noesc(3f) - [M_strings:NONALPHA] convert non-printable characters
to a space
(LICENSE:PD)
elemental function noesc(INSTR)
character(len=*),intent(in) :: INSTR
character(len=len(instr)) :: noesc
Convert non-printable characters to a space.
Sample Program:
program demo_noesc
use M_strings, only : noesc
implicit none
character(len=128) :: ascii
character(len=128) :: cleared
integer :: i
! fill variable with base ASCII character set
do i=1,128
ascii(i:i)=char(i-1)
enddo
cleared=noesc(ascii)
write(*,*)'characters and their ADE (ASCII Decimal Equivalent)'
call ade(ascii)
write(*,*)'Cleared of non-printable characters'
call ade(cleared)
write(*,*)'Cleared string:'
write(*,*)cleared
contains
subroutine ade(string)
implicit none
! the string to print
character(len=*),intent(in) :: string
! number of characters in string to print
integer :: lgth
! counter used to step thru string
integer :: i
! get trimmed length of input string
lgth=len_trim(string(:len(string)))
! replace lower unprintable characters with spaces
write(*,101)(merge(string(i:i),' ',&
& iachar(string(i:i)) >= 32 &
& .and. &
& iachar(string(i:i)) <= 126) &
& ,i=1,lgth)
! print ADE value of character underneath it
write(*,202) (iachar(string(i:i))/100, i=1,lgth)
write(*,202)(mod( iachar(string(i:i)),100)/10,i=1,lgth)
write(*,202)(mod((iachar(string(i:i))),10), i=1,lgth)
! format for printing string characters
101 format(*(a1:))
! format for printing ADE values
202 format(*(i1:))
end subroutine ade
end program demo_noesc
Expected output
The string is printed with the ADE value vertically beneath.
The original string has all the ADEs from 000 to 127. After
NOESC(3f) is called on the string all the "non-printable"
characters are replaced with a space (ADE of 032).
characters and their ADE (ASCII Decimal Equivalent)
> !"#$%&'()*+,-./0123456789
:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
>0000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000001111111111111111111111111111
>00000000001111111111222222222233333333334444444444555555555566666666
667777777777888888888899999999990000000000111111111122222222
>012345678901234567890123456789012345678901234567890123456789012345678
90123456789012345678901234567890123456789012345678901234567
Cleared of non-printable characters
> !"#$%&'()*+,-./0123456789
:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
>0000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000111111111111111111111111111
>3333333333333333333333333333333333333333444444444455555555
556666666666777777777788888888889999999999000000000011111111112222222
>2222222222222222222222222222222223456789012345678901234567
890123456789012345678901234567890123456789012345678901234567890123456
Cleared string:
> !"#$%&'()*+,-./0123456789:;<=>?@
ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
John S. Urban
Public Domain
Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
character(len=*), | intent(in) | :: | INSTR |
elemental function noesc(INSTR)
! ident_48="@(#) M_strings noesc(3f) convert non-printable characters to a space"
character(len=*),intent(in) :: INSTR ! string that might contain nonprintable characters
character(len=len(instr)) :: noesc
integer :: ic,i10
!-----------------------------------------------------------------------------------------------------------------------------------
noesc='' ! initialize output string
do i10=1,len_trim(INSTR(1:len(INSTR)))
ic=iachar(INSTR(i10:i10))
if(ic <= 31.or.ic == 127)then ! find characters with ADE of 0-31, 127
noesc(I10:I10)=' ' ! replace non-printable characters with a space
else
noesc(I10:I10)=INSTR(i10:i10) ! copy other characters as-is from input string to output string
endif
enddo
end function noesc