mirror of https://github.com/lukechilds/node.git
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This is a big commit that touches just about every file in the src/ directory. The V8 API has changed in significant ways. The most important changes are: * Binding functions take a const v8::FunctionCallbackInfo<T>& argument rather than a const v8::Arguments& argument. * Binding functions return void rather than v8::Handle<v8::Value>. The return value is returned with the args.GetReturnValue().Set() family of functions. * v8::Persistent<T> no longer derives from v8::Handle<T> and no longer allows you to directly dereference the object that the persistent handle points to. This means that the common pattern of caching oft-used JS values in a persistent handle no longer quite works, you first need to reconstruct a v8::Local<T> from the persistent handle with the Local<T>::New(isolate, persistent) factory method. A handful of (internal) convenience classes and functions have been added to make dealing with the new API a little easier. The most visible one is node::Cached<T>, which wraps a v8::Persistent<T> with some template sugar. It can hold arbitrary types but so far it's exclusively used for v8::Strings (which was by far the most commonly cached handle type.)v0.11.4-release
Ben Noordhuis
11 years ago
43 changed files with 2241 additions and 3609 deletions
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@ -1,874 +0,0 @@ |
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// V8 Typed Array implementation.
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// (c) Dean McNamee <dean@gmail.com>, 2011.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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#include <stdlib.h> // calloc, etc |
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#include <string.h> // memmove |
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#include <stdint.h> |
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#include "v8_typed_array.h" |
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#include "v8_typed_array_bswap.h" |
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#include "node_buffer.h" |
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#include "node.h" |
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#include "v8.h" |
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namespace { |
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using node::ThrowError; |
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using node::ThrowRangeError; |
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using node::ThrowTypeError; |
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struct BatchedMethods { |
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const char* name; |
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v8::Handle<v8::Value> (*func)(const v8::Arguments& args); |
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}; |
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class ArrayBuffer { |
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public: |
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static v8::Persistent<v8::FunctionTemplate> GetTemplate() { |
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static v8::Persistent<v8::FunctionTemplate> ft_cache; |
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if (!ft_cache.IsEmpty()) |
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return ft_cache; |
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v8::HandleScope scope(node::node_isolate); |
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ft_cache = v8::Persistent<v8::FunctionTemplate>::New(node::node_isolate, |
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v8::FunctionTemplate::New(&ArrayBuffer::V8New)); |
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ft_cache->SetClassName(v8::String::New("ArrayBuffer")); |
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v8::Local<v8::ObjectTemplate> instance = ft_cache->InstanceTemplate(); |
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instance->SetInternalFieldCount(1); // Buffer.
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v8::Local<v8::Signature> default_signature = v8::Signature::New(ft_cache); |
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instance->Set(v8::String::New("slice"), |
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v8::FunctionTemplate::New(&ArrayBuffer::slice, |
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v8::Handle<v8::Value>(), |
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default_signature)); |
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return ft_cache; |
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} |
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static bool HasInstance(v8::Handle<v8::Value> value) { |
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return GetTemplate()->HasInstance(value); |
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} |
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private: |
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static void WeakCallback(v8::Isolate* isolate, |
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v8::Persistent<v8::Object>* pobj, |
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void* data) { |
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v8::HandleScope handle_scope(isolate); |
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v8::Local<v8::Object> obj = v8::Local<v8::Object>::New(*pobj); |
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void* ptr = obj->GetIndexedPropertiesExternalArrayData(); |
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int element_size = v8_typed_array::SizeOfArrayElementForType( |
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obj->GetIndexedPropertiesExternalArrayDataType()); |
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int size = |
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obj->GetIndexedPropertiesExternalArrayDataLength() * element_size; |
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node::node_isolate->AdjustAmountOfExternalAllocatedMemory(-size); |
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(*pobj).ClearWeak(isolate); |
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(*pobj).Dispose(isolate); |
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free(ptr); |
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} |
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static v8::Handle<v8::Value> V8New(const v8::Arguments& args) { |
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if (!args.IsConstructCall()) |
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return node::FromConstructorTemplate(GetTemplate(), args); |
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|
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// To match Chrome, we allow "new ArrayBuffer()".
