/** * @file llstrider.h * * $LicenseInfo:firstyear=2001&license=viewerlgpl$ * 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_LLSTRIDER_H #define LL_LLSTRIDER_H #include "stdtypes.h" template <class Object> class LLStrider { union { Object* mObjectp; U8* mBytep; }; U32 mSkip; public: LLStrider() { mObjectp = NULL; mSkip = sizeof(Object); } LLStrider(Object* first) { mObjectp = first; mSkip = sizeof(Object); } ~LLStrider() { } const LLStrider<Object>& operator = (Object *first) { mObjectp = first; return *this;} void setStride (S32 skipBytes) { mSkip = (skipBytes ? skipBytes : sizeof(Object));} LLStrider<Object> operator+(const S32& index) { LLStrider<Object> ret; ret.mBytep = mBytep + mSkip*index; ret.mSkip = mSkip; return ret; } void skip(const U32 index) { mBytep += mSkip*index;} U32 getSkip() const { return mSkip; } Object* get() { return mObjectp; } Object* operator->() { return mObjectp; } Object& operator *() { return *mObjectp; } Object* operator ++(int) { Object* old = mObjectp; mBytep += mSkip; return old; } Object* operator +=(int i) { mBytep += mSkip*i; return mObjectp; } Object& operator[](U32 index) { return *(Object*)(mBytep + (mSkip * index)); } }; #endif // LL_LLSTRIDER_H