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// Game_Music_Emu 0.5.2. http://www.slack.net/~ant/
#include "Gme_File.h"
#include "blargg_endian.h"
#include <string.h>
/* Copyright (C) 2003-2006 Shay Green. This module is free software; you
can redistribute it and/or modify it under the terms of the GNU Lesser
General Public License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version. This
module 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 Lesser General Public License for more
details. You should have received a copy of the GNU Lesser General Public
License along with this module; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
#include "blargg_source.h"
const char gme_wrong_file_type [] = "Wrong file type for this emulator";
void Gme_File::clear_playlist()
{
playlist.clear();
clear_playlist_();
track_count_ = raw_track_count_;
}
void Gme_File::unload()
{
clear_playlist(); // *before* clearing track count
track_count_ = 0;
raw_track_count_ = 0;
file_data.clear();
}
Gme_File::Gme_File()
{
type_ = 0;
user_data_ = 0;
user_cleanup_ = 0;
unload(); // clears fields
blargg_verify_byte_order(); // used by most emulator types, so save them the trouble
}
Gme_File::~Gme_File()
{
if ( user_cleanup_ )
user_cleanup_( user_data_ );
}
blargg_err_t Gme_File::load_mem_( byte const* data, long size )
{
require( data != file_data.begin() ); // load_mem_() or load_() must be overridden
Mem_File_Reader in( data, size );
return load_( in );
}
blargg_err_t Gme_File::load_( Data_Reader& in )
{
RETURN_ERR( file_data.resize( in.remain() ) );
RETURN_ERR( in.read( file_data.begin(), file_data.size() ) );
return load_mem_( file_data.begin(), file_data.size() );
}
// public load functions call this at beginning
void Gme_File::pre_load() { unload(); }
void Gme_File::post_load_() { }
// public load functions call this at end
blargg_err_t Gme_File::post_load( blargg_err_t err )
{
if ( !track_count() )
set_track_count( type()->track_count );
if ( !err )
post_load_();
else
unload();
return err;
}
// Public load functions
blargg_err_t Gme_File::load_mem( void const* in, long size )
{
pre_load();
return post_load( load_mem_( (byte const*) in, size ) );
}
blargg_err_t Gme_File::load( Data_Reader& in )
{
pre_load();
return post_load( load_( in ) );
}
blargg_err_t Gme_File::load_file( const char* path )
{
pre_load();
GME_FILE_READER in;
RETURN_ERR( in.open( path ) );
return post_load( load_( in ) );
}
blargg_err_t Gme_File::load_remaining_( void const* h, long s, Data_Reader& in )
{
Remaining_Reader rem( h, s, &in );
return load( rem );
}
// Track info
void Gme_File::copy_field_( char* out, const char* in, int in_size )
{
if ( !in || !*in )
return;
// remove spaces/junk from beginning
while ( in_size && unsigned (*in - 1) <= ' ' - 1 )
{
in++;
in_size--;
}
// truncate
if ( in_size > max_field_ )
in_size = max_field_;
// find terminator
int len = 0;
while ( len < in_size && in [len] )
len++;
// remove spaces/junk from end
while ( len && unsigned (in [len - 1]) <= ' ' )
len--;
// copy
out [len] = 0;
memcpy( out, in, len );
// strip out stupid fields that should have been left blank
if ( !strcmp( out, "?" ) || !strcmp( out, "<?>" ) || !strcmp( out, "< ? >" ) )
out [0] = 0;
}
void Gme_File::copy_field_( char* out, const char* in )
{
copy_field_( out, in, max_field_ );
}
blargg_err_t Gme_File::remap_track_( int* track_io ) const
{
if ( (unsigned) *track_io >= (unsigned) track_count() )
return "Invalid track";
if ( (unsigned) *track_io < (unsigned) playlist.size() )
{
M3u_Playlist::entry_t const& e = playlist [*track_io];
*track_io = 0;
if ( e.track >= 0 )
{
*track_io = e.track;
if ( !(type_->flags_ & 0x02) )
*track_io -= e.decimal_track;
}
if ( *track_io >= raw_track_count_ )
return "Invalid track in m3u playlist";
}
else
{
check( !playlist.size() );
}
return 0;
}
blargg_err_t Gme_File::track_info( track_info_t* out, int track ) const
{
out->track_count = track_count();
out->length = -1;
out->loop_length = -1;
out->intro_length = -1;
out->song [0] = 0;
out->game [0] = 0;
out->author [0] = 0;
out->copyright [0] = 0;
out->comment [0] = 0;
out->dumper [0] = 0;
out->system [0] = 0;
copy_field_( out->system, type()->system );
int remapped = track;
RETURN_ERR( remap_track_( &remapped ) );
RETURN_ERR( track_info_( out, remapped ) );
// override with m3u info
if ( playlist.size() )
{
M3u_Playlist::info_t const& i = playlist.info();
copy_field_( out->game , i.title );
copy_field_( out->author, i.engineer );
copy_field_( out->author, i.composer );
copy_field_( out->dumper, i.ripping );
M3u_Playlist::entry_t const& e = playlist [track];
copy_field_( out->song, e.name );
if ( e.length >= 0 ) out->length = e.length * 1000L;
if ( e.intro >= 0 ) out->intro_length = e.intro * 1000L;
if ( e.loop >= 0 ) out->loop_length = e.loop * 1000L;
}
return 0;
}
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