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{
System independent filecontrol interface for linux
$Id: filectrl.inc,v 1.1 1998/12/04 12:48:30 peter Exp $
}
uses
Linux;
function OpenFileStr(FName: PChar; Flags: Longint): TFileHandle; [ alias: 'OpenFile' ];
var
RC : longint;
Todo: TErrorHandlerReturnValue;
begin
repeat
OpenFileStr:=fdOpen(FName, Flags, FilePerms);
RC:=LinuxError;
if (RC > 0) then
Todo := ErrorHandler(RC, FName);
until (RC <= 0) or (Todo <> errRetry);
end;
function CreateFileStr(FName: PChar): TFileHandle; [ alias: 'CreateFile' ];
const
O_RDONLY = 0;
O_WRONLY = 1;
O_RDWR = 2;
O_CREATE = 64;
O_EXCL = 128;
O_NOCTTY = 256;
O_TRUNC = 512;
O_APPEND = 1024;
begin
CreateFileStr := OpenFileStr(FName, O_RDWR+O_CREATE+O_TRUNC);
end;
procedure CloseFile(Handle: TFileHandle);
var
RC: Longint;
Todo: TErrorHandlerReturnValue;
begin
repeat
fdClose(Handle);
RC := LinuxError;
if (RC > 0) then
Todo := ErrorHandler(RC, nil);
until (RC <= 0) or (Todo <> errRetry);
end;
function SeekFile(Handle: TFileHandle; Pos: TFileInt; SeekType: Word): TFileInt;
var
RC: Longint;
Todo: TErrorHandlerReturnValue;
begin
repeat
RC := -fdSeek(Handle, Pos, SeekType);
if (RC > 0) then
Todo := ErrorHandler(RC, nil);
until (RC <= 0) or (Todo <> errRetry);
SeekFile := -RC;
end;
procedure DeleteFileStr(FName: PChar); [ alias: 'DeleteFile' ];
var
RC: Longint;
Todo: TErrorHandlerReturnValue;
begin
repeat
UnLink(FName);
RC:=LinuxError;
if (RC > 0) then
Todo := ErrorHandler(RC, nil);
until (RC <= 0) or (Todo <> errRetry);
end;
function ReadFile(Handle: TFileHandle; var Buff; Count: CPUWord): CPUWord;
var
RC: Longint;
BytesRead: LongInt;
Todo: TErrorHandlerReturnValue;
begin
repeat
BytesRead := fdRead(Handle, Buff, Count);
RC:=LinuxError;
if (RC > 0) then
Todo := ErrorHandler(RC, nil);
until (RC <= 0) or (Todo <> errRetry);
if (RC > 0) then
ReadFile := 0
else
ReadFile := BytesRead;
end;
function WriteFile(Handle: TFileHandle; var Buff; Count: CPUWord): CPUWord;
var
RC: Longint;
BytesWritten: LongInt;
Todo: TErrorHandlerReturnValue;
begin
repeat
BytesWritten := fdWrite(Handle, Buff, Count);
RC:=LinuxError;
if (RC > 0) then
Todo := ErrorHandler(RC, nil);
until (RC <= 0) or (Todo <> errRetry);
if (RC > 0) then
WriteFile := 0
else
WriteFile := BytesWritten;
end;
{ The following two routines should go to syscalls... }
procedure FlushFile(Handle: TFileHandle);
var
RC: Longint;
Todo: TErrorHandlerReturnValue;
begin
repeat
fdFlush(Handle);
RC:=LinuxError;
if (RC > 0) then
Todo := ErrorHandler(RC, nil);
until (RC <= 0) or (Todo <> errRetry);
end;
procedure TruncateFile(Handle: TFileHandle);
var
RC: Longint;
Todo: TErrorHandlerReturnValue;
begin
repeat
fdTruncate(Handle,0);
RC:=LinuxError;
if (RC > 0) then
Todo := ErrorHandler(RC, nil);
until (RC <= 0) or (Todo <> errRetry);
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: filectrl.inc,v $
Revision 1.1 1998/12/04 12:48:30 peter
* moved some dirs
Revision 1.1 1998/10/26 11:31:47 peter
+ inital include files
}
|
