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{
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Florian Klaempfl and Pavel Ozerski
member of the Free Pascal development team.
FPC Pascal system unit for go32v2.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program 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.
**********************************************************************}
{*****************************************************************************
Directory Handling
*****************************************************************************}
procedure DosDir(func:byte;s:rawbytestring);
var
regs : trealregs;
len : longint;
begin
DoDirSeparators(s);
{ True DOS does not like backslashes at end
Win95 DOS accepts this !!
but "\" and "c:\" should still be kept and accepted hopefully PM }
len:=length(s);
if (len>0) and (s[len]='\') and
Not ((len=1) or ((len=3) and (s[2]=':'))) then
s[len]:=#0;
syscopytodos(longint(pointer(s)),len+1);
regs.realedx:=tb_offset;
regs.realds:=tb_segment;
if LFNSupport then
regs.realeax:=$7100+func
else
regs.realeax:=func shl 8;
sysrealintr($21,regs);
if (regs.realflags and carryflag) <> 0 then
GetInOutRes(lo(regs.realeax));
end;
Procedure do_MkDir(const s: rawbytestring);
begin
DosDir($39,s);
end;
Procedure do_RmDir(const s: rawbytestring);
begin
if s='.' then
begin
InOutRes := 16;
exit;
end;
DosDir($3a,s);
end;
Procedure do_ChDir(const s: rawbytestring);
var
regs : trealregs;
len : longint;
begin
len:=length(s);
{ First handle Drive changes }
if (len>=2) and (s[2]=':') then
begin
regs.realedx:=(ord(s[1]) and (not 32))-ord('A');
regs.realeax:=$0e00;
sysrealintr($21,regs);
regs.realeax:=$1900;
sysrealintr($21,regs);
if byte(regs.realeax)<>byte(regs.realedx) then
begin
Inoutres:=15;
exit;
end;
{ DosDir($3b,'c:') give Path not found error on
pure DOS PM }
if len=2 then
exit;
end;
{ do the normal dos chdir }
DosDir($3b,s);
end;
procedure do_GetDir (DriveNr: byte; var Dir: RawByteString);
var
temp : array[0..255] of char;
i : longint;
regs : trealregs;
begin
regs.realedx:=drivenr;
regs.realesi:=tb_offset;
regs.realds:=tb_segment;
if LFNSupport then
regs.realeax:=$7147
else
regs.realeax:=$4700;
sysrealintr($21,regs);
if (regs.realflags and carryflag) <> 0 then
Begin
GetInOutRes (lo(regs.realeax));
Dir := char (DriveNr + 64) + ':\';
SetCodePage (Dir,DefaultFileSystemCodePage,false);
exit;
end
else
syscopyfromdos(longint(@temp),251);
{ conversion to Pascal string including slash conversion }
i:=0;
SetLength(dir,260);
while (temp[i]<>#0) do
begin
if temp[i] in AllowDirectorySeparators then
temp[i]:=DirectorySeparator;
dir[i+4]:=temp[i];
inc(i);
end;
dir[2]:=':';
dir[3]:='\';
SetLength(dir,i+3);
SetCodePage(dir,DefaultFileSystemCodePage,false);
{ upcase the string }
if not FileNameCasePreserving then
dir:=upcase(dir);
if drivenr<>0 then { Drive was supplied. We know it }
dir[1]:=char(65+drivenr-1)
else
begin
{ We need to get the current drive from DOS function 19H }
{ because the drive was the default, which can be unknown }
regs.realeax:=$1900;
sysrealintr($21,regs);
i:= (regs.realeax and $ff) + ord('A');
dir[1]:=chr(i);
end;
end;
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