/**

 * vim: set ts=4 :

 * =============================================================================

 * SourceMod Updater Extension

 * Copyright (C) 2004-2009 AlliedModders LLC.  All rights reserved.

 * =============================================================================

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License, version 3.0, as published by the

 * Free Software Foundation.

 * 

 * 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/>.

 *

 * As a special exception, AlliedModders LLC gives you permission to link the

 * code of this program (as well as its derivative works) to "Half-Life 2," the

 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software

 * by the Valve Corporation.  You must obey the GNU General Public License in

 * all respects for all other code used.  Additionally, AlliedModders LLC grants

 * this exception to all derivative works.  AlliedModders LLC defines further

 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),

 * or <http://www.sourcemod.net/license.php>.

 *

 * Version: $Id$

 */

#include <assert.h>

#include <string.h>

#include <stdlib.h>

#include "MemoryDownloader.h"

using namespace SourceMod;

MemoryDownloader::MemoryDownloader() : buffer(NULL), bufsize(0), bufpos(0)

{

}

MemoryDownloader::~MemoryDownloader()

{

	free(buffer);

}

DownloadWriteStatus MemoryDownloader::OnDownloadWrite(IWebTransfer *session,

													  void *userdata,

													  void *ptr,

													  size_t size,

													  size_t nmemb)

{

	size_t total = size * nmemb;

	if (bufpos + total > bufsize)

	{

		size_t rem = (bufpos + total) - bufsize;

		bufsize += rem + (rem / 2);

		buffer = (char *)realloc(buffer, bufsize);

	}

	assert(bufpos + total <= bufsize);

	memcpy(&buffer[bufpos], ptr, total);

	bufpos += total;

	return DownloadWrite_Okay;

}

void MemoryDownloader::Reset()

{

	bufpos = 0;

}

char *MemoryDownloader::GetBuffer()

{

	return buffer;

}

size_t MemoryDownloader::GetSize()

{

	return bufpos;

}