mirror of
https://github.com/DaedalusX64/daedalus.git
synced 2025-04-02 10:21:48 -04:00
140 lines
3.6 KiB
C++
140 lines
3.6 KiB
C++
/*
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Copyright (C) 2006 StrmnNrmn
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "BuildOptions.h"
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#include "Base/Types.h"
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#include "RomFile/RomFileUncompressed.h"
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//*****************************************************************************
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//
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//*****************************************************************************
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ROMFileUncompressed::ROMFileUncompressed( const std::filesystem::path filename )
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: ROMFile( filename )
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, mFH( NULL )
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, mRomSize( 0 )
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{
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}
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//*****************************************************************************
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//
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//*****************************************************************************
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ROMFileUncompressed::~ROMFileUncompressed()
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{
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if( mFH != NULL )
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{
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fclose( mFH );
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}
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}
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//*****************************************************************************
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//
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//*****************************************************************************
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bool ROMFileUncompressed::Open( COutputStream & messages )
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{
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#ifdef DAEDALUS_ENABLE_ASSERTS
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DAEDALUS_ASSERT( mFH == NULL, "Opening the file twice?" );
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#endif
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// Open the file and read in the data
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mFH = fopen( mFilename.c_str(), "rb" );
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if(mFH == NULL)
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{
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return false;
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}
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//
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// Determine which byteswapping mode to use
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//
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u32 header;
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if( fread( &header, sizeof( u32 ), 1, mFH ) != 1 )
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{
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return false;
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}
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if (!SetHeaderMagic( header ))
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{
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return false;
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}
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//
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// Determine the rom size
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//
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fseek( mFH, 0, SEEK_END );
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mRomSize = ftell( mFH );
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fseek( mFH, 0, SEEK_SET );
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if (s32(mRomSize) == -1)
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{
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return false;
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}
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return true;
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}
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//*****************************************************************************
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//
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//*****************************************************************************
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bool ROMFileUncompressed::LoadRawData( u32 bytes_to_read, u8 *p_bytes, COutputStream & messages )
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{
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#ifdef DAEDALUS_ENABLE_ASSERTS
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DAEDALUS_ASSERT( mFH != NULL, "Reading data when Open failed?" );
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#endif
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if (p_bytes == NULL)
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{
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return false;
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}
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// Try and read in data - reset to the start of the file
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fseek( mFH, 0, SEEK_SET );
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u32 bytes_read( fread( p_bytes, 1, bytes_to_read, mFH ) );
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if (bytes_read != bytes_to_read)
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{
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#ifdef DAEDALUS_ENABLE_ASSERTS
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DAEDALUS_ASSERT(false, "Bytes to read don't match bytes read!");
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#endif
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return false;
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}
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// Apply the bytesswapping before returning the buffer
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CorrectSwap( p_bytes, bytes_to_read );
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return true;
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}
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//*****************************************************************************
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//
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//*****************************************************************************
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bool ROMFileUncompressed::ReadChunk( u32 offset, u8 * p_dst, u32 length )
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{
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#ifdef DAEDALUS_ENABLE_ASSERTS
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DAEDALUS_ASSERT( mFH != NULL, "Reading data when Open failed?" );
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#endif
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// Try and read in data - reset to the specified offset
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fseek( mFH, offset, SEEK_SET );
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if( fread( p_dst, length, 1, mFH ) != 1 )
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{
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return false;
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}
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// Apply the bytesswapping before returning the buffer
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CorrectSwap( p_dst, length );
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return true;
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}
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