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// if (args.Length() != 1)
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// return ThrowError("Wrong number of arguments.");
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if (args[0]->Int32Value() < 0) { |
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return ThrowRangeError("ArrayBufferView size is not a small enough " |
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"positive integer."); |
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} |
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size_t num_bytes = args[0]->Uint32Value(); |
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if (num_bytes > node::Buffer::kMaxLength) { |
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return ThrowRangeError("length > kMaxLength"); |
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} |
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void* buf = calloc(num_bytes, 1); |
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if (!buf) |
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return ThrowError("Unable to allocate ArrayBuffer."); |
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args.This()->SetAlignedPointerInInternalField(0, buf); |
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args.This()->Set(v8::String::New("byteLength"), |
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v8::Integer::NewFromUnsigned(num_bytes, |
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node::node_isolate), |
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(v8::PropertyAttribute)(v8::ReadOnly|v8::DontDelete)); |
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// NOTE(deanm): This is not in the spec, you shouldn't be able to index
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// the ArrayBuffer. However, it currently simplifies some handling in our
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// implementation, so we make ArrayView operator[] act like an Uint8Array.
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// , This allows DataView to work with both ArrayBuffers and TypedArrays.
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args.This()->SetIndexedPropertiesToExternalArrayData( |
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buf, v8::kExternalUnsignedByteArray, num_bytes); |
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node::node_isolate->AdjustAmountOfExternalAllocatedMemory(num_bytes); |
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v8::Persistent<v8::Object> persistent = |
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v8::Persistent<v8::Object>::New(node::node_isolate, args.This()); |
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persistent.MakeWeak(node::node_isolate, |
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static_cast<void*>(NULL), |
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&ArrayBuffer::WeakCallback); |
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return args.This(); |
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} |
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static v8::Handle<v8::Value> slice(const v8::Arguments& args) { |
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if (args.Length() < 1) |
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return ThrowError("Wrong number of arguments."); |
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unsigned int length = |
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args.This()->Get(v8::String::New("byteLength"))->Uint32Value(); |
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int begin = args[0]->Int32Value(); |
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int end = length; |
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if (args.Length() > 1) |
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end = args[1]->Int32Value(); |
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if (begin < 0) begin = length + begin; |
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if (begin < 0) begin = 0; |
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if (static_cast<unsigned>(begin) > length) begin = length; |
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if (end < 0) end = length + end; |
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if (end < 0) end = 0; |
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if (static_cast<unsigned>(end) > length) end = length; |
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if (begin > end) begin = end; |
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unsigned int slice_length = end - begin; |
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v8::Local<v8::Value> argv[] = { |
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v8::Integer::New(slice_length, node::node_isolate)}; |
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v8::Local<v8::Object> buffer = ArrayBuffer::GetTemplate()-> |
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GetFunction()->NewInstance(1, argv); |
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// constructor failed
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if (buffer.IsEmpty()) return v8::Undefined(node::node_isolate); |
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void* src = args.This()->GetAlignedPointerFromInternalField(0); |
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void* dest = buffer->GetAlignedPointerFromInternalField(0); |
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memcpy(dest, static_cast<char*>(src) + begin, slice_length); |
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return buffer; |
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} |
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}; |
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static bool checkAlignment(size_t val, unsigned int bytes) { |
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return (val & (bytes - 1)) == 0; // Handles bytes == 0.
