1 files changed, 68 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libgme/rom_data.c b/lib/rbcodec/codecs/libgme/rom_data.c
new file mode 100644
index 0000000000..9c36a99d2d
--- /dev/null
+++ b/lib/rbcodec/codecs/libgme/rom_data.c
@@ -0,0 +1,68 @@
+// Game_Music_Emu 0.5.2. http://www.slack.net/~ant/
+
+#include "rom_data.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 <string.h>
+#include "blargg_source.h"
+
+// Rom_Data
+
+blargg_err_t Rom_load( struct Rom_Data* this, const void* data, long size,
+                int header_size, void* header_out, int fill )
+{
+        int file_offset = this->pad_size;
+        
+        this->rom_addr = 0;
+        this->mask     = 0;
+        this->size    = 0;
+        
+        if ( size <= header_size ) // <= because there must be data after header
+                return gme_wrong_file_type;
+        
+        // Read header
+        memcpy( header_out, data, header_size );
+        
+        this->file_size = size - header_size;
+        this->file_data = (byte*) data + header_size;
+        
+        memset( this->unmapped, fill, this->rom_size );
+        memcpy( &this->unmapped [file_offset], this->file_data, 
+                this->file_size < this->pad_size ? this->file_size : this->pad_size );
+        
+        return 0;
+}
+
+void Rom_set_addr( struct Rom_Data* this, int addr )
+{
+        this->rom_addr = addr - this->bank_size - pad_extra;
+        
+        int rounded = (addr + this->file_size + this->bank_size - 1) / this->bank_size * this->bank_size;
+        if ( rounded <= 0 )
+        {
+                rounded = 0;
+        }
+        else
+        {
+                int shift = 0;
+                unsigned int max_addr = (unsigned int) (rounded - 1);
+                while ( max_addr >> shift )
+                        shift++;
+                this->mask = (1L << shift) - 1;
+        }
+        
+        if ( addr < 0 )
+                addr = 0;
+        this->size = rounded;
+        this->rsize_ = rounded - this->rom_addr + pad_extra;
+}