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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright The 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <wx/tarstrm.h>
#include <wx/wfstream.h>
#include <wx/zstream.h>
#include <asset_archive.h>
ASSET_ARCHIVE::ASSET_ARCHIVE( const wxString& aFilePath, bool aLoadNow ) :
m_filePath( aFilePath )
{
if( aLoadNow )
Load();
}
bool ASSET_ARCHIVE::Load()
{
// We don't support hot-reloading yet
if( !m_fileInfoCache.empty() )
return false;
wxFFileInputStream zipFile( m_filePath );
if( !zipFile.IsOk() )
return false;
wxZlibInputStream stream( zipFile, wxZLIB_GZIP );
wxTarInputStream tarStream( stream );
wxTarEntry* entry;
// Avoid realloc while reading: we're not going to get better than 2:1 compression
m_cache.resize( 2 * zipFile.GetLength() );
size_t offset = 0;
while( ( entry = tarStream.GetNextEntry() ) != nullptr )
{
if( entry->IsDir() )
{
delete entry;
continue;
}
size_t length = entry->GetSize();
FILE_INFO fi;
fi.offset = offset;
fi.length = length;
if( offset + length > m_cache.size() )
m_cache.resize( m_cache.size() * 2 );
tarStream.Read( &m_cache[offset], length );
m_fileInfoCache[entry->GetName()] = fi;
offset += length;
delete entry;
}
m_cache.resize( offset );
return true;
}
long ASSET_ARCHIVE::GetFileContents( const wxString& aFilePath, const unsigned char* aDest,
size_t aMaxLen )
{
wxFAIL_MSG( wxS( "Unimplemented" ) );
return 0;
}
long ASSET_ARCHIVE::GetFilePointer( const wxString& aFilePath, const unsigned char** aDest )
{
if( aFilePath.IsEmpty() )
return -1;
wxASSERT( aDest );
if( !m_fileInfoCache.count( aFilePath ) )
return -1;
const FILE_INFO& fi = m_fileInfoCache.at( aFilePath );
*aDest = &m_cache[fi.offset];
return fi.length;
}
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