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} |
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template <v8::ExternalArrayType TEAType> |
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struct TEANameTrait { |
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static const char* const name; |
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}; |
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template <> const char* const |
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TEANameTrait<v8::kExternalByteArray>::name = "Int8Array"; |
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template <> const char* const |
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TEANameTrait<v8::kExternalUnsignedByteArray>::name = "Uint8Array"; |
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template <> const char* const |
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TEANameTrait<v8::kExternalPixelArray>::name = "Uint8ClampedArray"; |
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template <> const char* const |
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TEANameTrait<v8::kExternalShortArray>::name = "Int16Array"; |
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template <> const char* const |
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TEANameTrait<v8::kExternalUnsignedShortArray>::name = "Uint16Array"; |
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template <> const char* const |
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TEANameTrait<v8::kExternalIntArray>::name = "Int32Array"; |
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template <> const char* const |
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TEANameTrait<v8::kExternalUnsignedIntArray>::name = "Uint32Array"; |
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template <> const char* const |
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TEANameTrait<v8::kExternalFloatArray>::name = "Float32Array"; |
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template <> const char* const |
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TEANameTrait<v8::kExternalDoubleArray>::name = "Float64Array"; |
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template <unsigned int TBytes, v8::ExternalArrayType TEAType> |
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class TypedArray { |
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public: |
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static v8::Persistent<v8::FunctionTemplate> GetTemplate() { |
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static v8::Persistent<v8::FunctionTemplate> ft_cache; |
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if (!ft_cache.IsEmpty()) |
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return ft_cache; |
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v8::HandleScope scope(node::node_isolate); |
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ft_cache = v8::Persistent<v8::FunctionTemplate>::New(node::node_isolate, |
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v8::FunctionTemplate::New(&TypedArray<TBytes, TEAType>::V8New)); |
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ft_cache->SetClassName(v8::String::New(TEANameTrait<TEAType>::name)); |
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v8::Local<v8::ObjectTemplate> instance = ft_cache->InstanceTemplate(); |
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instance->SetInternalFieldCount(0); |
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ft_cache->Set(v8::String::New("BYTES_PER_ELEMENT"), |
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v8::Uint32::New(TBytes, node::node_isolate), v8::ReadOnly); |
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instance->Set(v8::String::New("BYTES_PER_ELEMENT"), |
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v8::Uint32::New(TBytes, node::node_isolate), v8::ReadOnly); |
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v8::Local<v8::Signature> default_signature = v8::Signature::New(ft_cache); |
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static BatchedMethods methods[] = { |
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{ "get", &TypedArray<TBytes, TEAType>::get }, |
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{ "set", &TypedArray<TBytes, TEAType>::set }, |
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{ "slice", &TypedArray<TBytes, TEAType>::subarray }, |
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{ "subarray", &TypedArray<TBytes, TEAType>::subarray }, |
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}; |
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for (size_t i = 0; i < sizeof(methods) / sizeof(*methods); ++i) { |
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instance->Set(v8::String::New(methods[i].name), |
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v8::FunctionTemplate::New(methods[i].func, |
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v8::Handle<v8::Value>(), |
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default_signature)); |
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} |
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return ft_cache; |
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} |
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static bool HasInstance(v8::Handle<v8::Value> value) { |
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return GetTemplate()->HasInstance(value); |
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} |
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private: |
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static v8::Handle<v8::Value> V8New(const v8::Arguments& args) { |
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if (!args.IsConstructCall()) |
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return node::FromConstructorTemplate(GetTemplate(), args); |
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// To match Chrome, we allow "new Float32Array()".
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// if (args.Length() != 1)
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// return ThrowError("Wrong number of arguments.");
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v8::Local<v8::Object> buffer; |
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unsigned int length = 0; |
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unsigned int byte_offset = 0; |
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if (ArrayBuffer::HasInstance(args[0])) { // ArrayBuffer constructor.
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buffer = v8::Local<v8::Object>::Cast(args[0]); |
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size_t buflen = |
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buffer->GetIndexedPropertiesExternalArrayDataLength(); |
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if (!args[1]->IsUndefined() && args[1]->Int32Value() < 0) |
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return ThrowRangeError("Byte offset out of range."); |
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byte_offset = args[1]->Uint32Value(); |
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if (args.Length() > 2) { |
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if (args[2]->Int32Value() < 0) |
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return ThrowRangeError("Length out of range."); |
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length = args[2]->Uint32Value(); |
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} else { |
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if (buflen < byte_offset || |
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!checkAlignment(buflen - byte_offset, TBytes)) { |
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return ThrowRangeError("Byte offset / length is not aligned."); |
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} |
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length = (buflen - byte_offset) / TBytes; |
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} |
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// NOTE(deanm): Sloppy integer overflow checks.
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if (byte_offset > buflen || byte_offset + length > buflen || |
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byte_offset + length * TBytes > buflen) { |
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return ThrowRangeError("Length is out of range."); |
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} |
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void* buf = buffer->GetIndexedPropertiesExternalArrayData(); |
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char* begin = reinterpret_cast<char*>(buf) + byte_offset; |
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if (!checkAlignment(reinterpret_cast<uintptr_t>(begin), TBytes)) |
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return ThrowRangeError("Byte offset is not aligned."); |
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args.This()->SetIndexedPropertiesToExternalArrayData( |
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begin, TEAType, length); |
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} |
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else if (args[0]->IsObject()) { // TypedArray / type[] constructor.
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v8::Local<v8::Object> obj = v8::Local<v8::Object>::Cast(args[0]); |
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length = obj->Get(v8::String::New("length"))->Uint32Value(); |
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// TODO(deanm): Handle integer overflow.
