IMPLEMENTATION MODULE Drectory;
(*
 *  REPERTOIRE
 *  Release 1.6
 *  By Charles Bradford and Cole Brecheen
 *  (c) Copyright 1985-1992 PMI
 *  Green Bay, Wisconsin
 *  All rights reserved
 *  (414) 468-6040
 *
 *  $Header:   D:/logfiles/mods/drectory.mov   1.8   17 Mar 1991 18:00:54   coleb  $
 *
 *)

IMPORT ByteFiddler;
IMPORT EnvironUtils;
IMPORT ErrorManager;
IMPORT HandleIO;
IMPORT LowLevel;
IMPORT M2Strings;
IMPORT Numbers;
IMPORT NumTypes;
IMPORT PosUtils;
IMPORT StrConv;
IMPORT StrEdit;
IMPORT StringIO;
IMPORT VStorage;

IMPORT FAPI;
IMPORT SYSTEM;

VAR
  Initialized : BOOLEAN;

  PROCEDURE Init();
    BEGIN
      IF Initialized THEN
        RETURN;
      ELSE
        Initialized := TRUE;
      END;
      ByteFiddler.Init();
      EnvironUtils.Init();
      ErrorManager.Init();
      HandleIO.Init();
      LowLevel.Init();
      M2Strings.Init();
      Numbers.Init();
      NumTypes.Init();
      PosUtils.Init();
      StrConv.Init();
      StrEdit.Init();
      StringIO.Init();
      VStorage.Init();
    END Init;

  CONST
    blank = ' ';
    null = '';
    semicolon = ';';
    backslash = '\';
    fwdslash = '/';
    byte1 = 0;
    OrdA = 65;

  TYPE
    ModeSetCaster =
      RECORD
        CASE : BOOLEAN OF
          TRUE :
          a : ModeSet;
        | FALSE :
          b : BITSET;
        END;
      END;


(*==================== Utility Procedures =====================*)

  PROCEDURE LastByte( FileHandle: CARDINAL ): CHAR;
    VAR
      bufch: CHAR;
    BEGIN
      HandleIO.SetFilePtr(FileHandle, HandleIO.FromEnd, Numbers.Li( -1) );
      StringIO.PrintMessage(HandleIO.BlockRead( FileHandle,
          SYSTEM.ADR(bufch), 1 ));
      RETURN bufch;
    END LastByte;


(*================== Exported Procedures ==================*)

  PROCEDURE AddBlockToFile(FileName : ARRAY OF CHAR;
      FileHandle : CARDINAL; BlockAdr: SYSTEM.ADDRESS;
      BlockSize: CARDINAL );
    VAR
      AlreadyOpen : BOOLEAN;
      EofChar: CHAR;
    BEGIN
      EofChar := CHR(26);
      IF (M2Strings.Length(FileName)=0) OR (FileHandle>4) THEN
        AlreadyOpen := TRUE;
      ELSE
        AlreadyOpen := FALSE;
        StringIO.PrintMessage(HandleIO.OpenFile(FileHandle,FileName));
      END;
      IF LastByte( FileHandle ) = CHR(26) THEN
        HandleIO.SetFilePtr(FileHandle, HandleIO.FromEnd, Numbers.Li( -1) );
          (*Back up to write over the eof.*)
        StringIO.PrintMessage(
        HandleIO.BlockWrite( FileHandle, BlockAdr, BlockSize ));
        StringIO.PrintMessage(
        HandleIO.BlockWrite( FileHandle, SYSTEM.ADR(EofChar), 1 ));
          (*Write a new eof.*)
      ELSE
        HandleIO.SetFilePtr(FileHandle, HandleIO.FromEnd, NumTypes.L0 );
          (*Don't back up to write over the eof.*)
        StringIO.PrintMessage(
        HandleIO.BlockWrite( FileHandle, BlockAdr, BlockSize ));
      END;
      IF AlreadyOpen THEN
        HandleIO.UpdateDisk( FileHandle )
      ELSE
        StringIO.PrintMessage(HandleIO.CloseHandle(FileHandle));
          (*Updates the file's directory entry.*)
      END;
    END AddBlockToFile;


  PROCEDURE AddToFile(FileName : ARRAY OF CHAR; FileHandle : CARDINAL;
      message : ARRAY OF CHAR);
    BEGIN
      (*AddToFile*)
      AddBlockToFile( FileName, FileHandle, SYSTEM.ADR(message),
          M2Strings.Length(message) );
    END AddToFile;


