Node:WinDos, Previous:Turbo3, Up:GPC Units
The following listing contains the interface of the WinDos unit.
This is a portable implementation of most routines from BP's
WinDos unit. A few routines that are Dos - or even IA32 real
mode - specific, are only available if
__BP_UNPORTABLE_ROUTINES__ is defined,
BP Incompatibilities.
The same functionality and much more is available in the Run Time
System, Run Time System. The RTS routines usually have
different names and/or easier and less limiting interfaces (e.g.
ReadDir etc. vs. FindFirst etc.), and are often more
efficient.
Therefore, using this unit is not recommended in newly written
programs.
{ Mostly BP compatible portable WinDos unit
This unit supports most, but not all, of the routines and
declarations of BP's WinDos unit.
Notes:
- The procedures GetIntVec and SetIntVec are not supported since
they make only sense for Dos real-mode programs (and GPC
compiled programs do not run in real-mode, even on IA32 under
Dos). The procedures Intr and MsDos are only supported under
DJGPP if __BP_UNPORTABLE_ROUTINES__ is defined (with the
-D__BP_UNPORTABLE_ROUTINES__ option). A few other routines are
also only supported with this define, but on all platforms (but
they are crude hacks, that's why they are not supported without
this define).
- The internal structure of file variables (TFileRec and TTextRec)
is different in GPC. However, as far as TFDDs are concerned,
there are other ways to achieve the same in GPC, see the GPC
unit.
Copyright (C) 1998-2003 Free Software Foundation, Inc.
Author: Frank Heckenbach <frank@pascal.gnu.de>
This file is part of GNU Pascal.
GNU Pascal is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2, or (at your
option) any later version.
GNU Pascal is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Pascal; see the file COPYING. If not, write to the
Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
As a special exception, if you link this file with files compiled
with a GNU compiler to produce an executable, this does not cause
the resulting executable to be covered by the GNU General Public
License. This exception does not however invalidate any other
reasons why the executable file might be covered by the GNU
General Public License. }
{$gnu-pascal,I-}
{$if __GPC_RELEASE__ < 20030412}
{$error This unit requires GPC release 20030412 or newer.}
{$endif}
{ @@ Work-around for a problem with COFF debug info. Will hopefully
disappear with qualified identifiers. }
{$ifdef __GO32__}
{$local W-} {$no-debug-info} {$endlocal}
{$endif}
module WinDos;
export WinDos = all (FCarry, FParity, FAuxiliary, FZero, FSign,
FOverflow,
DosError, GetDate, GetTime, GetCBreak,
SetCBreak,
GetVerify, SetVerify, DiskFree, DiskSize,
GetFAttr, SetFAttr, GetFTime, SetFTime,
UnpackTime, PackTime,
{$ifdef __BP_UNPORTABLE_ROUTINES__}
{$ifdef __GO32__}
Intr, MsDos,
{$endif}
DosVersion, SetDate, SetTime,
{$endif}
CStringGetEnv => GetEnvVar);
import GPC; System; Dos (FindFirst => Dos_FindFirst,
FindNext => Dos_FindNext,
FindClose => Dos_FindClose);
const
{ File attribute constants }
faReadOnly = ReadOnly;
faHidden = Hidden; { set for dot files except . and .. }
faSysFile = SysFile; { not supported }
faVolumeID = VolumeID; { not supported }
faDirectory = Directory;
faArchive = Archive; { means: not executable }
faAnyFile = AnyFile;
{ Maximum file name component string lengths }
fsPathName = 79;
fsDirectory = 67;
fsFileName = 8;
fsExtension = 4;
{ FileSplit return flags }
fcExtension = 1;
fcFileName = 2;
fcDirectory = 4;
fcWildcards = 8;
type
PTextBuf = ^TTextBuf;
TTextBuf = TextBuf;
{ Search record used by FindFirst and FindNext }
TSearchRec = record
Fill: SearchRecFill;
Attr: Byte8;
Time, Size: LongInt;
Name: {$ifdef __BP_TYPE_SIZES__}
packed array [0 .. 12] of Char
{$else}
TStringBuf
{$endif};
Reserved: SearchRec
end;
{ Date and time record used by PackTime and UnpackTime }
TDateTime = DateTime;
{ 8086 CPU registers -- only used by the unportable Dos routines }
TRegisters = Registers;
{ FindFirst and FindNext are quite inefficient since they emulate
all the brain-dead Dos stuff. If at all possible, the standard
routines OpenDir, ReadDir and CloseDir (in the GPC unit) should be
used instead. }
procedure FindFirst (Path: PChar; Attr: Word; var SR: TSearchRec);
attribute (name = '_p_WFindFirst');
procedure FindNext (var SR: TSearchRec); attribute (name
= '_p_WFindNext');
procedure FindClose (var SR: TSearchRec); attribute (name
= '_p_WFindClose');
function FileSearch (Dest, FileName, List: PChar): PChar; attribute
(name = '_p_WFileSearch');
function FileExpand (Dest, FileName: PChar): PChar; attribute (name
= '_p_WFileExpand');
function FileSplit (Path, Dir, BaseName, Ext: PChar): Word;
attribute (name = '_p_WFileSplit');
function GetCurDir (Dir: PChar; Drive: Byte): PChar; attribute
(name = '_p_WGetCurDir');
procedure SetCurDir (Dir: PChar); attribute (name
= '_p_WSetCurDir');
procedure CreateDir (Dir: PChar); attribute (name
= '_p_WCreateDir');
procedure RemoveDir (Dir: PChar); attribute (name
= '_p_WRemoveDir');
function GetArgCount: Integer; attribute (name
= '_p_WGetArgCount');
function GetArgStr (Dest: PChar; ArgIndex: Integer; MaxLen: Word):
PChar; attribute (name = '_p_WGetArgStr');