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v8::Local<v8::Value> argv[1] = { |
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v8::Integer::NewFromUnsigned(length * TBytes, node::node_isolate)}; |
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buffer = ArrayBuffer::GetTemplate()-> |
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GetFunction()->NewInstance(1, argv); |
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// constructor failed
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if (buffer.IsEmpty()) return v8::Undefined(node::node_isolate); |
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void* buf = buffer->GetAlignedPointerFromInternalField(0); |
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args.This()->SetIndexedPropertiesToExternalArrayData( |
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buf, TEAType, length); |
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// TODO(deanm): check for failure.
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for (uint32_t i = 0; i < length; ++i) { |
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// Use the v8 setter to deal with typing. Maybe slow?
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args.This()->Set(i, obj->Get(i)); |
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} |
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} else { // length constructor.
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// Try to match Chrome, Float32Array(""), Float32Array(true/false) is
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// okay, but Float32Array(null) throws a TypeError and
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// Float32Array(undefined) throw a RangeError.
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if (args.Length() > 0 && (args[0]->IsUndefined() || args[0]->IsNull())) |
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return ThrowTypeError("Type error"); |
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if (args[0]->Int32Value() < 0) { |
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return ThrowRangeError("ArrayBufferView size is not a small enough " |
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"positive integer."); |
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} |
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|
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length = args[0]->Uint32Value(); |
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// TODO(deanm): Handle integer overflow.
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v8::Local<v8::Value> argv[1] = { |
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v8::Integer::NewFromUnsigned(length * TBytes, node::node_isolate)}; |
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buffer = ArrayBuffer::GetTemplate()-> |
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GetFunction()->NewInstance(1, argv); |
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// constructor failed
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if (buffer.IsEmpty()) return v8::Undefined(node::node_isolate); |
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void* buf = buffer->GetAlignedPointerFromInternalField(0); |
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args.This()->SetIndexedPropertiesToExternalArrayData( |
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buf, TEAType, length); |
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// TODO(deanm): check for failure.
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} |
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args.This()->Set(v8::String::New("buffer"), |
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buffer, |
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(v8::PropertyAttribute)(v8::ReadOnly|v8::DontDelete)); |
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args.This()->Set(v8::String::New("length"), |
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v8::Integer::NewFromUnsigned(length, node::node_isolate), |
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(v8::PropertyAttribute)(v8::ReadOnly|v8::DontDelete)); |
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args.This()->Set(v8::String::New("byteOffset"), |
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v8::Integer::NewFromUnsigned(byte_offset, |
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node::node_isolate), |
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(v8::PropertyAttribute)(v8::ReadOnly|v8::DontDelete)); |
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args.This()->Set(v8::String::New("byteLength"), |
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v8::Integer::NewFromUnsigned(length * TBytes, |
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node::node_isolate), |
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(v8::PropertyAttribute)(v8::ReadOnly|v8::DontDelete)); |
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return args.This(); |
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} |
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|
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static v8::Handle<v8::Value> get(const v8::Arguments& args) { |
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if (args.Length() < 1) |
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return ThrowError("Wrong number of arguments."); |
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|
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if (args[0]->IsNumber()) |
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return args.This()->Get(args[0]->Uint32Value()); |
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|
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return v8::Undefined(node::node_isolate); |
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} |
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|
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static v8::Handle<v8::Value> set(const v8::Arguments& args) { |
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if (args.Length() < 1) |
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return ThrowError("Wrong number of arguments."); |
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|
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//if (!args[0]->IsObject())
|
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// return ThrowTypeError("Type error.");
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|
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if (args[0]->IsNumber()) { // index, <type> value
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args.This()->Set(args[0]->Uint32Value(), args[1]); |
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} else if (args[0]->IsObject()) { |
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v8::Handle<v8::Object> obj = v8::Handle<v8::Object>::Cast(args[0]); |
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|
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if (TypedArray<TBytes, TEAType>::HasInstance(obj)) { // ArrayBufferView.
