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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 EMX.
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);
begin
DoDirSeparators (S);
asm
movl S, %edx
movb Func, %ah
call SysCall
jnc .LDOS_DIRS1
movw %ax, InOutRes
.LDOS_DIRS1:
end ['eax', 'edx'];
end;
procedure do_MkDir (S: rawbytestring);
var
RC: cardinal;
begin
if os_mode = osOs2 then
begin
DoDirSeparators (S);
RC := DosCreateDir (pchar(S), nil);
if RC <> 0 then
begin
InOutRes := RC;
Errno2InOutRes;
end;
end
else
begin
{ Under EMX 0.9d DOS this routine call may sometimes fail }
{ The syscall documentation indicates clearly that this }
{ routine was NOT tested. }
DosDir ($39, S);
end;
end;
procedure do_RmDir (S: rawbytestring);
var
RC: cardinal;
begin
if S = '.' then
InOutRes := 16
else
if os_mode = osOs2 then
begin
DoDirSeparators (S);
RC := DosDeleteDir (pchar(S));
if RC <> 0 then
begin
InOutRes := RC;
Errno2InOutRes;
end;
end
else
{ Under EMX 0.9d DOS this routine call may sometimes fail }
{ The syscall documentation indicates clearly that this }
{ routine was NOT tested. }
DosDir ($3A, S);
end;
{$ASMMODE INTEL}
procedure do_ChDir (S: rawbytestring);
var
RC: cardinal;
Len: longint;
begin
(* According to EMX documentation, EMX has only one current directory
for all processes, so we'll use native calls under OS/2. *)
Len := Length (S);
if os_Mode = osOS2 then
begin
if (Len >= 2) and (S [2] = ':') then
begin
RC := DosSetDefaultDisk ((Ord (S[1]) and not ($20)) - $40);
if RC <> 0 then
begin
InOutRes := RC;
Errno2InOutRes;
end
else
if Len > 2 then
begin
DoDirSeparators (S);
if (S [Len] = DirectorySeparator) and (Len <> 3) then
S [Len] := #0;
RC := DosSetCurrentDir (pchar(S));
if RC <> 0 then
begin
InOutRes := RC;
Errno2InOutRes;
end;
end;
end
else
begin
DoDirSeparators (S);
if (Len > 1) and (S [Len] = DirectorySeparator) then
S [Len] := #0;
RC := DosSetCurrentDir (pchar(S));
if RC <> 0 then
begin
InOutRes:= RC;
Errno2InOutRes;
end;
end;
end
else
if (Len >= 2) and (S [2] = ':') then
begin
asm
mov esi, S
mov al, [esi + 1]
and al, not (20h)
sub al, 41h
mov edx, eax
mov ah, 0Eh
call syscall
mov ah, 19h
call syscall
cmp al, dl
jz @LCHDIR
mov InOutRes, 15
@LCHDIR:
end ['eax','edx','esi'];
if (Len > 2) and (InOutRes <> 0) then
begin
if (S [Len] in AllowDirectorySeparators) and (Len <> 3) then
S [Len] := #0;
{ Under EMX 0.9d DOS this routine may sometime }
{ fail or crash the system. }
DosDir ($3B, S);
end;
end
else
begin
if (Len > 1) and (S [Len] in AllowDirectorySeparators) then
S [Len] := #0;
{ Under EMX 0.9d DOS this routine may sometime }
{ fail or crash the system. }
DosDir ($3B, S);
end;
end;
{$ASMMODE ATT}
procedure do_GetDir (DriveNr: byte; var Dir: RawByteString);
{Written by Michael Van Canneyt.}
var sof:Pchar;
i:byte;
begin
SetLength(Dir,260);
Dir [4] := #0;
{ Used in case the specified drive isn't available }
sof:=pchar(@dir[4]);
{ dir[1..3] will contain '[drivenr]:\', but is not }
{ supplied by DOS, so we let dos string start at }
{ dir[4] }
{ Get dir from drivenr : 0=default, 1=A etc... }
asm
movb drivenr,%dl
movl sof,%esi
mov $0x47,%ah
call syscall
jnc .LGetDir
movw %ax, InOutRes
.LGetDir:
end [ 'eax','edx','esi'];
{ Now Dir should be filled with directory in ASCIIZ, }
{ starting from dir[4] }
dir[2]:=':';
dir[3]:='\';
i:=4;
{Conversion to Pascal string }
while (dir[i]<>#0) do
begin
{ convert path name to DOS }
if dir[i] in AllowDirectorySeparators then
dir[i]:=DirectorySeparator;
inc(i);
end;
SetLength(dir,i-1);
if drivenr<>0 then { Drive was supplied. We know it }
dir[1]:=chr(64+drivenr)
else
begin
{ We need to get the current drive from DOS function 19H }
{ because the drive was the default, which can be unknown }
asm
movb $0x19,%ah
call syscall
addb $65,%al
movb %al,i
end ['eax'];
dir[1]:=char(i);
end;
SetCodePage(dir,DefaultFileSystemCodePage,false);
{ upcase the string (FPC function) }
if not (FileNameCasePreserving) then dir:=upcase(dir);
end;
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