path
         character(*), intent(in) :: p(:)
 
-        path = join(p, pathsep)
+        path = join(p, path_sep())
     end function joinarr
 
-    module pure function join_op(p1, p2) result(path)
+    module function join_op(p1, p2) result(path)
         character(:), allocatable :: path
         character(*), intent(in) :: p1, p2
 
@@ -28,6 +28,8 @@ module subroutine split_path(p, head, tail)
         character(:), allocatable, intent(out) :: head, tail
         character(:), allocatable :: temp
         integer :: i
+        character(len=1) :: sep
+        sep = path_sep()
 
         ! Empty string, return (.,'')
         if (trim(p) == '') then
@@ -37,28 +39,28 @@ module subroutine split_path(p, head, tail)
         end if
 
         ! Remove trailing path separators
-        temp = trim(chomp(trim(p), pathsep))
+        temp = trim(chomp(trim(p), sep))
 
         if (temp == '') then
-            head = pathsep
+            head = sep
             tail = ''
             return
         end if
 
-        i = find(reverse(temp), pathsep)
+        i = find(reverse(temp), sep)
 
         ! if no `pathsep`, then it probably was a root dir like `C:\`
         if (i == 0) then
-            head = temp // pathsep
+            head = temp // sep
             tail = ''
             return
         end if
 
         head = temp(:len(temp)-i)
 
         ! child of a root directory
-        if (find(head, pathsep) == 0) then
-            head = head // pathsep
+        if (find(head, sep) == 0) then
+            head = head // sep
         end if
 
         tail = temp(len(temp)-i+2:)

test/system/test_path.f90

@@ -1,6 +1,6 @@
 module test_path
     use testdrive, only : new_unittest, unittest_type, error_type, check, skip_test
-    use stdlib_system, only: join_path, operator(/), split_path, ISWIN
+    use stdlib_system, only: join_path, operator(/), split_path, OS_TYPE, OS_WINDOWS
     implicit none
 contains
     !> Collect all exported unit tests
@@ -32,7 +32,7 @@ subroutine test_join_path(error)
         character(len=:), allocatable :: path
         character(len=20) :: paths(5)
 
-        if (ISWIN) then
+        if (OS_TYPE() == OS_WINDOWS) then
             path = join_path('C:\Users', 'Alice')
             call checkpath(error, 'join_path', 'C:\Users\Alice', path)
             if (allocated(error)) return
@@ -64,7 +64,7 @@ subroutine test_join_path_op(error)
         type(error_type), allocatable, intent(out) :: error
         character(len=:), allocatable :: path
 
-        if (ISWIN) then
+        if (OS_TYPE() == OS_WINDOWS) then
             path = 'C:'/'Users'/'Alice'/'Desktop'
             call checkpath(error, 'join_path operator', 'C:\Users\Alice\Desktop', path)
             if (allocated(error)) return
@@ -85,7 +85,7 @@ subroutine test_split_path(error)
         call checkpath(error, 'split_path-tail', '', tail)
         if (allocated(error)) return
 
-        if (ISWIN) then
+        if (OS_TYPE() == OS_WINDOWS) then
             call split_path('\\\\', head, tail)
             call checkpath(error, 'split_path-head', '\', head)
             if (allocated(error)) return