// emacs:		-*- c++ -*-
// file:		SC_StringBuffer.h
// copyright:	2003 stefan kersten <steve@k-hornz.de>
// cvs:			$Id$

// 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 2 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, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
// USA

#pragma once

#include <stdarg.h>
#include <stdlib.h>

// =====================================================================
// SC_StringBuffer - Autogrowing string buffer.
// =====================================================================

class SC_StringBuffer
{
public:
	SC_StringBuffer(size_t initialSize=0);
	SC_StringBuffer(const SC_StringBuffer& other);
	~SC_StringBuffer();

	size_t getCapacity() const { return mCapacity; }
	size_t getSize() const { return mPtr - mData; }
	size_t getRemaining() const { return mCapacity - getSize(); }
	char* getData() const { return mData; }

	bool isEmpty() const { return getSize() == 0; }

	void finish() { append('\0'); }
	void reset() { mPtr = mData; }
	void append(const char* src, size_t len);
	void append(char c);
	void append(const char* str);
	void vappendf(const char* fmt, va_list vargs);
	void appendf(const char* fmt, ...);

protected:
	enum {
		kGrowAlign = 256,
		kGrowMask = kGrowAlign - 1
	};

	void growBy(size_t request);

private:
	size_t	mCapacity;
	char*	mPtr;
	char*	mData;
};
