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110 lines
2.6 KiB
110 lines
2.6 KiB
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2021 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <wx/tarstrm.h>
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#include <wx/wfstream.h>
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#include <wx/zstream.h>
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#include <asset_archive.h>
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ASSET_ARCHIVE::ASSET_ARCHIVE( const wxString& aFilePath, bool aLoadNow ) :
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m_filePath( aFilePath )
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{
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if( aLoadNow )
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Load();
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}
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bool ASSET_ARCHIVE::Load()
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{
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// We don't support hot-reloading yet
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if( !m_fileInfoCache.empty() )
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return false;
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wxFFileInputStream zipFile( m_filePath );
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if( !zipFile.IsOk() )
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return false;
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wxZlibInputStream stream( zipFile, wxZLIB_GZIP );
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wxTarInputStream tarStream( stream );
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wxTarEntry* entry;
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// Avoid realloc while reading: we're not going to get better than 2:1 compression
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m_cache.resize( 2 * zipFile.GetLength() );
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size_t offset = 0;
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while( ( entry = tarStream.GetNextEntry() ) )
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{
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if( entry->IsDir() )
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{
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delete entry;
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continue;
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}
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size_t length = entry->GetSize();
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FILE_INFO fi;
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fi.offset = offset;
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fi.length = length;
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if( offset + length > m_cache.size() )
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m_cache.resize( m_cache.size() * 2 );
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tarStream.Read( &m_cache[offset], length );
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m_fileInfoCache[entry->GetName()] = fi;
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offset += length;
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delete entry;
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}
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m_cache.resize( offset );
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return true;
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}
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long ASSET_ARCHIVE::GetFileContents( const wxString& aFilePath, const unsigned char* aDest,
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size_t aMaxLen )
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{
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wxFAIL_MSG( "Unimplemented" );
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return 0;
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}
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long ASSET_ARCHIVE::GetFilePointer( const wxString& aFilePath, const unsigned char** aDest )
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{
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if( aFilePath.IsEmpty() )
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return -1;
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wxASSERT( aDest );
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if( !m_fileInfoCache.count( aFilePath ) )
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return -1;
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const FILE_INFO& fi = m_fileInfoCache.at( aFilePath );
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*aDest = &m_cache[fi.offset];
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return fi.length;
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}
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