  PROCEDURE ChDir(DirName : ARRAY OF CHAR) : CARDINAL;
    VAR
      ErrorReturn :CARDINAL;
      Reserved:LONGINT;
    BEGIN
      ErrorReturn := FAPI.DOSCHDIR(SYSTEM.ADR(DirName), Reserved);
      RETURN ErrorReturn;
    END ChDir;


  PROCEDURE CopyFile(OldHandle : CARDINAL; NewFileName : ARRAY OF CHAR) :
      CARDINAL;
    TYPE
      memptr =
        RECORD
          addr : LowLevel.Address8086;
          size : CARDINAL;
        END;

    VAR
      TheDrive : CHAR;
      MemoryPtr : memptr;
      NewHandle : CARDINAL;
      SavedMessage : CARDINAL;
      FreeBytes, FileSize, BytesToBeFreed, BytesToRead : LONGINT;

    PROCEDURE ReadOldFile(VAR MemoryPtr : memptr);
      VAR
        BytesRead,ErrorReturn:CARDINAL;
        BytesAvailable : CARDINAL;
      BEGIN
      (*ReadOldFile*)
        IF BytesToRead <= Numbers.Lc( 0 ) THEN
          MemoryPtr.addr.x := NIL;
          RETURN;
        END;
        BytesAvailable := EnvironUtils.MemAvail( 10000);
        WITH MemoryPtr DO
          IF BytesToRead > Numbers.Lc( BytesAvailable ) THEN
            size := BytesAvailable;
          ELSE
            size := Numbers.C( BytesToRead );
          END;
          VStorage.DosAlloc(addr.a, size);
        END;
        ErrorReturn := FAPI.DOSREAD(OldHandle, MemoryPtr.addr.a,
            MemoryPtr.size, SYSTEM.ADR(BytesRead));
        IF BytesRead < MemoryPtr.size THEN
          IF BytesRead = 0 THEN
            StringIO.PrintMessage (StringIO.EndOfFile);
          ELSE
            StringIO.PrintMessage (StringIO.PartialRead);
          END;
        ELSE
          IF ErrorReturn # 0 THEN
            StringIO.PrintMessage(ErrorReturn);
          ELSE
            BytesToRead := BytesToRead - Numbers.Lc( MemoryPtr.size );
              (* Can't use DEC here because JPI doesn't allow LONGINTs
                 to be decremented by CARDINAL values. *)
          END;
        END;
      END ReadOldFile;

    PROCEDURE WriteNewFile(MemoryPtr : memptr);
      VAR
        ErrorReturn, BytesWritten: CARDINAL;
      BEGIN
      (*WriteNewFile*)
        IF MemoryPtr.addr.x=NIL THEN
          RETURN;
        END;
        ErrorReturn := FAPI.DOSWRITE( NewHandle, MemoryPtr.addr.a,
            MemoryPtr.size, SYSTEM.ADR(BytesWritten) );
        IF BytesWritten < MemoryPtr.size THEN
          ErrorManager.WARN('No room to write.');
        END;
        IF ErrorReturn # 0 THEN
          StringIO.PrintMessage(ErrorReturn);
        END;
        VStorage.DosDealloc(MemoryPtr.addr.x, MemoryPtr.size);
      END WriteNewFile;

    PROCEDURE SetDateAndTime();
      VAR
        month, day, year, hours, minutes, seconds : CARDINAL;
      BEGIN
        GetFileDateAndTime(OldHandle, month, day, year, hours, minutes,
            seconds);
(*
  Diagnostics.diagC( 'month', month );
  Diagnostics.diagC( 'day', day );
  Diagnostics.diagC( 'year', year );
  Diagnostics.diagC( 'hours', hours );
  Diagnostics.diagC( 'minutes', minutes );
  Diagnostics.diagC( 'seconds', seconds );
*)
        SetFileDateAndTime(NewHandle, month, day, year, hours, minutes,
            seconds);
      END SetDateAndTime;

