Source file: /~heha/hsn/wnetdrv.zip/LFN.PAS

unit lfn;
{pascal unit for _full_ access to the LFN API, no fallbacks}
{Names and parameter lists are similar but not equal to Win32 API}
{$W-,S-,G+}
{$IFDEF Windows}
{$C MOVEABLE PRELOAD PERMANENT}	{gleiche Attribute wie Unit SYSTEM}
{$ENDIF}
interface
uses WinDos{$IFDEF Windows},WinProcs,WinTypes,Win31{$ENDIF};
{$IFNDEF Windows}
type
 Bool=WordBool;
{$ENDIF}
var
 ExtraInfo:Word;	{CX value for FindFirst, FindNext, CreateFile}
const
 DateFormat: Bool=true;	{DOS time format for FindFirst, FindNext (SI)}
var
 AliasHint: Word absolute DateFormat;	{also: AliasHint for CreateFile}

type
 LongRec=record
  lo,hi:Word;
 end;
 LongLong=record
  lo,hi:LongInt;
 end;
 PWin32FindData=^TWin32FindData;
 TWin32FindData=record
  attr: LongInt;
  timec: LongLong;
  timea: LongLong;
  timem: LongLong;
  sizeh,sizel: LongInt;
  rsv: LongLong;
  namel: array[0..259] of Char;
  names: array[0..13] of Char;
 end;
 PVolumeInformation=^TVolumeInformation;
 TVolumeInformation=record
  fsname:array[0..15] of Char;
  max_path:Word;
  max_file:Word;
  fs_flags:Word;
 end;

const
 MAX_PATH=260;
type
 TLfnBuf=array[0..MAX_PATH-1] of Char;

const	{ExtraInfo code for FindFirst/FindNext}
 CF_NoConvert=1;
const	{indices for Get/SetFileAttributes}
 FA_GetAttr=0;
 FA_SetAttr=1;
 FA_GetPhysSize=2;
 FA_SetTimeM=3;
 FA_GetTimeM=4;
 FA_SetTimeA=5;
 FA_GetTimeA=6;
 FA_SetTimeC=7;
 FA_GetTimeC=8;
const	{ExtraInfo codes for CreateFile}
 CF_Opened=1;
 CF_Created=2;
 CF_Truncated=3;
const	{TranslateName codes}
 TN_SubstDrive=$8000;
 TN_Truename=0;
 TN_Longname=1;
 TN_Shortname=2;


function MakeDirectory(dname:PChar):Boolean;
function RemoveDirectory(dname:PChar):Boolean;
function ChangeDirectory(dname:PChar):Boolean;
function GetCurrentDirectory(drive:Byte; dname:PChar):Boolean;

function DeleteFile(fname:PChar):Boolean;
function DeleteFiles(filter:PChar; attr:Word):Boolean;
function GetFileAttributes(fname:PChar; index:Word; var fa:LongInt):Boolean;
function SetFileAttributes(fname:PChar; index:Word; fa:LongInt):Boolean;
function MoveFile(src,dst:PChar):Boolean;

function FindFirstFile(filter:PChar; attr:Word; var fd:TWin32FindData):Word;
function FindNextFile(h: Word; var fd: TWin32FindData):Boolean;
function FindClose(h: Word):Boolean;

function CreateFile(fname:PChar; attr,creat,share:Word):Word;

function TranslateName(fname,tname:PChar;how:Word):Boolean;
{function CreateAlias(fname,alias:PChar):Boolean;}

function GetVolumeInformation(fname:PChar; var vi:TVolumeInformation):Boolean;
function FileTimeConvert(var t:LongLong; how:Boolean):Boolean;

implementation

function SetDOSError:Boolean; assembler;
 asm	mov	dx,0
	jc	@@err
	xchg	dx,ax		{ohne Fehler [DosError]=0 und DX=Handle}
@@err:	mov	[DosError],ax
	db	0D6h		{SetALC}
	inc	al
 end;

{$IFDEF Windows}
procedure AnsiOemSt; near; assembler;
{Name ES:SI auf Stack konvertieren, PA: SS:SP=OEM-Name, VR: alle auer AX}
 asm	pop	di		{Rcksprung!}
	push	ax
	push	es
	 push	es
	 push	si
	 call	lstrlen		{Lnge in AX}
	pop	es
	pop	cx
	inc	ax
	inc	ax
	and	al,not 1	{gerade aufrunden}
	sub	sp,ax
	mov	ax,sp
	push	cx
	 push	es
	 push	si
	 push	ss
	 push	ax
	 call	AnsiToOem
	pop	ax
	jmp	di
 end;

procedure AnsiOem; assembler;	{von DS:SI nach SS:AX}
 asm	push	es
	 push	ds
	 push	si
	 push	ss
	 push	ax
	 call	AnsiToOem
	pop	es
 end;

procedure CallDOS_DSDX; assembler;
 var
  OemBuf: TLfnBuf;
 asm	push	ds
	 pusha		{hier: AX,BX,CX,DX,SI}
	  mov	si,dx
	  lds	si,ss:[si]
	  lea	ax,OemBuf
	  call	AnsiOem
	 popa
	 push	ss
	 pop	ds
	 lea	dx,OemBuf
	 stc
	 int	21h
	pop	ds
	call	SetDosError
 end;

procedure CallDOS_DSSI; assembler;
 var
  OemBuf: TLfnBuf;
 asm	push	ds
	 pusha		{hier: AX,BX,CX,DX}
	  lds	si,ss:[si]
	  lea	ax,OemBuf
	  call	AnsiOem
	 popa
	 push	ss
	 pop	ds
	 lea	si,OemBuf
	 stc
	 int	21h
	pop	ds
	call	SetDosError
 end;

