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
|
/*
Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef SegmentedString_h
#define SegmentedString_h
#include "PlatformString.h"
#include <wtf/Deque.h>
namespace WebCore {
class SegmentedString;
class SegmentedSubstring {
public:
SegmentedSubstring() : m_length(0), m_current(0), m_doNotExcludeLineNumbers(true) {}
SegmentedSubstring(const String& str)
: m_length(str.length())
, m_current(str.isEmpty() ? 0 : str.characters())
, m_string(str)
, m_doNotExcludeLineNumbers(true)
{
}
SegmentedSubstring(const UChar* str, int length) : m_length(length), m_current(length == 0 ? 0 : str), m_doNotExcludeLineNumbers(true) {}
void clear() { m_length = 0; m_current = 0; }
bool excludeLineNumbers() const { return !m_doNotExcludeLineNumbers; }
bool doNotExcludeLineNumbers() const { return m_doNotExcludeLineNumbers; }
void setExcludeLineNumbers() { m_doNotExcludeLineNumbers = false; }
void appendTo(String& str) const
{
if (m_string.characters() == m_current) {
if (str.isEmpty())
str = m_string;
else
str.append(m_string);
} else {
str.append(String(m_current, m_length));
}
}
public:
int m_length;
const UChar* m_current;
private:
String m_string;
bool m_doNotExcludeLineNumbers;
};
class SegmentedString {
public:
SegmentedString()
: m_pushedChar1(0), m_pushedChar2(0), m_currentChar(0), m_composite(false) {}
SegmentedString(const UChar* str, int length) : m_pushedChar1(0), m_pushedChar2(0)
, m_currentString(str, length), m_currentChar(m_currentString.m_current), m_composite(false) {}
SegmentedString(const String& str)
: m_pushedChar1(0), m_pushedChar2(0), m_currentString(str)
, m_currentChar(m_currentString.m_current), m_composite(false) {}
SegmentedString(const SegmentedString&);
const SegmentedString& operator=(const SegmentedString&);
void clear();
void append(const SegmentedString&);
void prepend(const SegmentedString&);
bool excludeLineNumbers() const { return m_currentString.excludeLineNumbers(); }
void setExcludeLineNumbers();
void push(UChar c)
{
if (!m_pushedChar1) {
m_pushedChar1 = c;
m_currentChar = m_pushedChar1 ? &m_pushedChar1 : m_currentString.m_current;
} else {
ASSERT(!m_pushedChar2);
m_pushedChar2 = c;
}
}
bool isEmpty() const { return !current(); }
unsigned length() const;
void advance()
{
if (!m_pushedChar1 && m_currentString.m_length > 1) {
--m_currentString.m_length;
m_currentChar = ++m_currentString.m_current;
return;
}
advanceSlowCase();
}
void advancePastNewline(int& lineNumber)
{
ASSERT(*current() == '\n');
if (!m_pushedChar1 && m_currentString.m_length > 1) {
lineNumber += m_currentString.doNotExcludeLineNumbers();
--m_currentString.m_length;
m_currentChar = ++m_currentString.m_current;
return;
}
advanceSlowCase(lineNumber);
}
void advancePastNonNewline()
{
ASSERT(*current() != '\n');
if (!m_pushedChar1 && m_currentString.m_length > 1) {
--m_currentString.m_length;
m_currentChar = ++m_currentString.m_current;
return;
}
advanceSlowCase();
}
void advance(int& lineNumber)
{
if (!m_pushedChar1 && m_currentString.m_length > 1) {
lineNumber += (*m_currentString.m_current == '\n') & m_currentString.doNotExcludeLineNumbers();
--m_currentString.m_length;
m_currentChar = ++m_currentString.m_current;
return;
}
advanceSlowCase(lineNumber);
}
bool escaped() const { return m_pushedChar1; }
String toString() const;
const UChar& operator*() const { return *current(); }
const UChar* operator->() const { return current(); }
private:
void append(const SegmentedSubstring&);
void prepend(const SegmentedSubstring&);
void advanceSlowCase();
void advanceSlowCase(int& lineNumber);
void advanceSubstring();
const UChar* current() const { return m_currentChar; }
UChar m_pushedChar1;
UChar m_pushedChar2;
SegmentedSubstring m_currentString;
const UChar* m_currentChar;
Deque<SegmentedSubstring> m_substrings;
bool m_composite;
};
}
#endif
|
