Записать файл в формате UTF-8

← →
snv-soft (2002-09-30 12:59) [0]

Мастера!
Возникла задача...
нужно сгенерировать файлик, содержащий русские буквы.
Выходной фал должен быть в формате UTF-8.
Как это сделать?
Спасибо.

← →
REA (2002-09-30 13:11) [1]

Из D6,D7 System.pas:

function Utf8Encode(const WS: WideString): UTF8String;
var
L: Integer;
Temp: UTF8String;
begin
Result := "";
if WS = "" then Exit;
SetLength(Temp, Length(WS) * 3); // SetLength includes space for null terminator

L := UnicodeToUtf8(PChar(Temp), Length(Temp)+1, PWideChar(WS), Length(WS));
if L > 0 then
SetLength(Temp, L-1)
else
Temp := "";
Result := Temp;
end;

function Utf8Decode(const S: UTF8String): WideString;
var
L: Integer;
Temp: WideString;
begin
Result := "";
if S = "" then Exit;
SetLength(Temp, Length(S));

L := Utf8ToUnicode(PWideChar(Temp), Length(Temp)+1, PChar(S), Length(S));
if L > 0 then
SetLength(Temp, L-1)
else
Temp := "";
Result := Temp;
end;

function Utf8ToUnicode(Dest: PWideChar; Source: PChar; MaxChars: Integer): Integer;
var
len: Cardinal;
begin
len := 0;
if Source <> nil then
while Source[len] <> #0 do
Inc(len);
Result := Utf8ToUnicode(Dest, MaxChars, Source, len);
end;

function Utf8ToUnicode(Dest: PWideChar; MaxDestChars: Cardinal; Source: PChar; SourceBytes: Cardinal): Cardinal;
var
i, count: Cardinal;
c: Byte;
wc: Cardinal;
begin
if Source = nil then
begin
Result := 0;
Exit;
end;
Result := Cardinal(-1);
count := 0;
i := 0;
if Dest <> nil then
begin
while (i < SourceBytes) and (count < MaxDestChars) do
begin
wc := Cardinal(Source[i]);
Inc(i);
if (wc and $80) <> 0 then
begin
if i >= SourceBytes then Exit; // incomplete multibyte char
wc := wc and $3F;
if (wc and $20) <> 0 then
begin
c := Byte(Source[i]);
Inc(i);
if (c and $C0) <> $80 then Exit; // malformed trail byte or out of range char
if i >= SourceBytes then Exit; // incomplete multibyte char
wc := (wc shl 6) or (c and $3F);
end;
c := Byte(Source[i]);
Inc(i);
if (c and $C0) <> $80 then Exit; // malformed trail byte

Dest[count] := WideChar((wc shl 6) or (c and $3F));
end
else
Dest[count] := WideChar(wc);
Inc(count);
end;
if count >= MaxDestChars then count := MaxDestChars-1;
Dest[count] := #0;
end
else
begin
while (i < SourceBytes) do
begin
c := Byte(Source[i]);
Inc(i);
if (c and $80) <> 0 then
begin
if i >= SourceBytes then Exit; // incomplete multibyte char
c := c and $3F;
if (c and $20) <> 0 then
begin
c := Byte(Source[i]);
Inc(i);
if (c and $C0) <> $80 then Exit; // malformed trail byte or out of range char
if i >= SourceBytes then Exit; // incomplete multibyte char
end;
c := Byte(Source[i]);
Inc(i);
if (c and $C0) <> $80 then Exit; // malformed trail byte
end;
Inc(count);
end;
end;
Result := count+1;
end;

ну и т.д.

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