Use getline from stdlib_io (#34)

Author: awvwgk

pages/tutorial/dependencies.md

@@ -32,10 +32,6 @@ The implementation is shown here
 :caption: src/demo.f90
 ```
 
-:::{note}
-To work with deferred length characters we added a small helper function to read a whole line.
-:::
-
 Finally, we need a command line driver to make use of our new function.
 
 ```{code-block} fortran

src/tutorial/dependencies/src/demo.f90

@@ -1,10 +1,10 @@
 module demo
+  use stdlib_io, only : getline
   use stdlib_strings, only : replace_all
   implicit none
   private
 
   public :: substitute
-  public :: getline
 
 contains
 
@@ -29,34 +29,4 @@ subroutine substitute(input, output, pattern, replacement)
     end do
   end subroutine substitute
 
-  !> Read a whole line from a formatted unit into a deferred length character variable
-  subroutine getline(unit, line, iostat, iomsg)
-    !> Formatted IO unit
-    integer, intent(in) :: unit
-    !> Line to read
-    character(len=:), allocatable, intent(out) :: line
-    !> Status of operation
-    integer, intent(out) :: iostat
-    !> Error message
-    character(len=:), allocatable, optional :: iomsg
-
-    integer, parameter :: bufsize = 512
-    character(len=bufsize) :: buffer, msg
-    integer :: chunk, stat
-
-    allocate(character(len=0) :: line)
-    do
-      read(unit, '(a)', advance='no', iostat=stat, iomsg=msg, size=chunk) buffer
-      if (stat > 0) exit
-      line = line // buffer(:chunk)
-      if (stat < 0) then
-        if (is_iostat_eor(stat)) stat = 0
-        exit
-      end if
-    end do
-
-    if (stat /= 0 .and. present(iomsg)) iomsg = trim(msg)
-    iostat = stat
-  end subroutine getline
-
 end module demo

src/tutorial/dependencies/test/main.f90

@@ -1,5 +1,6 @@
 module test_demo
-  use demo, only : substitute, getline
+  use demo, only : substitute
+  use stdlib_io, only : getline
   use testdrive, only : error_type, unittest_type, new_unittest, check
   implicit none
   private