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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/**
* @file lldarray.h
* @brief Wrapped std::vector for backward compatibility.
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* 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_LLDARRAY_H
#define LL_LLDARRAY_H
#include "llerror.h"
#include <vector>
#include <map>
// class LLDynamicArray<>; // = std::vector + reserves <BlockSize> elements
// class LLDynamicArrayIndexed<>; // = std::vector + std::map if indices, only supports operator[] and begin(),end()
//--------------------------------------------------------
// LLDynamicArray declaration
//--------------------------------------------------------
// NOTE: BlockSize is used to reserve a minimal initial amount
template <typename Type, int BlockSize = 32>
class LLDynamicArray : public std::vector<Type>
{
public:
enum
{
OKAY = 0,
FAIL = -1
};
LLDynamicArray(S32 size=0) : std::vector<Type>(size) { if (size < BlockSize) std::vector<Type>::reserve(BlockSize); }
void reset() { std::vector<Type>::clear(); }
// ACCESSORS
const Type& get(S32 index) const { return std::vector<Type>::operator[](index); }
Type& get(S32 index) { return std::vector<Type>::operator[](index); }
S32 find(const Type &obj) const;
S32 count() const { return std::vector<Type>::size(); }
S32 getLength() const { return std::vector<Type>::size(); }
S32 getMax() const { return std::vector<Type>::capacity(); }
// MANIPULATE
S32 put(const Type &obj); // add to end of array, returns index
// Type* reserve(S32 num); // reserve a block of indices in advance
Type* reserve_block(U32 num); // reserve a block of indices in advance
S32 remove(S32 index); // remove by index, no bounds checking
S32 removeObj(const Type &obj); // remove by object
S32 removeLast();
void operator+=(const LLDynamicArray<Type,BlockSize> &other);
};
//--------------------------------------------------------
// LLDynamicArray implementation
//--------------------------------------------------------
template <typename Type,int BlockSize>
inline S32 LLDynamicArray<Type,BlockSize>::find(const Type &obj) const
{
typename std::vector<Type>::const_iterator iter = std::find(this->begin(), this->end(), obj);
if (iter != this->end())
{
return iter - this->begin();
}
return FAIL;
}
template <typename Type,int BlockSize>
inline S32 LLDynamicArray<Type,BlockSize>::remove(S32 i)
{
// This is a fast removal by swapping with the last element
S32 sz = this->size();
if (i < 0 || i >= sz)
{
return FAIL;
}
if (i < sz-1)
{
this->operator[](i) = this->back();
}
this->pop_back();
return i;
}
template <typename Type,int BlockSize>
inline S32 LLDynamicArray<Type,BlockSize>::removeObj(const Type& obj)
{
typename std::vector<Type>::iterator iter = std::find(this->begin(), this->end(), obj);
if (iter != this->end())
{
S32 res = iter - this->begin();
typename std::vector<Type>::iterator last = this->end();
--last;
*iter = *last;
this->pop_back();
return res;
}
return FAIL;
}
template <typename Type,int BlockSize>
inline S32 LLDynamicArray<Type,BlockSize>::removeLast()
{
if (!this->empty())
{
this->pop_back();
return OKAY;
}
return FAIL;
}
template <typename Type,int BlockSize>
inline Type* LLDynamicArray<Type,BlockSize>::reserve_block(U32 num)
{
U32 sz = this->size();
this->resize(sz+num);
return &(this->operator[](sz));
}
template <typename Type,int BlockSize>
inline S32 LLDynamicArray<Type,BlockSize>::put(const Type &obj)
{
this->push_back(obj);
return this->size() - 1;
}
template <typename Type,int BlockSize>
inline void LLDynamicArray<Type,BlockSize>::operator+=(const LLDynamicArray<Type,BlockSize> &other)
{
insert(this->end(), other.begin(), other.end());
}
//--------------------------------------------------------
// LLDynamicArrayIndexed declaration
//--------------------------------------------------------
template <typename Type, typename Key, int BlockSize = 32>
class LLDynamicArrayIndexed
{
public:
typedef typename std::vector<Type>::iterator iterator;
typedef typename std::vector<Type>::const_iterator const_iterator;
typedef typename std::vector<Type>::reverse_iterator reverse_iterator;
typedef typename std::vector<Type>::const_reverse_iterator const_reverse_iterator;
typedef typename std::vector<Type>::size_type size_type;
protected:
std::vector<Type> mVector;
std::map<Key, U32> mIndexMap;
public:
LLDynamicArrayIndexed() { mVector.reserve(BlockSize); }
iterator begin() { return mVector.begin(); }
const_iterator begin() const { return mVector.begin(); }
iterator end() { return mVector.end(); }
const_iterator end() const { return mVector.end(); }
reverse_iterator rbegin() { return mVector.rbegin(); }
const_reverse_iterator rbegin() const { return mVector.rbegin(); }
reverse_iterator rend() { return mVector.rend(); }
const_reverse_iterator rend() const { return mVector.rend(); }
void reset() { mVector.resize(0); mIndexMap.resize(0); }
bool empty() const { return mVector.empty(); }
size_type size() const { return mVector.size(); }
Type& operator[](const Key& k)
{
typename std::map<Key, U32>::const_iterator iter = mIndexMap.find(k);
if (iter == mIndexMap.end())
{
U32 n = mVector.size();
mIndexMap[k] = n;
mVector.push_back(Type());
llassert(mVector.size() == mIndexMap.size());
return mVector[n];
}
else
{
return mVector[iter->second];
}
}
const_iterator find(const Key& k) const
{
typename std::map<Key, U32>::const_iterator iter = mIndexMap.find(k);
if(iter == mIndexMap.end())
{
return mVector.end();
}
else
{
return mVector.begin() + iter->second;
}
}
};
#endif
|
