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{*****************************************************************************
Directory Handling
*****************************************************************************}
procedure DosDir(func:byte;s:rawbytestring);
var
buffer : array[0..255] of char;
regs : trealregs;
begin
DoDirSeparators(s);
if length(s)>255 then
begin
inoutres:=3;
exit;
end;
move(s[1],buffer,length(s));
buffer[length(s)]:=#0;
{ True DOS does not like backslashes at end
Win95 DOS accepts this !!
but "\" and "c:\" should still be kept and accepted hopefully PM }
if (length(s)>0) and (buffer[length(s)-1]='\') and
Not ((length(s)=1) or ((length(s)=3) and (s[2]=':'))) then
buffer[length(s)-1]:=#0;
syscopytodos(longint(@buffer),length(s)+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;
begin
{ First handle Drive changes }
if (length(s)>=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 length(s)=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,255);
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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