IStreams.h

//-*****************************************************************************
//
// Copyright (c) 2013,
//  Sony Pictures Imageworks Inc. and
//  Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// *       Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// *       Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// *       Neither the name of Industrial Light & Magic nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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//-*****************************************************************************
 
#ifndef Alembic_Ogawa_IStreams_h
#define Alembic_Ogawa_IStreams_h
 
#include <Alembic/Util/Export.h>
#include <Alembic/Ogawa/Foundation.h>
 
#include <istream>
 
namespace Alembic {
namespace Ogawa {
namespace ALEMBIC_VERSION_NS {
 
class ALEMBIC_EXPORT IStreams
{
public:
    IStreams(const std::string & iFileName,
             std::size_t iNumStreams=1,
             bool iUseMMap=true);
    IStreams(const std::vector< std::istream * > & iStreams);
    ~IStreams();
 
    bool isValid();
    bool isFrozen();
    Alembic::Util::uint16_t getVersion();
 
    Alembic::Util::uint64_t getSize();
 
    // locks on the threadId, seeks to iPos, and reads iSize bytes into oBuf
    void read(std::size_t iThreadId, Alembic::Util::uint64_t iPos,
              Alembic::Util::uint64_t iSize, void * oBuf);
 
private:
    // noncopyable
    IStreams(const IStreams &);
    const IStreams & operator=(const IStreams &);
 
    class PrivateData;
    Alembic::Util::unique_ptr< PrivateData > mData;
};
typedef Alembic::Util::shared_ptr< IStreams > IStreamsPtr;
 
} // End namespace ALEMBIC_VERSION_NS
 
using namespace ALEMBIC_VERSION_NS;
 
} // End namespace Ogawa
 
} // End namespace Alembic
 
#endif