iscntrl Function

public elemental function iscntrl(ch) result(res)

NAME

 iscntrl(3f) - [M_strings:COMPARE] returns .true. if character is a
 delete character or ordinary control character
 (LICENSE:PD)

SYNOPSIS

elemental function iscntrl(onechar)

 character,intent(in) :: onechar
 logical              :: iscntrl

DESCRIPTION

 iscntrl(3f) returns .true. if character is a delete character or
 ordinary control character

OPTIONS

onechar  character to test

RETURNS

iscntrl  logical value returns true if character is a control character

EXAMPLE

Sample program

 program demo_iscntrl
 use M_strings, only : iscntrl
 implicit none
 integer                    :: i
 character(len=1),parameter :: string(*)=[(char(i),i=0,127)]
    write(*,'(20(g0,1x))')'ISCNTRL: ', &
    & iachar(pack( string, iscntrl(string) ))
 end program demo_iscntrl

Results:

ISCNTRL:  0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 127

AUTHOR

 John S. Urban

LICENSE

 Public Domain

Arguments

Type IntentOptional Attributes Name
character, intent(in) :: ch

Return Value logical


Contents

Source Code

iscntrl

Source Code

elemental function iscntrl(ch) result(res)

! ident_73="@(#) M_strings iscntrl(3f) true if a delete or ordinary control character(0x7F or 0x00-0x1F)"

character,intent(in) :: ch
logical              :: res
   select case(ch)
   case(char(127),char(0):char(31))
     res=.true.
   case default
     res=.false.
   end select
end function iscntrl