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if (args[1]->Int32Value() < 0) |
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return ThrowRangeError("Offset may not be negative."); |
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|
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unsigned int offset = args[1]->Uint32Value(); |
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unsigned int src_length = |
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obj->Get(v8::String::New("length"))->Uint32Value(); |
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unsigned int dst_length = |
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args.This()->Get(v8::String::New("length"))->Uint32Value(); |
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if (offset > dst_length) |
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return ThrowRangeError("Offset out of range."); |
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|
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if (src_length > dst_length - offset) |
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return ThrowRangeError("Offset/length out of range."); |
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|
|||
// We don't want to get the buffer pointer, because that means we'll have
|
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// to just do the calculations for byteOffset / byteLength again.
|
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// Instead just use the pointer on the external array data.
|
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void* src_ptr = obj->GetIndexedPropertiesExternalArrayData(); |
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void* dst_ptr = args.This()->GetIndexedPropertiesExternalArrayData(); |
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|
|||
// From the spec:
|
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// If the input array is a TypedArray, the two arrays may use the same
|
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// underlying ArrayBuffer. In this situation, setting the values takes
|
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// place as if all the data is first copied into a temporary buffer that
|
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// does not overlap either of the arrays, and then the data from the
|
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// temporary buffer is copied into the current array.
|
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memmove(reinterpret_cast<char*>(dst_ptr) + offset * TBytes, src_ptr, |
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src_length * TBytes); |
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} else { // type[]
|
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if (args[1]->Int32Value() < 0) |
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return ThrowRangeError("Offset may not be negative."); |
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|
|||
unsigned int src_length = |
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obj->Get(v8::String::New("length"))->Uint32Value(); |
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unsigned int dst_length = |
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args.This()->Get(v8::String::New("length"))->Uint32Value(); |
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unsigned int offset = args[1]->Uint32Value(); |
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|
|||
if (offset > dst_length) |
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return ThrowRangeError("Offset out of range."); |
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|
|||
if (src_length > dst_length - offset) |
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return ThrowRangeError("Offset/length out of range."); |
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|
|||
for (uint32_t i = 0; i < src_length; ++i) { |
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// Use the v8 setter to deal with typing. Maybe slow?
|
|||
args.This()->Set(i + offset, obj->Get(i)); |
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} |
|||
} |
|||
} |
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|
|||
return v8::Undefined(node::node_isolate); |
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} |
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|