    BEGIN
    (*CopyFile*)
      BytesToBeFreed := Numbers.Lc( 0 );
      FileSize := HandleIO.FileLength(OldHandle);
      BytesToRead := FileSize;
      IF M2Strings.Pos(':',NewFileName)=(1+byte1) THEN
        TheDrive := NewFileName[0+byte1];
      ELSE
        TheDrive := 'Z';
        (*Determines the drive to which we're copying.
        'Z' means "default drive" to FreeDiskSpace.*)
      END;
      SavedMessage := FreeDiskSpace(TheDrive,FreeBytes);
      IF SavedMessage # StringIO.NoError THEN
        RETURN SavedMessage;
      END;
      SavedMessage := HandleIO.OpenFile(NewHandle,NewFileName);
      IF SavedMessage = StringIO.NoError THEN
        BytesToBeFreed := HandleIO.FileLength(NewHandle);
        SavedMessage := HandleIO.CloseHandle(NewHandle);
      ELSE
        IF (SavedMessage # StringIO.FileNotFound) AND
            (SavedMessage # 110) THEN (* explicit fail command *)
          RETURN SavedMessage;
        END;
      END;
      IF FileSize > (FreeBytes + BytesToBeFreed) THEN
        SavedMessage := StringIO.AccessDenied;
      (*This will have to stand for 'Not enough room.'*)
        RETURN SavedMessage;
      END;
      SavedMessage := HandleIO.CreateFile( NewHandle, NewFileName );
      IF SavedMessage # StringIO.NoError THEN
        RETURN SavedMessage;
      END;
      REPEAT
        ReadOldFile(MemoryPtr);
        WriteNewFile(MemoryPtr);
      UNTIL BytesToRead <= Numbers.Lc( 0 );
      SetDateAndTime();
      RETURN HandleIO.CloseHandle(NewHandle);
    END CopyFile;

(*
    We can't use this, unfortunately, because DOSCOPY isn't FAPI, and
    the Logitech linker can't handle unresolved symbols, even if the
    references aren't going to get linked in.

  PROCEDURE CopyFile2( SourceName, TargetName: ARRAY OF CHAR ): CARDINAL;
    VAR
      OldFileHandle, ErrorReturn, OSversion: CARDINAL;
      Reserved: LONGINT;
    BEGIN
      FAPI.DOSGETVERSION( SYSTEM.ADR(OSversion) );
      IF OSversion >= 10 THEN
        (* We're under some version of OS/2 *)
        Reserved := NumTypes.L0;
        ErrorReturn := FAPI.DOSCOPY( SYSTEM.ADR(SourceName),
            SYSTEM.ADR(TargetName), BITSET(0), Reserved );
      ELSE
        ErrorReturn := HandleIO.OpenFile( OldFileHandle, SourceName );
        IF ErrorReturn # 0 THEN
          ErrorManager.WarnNumber( 'CopyFile2 error', ErrorReturn );
        END;
        ErrorReturn := CopyFile( OldFileHandle, TargetName );
      END;
      RETURN ErrorReturn;
    END CopyFile2;
*)

  PROCEDURE DeleteFile(FileName : ARRAY OF CHAR) : CARDINAL;
    VAR
      ErrorReturn:CARDINAL;
      Reserved:LONGINT;

      LocalStr: ARRAY [0..79] OF CHAR;
    BEGIN
      M2Strings.Assign( FileName, LocalStr );
        (*We assign to the local string to guarantee that it ends
          with a null byte.*)
      Reserved := VAL(LONGINT,0);
     ErrorReturn := FAPI.DOSDELETE(SYSTEM.ADR(FileName), Reserved);
    (* IF ErrorReturn # 0 THEN
       ErrorManager.WarnNumber( "DOSDELETE error", ErrorReturn );
     END;  let it return error JEM 2/4/92 *)
     RETURN ErrorReturn;
    END DeleteFile;



