llmemorystream.h
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- /**
- * @file llmemorystream.h
- * @author Phoenix
- * @date 2005-06-03
- * @brief Implementation of a simple fixed memory stream
- *
- * $LicenseInfo:firstyear=2005&license=viewergpl$
- *
- * Copyright (c) 2005-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #ifndef LL_LLMEMORYSTREAM_H
- #define LL_LLMEMORYSTREAM_H
- /**
- * This is a simple but effective optimization when you want to treat
- * a chunk of memory as an istream. I wrote this to avoid turing a
- * buffer into a string, and then throwing the string into an
- * iostringstream just to parse it into another datatype, eg, LLSD.
- */
- #include <iostream>
- /**
- * @class LLMemoryStreamBuf
- * @brief This implements a wrapper around a piece of memory for istreams
- *
- * The memory passed in is NOT owned by an instance. The caller must
- * be careful to always pass in a valid memory location that exists
- * for at least as long as this streambuf.
- */
- class LL_COMMON_API LLMemoryStreamBuf : public std::streambuf
- {
- public:
- LLMemoryStreamBuf(const U8* start, S32 length);
- ~LLMemoryStreamBuf();
- void reset(const U8* start, S32 length);
- protected:
- int underflow();
- //std::streamsize xsgetn(char* dest, std::streamsize n);
- };
- /**
- * @class LLMemoryStream
- * @brief This implements a wrapper around a piece of memory for istreams
- *
- * The memory passed in is NOT owned by an instance. The caller must
- * be careful to always pass in a valid memory location that exists
- * for at least as long as this streambuf.
- */
- class LL_COMMON_API LLMemoryStream : public std::istream
- {
- public:
- LLMemoryStream(const U8* start, S32 length);
- ~LLMemoryStream();
- protected:
- LLMemoryStreamBuf mStreamBuf;
- };
- #endif // LL_LLMEMORYSTREAM_H