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1 /* | 1 /* |
2 * Copyright (C) 2009 Google Inc. All rights reserved. | 2 * Copyright (C) 2009 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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28 | 28 |
29 #include "bindings/core/v8/V8Binding.h" | 29 #include "bindings/core/v8/V8Binding.h" |
30 #include "core/inspector/BindingVisitors.h" | 30 #include "core/inspector/BindingVisitors.h" |
31 #include "wtf/MainThread.h" | 31 #include "wtf/MainThread.h" |
32 | 32 |
33 namespace blink { | 33 namespace blink { |
34 | 34 |
35 template<class StringClass> struct StringTraits { | 35 template<class StringClass> struct StringTraits { |
36 static const StringClass& fromStringResource(WebCoreStringResourceBase*); | 36 static const StringClass& fromStringResource(WebCoreStringResourceBase*); |
37 template <typename V8StringTrait> | 37 template <typename V8StringTrait> |
38 static StringClass fromV8String(v8::Handle<v8::String>, int); | 38 static StringClass fromV8String(v8::Local<v8::String>, int); |
39 }; | 39 }; |
40 | 40 |
41 template<> | 41 template<> |
42 struct StringTraits<String> { | 42 struct StringTraits<String> { |
43 static const String& fromStringResource(WebCoreStringResourceBase* resource) | 43 static const String& fromStringResource(WebCoreStringResourceBase* resource) |
44 { | 44 { |
45 return resource->webcoreString(); | 45 return resource->webcoreString(); |
46 } | 46 } |
47 template <typename V8StringTrait> | 47 template <typename V8StringTrait> |
48 static String fromV8String(v8::Handle<v8::String>, int); | 48 static String fromV8String(v8::Local<v8::String>, int); |
49 }; | 49 }; |
50 | 50 |
51 template<> | 51 template<> |
52 struct StringTraits<AtomicString> { | 52 struct StringTraits<AtomicString> { |
53 static const AtomicString& fromStringResource(WebCoreStringResourceBase* res
ource) | 53 static const AtomicString& fromStringResource(WebCoreStringResourceBase* res
ource) |
54 { | 54 { |
55 return resource->atomicString(); | 55 return resource->atomicString(); |
56 } | 56 } |
57 template <typename V8StringTrait> | 57 template <typename V8StringTrait> |
58 static AtomicString fromV8String(v8::Handle<v8::String>, int); | 58 static AtomicString fromV8String(v8::Local<v8::String>, int); |
59 }; | 59 }; |
60 | 60 |
61 struct V8StringTwoBytesTrait { | 61 struct V8StringTwoBytesTrait { |
62 typedef UChar CharType; | 62 typedef UChar CharType; |
63 ALWAYS_INLINE static void write(v8::Handle<v8::String> v8String, CharType* b
uffer, int length) | 63 ALWAYS_INLINE static void write(v8::Local<v8::String> v8String, CharType* bu
ffer, int length) |
64 { | 64 { |
65 v8String->Write(reinterpret_cast<uint16_t*>(buffer), 0, length); | 65 v8String->Write(reinterpret_cast<uint16_t*>(buffer), 0, length); |
66 } | 66 } |
67 }; | 67 }; |
68 | 68 |
69 struct V8StringOneByteTrait { | 69 struct V8StringOneByteTrait { |
70 typedef LChar CharType; | 70 typedef LChar CharType; |
71 ALWAYS_INLINE static void write(v8::Handle<v8::String> v8String, CharType* b
uffer, int length) | 71 ALWAYS_INLINE static void write(v8::Local<v8::String> v8String, CharType* bu
ffer, int length) |
72 { | 72 { |
73 v8String->WriteOneByte(buffer, 0, length); | 73 v8String->WriteOneByte(buffer, 0, length); |
74 } | 74 } |
75 }; | 75 }; |
76 | 76 |
77 template <typename V8StringTrait> | 77 template <typename V8StringTrait> |
78 String StringTraits<String>::fromV8String(v8::Handle<v8::String> v8String, int l
ength) | 78 String StringTraits<String>::fromV8String(v8::Local<v8::String> v8String, int le
ngth) |
79 { | 79 { |
80 ASSERT(v8String->Length() == length); | 80 ASSERT(v8String->Length() == length); |
81 typename V8StringTrait::CharType* buffer; | 81 typename V8StringTrait::CharType* buffer; |
82 String result = String::createUninitialized(length, buffer); | 82 String result = String::createUninitialized(length, buffer); |
83 V8StringTrait::write(v8String, buffer, length); | 83 V8StringTrait::write(v8String, buffer, length); |
84 return result; | 84 return result; |
85 } | 85 } |
86 | 86 |
87 template <typename V8StringTrait> | 87 template <typename V8StringTrait> |
88 AtomicString StringTraits<AtomicString>::fromV8String(v8::Handle<v8::String> v8S
tring, int length) | 88 AtomicString StringTraits<AtomicString>::fromV8String(v8::Local<v8::String> v8St
ring, int length) |
89 { | 89 { |
90 ASSERT(v8String->Length() == length); | 90 ASSERT(v8String->Length() == length); |
91 static const int inlineBufferSize = 32 / sizeof(typename V8StringTrait::Char
Type); | 91 static const int inlineBufferSize = 32 / sizeof(typename V8StringTrait::Char
Type); |
92 if (length <= inlineBufferSize) { | 92 if (length <= inlineBufferSize) { |
