common/wstring/accumulator.h

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//
// aegis - project change supervisor
// Copyright (C) 2008 Peter Miller
//
// 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.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. If not, see <http://www.gnu.org/licenses/>.
//

#ifndef COMMON_WSTRING_ACCUMULATOR_H
#define COMMON_WSTRING_ACCUMULATOR_H

#include <common/wstring.h>

class wstring_accumulator
{
public:
    ~wstring_accumulator();

    wstring_accumulator();

    wstring_accumulator(const wstring_accumulator &);

    wstring_accumulator &operator=(const wstring_accumulator &);

    wstring mkstr() const;

    void
    push_back(wchar_t c)
    {
        if (length < maximum)
            buffer[length++] = c;
        else
            overflow(c);
    }

    void push_back(const wchar_t *data, size_t len);

    void push_back(const wchar_t *data);

    void push_back(const wstring_accumulator &data);

    void push_back(const wstring &data);

    void clear() { length = 0; }

    size_t size() const { return length; }

    bool empty() const { return (length == 0); }

    void pop_back() { if (length) --length; }

    wchar_t back() { return (length ? buffer[length - 1] : 0); }

    const wchar_t *get_data() const { return (buffer ? buffer : L""); }

    wchar_t operator[](size_t n) { return buffer[n]; }

private:
    void overflow(wchar_t c);

    size_t length;

    size_t maximum;

    wchar_t *buffer;
};

#endif // COMMON_WSTRING_ACCUMULATOR_H