//----------------------------------------------------------------------

// Copyright 2011 Ciaran McHale.

//

// 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 CONFIG4CPP_STRING_BUFFER_H_

#define CONFIG4CPP_STRING_BUFFER_H_

//--------

// #includes & #defines

//--------

#include <config4cpp/namespace.h>

#include <assert.h>

#define CONFIG4CPP_STRING_BUFFER_INTERNAL_BUF_SIZE 32

namespace CONFIG4CPP_NAMESPACE {

class StringVector;

class LexToken;

class UidIdentifierProcessor;

class StringBuffer {

public:

StringBuffer();

StringBuffer(const char * str);

StringBuffer(const StringBuffer &);

~StringBuffer();

//--------

// Public API

//--------

inline const char * c_str() const;

inline int length() const;

inline char lastChar() const;

inline char operator[](int index) const;

inline char & operator[](int index);

inline void empty();

inline void deleteLastChar();

StringBuffer & append(const StringBuffer & other);

StringBuffer & append(const char * str);

StringBuffer & append(int val);

StringBuffer & append(float val);

StringBuffer & append(char ch);

inline StringBuffer & operator << (const StringBuffer & other);

inline StringBuffer & operator << (const char * str);

inline StringBuffer & operator << (int val);

inline StringBuffer & operator << (float val);

inline StringBuffer & operator << (char ch);

StringBuffer & operator=(const char * str);

StringBuffer & operator=(const StringBuffer & other);

protected:

friend class StringVector;

friend class LexToken;

friend class UidIdentifierProcessor;

void takeOwnershipOfStringIn(StringBuffer & other);

char * c_strWithOwnership();

//--------

// Helper operations

//--------

void growIfNeeded(int len);

//--------

// Instance variables

//--------

char m_internalBuf[CONFIG4CPP_STRING_BUFFER_INTERNAL_BUF_SIZE];

char * m_buf;

int m_currSize;

int m_maxSize;

};

//----------------------------------------------------------------------

// Implementation of inline operations

//----------------------------------------------------------------------

inline const char *

StringBuffer::c_str() const

{

return m_buf;

}

inline int

StringBuffer::length() const

{

return m_currSize - 1;

}

inline char

StringBuffer::lastChar() const

{

char result;

if (length() == 0) {

result = '\0';

} else {

result = m_buf[length() - 1];

}

return result;

}

inline char

StringBuffer::operator[](int index) const

{

return m_buf[index];

}

inline char &

StringBuffer::operator[](int index)

{

return m_buf[index];

}

inline void

StringBuffer::empty()

{

m_buf[0] = '\0';

m_maxSize = CONFIG4CPP_STRING_BUFFER_INTERNAL_BUF_SIZE;

m_currSize = 1;

}

inline void

StringBuffer::deleteLastChar()

{

assert(m_currSize > 1);

m_currSize--;

m_buf[m_currSize-1] = '\0';

}

inline StringBuffer &

StringBuffer::operator << (const StringBuffer & other)

{

append(other.c_str());

return *this;

}

inline StringBuffer &

StringBuffer::operator << (const char * str)

{

append(str);

return *this;

}

inline StringBuffer &

StringBuffer::operator << (int val)

{

append(val);

return *this;

}

inline StringBuffer &

StringBuffer::operator << (float val)

{

append(val);

return *this;

}

inline StringBuffer &

StringBuffer::operator << (char ch)

{

append(ch);

return *this;

}

}; // namespace CONFIG4CPP_NAMESPACE

#endif