1 files changed, 53 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libgme/gb_cpu.c b/lib/rbcodec/codecs/libgme/gb_cpu.c
new file mode 100644
index 0000000000..4b2df63a17
--- /dev/null
+++ b/lib/rbcodec/codecs/libgme/gb_cpu.c
@@ -0,0 +1,53 @@
+// Game_Music_Emu 0.6-pre. http://www.slack.net/~ant/
+
+#include "gb_cpu.h"
+
+#include "blargg_endian.h"
+
+/* Copyright (C) 2003-2008 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"
+
+static inline void set_code_page( struct Gb_Cpu* this, int i, void* p )
+{
+        byte* p2 = STATIC_CAST(byte*,p) - GB_CPU_OFFSET( i * page_size );
+        this->cpu_state_.code_map [i] = p2;
+        this->cpu_state->code_map [i] = p2;
+}
+
+void Cpu_reset( struct Gb_Cpu* this, void* unmapped )
+{
+        check( this->cpu_state == &this->cpu_state_ );
+        this->cpu_state = &this->cpu_state_;
+        
+        this->cpu_state_.time = 0;
+        
+        int i;
+        for ( i = 0; i < page_count + 1; ++i )
+                set_code_page( this, i, unmapped );
+        
+        memset( &this->r, 0, sizeof this->r );
+        
+        blargg_verify_byte_order();
+}
+
+void Cpu_map_code( struct Gb_Cpu* this, addr_t start, int size, void* data )
+{
+        // address range must begin and end on page boundaries
+        require( start % page_size == 0 );
+        require( size  % page_size == 0 );
+        require( start + size <= mem_size );
+        
+        int offset;
+        for ( offset = 0; offset < size; offset += page_size )
+                set_code_page( this, (start + offset) >> page_bits, STATIC_CAST(char*,data) + offset );
+}