kicad/common/plugins/altium/altium_parser.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2019-2020 Thomas Pointhuber <thomas.pointhuber@gmx.at>
* Copyright (C) 2020 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef ALTIUM_PARSER_H
#define ALTIUM_PARSER_H
#include <map>
#include <memory>
#include <math/util.h>
#include <wx/gdicmn.h>
namespace CFB
{
class CompoundFileReader;
struct COMPOUND_FILE_ENTRY;
} // namespace CFB
// Helper method to find file inside compound file
const CFB::COMPOUND_FILE_ENTRY* FindStream(
const CFB::CompoundFileReader& aReader, const char* aStreamName );
class ALTIUM_PARSER
{
public:
ALTIUM_PARSER( const CFB::CompoundFileReader& aReader, const CFB::COMPOUND_FILE_ENTRY* aEntry );
~ALTIUM_PARSER() = default;
template <typename Type>
Type Read()
{
if( GetRemainingBytes() >= sizeof( Type ) )
{
Type val = *(Type*) ( m_pos );
m_pos += sizeof( Type );
return val;
}
else
{
m_error = true;
return 0;
}
}
wxString ReadWxString()
{
uint8_t len = Read<uint8_t>();
if( GetRemainingBytes() >= len )
{
//altium uses LATIN1/ISO 8859-1, convert it
wxString val = wxString( m_pos, wxConvISO8859_1, len );
m_pos += len;
return val;
}
else
{
m_error = true;
return wxString( "" );
}
}
int32_t ReadKicadUnit()
{
return ConvertToKicadUnit( Read<int32_t>() );
}
int32_t ReadKicadUnitX()
{
return ReadKicadUnit();
}
int32_t ReadKicadUnitY()
{
return -ReadKicadUnit();
}
wxPoint ReadWxPoint()
{
int32_t x = ReadKicadUnitX();
int32_t y = ReadKicadUnitY();
return { x, y };
}
wxSize ReadWxSize()
{
int32_t x = ReadKicadUnit();
int32_t y = ReadKicadUnit();
return { x, y };
}
size_t ReadAndSetSubrecordLength()
{
uint32_t length = Read<uint32_t>();
m_subrecord_end = m_pos + length;
return length;
}
std::map<wxString, wxString> ReadProperties();
static int32_t ConvertToKicadUnit( const double aValue )
{
const double int_limit = ( std::numeric_limits<int>::max() - 1 ) / 2.54;
int32_t iu = KiROUND( Clamp<double>( -int_limit, aValue, int_limit ) * 2.54 );
// Altium stores metric units up to 0.001mm (1000nm) in accuracy. This code fixes rounding errors.
// Because imperial units > 0.01mil are always even, this workaround should never trigger for them.
switch( iu % 1000 )
{
case 1:
case -999:
return iu - 1;
case 999:
case -1:
return iu + 1;
default:
return iu;
}
}
static int PropertiesReadInt(
const std::map<wxString, wxString>& aProperties, const wxString& aKey, int aDefault );
static double PropertiesReadDouble( const std::map<wxString, wxString>& aProperties,
const wxString& aKey, double aDefault );
static bool PropertiesReadBool(
const std::map<wxString, wxString>& aProperties, const wxString& aKey, bool aDefault );
static int32_t PropertiesReadKicadUnit( const std::map<wxString, wxString>& aProperties,
const wxString& aKey, const wxString& aDefault );
static wxString PropertiesReadString( const std::map<wxString, wxString>& aProperties,
const wxString& aKey, const wxString& aDefault );
void Skip( size_t aLength )
{
if( GetRemainingBytes() >= aLength )
{
m_pos += aLength;
}
else
{
m_error = true;
}
}
void SkipSubrecord()
{
if( m_subrecord_end == nullptr || m_subrecord_end < m_pos )
{
m_error = true;
}
else
{
m_pos = m_subrecord_end;
}
};
size_t GetRemainingBytes() const
{
return m_pos == nullptr ? 0 : m_size - ( m_pos - m_content.get() );
}
size_t GetRemainingSubrecordBytes() const
{
return m_pos == nullptr || m_subrecord_end == nullptr || m_subrecord_end <= m_pos ?
0 :
m_subrecord_end - m_pos;
};
bool HasParsingError()
{
return m_error;
}
private:
std::unique_ptr<char[]> m_content;
size_t m_size;
char* m_pos; // current read pointer
char* m_subrecord_end; // pointer which points to next subrecord start
bool m_error;
};
#endif //ALTIUM_PARSER_H