/**
 * Copyright (c) 2011-2022 Bill Greiman
 * This file is part of the SdFat library for SD memory cards.
 *
 * MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
#ifndef bufstream_h
#define bufstream_h
/**
 * \file
 * \brief \ref ibufstream and \ref obufstream classes
 */
#include <string.h>

#include "iostream.h"
//==============================================================================
/**
 * \class ibufstream
 * \brief parse a char string
 */
class ibufstream : public istream
{
  public:
    /** Constructor */
    ibufstream()
    {
    }
    /** Constructor
     * \param[in] str pointer to string to be parsed
     * Warning: The string will not be copied so must stay in scope.
     */
    explicit ibufstream(const char *str)
    {
        init(str);
    }
    /** Initialize an ibufstream
     * \param[in] str pointer to string to be parsed
     * Warning: The string will not be copied so must stay in scope.
     */
    void init(const char *str)
    {
        m_buf = str;
        m_len = strlen(m_buf);
        m_pos = 0;
        clear();
    }

  protected:
    /// @cond SHOW_PROTECTED
    int16_t getch()
    {
        if (m_pos < m_len)
        {
            return m_buf[m_pos++];
        }
        setstate(eofbit);
        return -1;
    }
    void getpos(pos_t *pos)
    {
        pos->position = m_pos;
    }
    bool seekoff(off_type off, seekdir way)
    {
        (void)off;
        (void)way;
        return false;
    }
    bool seekpos(pos_type pos)
    {
        if (pos < m_len)
        {
            m_pos = pos;
            return true;
        }
        return false;
    }
    void setpos(pos_t *pos)
    {
        m_pos = pos->position;
    }
    pos_type tellpos()
    {
        return m_pos;
    }
    /// @endcond
  private:
    const char *m_buf = nullptr;
    size_t m_len = 0;
    size_t m_pos;
};
//==============================================================================
/**
 * \class obufstream
 * \brief format a char string
 */
class obufstream : public ostream
{
  public:
    /** constructor */
    obufstream()
    {
    }
    /** Constructor
     * \param[in] buf buffer for formatted string
     * \param[in] size buffer size
     */
    obufstream(char *buf, size_t size)
    {
        init(buf, size);
    }
    /** Initialize an obufstream
     * \param[in] buf buffer for formatted string
     * \param[in] size buffer size
     */
    void init(char *buf, size_t size)
    {
        m_buf = buf;
        buf[0] = '\0';
        m_size = size;
        m_in = 0;
    }
    /** \return a pointer to the buffer */
    char *buf()
    {
        return m_buf;
    }
    /** \return the length of the formatted string */
    size_t length()
    {
        return m_in;
    }

  protected:
    /// @cond SHOW_PROTECTED
    void putch(char c)
    {
        if ((m_in + 1) >= m_size)
        {
            setstate(badbit);
            return;
        }
        m_buf[m_in++] = c;
        m_buf[m_in] = '\0';
    }
    void putstr(const char *str)
    {
        while (*str)
        {
            putch(*str++);
        }
    }
    bool seekoff(off_type off, seekdir way)
    {
        (void)off;
        (void)way;
        return false;
    }
    bool seekpos(pos_type pos)
    {
        if (pos > m_in)
        {
            return false;
        }
        m_in = pos;
        m_buf[m_in] = '\0';
        return true;
    }
    bool sync()
    {
        return true;
    }
    pos_type tellpos()
    {
        return m_in;
    }
    /// @endcond
  private:
    char *m_buf = nullptr;
    size_t m_size = 0;
    size_t m_in = 0;
};
#endif // bufstream_h