  PROCEDURE FindFirstFile(FileSpec : ARRAY OF
      CHAR; VAR DirHandle: CARDINAL; VAR
      FileInfo : FileInfoRec) : CARDINAL;
    VAR
      ErrorReturn : CARDINAL;
      Reserved    : LONGINT;
      SearchCount : CARDINAL;
      FileInfoRecord : FAPI.FILEFINDBUF;
      TmpSet : FAPI.USHORT;
      TmpStr : ARRAY [0..80] OF CHAR;
    BEGIN
      (*FindFirstFile*)
      StrEdit.AssignStr(FileSpec, TmpStr);
        (*We have to assign to a local string because the string that
          comes in through the parameter list may not be null terminated. *)
      TmpSet := FAPI.FILE_READONLY + FAPI.FILE_HIDDEN +
          FAPI.FILE_SYSTEM + FAPI.FILE_DIRECTORY;
      SearchCount := 1;
      Reserved :=VAL(LONGINT,0);
      ErrorReturn := FAPI.DOSFINDFIRST( SYSTEM.ADR(TmpStr),
          SYSTEM.ADR(DirHandle), TmpSet,
          SYSTEM.ADR(FileInfoRecord), SYSTEM.SIZE(FileInfoRecord),
          SYSTEM.ADR(SearchCount), Reserved);
      IF ErrorReturn # 0 THEN
        RETURN ErrorReturn;
      END;
      WITH FileInfo DO
        ByteFiddler.CardinalToTime( CARDINAL(FileInfoRecord.ftimeLastWrite),
             hour, minute, second );
        ByteFiddler.CardinalToDate( CARDINAL(FileInfoRecord.fdateLastWrite),
             month, day, year );
        size := FileInfoRecord.cbFile;
        attribute := ModeSet(FileInfoRecord.attrFile);
        M2Strings.Assign( FileInfoRecord.achName, name );
      END;
      RETURN StringIO.NoError;
    END FindFirstFile;


  PROCEDURE FindNextFile( DirHandle: CARDINAL;
      VAR FileInfo : FileInfoRec) : CARDINAL;
    VAR
      ErrorReturn : CARDINAL;
      Reserved    : LONGINT;
      SearchCount : CARDINAL;
      FileInfoRecord : FAPI.FILEFINDBUF;
    BEGIN
      SearchCount := 1;
      ErrorReturn := FAPI.DOSFINDNEXT( DirHandle,
          SYSTEM.ADR(FileInfoRecord), SYSTEM.SIZE(FileInfoRecord),
          SYSTEM.ADR(SearchCount) );
      IF ErrorReturn # 0 THEN
        RETURN ErrorReturn;
      END;
      WITH FileInfo DO
        ByteFiddler.CardinalToTime( CARDINAL(FileInfoRecord.ftimeLastWrite),
            hour, minute, second );
        ByteFiddler.CardinalToDate( CARDINAL(FileInfoRecord.fdateLastWrite),
            month, day, year );
        size := FileInfoRecord.cbFile;
        attribute := ModeSet(FileInfoRecord.attrFile);
        StrEdit.AssignStr( FileInfoRecord.achName, name );
      END;
      RETURN StringIO.NoError;
    END FindNextFile;


  PROCEDURE FreeDiskSpace(DriveLetter : CHAR; VAR FreeBytes : LONGINT) :
      CARDINAL;
    VAR
      DriveNum, ErrorReturn: CARDINAL;
      Level1Data:FAPI.FSALLOCATE;
    BEGIN
      FreeBytes := Numbers.Lc( 0 );
      DriveLetter := CAP(DriveLetter);
      IF (DriveLetter < 'A') OR (DriveLetter > 'Z') THEN
          (* 26 July 87:  changed from AND at suggestion of Marc
             Scheuner and Gregor Kley. *)
        ErrorManager.WARN('Invalid drive specification');
      END;
      IF DriveLetter='Z' THEN
        (*'Z' means default drive*)
        DriveNum := 0;
      ELSE
        DriveNum := ORD(DriveLetter)-64;
      END;
        (*turns an A into a 1, etc*)
      ErrorReturn := FAPI.DOSQFSINFO( DriveNum,
          1, SYSTEM.ADR(Level1Data), SYSTEM.SIZE(Level1Data));
      IF ErrorReturn # 0 THEN
        RETURN ErrorReturn;
      ELSE
        FreeBytes := (Level1Data.cUnitAvail) *
            (Numbers.Lc (Level1Data.cbSector) *
            Level1Data.cSectorUnit);
        RETURN StringIO.NoError;
      END;
    END FreeDiskSpace;


  PROCEDURE GetCurrentDir(TheDrive : CHAR; VAR ThePath : ARRAY OF CHAR) :
      CARDINAL;
    VAR
      ErrorReturn, PathLength, DriveNum:CARDINAL;
      cnt : CARDINAL;
    BEGIN
      TheDrive := CAP(TheDrive);
      IF TheDrive = 'Z' THEN
        DriveNum := 0;
      ELSE
        DriveNum := ((ORD(TheDrive)-OrdA)+1);
      END;
      PathLength := HIGH( ThePath ) + 1;
      ErrorReturn := FAPI.DOSQCURDIR(DriveNum, SYSTEM.ADR(ThePath),
          SYSTEM.ADR(PathLength) );
      M2Strings.Insert( backslash, ThePath, 0 );
      RETURN ErrorReturn;
    END GetCurrentDir;


