2008-02-29 20:47:04 +03:00
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{utf8}
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2007-08-29 13:16:31 +04:00
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function DecodeErrNo(ErrNo: DWord): Word;
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2008-02-29 20:47:04 +03:00
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{0 = успешно
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1 = не определена база и/или раздел жёсткого диска (подфункциями 7, 8 функции 21)
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2 = функция не поддерживается для данной файловой системы
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3 = неизвестная файловая система
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4 = зарезервировано, никогда не возвращается в текущей реализации
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5 = файл не найден
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6 = файл закончился
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7 = указатель вне памяти приложения
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8 = диск заполнен
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9 = таблица FAT разрушена
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10 = доступ запрещён
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11 = ошибка устройства}
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2007-08-29 13:16:31 +04:00
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begin
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case ErrNo of
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0: Result := 0;
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1: Result := 152;
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2: Result := 153;
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3: Result := 151;
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4: Result := 1;
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5: Result := 2;
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6: Result := 0;
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8: Result := 101;
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else
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2008-02-29 20:47:04 +03:00
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Result := 153; { Unknown command (неизвестная команда) }
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2007-08-29 13:16:31 +04:00
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end;
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end;
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function do_isdevice(handle:thandle): Boolean;
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begin
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InOutRes := 211;
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Result := False;
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end;
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procedure do_close(handle: THandle);
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begin
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FreeMem(PKosFile(handle));
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InOutRes := 0;
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end;
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procedure do_erase(p : pchar);
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begin
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InOutRes := 211;
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end;
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procedure do_rename(p1,p2 : pchar);
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begin
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InOutRes := 211;
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end;
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function do_write(handle: THandle; addr: Pointer; len: Longint): Longint;
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begin
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PKosFile(handle)^.Size := len;
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PKosFile(handle)^.Data := addr;
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InOutRes := DecodeErrNo(kos_writefile(PKosFile(handle), Result));
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Inc(PKosFile(handle)^.Position, Result);
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end;
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function do_read(handle: THandle; addr: Pointer; len: Longint): Longint;
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begin
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PKosFile(handle)^.Size := len;
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PKosFile(handle)^.Data := addr;
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InOutRes := DecodeErrNo(kos_readfile(PKosFile(handle), Result));
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Inc(PKosFile(handle)^.Position, Result);
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end;
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function do_filepos(handle: THandle): Int64;
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begin
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Result := PKosFile(handle)^.Position;
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end;
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procedure do_seek(handle: THandle; pos: Int64);
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begin
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PKosFile(handle)^.Position := pos;
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end;
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function do_seekend(handle: THandle): Int64;
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begin
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InOutRes := 211;
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Result := 0;
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end;
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function do_filesize(handle: THandle): Int64;
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var
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BDFE: TKosBDFE;
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begin
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PKosFile(handle)^.Data := @BDFE;
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InOutRes := DecodeErrNo(kos_fileinfo(PKosFile(handle)));
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Result := BDFE.Size;
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end;
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procedure do_truncate(handle: THandle; pos: Int64);
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begin
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InOutRes := 211;
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end;
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2008-02-29 20:47:04 +03:00
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{ FIXME: Поправить RTL, факт отсутствия файла не фиксируется при его открытии. }
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2007-08-29 13:16:31 +04:00
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procedure do_open(var f; p: PChar; flags: Longint);
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var
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KosFile: PKosFile;
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FilePath: PChar;
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FilePathLen: Longint;
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RecSize: Longint;
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CurrDir: array[0..2048] of Char;
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CurrDirLen: Longint;
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2008-02-29 20:47:04 +03:00
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Dummy: Longint;
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2007-08-29 13:16:31 +04:00
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begin
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case flags and 3 of
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0: FileRec(f).Mode := fmInput;
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1: FileRec(f).Mode := fmOutput;
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2: FileRec(f).Mode := fmInOut;
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end;
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2008-02-29 20:47:04 +03:00
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{Формирование имени абсолютного пути}
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2007-08-29 13:16:31 +04:00
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FilePathLen := Length(p);
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if p^ <> DirectorySeparator then
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begin
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2008-02-29 20:47:04 +03:00
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{XXX: размер буфера CurrDir может оказаться недостаточным}
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2007-08-29 13:16:31 +04:00
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CurrDirLen := kos_getdir(@CurrDir, SizeOf(CurrDir) - FilePathLen - 1) - 1;
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FilePath := @CurrDir;
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if FilePath[CurrDirLen - 1] <> DirectorySeparator then
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begin
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FilePath[CurrDirLen] := DirectorySeparator;
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Inc(CurrDirLen);
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end;
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Move(p^, FilePath[CurrDirLen], FilePathLen + 1);
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Inc(FilePathLen, CurrDirLen);
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end else
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FilePath := p;
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2008-02-29 20:47:04 +03:00
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{Создание структуры TKosFile}
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2007-08-29 13:16:31 +04:00
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RecSize := SizeOf(TKosFile) + FilePathLen;
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KosFile := GetMem(RecSize);
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FillChar(KosFile^, RecSize, 0);
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Move(FilePath^, KosFile^.Name, FilePathLen);
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FileRec(f).Handle := DWord(KosFile);
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if flags and $1000 <> 0 then
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begin
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2008-02-29 20:47:04 +03:00
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{ создать файл }
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2007-08-29 13:16:31 +04:00
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InOutRes := DecodeErrNo(kos_rewritefile(KosFile, RecSize));
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end else
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2008-02-29 20:47:04 +03:00
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begin
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{ попытаться прочитать файл }
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KosFile^.Size := 1;
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KosFile^.Data := @Dummy;
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InOutRes := DecodeErrNo(kos_readfile(KosFile, Dummy));
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end;
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if InOutRes <> 0 then
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2008-04-12 13:48:18 +04:00
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begin
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2008-02-29 20:47:04 +03:00
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FreeMem(KosFile);
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2008-04-12 13:48:18 +04:00
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FileRec(f).Handle := DWord(-1);
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end;
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2007-08-29 13:16:31 +04:00
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end;
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