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
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsHtml5String.h"
#include "nsCharTraits.h"
#include "nsHtml5TreeBuilder.h"
#include "nsUTF8Utils.h"
void nsHtml5String::ToString(nsAString& aString) {
switch (GetKind()) {
case eStringBuffer:
return AsStringBuffer()->ToString(Length(), aString);
case eAtom:
return AsAtom()->ToString(aString);
case eEmpty:
aString.Truncate();
return;
default:
aString.Truncate();
aString.SetIsVoid(true);
return;
}
}
void nsHtml5String::CopyToBuffer(char16_t* aBuffer) const {
memcpy(aBuffer, AsPtr(), Length() * sizeof(char16_t));
}
bool nsHtml5String::LowerCaseEqualsASCII(const char* aLowerCaseLiteral) const {
return !nsCharTraits<char16_t>::compareLowerCaseToASCIINullTerminated(
AsPtr(), Length(), aLowerCaseLiteral);
}
bool nsHtml5String::EqualsASCII(const char* aLiteral) const {
return !nsCharTraits<char16_t>::compareASCIINullTerminated(AsPtr(), Length(),
aLiteral);
}
bool nsHtml5String::LowerCaseStartsWithASCII(
const char* aLowerCaseLiteral) const {
const char* litPtr = aLowerCaseLiteral;
const char16_t* strPtr = AsPtr();
const char16_t* end = strPtr + Length();
char16_t litChar;
while ((litChar = *litPtr)) {
MOZ_ASSERT(!(litChar >= 'A' && litChar <= 'Z'),
"Literal isn't in lower case.");
if (strPtr == end) {
return false;
}
char16_t strChar = *strPtr;
if (strChar >= 'A' && strChar <= 'Z') {
strChar += 0x20;
}
if (litChar != strChar) {
return false;
}
++litPtr;
++strPtr;
}
return true;
}
bool nsHtml5String::Equals(nsHtml5String aOther) const {
MOZ_ASSERT(operator bool());
MOZ_ASSERT(aOther);
if (Length() != aOther.Length()) {
return false;
}
return !memcmp(AsPtr(), aOther.AsPtr(), Length() * sizeof(char16_t));
}
nsHtml5String nsHtml5String::Clone() {
switch (GetKind()) {
case eStringBuffer:
AsStringBuffer()->AddRef();
break;
case eAtom:
AsAtom()->AddRef();
break;
default:
break;
}
return nsHtml5String(mBits);
}
void nsHtml5String::Release() {
switch (GetKind()) {
case eStringBuffer:
AsStringBuffer()->Release();
break;
case eAtom:
AsAtom()->Release();
break;
default:
break;
}
mBits = eNull;
}
// static
nsHtml5String nsHtml5String::FromBuffer(char16_t* aBuffer, int32_t aLength,
nsHtml5TreeBuilder* aTreeBuilder) {
if (!aLength) {
return nsHtml5String(eEmpty);
}
// Work with nsStringBuffer directly to make sure that storage is actually
// nsStringBuffer and to make sure the allocation strategy matches
// nsAttrValue::GetStringBuffer, so that it doesn't need to reallocate and
// copy.
RefPtr<nsStringBuffer> buffer = nsStringBuffer::Create(aBuffer, aLength);
if (MOZ_UNLIKELY(!buffer)) {
if (!aTreeBuilder) {
MOZ_CRASH("Out of memory.");
}
aTreeBuilder->MarkAsBroken(NS_ERROR_OUT_OF_MEMORY);
buffer = nsStringBuffer::Alloc(2 * sizeof(char16_t));
if (!buffer) {
MOZ_CRASH(
"Out of memory so badly that couldn't even allocate placeholder.");
}
char16_t* data = reinterpret_cast<char16_t*>(buffer->Data());
data[0] = 0xFFFD;
data[1] = 0;
}
return nsHtml5String(reinterpret_cast<uintptr_t>(buffer.forget().take()) |
eStringBuffer);
}
// static
nsHtml5String nsHtml5String::FromLiteral(const char* aLiteral) {
size_t length = std::strlen(aLiteral);
if (!length) {
return nsHtml5String(eEmpty);
}
// Work with nsStringBuffer directly to make sure that storage is actually
// nsStringBuffer and to make sure the allocation strategy matches
// nsAttrValue::GetStringBuffer, so that it doesn't need to reallocate and
// copy.
RefPtr<nsStringBuffer> buffer(
nsStringBuffer::Alloc((length + 1) * sizeof(char16_t)));
if (!buffer) {
MOZ_CRASH("Out of memory.");
}
char16_t* data = reinterpret_cast<char16_t*>(buffer->Data());
ConvertAsciitoUtf16(mozilla::Span(aLiteral, length),
mozilla::Span(data, length));
data[length] = 0;
return nsHtml5String(reinterpret_cast<uintptr_t>(buffer.forget().take()) |
eStringBuffer);
}
// static
nsHtml5String nsHtml5String::FromString(const nsAString& aString) {
auto length = aString.Length();
if (!length) {
return nsHtml5String(eEmpty);
}
RefPtr<nsStringBuffer> buffer = nsStringBuffer::FromString(aString);
if (buffer && (length == buffer->StorageSize() / sizeof(char16_t) - 1)) {
return nsHtml5String(reinterpret_cast<uintptr_t>(buffer.forget().take()) |
eStringBuffer);
}
buffer = nsStringBuffer::Alloc((length + 1) * sizeof(char16_t));
if (!buffer) {
MOZ_CRASH("Out of memory.");
}
char16_t* data = reinterpret_cast<char16_t*>(buffer->Data());
memcpy(data, aString.BeginReading(), length * sizeof(char16_t));
data[length] = 0;
return nsHtml5String(reinterpret_cast<uintptr_t>(buffer.forget().take()) |
eStringBuffer);
}
// static
nsHtml5String nsHtml5String::FromAtom(already_AddRefed<nsAtom> aAtom) {
return nsHtml5String(reinterpret_cast<uintptr_t>(aAtom.take()) | eAtom);
}
// static
nsHtml5String nsHtml5String::EmptyString() { return nsHtml5String(eEmpty); }
|
