68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
/**
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* @file llstrider.h
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*
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* $LicenseInfo:firstyear=2001&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef LL_LLSTRIDER_H
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#define LL_LLSTRIDER_H
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#include "stdtypes.h"
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template <class Object> class LLStrider
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{
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union
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{
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Object* mObjectp;
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U8* mBytep;
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};
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U32 mSkip;
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public:
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LLStrider() { mObjectp = NULL; mSkip = sizeof(Object); }
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~LLStrider() { }
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const LLStrider<Object>& operator = (Object *first) { mObjectp = first; return *this;}
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void setStride (S32 skipBytes) { mSkip = (skipBytes ? skipBytes : sizeof(Object));}
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LLStrider<Object> operator+(const S32& index)
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{
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LLStrider<Object> ret;
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ret.mBytep = mBytep + mSkip*index;
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ret.mSkip = mSkip;
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return ret;
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}
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void skip(const U32 index) { mBytep += mSkip*index;}
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U32 getSkip() const { return mSkip; }
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Object* get() { return mObjectp; }
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Object* operator->() { return mObjectp; }
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Object& operator *() { return *mObjectp; }
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Object* operator ++(int) { Object* old = mObjectp; mBytep += mSkip; return old; }
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Object* operator +=(int i) { mBytep += mSkip*i; return mObjectp; }
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Object& operator[](U32 index) { return *(Object*)(mBytep + (mSkip * index)); }
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};
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#endif // LL_LLSTRIDER_H
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