/** 
 * @file llmessagereader.h
 * @brief Declaration of LLMessageReader class.
 *
 * $LicenseInfo:firstyear=2007&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLMESSAGEREADER_H
#define LL_LLMESSAGEREADER_H

#include "stdtypes.h"

class LLHost;
class LLMessageBuilder;
class LLMsgData;
class LLQuaternion;
class LLUUID;
class LLVector3;
class LLVector3d;
class LLVector4;

// Error return values for getSize() functions
const S32 LL_BLOCK_NOT_IN_MESSAGE = -1;
const S32 LL_VARIABLE_NOT_IN_BLOCK = -2;
const S32 LL_MESSAGE_ERROR = -3;


class LLMessageReader
{
 public:

	virtual ~LLMessageReader();

	/** All get* methods expect pointers to canonical strings. */
	virtual void getBinaryData(const char *blockname, const char *varname, void *datap, S32 size, S32 blocknum = 0, S32 max_size = S32_MAX) = 0;
	virtual void getBOOL(const char *block, const char *var, bool &data, S32 blocknum = 0) = 0;
	virtual void getS8(const char *block, const char *var, S8 &data, S32 blocknum = 0) = 0;
	virtual void getU8(const char *block, const char *var, U8 &data, S32 blocknum = 0) = 0;
	virtual void getS16(const char *block, const char *var, S16 &data, S32 blocknum = 0) = 0;
	virtual void getU16(const char *block, const char *var, U16 &data, S32 blocknum = 0) = 0;
	virtual void getS32(const char *block, const char *var, S32 &data, S32 blocknum = 0) = 0;
	virtual void getF32(const char *block, const char *var, F32 &data, S32 blocknum = 0) = 0;
	virtual void getU32(const char *block, const char *var, U32 &data, S32 blocknum = 0) = 0;
	virtual void getU64(const char *block, const char *var, U64 &data, S32 blocknum = 0) = 0;
	virtual void getF64(const char *block, const char *var, F64 &data, S32 blocknum = 0) = 0;
	virtual void getVector3(const char *block, const char *var, LLVector3 &vec, S32 blocknum = 0) = 0;
	virtual void getVector4(const char *block, const char *var, LLVector4 &vec, S32 blocknum = 0) = 0;
	virtual void getVector3d(const char *block, const char *var, LLVector3d &vec, S32 blocknum = 0) = 0;
	virtual void getQuat(const char *block, const char *var, LLQuaternion &q, S32 blocknum = 0) = 0;
	virtual void getUUID(const char *block, const char *var, LLUUID &uuid, S32 blocknum = 0) = 0;
	virtual void getIPAddr(const char *block, const char *var, U32 &ip, S32 blocknum = 0) = 0;
	virtual void getIPPort(const char *block, const char *var, U16 &port, S32 blocknum = 0) = 0;
	virtual void getString(const char *block, const char *var, S32 buffer_size, char *buffer, S32 blocknum = 0) = 0;
	virtual void getString(const char *block, const char *var, std::string& outstr, S32 blocknum = 0) = 0;

	virtual S32	getNumberOfBlocks(const char *blockname) = 0;
	virtual S32	getSize(const char *blockname, const char *varname) = 0;
	virtual S32	getSize(const char *blockname, S32 blocknum, const char *varname) = 0;

	virtual void clearMessage() = 0;

	/** Returns pointer to canonical (prehashed) string. */
	virtual const char* getMessageName() const = 0;
	virtual S32 getMessageSize() const = 0;

	virtual void copyToBuilder(LLMessageBuilder&) const = 0;

	static void setTimeDecodes(BOOL b);
	static BOOL getTimeDecodes();
	static void setTimeDecodesSpamThreshold(F32 seconds);
	static F32 getTimeDecodesSpamThreshold();
};

#endif // LL_LLMESSAGEREADER_H