SGString.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
 * Written (W) 2012 Jacob Walker
 * Copyright (C) 2010 Berlin Institute of Technology
 * Copyright (C) 2012 Soeren Sonnenburg
 */
#ifndef __SGSTRING_H__
#define __SGSTRING_H__

#include <shogun/lib/config.h>
#include <shogun/lib/DataType.h>
#include <shogun/lib/SGVector.h>

namespace shogun
{

template<class T> class SGString
{
public:
    SGString() : string(NULL), slen(0), do_free(false) { }

    SGString(T* s, index_t l, bool free_s=false)
        : string(s), slen(l), do_free(free_s) { }

    SGString(SGVector<T> v)
        : string(v.vector), slen(v.vlen), do_free(v.do_free) { }

    SGString(index_t len, bool free_s=false) :
        slen(len), do_free(free_s)
    {
        string=SG_CALLOC(T, len);
    }

    SGString(const SGString &orig)
        : string(orig.string), slen(orig.slen), do_free(orig.do_free) { }

    bool operator==(const SGString & other) const
    {
        if (other.slen != slen)
            return false;

        for (int i = 0; i < slen; i++)
        {
            if (other.string[i] != string[i])
                return false;
        }

        return true;
    }

    void free_string()
    {
        if (do_free)
            SG_FREE(string);

        string=NULL;
        do_free=false;
        slen=0;
    }

    void destroy_string()
    {
        do_free=true;
        free_string();
    }

public:
    T* string;
    index_t slen;
    bool do_free;
};
}
#endif // __SGSTRING_H__