1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/**
* @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=(const LLStrider<Object>& rhs)
{
mBytep = rhs.mBytep;
mSkip = rhs.mSkip;
return *this;
}
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
|
