142 lines
3.4 KiB
Plaintext
142 lines
3.4 KiB
Plaintext
library cdejecter;
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{$mode delphi}
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{$codepage UTF8}
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uses Interfaces, Classes, LazUTF8Classes, sysutils, cde_types, windows, mmsystem, LazFileUtils;
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{$R *.res}
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function GetCDDiscs: PWideChar;
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var i, j : Integer;
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Buf : array [0..95] of Char;
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SL: TStringListUTF8;
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begin
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GetLogicalDriveStrings(96, Buf);
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for j:=0 to 25 do
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if Buf[j*4+2] <> #92 then
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Break;
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SL:= TStringListUTF8.Create;
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for i:=0 to j-1 do
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begin
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if GetDriveType(@Buf[i*4])= DRIVE_CDROM then
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SL.Add(AnsiLowerCase(String(Buf[i*4])) + ':\');
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end;
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SL.Delimiter:= ';';
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Result:= PWideChar(SL.DelimitedText);
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SL.Clear;
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SL.Free;
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end;
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function GetDiscState (const ADisc: WideChar): TDiscState;
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var sRec: TSearchRec;
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res: Integer;
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begin
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Result:= dsNIL;
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SetErrorMode(SEM_FAILCRITICALERRORS);
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{$I-}
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res:= FindFirstUTF8(ADisc + ':\*.*', faAnyfile, SRec);
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FindCloseUTF8(SRec);
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{$I+}
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case res of
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0: Result:= dsNormal;
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2,18: Result:= dsEmpty;
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21,3: Result:= dsNIL;
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else
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Result:= dsUnFormatted;
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end;
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end;
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function GetVolumeInfo (const ADisc: WideChar): TDiscInfo;
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var root: PChar;
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res: LongBool;
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VolumeNameBuffer, FileSystemNameBuffer: PChar;
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VolumeNameSize,FileSystemNameSize: DWORD;
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VolumeSerialNumber, MaximumComponentLength, FileSystemFlags: DWORD;
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s: String;
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begin
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s:= ADisc + ':\';
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root:= PChar(s);
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GetMem(VolumeNameBuffer, 256);
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Getmem(FileSystemNameBuffer, 256);
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VolumeNameSize:= 255;
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FileSystemNameSize:= 255;
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res:= GetVolumeInformation(Root, VolumeNameBuffer, VolumeNameSize, @VolumeSerialNumber, MaximumComponentLength, FileSystemFlags, FileSystemNameBuffer, FileSystemNameSize);
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with Result do
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begin
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diHasInfo:= res;
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diDrive:= ADisc;
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diVolumeName:= VolumeNameBuffer;
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diFileSystem:= FileSystemNameBuffer;
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diSerial:= VolumeSerialNumber;
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end;
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Freemem(VolumeNameBuffer, 256);
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Freemem(FileSystemNameBuffer, 256);
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end;
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function EjectCD (const ADisc: WideChar): Boolean;
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var Res: MciError;
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OpenParm: TMCI_Open_Parms;
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Flags: DWord;
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S: String;
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DeviceID: Word;
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begin
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Result:= False;
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if ADisc = '' then
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Abort;
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S:= ADisc + ':';
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if (GetDriveType(PChar(S)) = DRIVE_CDROM) and (GetDiscState(ADisc) <> dsNIL) then
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begin
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Flags:= mci_Open_Type or mci_Open_Element;
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with OpenParm do
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begin
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dwCallback:= 0;
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lpstrDeviceType:= 'CDAudio';
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lpstrElementName:= PChar(S);
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end;
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Res:= mciSendCommand(0, mci_Open, Flags, Longint(@OpenParm));
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if Res <> 0 then
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Exit;
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DeviceID:= OpenParm.wDeviceID;
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try
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Res:= mciSendCommand(DeviceID, MCI_SET, MCI_SET_DOOR_OPEN, 0);
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if Res = 0 then
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Exit;
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Result:= True;
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finally
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mciSendCommand(DeviceID, mci_Close, Flags, Longint(@OpenParm));
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end;
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end;
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end;
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function CloseCD (const ADisc: WideChar): Boolean;
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var Res: MciError;
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OpenParm: TMCI_Open_Parms;
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Flags: DWord;
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S: String;
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DeviceID: Word;
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begin
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Result:= False;
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if ADisc = '' then
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Abort;
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S:= ADisc + ':';
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if (GetDriveType(PChar(S)) = DRIVE_CDROM) and (GetDiscState(ADisc) <> dsNIL) then
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begin
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Flags:= mci_Open_Type or mci_Open_Element;
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with OpenParm do
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begin
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dwCallback:= 0;
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lpstrDeviceType:= 'CDAudio';
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lpstrElementName:= PChar(S);
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end;
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Res:= mciSendCommand(0, mci_Open, Flags, Longint(@OpenParm));
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if Res <> 0 then
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Exit;
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DeviceID:= OpenParm.wDeviceID;
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try
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Res:= mciSendCommand(DeviceID, MCI_SET, MCI_SET_DOOR_CLOSED, 0);
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if Res = 0 then
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Exit;
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Result:= True;
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finally
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mciSendCommand(DeviceID, mci_Close, Flags, Longint(@OpenParm));
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end;
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end;
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end;
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exports GetCDDiscs, GetDiscState, GetVolumeInfo, EjectCD;
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begin
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end.
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