DataType.h

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/*
 * 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) 2012 Fernando José Iglesias García
 * Written (W) 2010,2012 Soeren Sonnenburg
 * Copyright (C) 2010 Berlin Institute of Technology
 * Copyright (C) 2012 Soeren Sonnenburg
 */

#ifndef __DATATYPE_H__
#define __DATATYPE_H__

#include <shogun/lib/common.h>
#include <shogun/io/SGIO.h>

#define PT_NOT_GENERIC  PT_SGOBJECT
#define PT_LONGEST  floatmax_t

namespace shogun
{

//class CMath;
template<class T> class CCache;

typedef int32_t index_t;


#ifndef DOXYGEN_SHOULD_SKIP_THIS
enum EContainerType
{
    CT_SCALAR=0,
    CT_VECTOR=1,
    CT_MATRIX=2,
    CT_NDARRAY=3,
    CT_SGVECTOR=4,
    CT_SGMATRIX=5
};

enum EStructType
{
    ST_NONE=0,
    ST_STRING=1,
    ST_SPARSE=2
};

enum EPrimitiveType
{
    PT_BOOL=0,
    PT_CHAR=1,
    PT_INT8=2,
    PT_UINT8=3,
    PT_INT16=4,
    PT_UINT16=5,
    PT_INT32=6,
    PT_UINT32=7,
    PT_INT64=8,
    PT_UINT64=9,
    PT_FLOAT32=10,
    PT_FLOAT64=11,
    PT_FLOATMAX=12,
    PT_SGOBJECT=13
};
#endif

struct TSGDataType
{
    EContainerType m_ctype;
    EStructType m_stype;
    EPrimitiveType m_ptype;

    index_t *m_length_y;
    index_t *m_length_x;

    explicit TSGDataType(EContainerType ctype, EStructType stype,
                         EPrimitiveType ptype);
    explicit TSGDataType(EContainerType ctype, EStructType stype,
                         EPrimitiveType ptype, index_t* length);
    explicit TSGDataType(EContainerType ctype, EStructType stype,
                         EPrimitiveType ptype, index_t* length_y,
                         index_t* length_x);

    bool operator==(const TSGDataType& a);
    inline bool operator!=(const TSGDataType& a)
    {
        return !(*this == a);
    }

    void to_string(char* dest, size_t n) const;

    size_t sizeof_stype() const;
    size_t sizeof_ptype() const;

    static size_t sizeof_sparseentry(EPrimitiveType ptype);

    static size_t offset_sparseentry(EPrimitiveType ptype);

    static void stype_to_string(char* dest, EStructType stype,
                                EPrimitiveType ptype, size_t n);
    static void ptype_to_string(char* dest, EPrimitiveType ptype,
                                size_t n);
    static bool string_to_ptype(EPrimitiveType* ptype,
                                const char* str);

    size_t get_size();

    index_t get_num_elements();
};
}
#endif /* __DATATYPE_H__  */