Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 4 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5 | #include "src/extensions/externalize-string-extension.h" |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 6 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 7 | #include "src/api.h" |
| 8 | #include "src/handles.h" |
| 9 | #include "src/isolate.h" |
| 10 | |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | |
| 14 | template <typename Char, typename Base> |
| 15 | class SimpleStringResource : public Base { |
| 16 | public: |
| 17 | // Takes ownership of |data|. |
| 18 | SimpleStringResource(Char* data, size_t length) |
| 19 | : data_(data), |
| 20 | length_(length) {} |
| 21 | |
| 22 | virtual ~SimpleStringResource() { delete[] data_; } |
| 23 | |
| 24 | virtual const Char* data() const { return data_; } |
| 25 | |
| 26 | virtual size_t length() const { return length_; } |
| 27 | |
| 28 | private: |
| 29 | Char* const data_; |
| 30 | const size_t length_; |
| 31 | }; |
| 32 | |
| 33 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 34 | typedef SimpleStringResource<char, v8::String::ExternalOneByteStringResource> |
| 35 | SimpleOneByteStringResource; |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 36 | typedef SimpleStringResource<uc16, v8::String::ExternalStringResource> |
| 37 | SimpleTwoByteStringResource; |
| 38 | |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 39 | const char* const ExternalizeStringExtension::kSource = |
| 40 | "native function externalizeString();" |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 41 | "native function isOneByteString();" |
| 42 | "function x() { return 1; }"; |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 43 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 44 | v8::Local<v8::FunctionTemplate> |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 45 | ExternalizeStringExtension::GetNativeFunctionTemplate( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 46 | v8::Isolate* isolate, v8::Local<v8::String> str) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 47 | if (strcmp(*v8::String::Utf8Value(str), "externalizeString") == 0) { |
| 48 | return v8::FunctionTemplate::New(isolate, |
| 49 | ExternalizeStringExtension::Externalize); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 50 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 51 | DCHECK(strcmp(*v8::String::Utf8Value(str), "isOneByteString") == 0); |
| 52 | return v8::FunctionTemplate::New(isolate, |
| 53 | ExternalizeStringExtension::IsOneByte); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 54 | } |
| 55 | } |
| 56 | |
| 57 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 58 | void ExternalizeStringExtension::Externalize( |
| 59 | const v8::FunctionCallbackInfo<v8::Value>& args) { |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 60 | if (args.Length() < 1 || !args[0]->IsString()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 61 | args.GetIsolate()->ThrowException( |
| 62 | v8::String::NewFromUtf8( |
| 63 | args.GetIsolate(), |
| 64 | "First parameter to externalizeString() must be a string.", |
| 65 | NewStringType::kNormal).ToLocalChecked()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 66 | return; |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 67 | } |
| 68 | bool force_two_byte = false; |
| 69 | if (args.Length() >= 2) { |
| 70 | if (args[1]->IsBoolean()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 71 | force_two_byte = |
| 72 | args[1] |
| 73 | ->BooleanValue(args.GetIsolate()->GetCurrentContext()) |
| 74 | .FromJust(); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 75 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 76 | args.GetIsolate()->ThrowException( |
| 77 | v8::String::NewFromUtf8( |
| 78 | args.GetIsolate(), |
| 79 | "Second parameter to externalizeString() must be a boolean.", |
| 80 | NewStringType::kNormal).ToLocalChecked()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 81 | return; |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 82 | } |
| 83 | } |
| 84 | bool result = false; |
| 85 | Handle<String> string = Utils::OpenHandle(*args[0].As<v8::String>()); |
| 86 | if (string->IsExternalString()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 87 | args.GetIsolate()->ThrowException( |
| 88 | v8::String::NewFromUtf8(args.GetIsolate(), |
| 89 | "externalizeString() can't externalize twice.", |
| 90 | NewStringType::kNormal).ToLocalChecked()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 91 | return; |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 92 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 93 | if (string->IsOneByteRepresentation() && !force_two_byte) { |
| 94 | uint8_t* data = new uint8_t[string->length()]; |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 95 | String::WriteToFlat(*string, data, 0, string->length()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 96 | SimpleOneByteStringResource* resource = new SimpleOneByteStringResource( |
| 97 | reinterpret_cast<char*>(data), string->length()); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 98 | result = string->MakeExternal(resource); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 99 | if (result) { |
| 100 | i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 101 | isolate->heap()->RegisterExternalString(*string); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 102 | } |
| 103 | if (!result) delete resource; |
| 104 | } else { |
| 105 | uc16* data = new uc16[string->length()]; |
| 106 | String::WriteToFlat(*string, data, 0, string->length()); |
| 107 | SimpleTwoByteStringResource* resource = new SimpleTwoByteStringResource( |
| 108 | data, string->length()); |
| 109 | result = string->MakeExternal(resource); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 110 | if (result) { |
| 111 | i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 112 | isolate->heap()->RegisterExternalString(*string); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 113 | } |
| 114 | if (!result) delete resource; |
| 115 | } |
| 116 | if (!result) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 117 | args.GetIsolate()->ThrowException( |
| 118 | v8::String::NewFromUtf8(args.GetIsolate(), |
| 119 | "externalizeString() failed.", |
| 120 | NewStringType::kNormal).ToLocalChecked()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 121 | return; |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 122 | } |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 123 | } |
| 124 | |
| 125 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 126 | void ExternalizeStringExtension::IsOneByte( |
| 127 | const v8::FunctionCallbackInfo<v8::Value>& args) { |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 128 | if (args.Length() != 1 || !args[0]->IsString()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 129 | args.GetIsolate()->ThrowException( |
| 130 | v8::String::NewFromUtf8( |
| 131 | args.GetIsolate(), |
| 132 | "isOneByteString() requires a single string argument.", |
| 133 | NewStringType::kNormal).ToLocalChecked()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 134 | return; |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 135 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 136 | bool is_one_byte = |
| 137 | Utils::OpenHandle(*args[0].As<v8::String>())->IsOneByteRepresentation(); |
| 138 | args.GetReturnValue().Set(is_one_byte); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 139 | } |
| 140 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 141 | } // namespace internal |
| 142 | } // namespace v8 |