  PROCEDURE GetDefaultDrive() : CHAR;
     (*Returns the current default drive as an upper case letter.*)
    VAR
      DriveNum, ErrorReturn: CARDINAL;
      LogicalDriveMap: FAPI.ULONG;
    BEGIN
      ErrorReturn := FAPI.DOSQCURDISK( SYSTEM.ADR(DriveNum),
          SYSTEM.ADR(LogicalDriveMap) );
      IF ErrorReturn # 0 THEN
        ErrorManager.WarnNumber("DOSQCURDISK Error", ErrorReturn );
      END;
      RETURN( CHR( ORD(DriveNum) + OrdA - 1 ) );
    END GetDefaultDrive;


  PROCEDURE GetDiskInfo( TheDrive: CHAR; VAR BytesPerSector,
      SectorsPerCluster, ClustersOnDisk: CARDINAL; VAR
      KindOfDisk: DiskTypes );
    VAR
      DriveNum, ErrorReturn: CARDINAL;
      FatIDByte: CHAR;
      Level1Data: FAPI.FSALLOCATE;
    BEGIN
      TheDrive := CAP(TheDrive);
      IF TheDrive = 'Z' THEN
        DriveNum := 0;
      ELSE
        DriveNum := (ORD(TheDrive) - OrdA) + 1;
      END;
      ErrorReturn := FAPI.DOSQFSINFO( DriveNum, 1, SYSTEM.ADR(Level1Data),
          SYSTEM.SIZE(Level1Data) );
      IF ErrorReturn # 0 THEN
        ErrorManager.WarnNumber( "DOSQFSINFO error", ErrorReturn );
      END;
      BytesPerSector := Level1Data.cbSector;
      SectorsPerCluster := Numbers.C(Level1Data.cSectorUnit);
      ClustersOnDisk := Numbers.C(Level1Data.cUnit);
      KindOfDisk := unknown;
    END GetDiskInfo;


  PROCEDURE GetDirFromList( PathStyleStr: ARRAY OF CHAR; whichDir: CARDINAL;
      VAR output: ARRAY OF CHAR ): BOOLEAN;
    VAR
      StartSpot, EndSpot, inStrLngth: CARDINAL;
    BEGIN
      inStrLngth := M2Strings.Length(PathStyleStr);
      output[0] := 0C;
      IF whichDir = 0 THEN
        RETURN( FALSE );
      END;
      IF whichDir = 1 THEN
        StartSpot := LowLevel.ScanEQ( inStrLngth, '=',
            SYSTEM.ADR(PathStyleStr) );
        IF StartSpot >= inStrLngth THEN
          StartSpot := 0;
        END;
      ELSE
        StartSpot := PosUtils.FindNthPattern(semicolon, whichDir - 1,
            PathStyleStr);
        IF StartSpot >= inStrLngth THEN
          RETURN( FALSE );
        END;
      END;
      EndSpot := PosUtils.FindNthPattern(semicolon, whichDir, PathStyleStr);
      IF EndSpot >= inStrLngth THEN
        IF PosUtils.LastNonMatching(blank, PathStyleStr) = semicolon THEN
          RETURN( FALSE );
        END;
        EndSpot := inStrLngth;
      END;
      (* At this point, EndSpot is either sitting on the trailing null
         or on the semicolon following the directory name we want to
         copy out. *)
      M2Strings.Copy( PathStyleStr, StartSpot, EndSpot - StartSpot,
            output );
      IF PosUtils.LastNonMatching(blank, output) # backslash THEN
        StrEdit.Append( output, backslash );
      END;
      RETURN( TRUE );
    END GetDirFromList;


