instructionset.h

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2003 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef DXR3PLAYER_DVD_VM_INSTRUCTIONSET
#define DXR3PLAYER_DVD_VM_INSTRUCTIONSET
//------------------------------------------------------------------------------

#include "dvd/vm/Instruction.h"

#include <cstdlib>

//------------------------------------------------------------------------------

namespace dvd { namespace vm {

//------------------------------------------------------------------------------

class Instruction;

//------------------------------------------------------------------------------

/**
 * Instruction set.
 */
class InstructionSet
{
private:
    /**
     * The instructions
     */
    const Instruction* instructions;

    /**
     * The number of instructions.
     */
    size_t length;

public:
    /**
     * Construct an empty instruction set.
     */
    InstructionSet();

    /**
     * Construct the instruction set
     */
    InstructionSet(const Instruction* instructions,
                   size_t length = 1);

    /**
     * Reset the instruction set.
     */
    void reset();

    /**
     * Get the number of instructions.
     */
    size_t getLength() const;

    /**
     * Get the instruction with the given index, or 0 if the index is
     * too large.
     */
    const Instruction* operator[](size_t index) const;

    /**
     * Print the instructions into the given stream with the given
     * indentation.
     */
    void print(FILE* f, size_t indent = 0) const;
};

//------------------------------------------------------------------------------
// Inline definitions
//------------------------------------------------------------------------------

inline InstructionSet::InstructionSet() :
    instructions(0),
    length(0)
{
}

//------------------------------------------------------------------------------

inline InstructionSet::InstructionSet(const Instruction* instructions,
                                      size_t length) :
    instructions(instructions),
    length(length)
{
}

//------------------------------------------------------------------------------

inline void InstructionSet::reset()
{
    instructions = 0;
    length = 0;
}

//------------------------------------------------------------------------------

inline size_t InstructionSet::getLength() const
{
    return length;
}

//------------------------------------------------------------------------------

inline const Instruction* InstructionSet::operator[](size_t index) const
{
    return (index<length) ? (instructions + index) : 0;
}

//------------------------------------------------------------------------------

} /* namespace dvd::vm */ } /* namespace dvd */

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_DVD_VM_INSTRUCTIONSET

// Local variables:
// mode: c++
// End: