vw_example.h

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/*
 * Copyright (c) 2009 Yahoo! Inc.  All rights reserved.  The copyrights
 * embodied in the content of this file are licensed under the BSD
 * (revised) open source license.
 *
 * 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 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2011 Shashwat Lal Das
 * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society.
 */

#ifndef _VW_EXAMPLE_H__
#define _VW_EXAMPLE_H__

#include <shogun/lib/config.h>

#include <shogun/lib/DataType.h>
#include <shogun/lib/common.h>
#include <shogun/lib/v_array.h>
#include <shogun/classifier/vw/vw_constants.h>
#include <shogun/classifier/vw/vw_label.h>

namespace shogun
{

class VwFeature
{
public:
    float32_t x;

    uint32_t weight_index;

    bool operator==(VwFeature j) { return weight_index == j.weight_index; }
};

class VwExample
{
public:
    VwExample();

    ~VwExample();

    void reset_members();

public:
    VwLabel* ld;

    v_array<char> tag;
    v_array<vw_size_t> indices;
    v_array<VwFeature> atomics[256];

    vw_size_t num_features;
    vw_size_t pass;
    float32_t final_prediction;
    float32_t loss;
    float32_t eta_round;
    float32_t global_weight;
    float32_t example_t;

    float64_t sum_feat_sq[256];
    float32_t total_sum_feat_sq;

    vw_size_t example_counter;
    bool sorted;
};

}
#endif // _VW_EXAMPLE_H__