altium_parser.h

Go to the documentation of this file.

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2019-2020 Thomas Pointhuber <[email protected]>
 * Copyright (C) 2020-2023 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 <numeric>
 
#include <wx/mstream.h>
#include <wx/zstream.h>
#include <math/vector2d.h>
#include <vector>
 
#include <string>
#include <stdexcept>
 
namespace CFB
{
class CompoundFileReader;
struct COMPOUND_FILE_ENTRY;
} // namespace CFB
 
std::string FormatPath( const std::vector<std::string>& aVectorPath );
 
 
class ALTIUM_COMPOUND_FILE
{
public:
 ALTIUM_COMPOUND_FILE( const wxString& aFilePath );
 
 ALTIUM_COMPOUND_FILE( const void* aBuffer, size_t aLen );
 
 ALTIUM_COMPOUND_FILE( const ALTIUM_COMPOUND_FILE& temp_obj ) = delete;
 ALTIUM_COMPOUND_FILE& operator=( const ALTIUM_COMPOUND_FILE& temp_obj ) = delete;
 ~ALTIUM_COMPOUND_FILE() = default;
 
 const CFB::CompoundFileReader& GetCompoundFileReader() const { return *m_reader; }
 
 std::unique_ptr<ALTIUM_COMPOUND_FILE> DecodeIntLibStream( const CFB::COMPOUND_FILE_ENTRY& cfe );
 
 std::map<wxString, wxString> ListLibFootprints();
 
 std::tuple<wxString, const CFB::COMPOUND_FILE_ENTRY*> FindLibFootprintDirName( const wxString& aFpUnicodeName );
 
 const CFB::COMPOUND_FILE_ENTRY* FindStream( const std::vector<std::string>& aStreamPath ) const;
 
 const CFB::COMPOUND_FILE_ENTRY* FindStream( const CFB::COMPOUND_FILE_ENTRY* aStart, const std::vector<std::string>& aStreamPath ) const;
 
 const CFB::COMPOUND_FILE_ENTRY* FindStreamSingleLevel( const CFB::COMPOUND_FILE_ENTRY* aEntry,
 const std::string aName,
 const bool aIsStream ) const;
 
 std::map<wxString, const CFB::COMPOUND_FILE_ENTRY*> EnumDir( const std::wstring& aDir ) const;
 
 std::map<wxString, const CFB::COMPOUND_FILE_ENTRY*> GetLibSymbols( const CFB::COMPOUND_FILE_ENTRY* aStart ) const;
 
private:
 
 void cacheLibFootprintNames();
 
 std::unique_ptr<CFB::CompoundFileReader> m_reader;
 std::vector<char> m_buffer;
 
 std::map<wxString, const CFB::COMPOUND_FILE_ENTRY*> m_libFootprintNameCache;
 std::map<wxString, wxString> m_libFootprintDirNameCache;
};
 
 
class ALTIUM_PARSER
{
public:
 ALTIUM_PARSER( const ALTIUM_COMPOUND_FILE& aFile, const CFB::COMPOUND_FILE_ENTRY* aEntry );
 ALTIUM_PARSER( std::unique_ptr<char[]>& aContent, size_t aSize );
 ~ALTIUM_PARSER() = default;
 
 template <typename Type>
 Type Read()
 {
 const size_t remainingBytes = GetRemainingBytes();
 if( remainingBytes >= sizeof( Type ) )
 {
 Type val = *(Type*) ( m_pos );
 m_pos += sizeof( Type );
 return val;
 }
 else
 {
 m_pos += remainingBytes; // Ensure remaining bytes are zero
 m_error = true;
 return 0;
 }
 }
 
 template <typename Type>
 Type Peek()
 {
 char* const oldPos = m_pos;
 const bool oldError = m_error;
 Type result = Read<Type>();
 m_pos = oldPos;
 m_error = oldError;
 return result;
 }
 
 wxScopedCharBuffer ReadCharBuffer()
 {
 uint8_t len = Read<uint8_t>();
 if( GetRemainingBytes() >= len )
 {
 char* buf = new char[len];
 memcpy( buf, m_pos, len );
 m_pos += len;
 
 return wxScopedCharBuffer::CreateOwned( buf, len );
 }
 else
 {
 m_error = true;
 return wxScopedCharBuffer();
 }
 }
 
 wxString ReadWxString()
 {
 // TODO: Identify where the actual code page is stored. For now, this default code page
 // has limited impact, because recent Altium files come with a UTF16 string table
 return wxString( ReadCharBuffer(), wxConvISO8859_1 );
 }
 
 std::map<uint32_t, wxString> ReadWideStringTable()
 {
 std::map<uint32_t, wxString> table;
 size_t remaining = GetRemainingBytes();
 
 while( remaining >= 8 )
 {
 uint32_t index = Read<uint32_t>();
 uint32_t length = Read<uint32_t>();
 wxString str;
 remaining -= 8;
 
 if( length <= 2 )
 length = 0; // for empty strings, not even the null bytes are present
 else
 {
 if( length > remaining )
 break;
 
