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
|
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fxcrt/include/fx_basic.h"
#include "core/fxcrt/plex.h"
CFX_PtrList::CFX_PtrList(int nBlockSize)
: m_pNodeHead(nullptr),
m_pNodeTail(nullptr),
m_nCount(0),
m_pNodeFree(nullptr),
m_pBlocks(nullptr),
m_nBlockSize(nBlockSize) {}
FX_POSITION CFX_PtrList::AddTail(void* newElement) {
CNode* pNewNode = NewNode(m_pNodeTail, nullptr);
pNewNode->data = newElement;
if (m_pNodeTail) {
m_pNodeTail->pNext = pNewNode;
} else {
m_pNodeHead = pNewNode;
}
m_pNodeTail = pNewNode;
return (FX_POSITION)pNewNode;
}
FX_POSITION CFX_PtrList::AddHead(void* newElement) {
CNode* pNewNode = NewNode(nullptr, m_pNodeHead);
pNewNode->data = newElement;
if (m_pNodeHead) {
m_pNodeHead->pPrev = pNewNode;
} else {
m_pNodeTail = pNewNode;
}
m_pNodeHead = pNewNode;
return (FX_POSITION)pNewNode;
}
FX_POSITION CFX_PtrList::InsertAfter(FX_POSITION position, void* newElement) {
if (!position) {
return AddTail(newElement);
}
CNode* pOldNode = (CNode*)position;
CNode* pNewNode = NewNode(pOldNode, pOldNode->pNext);
pNewNode->data = newElement;
if (pOldNode->pNext) {
pOldNode->pNext->pPrev = pNewNode;
} else {
m_pNodeTail = pNewNode;
}
pOldNode->pNext = pNewNode;
return (FX_POSITION)pNewNode;
}
void CFX_PtrList::RemoveAt(FX_POSITION position) {
CNode* pOldNode = (CNode*)position;
if (pOldNode == m_pNodeHead) {
m_pNodeHead = pOldNode->pNext;
} else {
pOldNode->pPrev->pNext = pOldNode->pNext;
}
if (pOldNode == m_pNodeTail) {
m_pNodeTail = pOldNode->pPrev;
} else {
pOldNode->pNext->pPrev = pOldNode->pPrev;
}
FreeNode(pOldNode);
}
void CFX_PtrList::FreeNode(CFX_PtrList::CNode* pNode) {
pNode->pNext = m_pNodeFree;
m_pNodeFree = pNode;
m_nCount--;
if (m_nCount == 0) {
RemoveAll();
}
}
void CFX_PtrList::RemoveAll() {
m_nCount = 0;
m_pNodeHead = nullptr;
m_pNodeTail = nullptr;
m_pNodeFree = nullptr;
if (m_pBlocks) {
m_pBlocks->FreeDataChain();
m_pBlocks = nullptr;
}
}
CFX_PtrList::CNode* CFX_PtrList::NewNode(CFX_PtrList::CNode* pPrev,
CFX_PtrList::CNode* pNext) {
if (!m_pNodeFree) {
CFX_Plex* pNewBlock =
CFX_Plex::Create(m_pBlocks, m_nBlockSize, sizeof(CNode));
CNode* pNode = (CNode*)pNewBlock->data();
pNode += m_nBlockSize - 1;
for (int i = m_nBlockSize - 1; i >= 0; i--, pNode--) {
pNode->pNext = m_pNodeFree;
m_pNodeFree = pNode;
}
}
CFX_PtrList::CNode* pNode = m_pNodeFree;
m_pNodeFree = m_pNodeFree->pNext;
pNode->pPrev = pPrev;
pNode->pNext = pNext;
m_nCount++;
ASSERT(m_nCount > 0);
pNode->data = 0;
return pNode;
}
CFX_PtrList::~CFX_PtrList() {
RemoveAll();
ASSERT(m_nCount == 0);
}
FX_POSITION CFX_PtrList::FindIndex(int nIndex) const {
if (nIndex >= m_nCount || nIndex < 0) {
return nullptr;
}
CNode* pNode = m_pNodeHead;
while (nIndex--) {
pNode = pNode->pNext;
}
return (FX_POSITION)pNode;
}
FX_POSITION CFX_PtrList::Find(void* searchValue, FX_POSITION startAfter) const {
CNode* pNode = (CNode*)startAfter;
pNode = pNode ? pNode->pNext : m_pNodeHead;
for (; pNode; pNode = pNode->pNext) {
if (pNode->data == searchValue)
return (FX_POSITION)pNode;
}
return nullptr;
}
|
