visible Function

public function visible(input) result(output)

NAME

visible(3f) - [M_strings:NONALPHA] expand a string to control and
meta-control representations
(LICENSE:PD)

SYNOPSIS

function visible(input) result(output)

 character(len=*),intent(in)           :: input
 character(len=:),allocatable          :: output

DESCRIPTION

 visible(3f) expands characters to commonly used sequences used
 to represent the characters as control sequences or meta-control
 sequences.

EXAMPLES

Sample Program:

 program demo_visible
 use M_strings, only : visible
 integer :: i
    do i=0,255
       write(*,'(i0,1x,a)')i,visible(char(i))
    enddo
 end program demo_visible

BUGS

 The expansion is not reversible, as input sequences such as "M-" or
 "^a" will look like expanded sequences.

AUTHOR

John S. Urban

LICENSE

Public Domain

Arguments

Type IntentOptional Attributes Name
character(len=*), intent(in) :: input

Return Value character(len=:), allocatable


Contents

Source Code

visible

Source Code

function visible(input) result(output)
character(len=*),intent(in)  :: input
character(len=:),allocatable :: output

! ident_30="@(#) M_strings visible(3f) expand escape sequences in a string to control and meta-control representations"

integer                      :: i
character(len=1)             :: c

character(len=*),parameter :: chars(0:255)= [ &
'^@  ', '^A  ', '^B  ', '^C  ', '^D  ', '^E  ', '^F  ', '^G  ', '^H  ', '^I  ', &
'^J  ', '^K  ', '^L  ', '^M  ', '^N  ', '^O  ', '^P  ', '^Q  ', '^R  ', '^S  ', &
'^T  ', '^U  ', '^V  ', '^W  ', '^X  ', '^Y  ', '^Z  ', '^[  ', '^\  ', '^]  ', &
'^^  ', '^_  ', '    ', '!   ', '"   ', '#   ', '$   ', '%   ', '&   ', '''   ', &
'(   ', ')   ', '*   ', '+   ', ',   ', '-   ', '.   ', '/   ', '0   ', '1   ', &
'2   ', '3   ', '4   ', '5   ', '6   ', '7   ', '8   ', '9   ', ':   ', ';   ', &
'<   ', '=   ', '>   ', '?   ', '@   ', 'A   ', 'B   ', 'C   ', 'D   ', 'E   ', &
'F   ', 'G   ', 'H   ', 'I   ', 'J   ', 'K   ', 'L   ', 'M   ', 'N   ', 'O   ', &
'P   ', 'Q   ', 'R   ', 'S   ', 'T   ', 'U   ', 'V   ', 'W   ', 'X   ', 'Y   ', &
'Z   ', '[   ', '\   ', ']   ', '^   ', '_   ', '`   ', 'a   ', 'b   ', 'c   ', &
'd   ', 'e   ', 'f   ', 'g   ', 'h   ', 'i   ', 'j   ', 'k   ', 'l   ', 'm   ', &
'n   ', 'o   ', 'p   ', 'q   ', 'r   ', 's   ', 't   ', 'u   ', 'v   ', 'w   ', &
'x   ', 'y   ', 'z   ', '{   ', '|   ', '}   ', '~   ', '^?  ', 'M-^@', 'M-^A', &
'M-^B', 'M-^C', 'M-^D', 'M-^E', 'M-^F', 'M-^G', 'M-^H', 'M-^I', 'M-^J', 'M-^K', &
'M-^L', 'M-^M', 'M-^N', 'M-^O', 'M-^P', 'M-^Q', 'M-^R', 'M-^S', 'M-^T', 'M-^U', &
'M-^V', 'M-^W', 'M-^X', 'M-^Y', 'M-^Z', 'M-^[', 'M-^\', 'M-^]', 'M-^^', 'M-^_', &
'M-  ', 'M-! ', 'M-" ', 'M-# ', 'M-$ ', 'M-% ', 'M-& ', 'M-'' ', 'M-( ', 'M-) ', &
'M-* ', 'M-+ ', 'M-, ', 'M-- ', 'M-. ', 'M-/ ', 'M-0 ', 'M-1 ', 'M-2 ', 'M-3 ', &
'M-4 ', 'M-5 ', 'M-6 ', 'M-7 ', 'M-8 ', 'M-9 ', 'M-: ', 'M-; ', 'M-< ', 'M-= ', &
'M-> ', 'M-? ', 'M-@ ', 'M-A ', 'M-B ', 'M-C ', 'M-D ', 'M-E ', 'M-F ', 'M-G ', &
'M-H ', 'M-I ', 'M-J ', 'M-K ', 'M-L ', 'M-M ', 'M-N ', 'M-O ', 'M-P ', 'M-Q ', &
'M-R ', 'M-S ', 'M-T ', 'M-U ', 'M-V ', 'M-W ', 'M-X ', 'M-Y ', 'M-Z ', 'M-[ ', &
'M-\ ', 'M-] ', 'M-^ ', 'M-_ ', 'M-` ', 'M-a ', 'M-b ', 'M-c ', 'M-d ', 'M-e ', &
'M-f ', 'M-g ', 'M-h ', 'M-i ', 'M-j ', 'M-k ', 'M-l ', 'M-m ', 'M-n ', 'M-o ', &
'M-p ', 'M-q ', 'M-r ', 'M-s ', 'M-t ', 'M-u ', 'M-v ', 'M-w ', 'M-x ', 'M-y ', &
'M-z ', 'M-{ ', 'M-| ', 'M-} ', 'M-~ ', 'M-^?']
output=''
do i=1,len(input)
   c=input(i:i)
   if(c == ' ')then
      output=output//' '
   else
      output=output//trim(chars(iachar(c)))
   endif
enddo
end function visible