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{ MIME Streams
CopyRight (C) 2006-2008 Micha Nelissen
This library is Free software; you can rediStribute it and/or modify it
under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
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. See the GNU Library General Public License
for more details.
You should have received a Copy of the GNU Library General Public License
along with This library; if not, Write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
This license has been modified. See File LICENSE.ADDON for more inFormation.
Should you find these sources without a LICENSE File, please contact
me at ales@chello.sk
}
unit lMimeStreams;
{$mode objfpc}{$H+}
interface
uses
Classes;
const
CRLF = #13#10;
type
TStreamNotificationEvent = procedure(const aSize: Integer) of object;
{ TMimeOutputStream }
TMimeOutputStream = class(TStream)
protected
FInputData: string;
FNotificationEvent: TStreamNotificationEvent;
function GetSize: Int64; override;
procedure AddInputData(const s: string);
public
constructor Create(aNotificationEvent: TStreamNotificationEvent);
function Read(var Buffer; Count: Longint): Longint; override;
function Write(const Buffer; Count: Longint): Longint; override;
function Seek(Offset: Longint; Origin: Word): Longint; overload; override;
function Seek(const Offset: Int64; Origin: TSeekOrigin): Int64; overload; override;
procedure Reset;
end;
{ TBogusStream }
TBogusStream = class(TStream)
protected
FData: string;
function GetSize: Int64; override;
public
function Read(var Buffer; Count: Longint): Longint; override;
function Write(const Buffer; Count: Longint): Longint; override;
function Seek(Offset: Longint; Origin: Word): Longint; overload; override;
function Seek(const Offset: Int64; Origin: TSeekOrigin): Int64; overload; override;
procedure Reset;
end;
function EncodeMimeHeaderText(const s: string): string;
implementation
uses
Math;
type
TByteArray = array of Byte;
function EncodeMimeHeaderText(const s: string): string;
begin
Result := s;
end;
{ TMimeOutputStream }
function TMimeOutputStream.GetSize: Int64;
begin
Result := Length(FInputData);
end;
procedure TMimeOutputStream.AddInputData(const s: string);
{ function RightPos(const What, Where: string): Integer;
var
i, j: Integer;
begin
Result := 0;
j := Length(What);
for i := Length(Where) downto 1 do
if Where[i] = What[j] then begin
Dec(j);
if j = 0 then Exit(i);
end else
j := Length(What);
end;
var
n: Integer;}
begin
{ n := RightPos(CRLF, s);
if n > 0 then
Inc(FLastCRLF, (Length(FInputData) - FLastCRLF) + n);}
FInputData := FInputData + s;
{ while Length(FInputData) - FLastCRLF >= 74 do begin
Insert(CRLF, FInputData, FLastCRLF + 75);
Inc(FLastCRLF, 77);
end;}
end;
constructor TMimeOutputStream.Create(aNotificationEvent: TStreamNotificationEvent);
begin
inherited Create;
FNotificationEvent := aNotificationEvent;
end;
function TMimeOutputStream.Read(var Buffer; Count: Longint): Longint;
begin
if Assigned(FNotificationEvent) then
FNotificationEvent(Count);
Result := Min(Count, Length(FInputData));
if Result <= 0 then
Exit(0);
Move(FInputData[1], Buffer, Result);
Delete(FInputData, 1, Result);
end;
function TMimeOutputStream.Write(const Buffer; Count: Longint): Longint;
var
s: string;
begin
SetLength(s, Count);
Move(Buffer, s[1], Count);
AddInputData(s);
Result := Count;
end;
function TMimeOutputStream.Seek(Offset: Longint; Origin: Word): Longint;
begin
Result := Offset;
end;
function TMimeOutputStream.Seek(const Offset: Int64; Origin: TSeekOrigin
): Int64;
begin
Result := Offset;
end;
procedure TMimeOutputStream.Reset;
begin
FInputData := '';
end;
{ TBogusStream }
function TBogusStream.GetSize: Int64;
begin
Result := Length(FData);
end;
function TBogusStream.Read(var Buffer; Count: Longint): Longint;
begin
Result := Min(Count, Length(FData));
Move(FData[1], Buffer, Result);
Delete(FData, 1, Result);
end;
function TBogusStream.Write(const Buffer; Count: Longint): Longint;
var
l: Integer;
begin
l := Length(FData);
Result := Count;
SetLength(FData, l + Count);
Inc(l);
Move(Buffer, FData[l], Count);
end;
function TBogusStream.Seek(Offset: Longint; Origin: Word): Longint;
begin
Result := Offset;
end;
function TBogusStream.Seek(const Offset: Int64; Origin: TSeekOrigin): Int64;
begin
Result := Offset;
end;
procedure TBogusStream.Reset;
begin
FData := '';
end;
end.
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