//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.4 (Public License)
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
//
// Anti-Grain Geometry - Version 2.4 Release Milano 3 (AggPas 2.4 RM3)
// Pascal Port By: Milan Marusinec alias Milano
//                 milan@marusinec.sk
//                 http://www.aggpas.org
// Copyright (c) 2005-2006
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
//----------------------------------------------------------------------------
// Contact: mcseem@antigrain.com
//          mcseemagg@yahoo.com
//          http://www.antigrain.com
//
// [Pascal Port History] -----------------------------------------------------
//
// 23.06.2006-Milano: ptrcomp adjustments
// 24.04.2006-Milano: Unit port establishment
//
{ agg_svg_exception.pas }
unit
 agg_svg_exception ;

INTERFACE

{$I agg_mode.inc }

uses
 SysUtils ,
 agg_basics ;

{ TYPES DEFINITION }
type
 svg_exception_ptr = ^svg_exception;
 svg_exception = class(Exception )
   m_msg : pointer;

   constructor Construct; overload;
   constructor Construct(fmt : PChar ); overload;
   constructor Construct(exc : svg_exception_ptr ); overload;

   procedure Free;
   function  _msg : char_ptr;

  end;

{ GLOBAL PROCEDURES }
 function  get_double(ptr : agg_basics.char_ptr ) : double;
 

IMPLEMENTATION
{ LOCAL VARIABLES & CONSTANTS }
{ UNIT IMPLEMENTATION }
{ CONSTRUCT }
constructor svg_exception.Construct;
begin
 m_msg:=NIL;

end;

{ CONSTRUCT }
constructor svg_exception.Construct(fmt : PChar );
var
 max : int;

begin
 m_msg:=NIL;

 if agg_getmem(m_msg ,4096 ) then
  begin
   max:=StrLen(fmt );

   if max > 4095 then
    max:=4095;

   move(fmt[0 ] ,m_msg^ ,max );

   int8_ptr(ptrcomp(m_msg ) + max )^:=0;

  end;

end;

{ CONSTRUCT }
constructor svg_exception.Construct(exc : svg_exception_ptr );
var
 max : int;

begin
 m_msg:=NIL;

 if (exc <> NIL ) and
    (exc.m_msg <> NIL ) then
  if agg_getmem(m_msg ,4096 ) then
   begin
    max:=StrLen(exc.m_msg );

    if max > 4095 then
     max:=4095;

    move(exc.m_msg^ ,m_msg^ ,max );

    int8_ptr(ptrcomp(m_msg ) + max )^:=0;

   end;

end;

{ FREE }
procedure svg_exception.Free;
begin
 if m_msg <> NIL then
  agg_freemem(m_msg ,4096 );

end;

{ _MSG }
function svg_exception._msg;
begin
 result:=char_ptr(m_msg );

end;

{ GET_DOUBLE }
function get_double;
var
 buf : array[0..49 ] of char;
 dst ,
 max : char_ptr;
 err : integer;

begin
 dst:=@buf[0 ];
 max:=@buf[48 ];

 while ptr^ <> #0 do
  begin
   case ptr^ of
    '-' ,'.' ,'0'..'9' :
     if dst <> max then
      begin
       dst^:=ptr^;

       inc(ptrcomp(dst ) );

      end
     else
      break;

    else
     break;

   end;

   inc(ptrcomp(ptr ) );

  end;

 dst^:=#0; 

 val(PChar(@buf[0 ] ) ,result ,err );

end;

END.