93 typename V8StringTrait::CharType inlineBuffer[inlineBufferSize]; | 93 typename V8StringTrait::CharType inlineBuffer[inlineBufferSize]; |
94 V8StringTrait::write(v8String, inlineBuffer, length); | 94 V8StringTrait::write(v8String, inlineBuffer, length); |
95 return AtomicString(inlineBuffer, length); | 95 return AtomicString(inlineBuffer, length); |
96 } | 96 } |
97 typename V8StringTrait::CharType* buffer; | 97 typename V8StringTrait::CharType* buffer; |
98 String string = String::createUninitialized(length, buffer); | 98 String string = String::createUninitialized(length, buffer); |
99 V8StringTrait::write(v8String, buffer, length); | 99 V8StringTrait::write(v8String, buffer, length); |
100 return AtomicString(string); | 100 return AtomicString(string); |
101 } | 101 } |
102 | 102 |
103 template<typename StringType> | 103 template<typename StringType> |
104 StringType v8StringToWebCoreString(v8::Handle<v8::String> v8String, ExternalMode
external) | 104 StringType v8StringToWebCoreString(v8::Local<v8::String> v8String, ExternalMode
external) |
105 { | 105 { |
106 { | 106 { |
107 // This portion of this function is very hot in certain Dromeao benchmar
ks. | 107 // This portion of this function is very hot in certain Dromeao benchmar
ks. |
108 v8::String::Encoding encoding; | 108 v8::String::Encoding encoding; |
109 v8::String::ExternalStringResourceBase* resource = v8String->GetExternal
StringResourceBase(&encoding); | 109 v8::String::ExternalStringResourceBase* resource = v8String->GetExternal
StringResourceBase(&encoding); |
110 if (LIKELY(!!resource)) { | 110 if (LIKELY(!!resource)) { |
111 WebCoreStringResourceBase* base; | 111 WebCoreStringResourceBase* base; |
112 if (encoding == v8::String::ONE_BYTE_ENCODING) | 112 if (encoding == v8::String::ONE_BYTE_ENCODING) |
113 base = static_cast<WebCoreStringResource8*>(resource); | 113 base = static_cast<WebCoreStringResource8*>(resource); |
114 else | 114 else |
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134 } else { | 134 } else { |
135 WebCoreStringResource16* stringResource = new WebCoreStringResource16(re
sult); | 135 WebCoreStringResource16* stringResource = new WebCoreStringResource16(re
sult); |
136 if (UNLIKELY(!v8String->MakeExternal(stringResource))) | 136 if (UNLIKELY(!v8String->MakeExternal(stringResource))) |
137 delete stringResource; | 137 delete stringResource; |
138 } | 138 } |
139 return result; | 139 return result; |
140 } | 140 } |
141 | 141 |
142 // Explicitly instantiate the above template with the expected parameterizations
, | 142 // Explicitly instantiate the above template with the expected parameterizations
, |
143 // to ensure the compiler generates the code; otherwise link errors can result i
n GCC 4.4. | 143 // to ensure the compiler generates the code; otherwise link errors can result i
n GCC 4.4. |
144 template String v8StringToWebCoreString<String>(v8::Handle<v8::String>, External
Mode); | 144 template String v8StringToWebCoreString<String>(v8::Local<v8::String>, ExternalM
ode); |
145 template AtomicString v8StringToWebCoreString<AtomicString>(v8::Handle<v8::Strin
g>, ExternalMode); | 145 template AtomicString v8StringToWebCoreString<AtomicString>(v8::Local<v8::String
>, ExternalMode); |
146 | 146 |
147 // Fast but non thread-safe version. | 147 // Fast but non thread-safe version. |
148 String int32ToWebCoreStringFast(int value) | 148 String int32ToWebCoreStringFast(int value) |
149 { | 149 { |
150 // Caching of small strings below is not thread safe: newly constructed Atom
icString | 150 // Caching of small strings below is not thread safe: newly constructed Atom
icString |
151 // are not safely published. | 151 // are not safely published. |
152 ASSERT(isMainThread()); | 152 ASSERT(isMainThread()); |
153 | 153 |
154 // Most numbers used are <= 100. Even if they aren't used there's very littl
e cost in using the space. | 154 // Most numbers used are <= 100. Even if they aren't used there's very littl
e cost in using the space. |
155 const int kLowNumbers = 100; | 155 const int kLowNumbers = 100; |
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170 | 170 |
171 String int32ToWebCoreString(int value) | 171 String int32ToWebCoreString(int value) |
172 { | 172 { |
173 // If we are on the main thread (this should always true for non-workers), c
all the faster one. | 173 // If we are on the main thread (this should always true for non-workers), c
all the faster one. |
174 if (isMainThread()) | 174 if (isMainThread()) |
175 return int32ToWebCoreStringFast(value); | 175 return int32ToWebCoreStringFast(value); |
176 return String::number(value); | 176 return String::number(value); |
177 } | 177 } |
178 | 178 |
179 } // namespace blink | 179 } // namespace blink |
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