fpc/api/os2/filectrl.inc
2000-12-17 20:39:46 +00:00

179 lines
4.2 KiB
PHP

{
System independent filecontrol interface for os2
$Id$
}
{$IFDEF PPC_Virtual}
uses
OS2Base;
{$ENDIF}
{$IFDEF PPC_Speed}
uses
BseDOS;
{$ENDIF}
{$IFDEF PPC_FPC}
uses
DosCalls;
{$ENDIF}
{ not converted to the new error handling scheme (ie: calling
ErrorHandler, instead of dumping an error code to ErrorCode) }
{$IFDEF BIT_16}
{ There's a unit for DOSCALLS for BPOS2 available as well, should be using
these functions from there... }
function DosClose (Handle: Word): Word; far;
external 'DOSCALLS' Index 59; { Dos close function }
function DosOpen (FileName: PChar; var Handle: Word;
var ActionTaken: Word; FileSize: LongInt;
FileAttr: Word; OpenFlag, OpenMode: Word;
Reserved: Pointer): Word; far;
external 'DOSCALLS' index 70; { Dos open function }
function DosDelete(FileName: PChar; Reserved: Longint): Word; far;
external 'DOSCALLS' index 60;
function DosRead(Handle: Word; var BufferArea;
BufferLength: Word; var BytesRead : Word): Word; far;
external 'DOSCALLS' index 137; { Dos read procedure }
function DosWrite(Handle: Word; var BufferArea;
BufferLength: Word; var BytesRead : Word): Word; far;
external 'DOSCALLS' index 138; { Dos write procedure }
function DosSetFilePtr (Handle: Word; ulOffset: LongInt;
MoveType: Word; var NewPointer: LongInt): LongInt; far;
external 'DOSCALLS' index 58; { Dos seek procedure }
function DosGetFilePtr (Handle: Word; var CurPos: longint): longint;
begin
DosGetFilePtr := DosSetFilePtr (Handle, 0, skCur, CurPos);
end;
function DosResetBuffer (Handle: Word): longint; far;
external 'DOSCALLS' index 56; { Dos flush procedure }
function DosSetFileSize (Handle: Word; Size: longint): longint; far;
external 'DOSCALLS' index 68; { Dos write procedure }
{$ENDIF}
function OpenFileStr(FName: PChar; Flags: Longint): TFileHandle;
var
Handle, ActionTaken: CPUWord;
begin
ErrorCode := DosOpen(FName, Handle, ActionTaken, 0, $20, 1, Flags, nil);
if ErrorCode <> 0 then
OpenFileStr := -1
else begin
OpenFileStr := Handle;
ErrorCode := 0;
end;
end;
function CreateFileStr(FName: PChar): TFileHandle;
var
Handle, ActionTaken: CPUWord;
begin
ErrorCode := DosOpen(FName, Handle, ActionTaken, 0, $20, $12, 1, nil);
if ErrorCode <> 0 then
CreateFileStr := -1
else begin
CreateFileStr := Handle;
ErrorCode := 0;
end;
end;
procedure CloseFile(Handle: TFileHandle);
begin
ErrorCode := DosClose(Handle);
end;
procedure DeleteFileStr(FName: PChar);
begin
ErrorCode := DosDelete(FName);
end;
function ReadFile(Handle: TFileHandle; var Buff; Count: CPUWord): CPUWord;
var
BuffRead: CPUWord;
begin
ErrorCode := DosRead(Handle, Buff, Count, BuffRead);
if ErrorCode <> 0 then
ReadFile := 0
else begin
ReadFile := BuffRead;
end;
end;
function WriteFile(Handle: TFileHandle; var Buff; Count: CPUWord): CPUWord;
var
BuffWritten: CPUWord;
begin
ErrorCode := DosWrite(Handle, Buff, Count, BuffWritten);
if ErrorCode <> 0 then
WriteFile := 0
else begin
WriteFile := BuffWritten;
end;
end;
function SeekFile(Handle: TFileHandle; Pos: TFileInt; SeekType: Word): TFileInt;
var
NewPos: Longint;
begin
ErrorCode := DosSetFilePtr(Handle, Pos, SeekType, NewPos);
if ErrorCode <> 0 then
SeekFile := -1
else begin
SeekFile := NewPos;
end;
end;
procedure FlushFile(Handle: TFileHandle);
begin
ErrorCode := DosResetBuffer (Handle);
end;
procedure TruncateFile(Handle: TFileHandle);
var
CurPos: longint;
begin
ErrorCode := DosGetFilePtr(Handle, CurPos);
if ErrorCode = 0 then ErrorCode := DosSetFileSize (Handle, CurPos);
end;
function EndOfFile(Handle: TFileHandle): Boolean;
begin
EndOfFile := FilePos(Handle) >= FileSize(Handle);
end;
function FilePos(Handle: TFileHandle): TFileInt;
begin
FilePos := SeekFile(Handle, 0, skCur);
end;
function FileSize(Handle: TFileHandle): TFileInt;
var
L: Longint;
begin
L := FilePos(Handle);
FileSize := SeekFile(Handle, 0, skEnd);
SeekFile(Handle, L, skBeg);
end;
{
$Log$
Revision 1.3 2000-12-17 20:39:46 hajny
* OS/2 implementation corrected and finished
Revision 1.2 2000/07/13 11:32:25 michael
+ removed logs
}