|||
static v8::Handle<v8::Value> subarray(const v8::Arguments& args) { |
|||
// TODO(deanm): The unsigned / signed type mixing makes me super nervous.
|
|||
|
|||
unsigned int length = |
|||
args.This()->Get(v8::String::New("length"))->Uint32Value(); |
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int begin = args[0]->Int32Value(); |
|||
int end = length; |
|||
if (args.Length() > 1) |
|||
end = args[1]->Int32Value(); |
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|
|||
if (begin < 0) begin = length + begin; |
|||
if (begin < 0) begin = 0; |
|||
if ((unsigned)begin > length) begin = length; |
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|
|||
if (end < 0) end = length + end; |
|||
if (end < 0) end = 0; |
|||
if ((unsigned)end > length) end = length; |
|||
|
|||
if (begin > end) begin = end; |
|||
|
|||
int byte_offset = begin * TBytes + |
|||
args.This()->Get(v8::String::New("byteOffset"))->Uint32Value(); |
|||
|
|||
// Call through to the ArrayBuffer, byteOffset, length constructor.
|
|||
v8::Local<v8::Value> argv[] = { |
|||
args.This()->Get(v8::String::New("buffer")), |
|||
v8::Integer::New(byte_offset, node::node_isolate), |
|||
v8::Integer::New(end - begin, node::node_isolate)}; |
|||
return TypedArray<TBytes, TEAType>::GetTemplate()-> |
|||
GetFunction()->NewInstance(3, argv); |
|||
} |
|||
}; |
|||
|
|||
class Int8Array : public TypedArray<1, v8::kExternalByteArray> { }; |
|||
class Uint8Array : public TypedArray<1, v8::kExternalUnsignedByteArray> { }; |
|||
class Uint8ClampedArray : public TypedArray<1, v8::kExternalPixelArray> { }; |
|||
class Int16Array : public TypedArray<2, v8::kExternalShortArray> { }; |
|||
class Uint16Array : public TypedArray<2, v8::kExternalUnsignedShortArray> { }; |
|||
class Int32Array : public TypedArray<4, v8::kExternalIntArray> { }; |
|||
class Uint32Array : public TypedArray<4, v8::kExternalUnsignedIntArray> { }; |
|||
class Float32Array : public TypedArray<4, v8::kExternalFloatArray> { }; |
|||
class Float64Array : public TypedArray<8, v8::kExternalDoubleArray> { }; |
|||
|
|||
template <typename T> |
|||
v8::Handle<v8::Value> cTypeToValue(T) { |
|||
return v8::Undefined(node::node_isolate); |
|||
} |
|||
|
|||
template <> |
|||
v8::Handle<v8::Value> cTypeToValue(unsigned char val) { |
|||
return v8::Integer::NewFromUnsigned(val, node::node_isolate); |
|||
} |
|||
|
|||
template <> |
|||
v8::Handle<v8::Value> cTypeToValue(signed char val) { |
|||
return v8::Integer::New(val, node::node_isolate); |
|||
} |
|||
|
|||
template <> |
|||
v8::Handle<v8::Value> cTypeToValue(unsigned short val) { |
|||
return v8::Integer::NewFromUnsigned(val, node::node_isolate); |
|||
} |
|||
|
|||
template <> |
|||
v8::Handle<v8::Value> cTypeToValue(short val) { |
|||
return v8::Integer::New(val, node::node_isolate); |
|||
} |
|||
|
|||
template <> |
|||
v8::Handle<v8::Value> cTypeToValue(unsigned int val) { |
|||
return v8::Integer::NewFromUnsigned(val, node::node_isolate); |
|||
} |
|||
|
|||
template <> |
|||
v8::Handle<v8::Value> cTypeToValue(int val) { |
|||
return v8::Integer::New(val, node::node_isolate); |
|||
} |
|||
|
|||
template <> |
|||
v8::Handle<v8::Value> cTypeToValue(float val) { |
|||
return v8::Number::New(val); |
|||
} |
|||
|
|||
template <> |
|||
v8::Handle<v8::Value> cTypeToValue(double val) { |
|||
return v8::Number::New(val); |
|||
} |
|||
|
|||
|
|||
template <typename T> |
|||
T valueToCType(v8::Handle<v8::Value> value) { |
|||
return 0; |
|||
} |
|||
|
|||
template <> |
|||
unsigned char valueToCType(v8::Handle<v8::Value> value) { |
|||
return value->Uint32Value(); |
|||
} |
|||
|
|||
template <> |
|||
signed char valueToCType(v8::Handle<v8::Value> value) { |
|||
return value->Int32Value(); |
|||
} |
|||
|
|||
template <> |
|||
unsigned short valueToCType(v8::Handle<v8::Value> value) { |
|||
return value->Uint32Value(); |
|||
} |
|||
|
|||
template <> |
|||
short valueToCType(v8::Handle<v8::Value> value) { |
|||
return value->Int32Value(); |
|||
} |
|||
|
|||
template <> |
|||
unsigned int valueToCType(v8::Handle<v8::Value> value) { |
|||
return value->Uint32Value(); |
|||
} |
|||
|
|||
template <> |
|||
int valueToCType(v8::Handle<v8::Value> value) { |
|||
return value->Int32Value(); |
|||
} |
|||
|
|||
template <> |
|||
float valueToCType(v8::Handle<v8::Value> value) { |
|||
