VISIBLE characters from both the normal ASCII range 0 to 127 and also
form the 'extended ASCI' range 128 to 255 are in the following groups:
(see CaseNotes.txt)
Chrs
33 to 126
145 to 151
161 to 171
173 to 174
176 to 181
183 to 255
So, the simplest way to look for visible chars is to use a set variable
like this:
type
TVisibleChars = set of Char;
var
VisibleChars: TVisibleChars;
begin
VisibleChars := [Chr(33)..Chr(126),Chr(145)..Chr(151),Chr(161)..Chr(171),
Chr(173)..Chr(174),Chr(176)..Chr(181),Chr(183)..Chr(255)];
if (ch in VisibleChars) then doSomething;
end;
AND IF YOU'VE GOT AN ARRAY WITH ALL MANNER OF STUFF IN, INCLUDING CRs AND LFs
THAT WILL SCREW THINGS UP, THEN DECLARE YOUR SET VARIABLE AS ABOVE (BUT ADD
THE SPACE CHARACTER, number 32) AND THEN DO THIS...
y := 0;
for x := 0 to chunkSize do
begin
if (tempArray[i] in visibleChars) then
begin
visibleArray[y] := tempArray[x];
Inc(y);
end;
end;
visibleArray[y] := #0;