  PROCEDURE GetDrivePathAndName( FileSpec: ARRAY OF CHAR; VAR
      DriveLetter: CHAR; VAR PathName, FileName : ARRAY OF CHAR);
    VAR
      TmpStr : ARRAY [0..79] OF CHAR;
      spot: CARDINAL;
      SavedMessage: CARDINAL;
    BEGIN
      (*GetDrivePathAndName*)
      StrEdit.AssignStr( null, PathName );
      StrEdit.AssignStr( null, FileName );
      DriveLetter := 'Z';
      spot := 0;
      WHILE spot+1 <= M2Strings.Length(FileSpec) DO
        IF FileSpec[spot] = ':' THEN
          DriveLetter := FileSpec[ spot - 1 ];
          M2Strings.Delete(FileSpec, 0, 1 + spot);
          spot := 0;
        ELSIF (FileSpec[spot]=backslash) OR (FileSpec[spot]=fwdslash) THEN
          M2Strings.Copy(FileSpec, 0, spot + 1, TmpStr);
          StrEdit.Append(PathName, TmpStr);
          M2Strings.Delete(FileSpec, 0, 1 + spot);
          spot := 0;
        ELSE
          INC(spot);
        END;
      END;
      IF DriveLetter = 'Z' THEN
        DriveLetter := GetDefaultDrive();
      END;
      IF M2Strings.Length(PathName) = 0 THEN
        SavedMessage := GetCurrentDir( DriveLetter, PathName );
        IF SavedMessage # StringIO.NoError THEN
          StringIO.PrintMessage( SavedMessage );
          HALT();
          (*This error shouldn't be possible.*)
        END;
        IF PathName[ M2Strings.Length(PathName) - 1 ] # backslash THEN
          StrEdit.Append( PathName, backslash );
        END;
      END;
      IF (M2Strings.Length(FileSpec) > 0) AND (NOT (PosUtils.Present('*',
          FileSpec))) AND (NOT (PosUtils.Present('?', FileSpec))) THEN
        StrEdit.AssignStr( FileSpec, FileName );
      END;
    END GetDrivePathAndName;


  PROCEDURE GetFileDateAndTime(FileHandle : CARDINAL; VAR month,
      day, year, hours, minutes, seconds : CARDINAL);
    VAR
      ErrorReturn: CARDINAL;
      FileInfoRec: FAPI.FILEFINDBUF;

    BEGIN
      (*GetFileDateAndTime*)
      LowLevel.Fill( SYSTEM.ADR(FileInfoRec), SYSTEM.SIZE(FileInfoRec), 0C );
      ErrorReturn := FAPI.DOSQFILEINFO( FileHandle, 1,
          SYSTEM.ADR(FileInfoRec), SYSTEM.SIZE(FileInfoRec) );
(*
Diagnostics.diagC( 'FileHandle', FileHandle );
Diagnostics.diagC( 'fdateCreation', FileInfoRec.fdateCreation );
Diagnostics.diagC( 'ftimeCreation', FileInfoRec.ftimeCreation );
Diagnostics.diagC( 'fdateLastAccess', FileInfoRec.fdateLastAccess );
Diagnostics.diagC( 'ftimeLastAccess', FileInfoRec.ftimeLastAccess );
Diagnostics.diagC( 'fdateLastWrite', FileInfoRec.fdateLastWrite );
Diagnostics.diagC( 'ftimeLastWrite', FileInfoRec.ftimeLastWrite );
Diagnostics.diagL( 'file', FileInfoRec.file );
Diagnostics.diagL( 'fileAlloc', FileInfoRec.fileAlloc );
Diagnostics.diagC( 'attrFile', FileInfoRec.attrFile );
Diagnostics.diagC( 'cname', ORD(FileInfoRec.cname) );
Diagnostics.diagS( 'name', FileInfoRec.name );
Diagnostics.diagBlock( 'FileInfoRec', SYSTEM.ADR(FileInfoRec), SYSTEM.SIZE(FileInfoRec) );
*)
      IF ErrorReturn # 0 THEN
        ErrorManager.WarnNumber( "GetFileDateAndTime error ", ErrorReturn );
      ELSE
        ByteFiddler.CardinalToTime( CARDINAL(FileInfoRec.ftimeLastWrite),
            hours, minutes, seconds );
        ByteFiddler.CardinalToDate( CARDINAL(FileInfoRec.fdateLastWrite),
            month, day, year );
      END;
    END GetFileDateAndTime;