 str = wxString( m_pos, wxMBConvUTF16LE(), length - 2 );
 }
 
 table.emplace( index, str );
 m_pos += length;
 remaining -= length;
 }
 
 return table;
 }
 
 std::vector<char> ReadVector( size_t aSize )
 {
 if( aSize > GetRemainingBytes() )
 {
 m_error = true;
 return {};
 }
 else
 {
 std::vector<char> data( m_pos, m_pos + aSize );
 m_pos += aSize;
 return data;
 }
 }
 
 int ReadBytes( char* aOut, size_t aSize )
 {
 if( aSize > GetRemainingBytes() )
 {
 m_error = true;
 return 0;
 }
 else
 {
 memcpy( aOut, m_pos, aSize );
 m_pos += aSize;
 return aSize;
 }
 }
 
 int32_t ReadKicadUnit()
 {
 return ConvertToKicadUnit( Read<int32_t>() );
 }
 
 int32_t ReadKicadUnitX()
 {
 return ReadKicadUnit();
 }
 
 int32_t ReadKicadUnitY()
 {
 return -ReadKicadUnit();
 }
 
 VECTOR2I ReadVector2IPos()
 {
 int32_t x = ReadKicadUnitX();
 int32_t y = ReadKicadUnitY();
 return { x, y };
 }
 
 VECTOR2I ReadVector2ISize()
 {
 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(
 std::function<std::map<wxString, wxString>( const std::string& )> handleBinaryData =
 []( const std::string& )
 {
 return std::map<wxString, wxString>();
 } );
 
 static int32_t ConvertToKicadUnit( const double aValue );
 
 static int ReadInt( const std::map<wxString, wxString>& aProps,
 const wxString& aKey, int aDefault );
 
 static double ReadDouble( const std::map<wxString, wxString>& aProps,
 const wxString& aKey, double aDefault );
 
 static bool ReadBool( const std::map<wxString, wxString>& aProps,
 const wxString& aKey, bool aDefault );
 
 static int32_t ReadKicadUnit( const std::map<wxString, wxString>& aProps,
 const wxString& aKey, const wxString& aDefault );
 
 static wxString ReadString( const std::map<wxString, wxString>& aProps,
 const wxString& aKey, const wxString& aDefault );
 
 static wxString ReadUnicodeString( const std::map<wxString, wxString>& aProps,
 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;
};
 
 
class ALTIUM_BINARY_READER
{
public:
 ALTIUM_BINARY_READER( const std::string& binaryData ) : m_data( binaryData ), m_position( 0 ) {}
 
 int32_t ReadInt32()
 {
 if( m_position + sizeof( int32_t ) > m_data.size() )
 throw std::out_of_range( "ALTIUM_BINARY_READER: out of range" );
 
 int32_t value = *reinterpret_cast<const int32_t*>( &m_data[m_position] );
 m_position += sizeof( int32_t );
 return value;
 }
 
 int16_t ReadInt16()
 {
 if( m_position + sizeof( int16_t ) > m_data.size() )
 throw std::out_of_range( "ALTIUM_BINARY_READER: out of range" );
 
 int16_t value = *reinterpret_cast<const int16_t*>( &m_data[m_position] );
 m_position += sizeof( int16_t );
 return value;
 }
 
 uint8_t ReadByte()
 {
 if( m_position + sizeof( uint8_t ) > m_data.size() )
 throw std::out_of_range( "ALTIUM_BINARY_READER: out of range" );
 
 uint8_t value = *reinterpret_cast<const uint8_t*>( &m_data[m_position] );
 m_position += sizeof( uint8_t );
 return value;
 }
 
 std::string ReadPascalString()
 {
 uint8_t length = ReadByte();
 
 if( m_position + length > m_data.size() )
 throw std::out_of_range( "ALTIUM_BINARY_READER: out of range" );
 
 std::string pascalString( &m_data[m_position], &m_data[m_position + length] );
 m_position += length;
 return pascalString;
 }
 
private:
 const std::string& m_data;
 size_t m_position;
};
 
class ALTIUM_COMPRESSED_READER : public ALTIUM_BINARY_READER
{
public:
 ALTIUM_COMPRESSED_READER( const std::string& aData ) : ALTIUM_BINARY_READER( aData )
 {}
 
 std::pair<int, std::string> ReadCompressedString()
 {
 std::string result;
 int id = -1;
 
 while( true )
 {
 uint8_t byte = ReadByte();
 if( byte != 0xD0 )
 throw std::runtime_error( "ALTIUM_COMPRESSED_READER: invalid compressed string" );
 
 std::string str = ReadPascalString();
 
 id = std::stoi( str );
 
 std::string data = ReadPascalString();
 
 result = decompressData( data );
 }
 
 return std::make_pair( id, result );
 }
 
private:
 std::string decompressData( std::string& aData )
 {
 // Create a memory input stream with the buffer
 wxMemoryInputStream memStream( (void*) aData.data(), aData.length() );
 
 // Create a zlib input stream with the memory input stream
 wxZlibInputStream zStream( memStream );
 
 // Prepare a string to hold decompressed data
 std::string decompressedData;
 
 // Read decompressed data from the zlib input stream
 while( !zStream.Eof() )
 {
 char buffer[1024];
 zStream.Read( buffer, sizeof( buffer ) );
 size_t bytesRead = zStream.LastRead();
 decompressedData.append( buffer, bytesRead );
 }
 
 return decompressedData;
 }
};
 
#endif //ALTIUM_PARSER_H