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lazutils: simplified

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git-svn-id: trunk@56163 -
This commit is contained in:
mattias 2017-10-23 09:35:35 +00:00
parent f9cb151061
commit 90dd28d142
1 changed files with 8 additions and 5 deletions
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13
components/lazutils/lazutf8.pas
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@ -887,24 +887,27 @@ begin
end;
function UTF8CharacterStrictLength(P: PChar): integer;
var
c: Char;
begin
if p=nil then exit(0);
if ord(p^)<%10000000 then begin
c:=p^;
if ord(c)<%10000000 then begin
// regular single byte character
exit(1);
end
else if ord(p^)<%11000000 then begin
else if ord(c)<%11000000 then begin
// invalid single byte character
exit(0);
end
else if ((ord(p^) and %11100000) = %11000000) then begin
else if ((ord(c) and %11100000) = %11000000) then begin
// should be 2 byte character
if (ord(p[1]) and %11000000) = %10000000 then
exit(2)
else
exit(0);
end
else if ((ord(p^) and %11110000) = %11100000) then begin
else if ((ord(c) and %11110000) = %11100000) then begin
// should be 3 byte character
if ((ord(p[1]) and %11000000) = %10000000)
and ((ord(p[2]) and %11000000) = %10000000) then
@ -912,7 +915,7 @@ begin
else
exit(0);
end
else if ((ord(p^) and %11111000) = %11110000) then begin
else if ((ord(c) and %11111000) = %11110000) then begin
// should be 4 byte character
if ((ord(p[1]) and %11000000) = %10000000)
and ((ord(p[2]) and %11000000) = %10000000)