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/indra/llcommon/llstrider.h

https://bitbucket.org/lindenlab/viewer-beta/
C++ Header | 57 lines | 26 code | 7 blank | 24 comment | 0 complexity | 962bf091bdc27e1c4398b07df624f470 MD5 | raw file
 1/** 
 2 * @file llstrider.h
 3 *
 4 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 5 * Second Life Viewer Source Code
 6 * Copyright (C) 2010, Linden Research, Inc.
 7 * 
 8 * This library is free software; you can redistribute it and/or
 9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation;
11 * version 2.1 of the License only.
12 * 
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Lesser General Public License for more details.
17 * 
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
21 * 
22 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
23 * $/LicenseInfo$
24 */
25
26#ifndef LL_LLSTRIDER_H
27#define LL_LLSTRIDER_H
28
29#include "stdtypes.h"
30
31template <class Object> class LLStrider
32{
33	union
34	{
35		Object* mObjectp;
36		U8*		mBytep;
37	};
38	U32     mSkip;
39public:
40
41	LLStrider()  { mObjectp = NULL; mSkip = sizeof(Object); } 
42	~LLStrider() { } 
43
44	const LLStrider<Object>& operator =  (Object *first)    { mObjectp = first; return *this;}
45	void setStride (S32 skipBytes)	{ mSkip = (skipBytes ? skipBytes : sizeof(Object));}
46
47	void skip(const U32 index)     { mBytep += mSkip*index;}
48	U32 getSkip() const			   { return mSkip; }
49	Object* get()                  { return mObjectp; }
50	Object* operator->()           { return mObjectp; }
51	Object& operator *()           { return *mObjectp; }
52	Object* operator ++(int)       { Object* old = mObjectp; mBytep += mSkip; return old; }
53	Object* operator +=(int i)     { mBytep += mSkip*i; return mObjectp; }
54	Object& operator[](U32 index)  { return *(Object*)(mBytep + (mSkip * index)); }
55};
56
57#endif // LL_LLSTRIDER_H