101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
/**
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* @file llstrider.h
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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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<typename T>
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inline void copyArray(T* dst, const T* src, const U32 bytes)
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{
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memcpy(dst, src, bytes);
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}
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template<>
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inline void copyArray<>(LLVector4a* dst, const LLVector4a* src, const U32 bytes)
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{
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LLVector4a::memcpyNonAliased16(dst->getF32ptr(), src->getF32ptr(), bytes);
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}
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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[](size_t index) { return *(Object*)(mBytep + (mSkip * index)); }
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void copyArray(const U32 offset, const Object* src, const U32 length)
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{
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if (mSkip == sizeof(Object))
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{
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::copyArray(mObjectp + offset, src, length * sizeof(Object));
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}
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else
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{
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for (U32 i = 0; i < length; i++)
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{
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(*this)[offset + i] = src[i];
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}
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}
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}
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};
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#endif // LL_LLSTRIDER_H
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