output_stream.h

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/*
 * nvbio
 * Copyright (c) 2011-2014, NVIDIA CORPORATION. All rights reserved.
 * 
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 * 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 the NVIDIA CORPORATION nor the
 *      names of its contributors may be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 * 
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#include <nvbio/basic/types.h>
#include <vector>

#pragma once

namespace nvbio {


struct OutputStream
{
    virtual ~OutputStream() {}

    virtual uint32 write(const uint32 bytes, const void* buffer) { return 0; }

    virtual bool is_valid() const { return true; }
};

// Base abstract output file class
//
struct GZOutputFile : public OutputStream
{
    GZOutputFile(const char* name, const char* comp);

    ~GZOutputFile();

    uint32 write(const uint32 bytes, const void* buffer);

    bool is_valid() const { return m_file != NULL; }

    void* m_file;
};

// Base abstract output file class
//
struct LZ4OutputFile : public OutputStream
{
    LZ4OutputFile(const char* name, const char* comp);

    ~LZ4OutputFile();

    uint32 write(const uint32 bytes, const void* buffer);

    bool is_valid() const { return m_file != NULL; }

    void*               m_context;
    void*               m_file;
    std::vector<uint8>  m_buffer;
};

OutputStream* open_output_file(const char* file_name, const char* compressor, const char* options);


} // namespace nvbio