procedure OemAnsi; assembler;
 asm	push	ax
	 push	es
	 push	bx
	 push	es
	 push	bx
	 call	OemToAnsi
	pop	ax
 end;
{$ELSE}
procedure CallDOS_DSDX; assembler;
 asm	push	ds
	 push	si
	  mov	si,dx
	  lds	dx,ss:[si]
	 pop	si
	 stc
	 int	21h
	pop	ds
	call	SetDosError
 end;

procedure CallDOS_DSSI; assembler;
 asm	push	ds
	 lds	si,ss:[si]
	 stc
	 int	21h
	pop	ds
	call	SetDosError
 end;
{$ENDIF}

function MakeDirectory(dname:PChar):Boolean; assembler;
 asm	lea	dx,dname
	mov	ax,7139h
	call	CallDOS_DSDX
 end;

function RemoveDirectory(dname:PChar):Boolean; assembler;
 asm	lea	dx,dname
	mov	ax,713Ah
	call	CallDOS_DSDX
 end;

function ChangeDirectory(dname:PChar):Boolean; assembler;
 asm	lea	dx,dname
	mov	ax,713Bh
	call	CallDOS_DSDX
 end;

function GetCurrentDirectory(drive:Byte; dname:PChar):Boolean; assembler;
 asm	push	ds
	 mov	dl,[drive]	{0=current, 1='A' etc.}
	 mov	al,dl
	 dec	al
	 jns	@@1
	 mov	ah,19h
	 int	21h
@@1:	 add	al,'A'
	 lds	si,[dname]
	 mov	byte ptr [si],al
	 inc	si
	 mov	word ptr [si],'\:'
	 inc	si
	 inc	si
	 mov	ax,7147h
	 stc
	 int	21h
	pop	ds
	call	SetDosError
{$IFDEF Windows}
	jc	@@e
	les	bx,[dname]
	call	OemAnsi
@@e:
{$ENDIF}
 end;

function DeleteFile(fname:PChar):Boolean; assembler;
 asm	xor	si,si
	lea	dx,fname
	mov	ax,7141h
	call	CallDOS_DSDX
 end;

function DeleteFiles(filter:PChar; attr:Word):Boolean; assembler;
 asm	mov	si,1
	lea	dx,filter
	mov	cx,[attr]
	mov	ax,7141h
	call	CallDOS_DSDX
 end;

function GetFileAttributes(fname:PChar; index:Word; var fa:LongInt):Boolean; assembler;
 asm
 end;

function SetFileAttributes(fname:PChar; index:Word; fa:LongInt):Boolean; assembler;
 asm
 end;

function MoveFile(src,dst:PChar):Boolean; assembler;
{$IFDEF Windows}
 var
  OemBuf: TLfnBuf;
{$ENDIF}
 asm	les	di,[dst]
{$IFDEF Windows}
	lea	bx,OemBuf
	push	ss
	push	bx
	 push	es
	 push	di
	 push	ss
	 push	bx
	 call	AnsiToOem
	pop	di
	pop	es
{$ENDIF}
	mov	ax,7156h
	lea	dx,src
	call    CallDOS_DSDX
 end;

procedure EndSearch; assembler;
 asm	jc	@@e
	mov	[ExtraInfo],cx
{$IFDEF Windows}
	lea	bx,TWin32FindData[di].namel
	push	es
	 call	OemAnsi
	pop	es
	lea	bx,TWin32FindData[di].names
	call	OemAnsi
{$ENDIF}
@@e:
 end;

function FindFirstFile; assembler;
 asm	mov	cx,[attr]
	lea	dx,filter
	mov	si,[DateFormat]
	les	di,[fd]
	mov	ax,714Eh
	call	CallDOS_DSDX
	xchg	dx,ax
	call	EndSearch
 end;

function FindNextFile; assembler;
 asm	mov	bx,[h]
	mov	si,[DateFormat]
	les	di,[fd]
	stc
	mov	ax,714Fh
	int	21h
	call	SetDosError
	call	EndSearch
 end;
function FindClose; assembler;
 asm	mov	bx,[h]
	stc
	mov	ax,71A1h
	int	21h
	call	SetDosError
 end;



function TranslateName; assembler;
 asm	xor	bx,bx
	mov	cx,[how]
	xchg	bl,cl
	lea	si,fname
	les	di,[tname]
	mov	ax,7160h
	call	CallDOS_DSSI
{$IFDEF Windows}
	jc	@@e
	mov	bx,di
	call	OemAnsi
@@e:
{$ENDIF}
 end;

function CreateFile(fname:PChar; attr,creat,share:Word):Word; assembler;
 asm	mov	bx,[creat]
	mov	cx,[attr]
	mov	dx,[share]
	lea	si,fname
	mov	di,[AliasHint]
	mov	ax,716Ch
	call	CallDOS_DSSI
	xchg	dx,ax
	jc	@@e
	mov	[ExtraInfo],cx
@@e:
 end;

function GetVolumeInformation(fname:PChar; var vi:TVolumeInformation):Boolean; assembler;
 asm	mov	cx,16
	lea	dx,fname
	les	di,[vi]
	mov	ax,71A0h
	call	CallDOS_DSDX
	jc	@@e
	mov	es:TVolumeInformation[di].max_path,dx
	mov	es:TVolumeInformation[di].max_file,cx
	mov	es:TVolumeInformation[di].fs_flags,bx
@@e:
 end;

function FileTimeConvert(var t:LongLong; how:Boolean):Boolean; assembler;
 asm	mov	bl,[how]
 end;

end.
Detected encoding: UTF-80