  PROCEDURE GetFileMode(FileName : ARRAY OF CHAR; VAR TheSet : ModeSet) :
      CARDINAL;
    VAR
      ErrorReturn: CARDINAL;
      DosFileAttr: FAPI.USHORT;
      Reserved: LONGINT;
      TmpSet: ModeSetCaster;
      LocalStr: ARRAY [0..79] OF CHAR;
    BEGIN
      TmpSet.a := ModeSet{};
      M2Strings.Assign( FileName, LocalStr );
      ErrorReturn:= FAPI.DOSQFILEMODE(SYSTEM.ADR(LocalStr),
          SYSTEM.ADR(DosFileAttr), Reserved);
      IF ErrorReturn # 0 THEN
        TheSet := TmpSet.a;
        ErrorManager.WarnNumber("DosQFileMode error", ErrorReturn );
        RETURN ErrorReturn;
      ELSE
        TmpSet.b := BITSET(CARDINAL(DosFileAttr));
        TheSet := TmpSet.a;
        RETURN StringIO.NoError;
      END;
    END GetFileMode;


  PROCEDURE MkDir(DirName : ARRAY OF CHAR) : CARDINAL;
    VAR
      Reserved:LONGINT;
      ErrorReturn:CARDINAL;
      LocalStr: ARRAY [0..79] OF CHAR;
    BEGIN
      M2Strings.Assign( DirName, LocalStr );
      ErrorReturn := FAPI.DOSMKDIR(SYSTEM.ADR(LocalStr),Reserved);
      RETURN ErrorReturn;
    END MkDir;


  PROCEDURE RenameFile(OldFileName, NewFileName : ARRAY OF CHAR) :
      CARDINAL;
    VAR
      ErrorReturn:CARDINAL;
      dumstr : ARRAY [0..5] OF CHAR;
      LocalStr1, LocalStr2: ARRAY [0..79] OF CHAR;
    BEGIN
      M2Strings.Assign( OldFileName, LocalStr1 );
      M2Strings.Assign( NewFileName, LocalStr2 );
      IF M2Strings.Pos(':',LocalStr2) = 1 THEN
        M2Strings.Delete(LocalStr2, 0, 2);
      END;
      IF M2Strings.Pos(':',LocalStr1) = 1 THEN
        M2Strings.Copy(LocalStr1, 0, 2, dumstr);
          (* 26 July 87:  changed from 1, 2 at suggestion of Marc
             Scheuner and Gregor Kley. *)
        M2Strings.Insert(dumstr, LocalStr2, 0+byte1);
      END;
      ErrorReturn := FAPI.DOSMOVE( SYSTEM.ADR(LocalStr1),
          SYSTEM.ADR(LocalStr2), NumTypes.L0);
      RETURN ErrorReturn;
    END RenameFile;


  PROCEDURE RmDir(DirName : ARRAY OF CHAR) : CARDINAL;
    VAR
      ErrorReturn: CARDINAL;
      Reserved: LONGINT;
      LocalStr: ARRAY [0..79] OF CHAR;
    BEGIN
      M2Strings.Assign( DirName, LocalStr );
      ErrorReturn := FAPI.DOSRMDIR(SYSTEM.ADR(LocalStr),
          Reserved);
      RETURN ErrorReturn;
    END RmDir;


  PROCEDURE SetDefaultDrive(DriveLetter : CHAR);
    (*Needs to return an ErrorMessage so that you can
      determine how many drives there are in the system.*)
    VAR
      ErrorReturn: CARDINAL;
      DriveNum: CARDINAL;
    BEGIN
      DriveLetter := CAP(DriveLetter);
      IF (DriveLetter<'A') OR (DriveLetter>'Z') THEN
        StringIO.PrintMessage(StringIO.InvalidDrive);
      END;
      DriveNum := (ORD(DriveLetter)-OrdA);
      ErrorReturn := FAPI.DOSSELECTDISK(DriveNum);
      IF ErrorReturn # 0 THEN
        StringIO.PrintMessage(ErrorReturn);
      END;
    END SetDefaultDrive;


  PROCEDURE SetFileDateAndTime(FileHandle, month, day, year, hours,
      minutes, seconds : CARDINAL);
    VAR
      ErrorReturn: CARDINAL;
      FileInfoRec: FAPI.FILEFINDBUF;
    BEGIN
      (*SetFileDateAndTime*)
      LowLevel.Fill( SYSTEM.ADR(FileInfoRec), SYSTEM.SIZE(FileInfoRec), 0C );
      FileInfoRec.fdateLastWrite := FAPI.FDATE(ByteFiddler.DateToCardinal(month, day,
          year));
      FileInfoRec.ftimeLastWrite := FAPI.FTIME(ByteFiddler.TimeToCardinal(hours,
          minutes, seconds));
      ErrorReturn := FAPI.DOSSETFILEINFO( FileHandle, 1,
          SYSTEM.ADR(FileInfoRec), SYSTEM.TSIZE(FAPI.FILEFINDBUF) );
      IF ErrorReturn # 0 THEN
        ErrorManager.WarnNumber( 'SetFileDateAndTime error', ErrorReturn );
      END;
    END SetFileDateAndTime;


