/*
JPC: An x86 PC Hardware Emulator for a pure Java Virtual Machine
Release Version 2.4
A project from the Physics Dept, The University of Oxford
Copyright (C) 2007-2010 The University of Oxford
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as published by
the Free Software Foundation.
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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Details (including contact information) can be found at:
jpc.sourceforge.net
or the developer website
sourceforge.net/projects/jpc/
Conceived and Developed by:
Rhys Newman, Ian Preston, Chris Dennis
End of licence header
*/
package org.jpc.emulator.execution.codeblock;
import org.jpc.emulator.processor.Processor;
import org.jpc.emulator.memory.AddressSpace;
/**
*
* @author Chris Dennis
*/
class SpanningVirtual8086ModeCodeBlock extends SpanningCodeBlock implements Virtual8086ModeCodeBlock
{
private PeekableMemoryStream byteSourceStream = new PeekableMemoryStream();
private CodeBlockFactory[] factories;
public SpanningVirtual8086ModeCodeBlock(CodeBlockFactory[] factories)
{
this.factories = factories;
}
public CodeBlock decode(Processor cpu)
{
Virtual8086ModeCodeBlock block = null;
AddressSpace memory = cpu.linearMemory;
int address = cpu.getInstructionPointer();
for (int i = 0; (i < factories.length) && (block == null); i++) {
try {
byteSourceStream.set(memory, address);
block = factories[i].getVirtual8086ModeCodeBlock(byteSourceStream);
} catch (IllegalStateException e) {}
}
byteSourceStream.set(null, 0);
return block;
}
public String toString()
{
return "Spanning Virtual8086 Mode CodeBlock";
}
}