  PROCEDURE SetFileMode(FileName : ARRAY OF CHAR; TheSet : ModeSet) :
      CARDINAL;
    VAR
      ErrorReturn: CARDINAL;
      Reserved: LONGINT;
      TmpSet: ModeSetCaster;
      LocalStr: ARRAY [0..79] OF CHAR;
    BEGIN
      TmpSet.a := TheSet;
      M2Strings.Assign( FileName, LocalStr );
      ErrorReturn := FAPI.DOSSETFILEMODE(SYSTEM.ADR(LocalStr),
                     FAPI.FILE_NORMAL, Reserved);
      RETURN ErrorReturn;
    END SetFileMode;

  PROCEDURE SetFileLength( TheHandle:CARDINAL;length:LONGINT):CARDINAL;

  BEGIN
    RETURN FAPI.DOSNEWSIZE(TheHandle,length);
  END SetFileLength;


  PROCEDURE ValidFile( fname: ARRAY OF CHAR ): BOOLEAN;
    VAR
      TmpHandle: CARDINAL;
      ErrorReturn: CARDINAL;
    BEGIN
      IF HandleIO.FileExists( fname ) THEN
        RETURN TRUE;
      END;
      IF HandleIO.CreateFile( TmpHandle, fname ) = StringIO.NoError THEN
        ErrorReturn := HandleIO.CloseHandle(TmpHandle);
        ErrorReturn := DeleteFile( fname );
        RETURN (ErrorReturn = StringIO.NoError);
      ELSE
        RETURN FALSE;
      END;
    END ValidFile;


  PROCEDURE VolumeLabel(TheDrive : CHAR; VAR TheLabel : ARRAY OF CHAR);
    (*Returns the label of the disk in TheDrive.*)
    VAR
      DriveNum, ErrorReturn: CARDINAL;
      Level2Data: FAPI.FSINFO;
      cnt : CARDINAL;
      nextchar : CHAR;
    BEGIN
      (*VolumeLabel*)
      TheDrive := CAP(TheDrive);
      IF TheDrive='Z' THEN
        DriveNum := 0;
      ELSE
        DriveNum := ORD(TheDrive) - OrdA + 1;
          (*sets 'A' to 1, 'B' to 2, etc.*)
      END;
      StrEdit.AssignStr(null, TheLabel);
      ErrorReturn := FAPI.DOSQFSINFO( DriveNum,
          2, SYSTEM.ADR(Level2Data), SYSTEM.TSIZE(FAPI.FSINFO));
      IF (ErrorReturn = 125) THEN
        (* DOSQFSINFO returns 125 if the drive has no volume label.
           In this case we set TheLabel to preserve compatibility with
           DOS version. *)
        StrEdit.AssignStr( 'unlabelled volume', TheLabel );
      ELSIF (ErrorReturn # 0) THEN
        ErrorManager.WarnNumber( "DosQFSInfo error", ErrorReturn );
      ELSE
        StrEdit.AssignStr( Level2Data.vol.szVolLabel, TheLabel );
      END;
    END VolumeLabel;


  PROCEDURE FindFiles(FileName : ARRAY OF CHAR; FileProc :
      FileInfoProc) : CARDINAL;
    VAR
      info : FileInfoRec;
      DirHandle, result : CARDINAL;
    BEGIN
      DirHandle := 0FFFFH;
      result := FindFirstFile(FileName, DirHandle, info);
      IF result=StringIO.NoError THEN
        LOOP
          IF NOT FileProc(info) THEN
            EXIT;
          END;
          result := FindNextFile(DirHandle, info);
          IF result#StringIO.NoError THEN
            IF result = StringIO.NoMoreFiles THEN
              result := StringIO.NoError;
            END;
            EXIT;
          END;
        END;
      END;
      IF 0 # FAPI.DOSFINDCLOSE( DirHandle ) THEN END;
      RETURN result;
    END FindFiles;


BEGIN
  Initialized := FALSE;
  Init();
END Drectory.