return static_cast<float>(value->NumberValue()); |
|||
} |
|||
|
|||
template <> |
|||
double valueToCType(v8::Handle<v8::Value> value) { |
|||
return value->NumberValue(); |
|||
} |
|||
|
|||
|
|||
class DataView { |
|||
public: |
|||
static v8::Persistent<v8::FunctionTemplate> GetTemplate() { |
|||
static v8::Persistent<v8::FunctionTemplate> ft_cache; |
|||
if (!ft_cache.IsEmpty()) |
|||
return ft_cache; |
|||
|
|||
v8::HandleScope scope(node::node_isolate); |
|||
ft_cache = v8::Persistent<v8::FunctionTemplate>::New(node::node_isolate, |
|||
v8::FunctionTemplate::New(&DataView::V8New)); |
|||
ft_cache->SetClassName(v8::String::New("DataView")); |
|||
v8::Local<v8::ObjectTemplate> instance = ft_cache->InstanceTemplate(); |
|||
instance->SetInternalFieldCount(0); |
|||
|
|||
v8::Local<v8::Signature> default_signature = v8::Signature::New(ft_cache); |
|||
|
|||
static BatchedMethods methods[] = { |
|||
{ "getUint8", &DataView::getUint8 }, |
|||
{ "getInt8", &DataView::getInt8 }, |
|||
{ "getUint16", &DataView::getUint16 }, |
|||
{ "getInt16", &DataView::getInt16 }, |
|||
{ "getUint32", &DataView::getUint32 }, |
|||
{ "getInt32", &DataView::getInt32 }, |
|||
{ "getFloat32", &DataView::getFloat32 }, |
|||
{ "getFloat64", &DataView::getFloat64 }, |
|||
{ "setUint8", &DataView::setUint8 }, |
|||
{ "setInt8", &DataView::setInt8 }, |
|||
{ "setUint16", &DataView::setUint16 }, |
|||
{ "setInt16", &DataView::setInt16 }, |
|||
{ "setUint32", &DataView::setUint32 }, |
|||
{ "setInt32", &DataView::setInt32 }, |
|||
{ "setFloat32", &DataView::setFloat32 }, |
|||
{ "setFloat64", &DataView::setFloat64 }, |
|||
}; |
|||
|
|||
for (size_t i = 0; i < sizeof(methods) / sizeof(*methods); ++i) { |
|||
instance->Set(v8::String::New(methods[i].name), |
|||
v8::FunctionTemplate::New(methods[i].func, |
|||
v8::Handle<v8::Value>(), |
|||
default_signature)); |
|||
} |
|||
|
|||
return ft_cache; |
|||
} |
|||
|
|||
static bool HasInstance(v8::Handle<v8::Value> value) { |
|||
return GetTemplate()->HasInstance(value); |
|||
} |
|||
|
|||
private: |
|||
static v8::Handle<v8::Value> V8New(const v8::Arguments& args) { |
|||
if (!args.IsConstructCall()) |
|||
return node::FromConstructorTemplate(GetTemplate(), args); |
|||
|
|||
if (args.Length() < 1) |
|||
return ThrowError("Wrong number of arguments."); |
|||
|
|||
if (!args[0]->IsObject()) |
|||
return ThrowError("Object must be an ArrayBuffer."); |
|||
|
|||
v8::Handle<v8::Object> buffer = v8::Handle<v8::Object>::Cast(args[0]); |
|||
if (!ArrayBuffer::HasInstance(buffer)) |
|||
return ThrowError("Object must be an ArrayBuffer."); |
|||
|
|||
unsigned int byte_length = |
|||
buffer->GetIndexedPropertiesExternalArrayDataLength(); |
|||
unsigned int byte_offset = args[1]->Uint32Value(); |
|||
|
|||
if (args[1]->Int32Value() < 0 || byte_offset >= byte_length) |
|||
return ThrowRangeError("byteOffset out of range."); |
|||
|
|||
if (!args[2]->IsUndefined()) { |
|||
if (args[2]->Int32Value() < 0) |
|||
return ThrowRangeError("byteLength out of range."); |
|||
unsigned int new_byte_length = args[2]->Uint32Value(); |
|||
if (new_byte_length > byte_length) |
|||
return ThrowRangeError("byteLength out of range."); |
|||
if (byte_offset + new_byte_length > byte_length) |
|||
return ThrowRangeError("byteOffset/byteLength out of range."); |
|||
byte_length = new_byte_length; |
|||
} else { |
|||
// Adjust the original byte_length from total length to length to end.
|
|||
byte_length -= byte_offset; |
|||
} |
|||
|
|||
void* buf = buffer->GetIndexedPropertiesExternalArrayData(); |
|||
|
|||
// Like ArrayBuffer, we violate the spec and add an operator[].
|
|||
args.This()->SetIndexedPropertiesToExternalArrayData( |
|||
reinterpret_cast<char*>(buf) + byte_offset, |
|||
v8::kExternalUnsignedByteArray, byte_length); |
|||
|
|||
args.This()->Set(v8::String::New("buffer"), |
|||
buffer, |
|||
(v8::PropertyAttribute)(v8::ReadOnly|v8::DontDelete)); |
|||
args.This()->Set(v8::String::New("byteOffset"), |
|||
v8::Integer::NewFromUnsigned(byte_offset, |
|||
node::node_isolate), |
|||
(v8::PropertyAttribute)(v8::ReadOnly|v8::DontDelete)); |
|||
args.This()->Set(v8::String::New("byteLength"), |
|||
v8::Integer::NewFromUnsigned(byte_length, |
|||
node::node_isolate), |
|||
(v8::PropertyAttribute)(v8::ReadOnly|v8::DontDelete)); |
|||
return args.This(); |
|||
} |
|||
|
|||
template <typename T> |
|||
static v8::Handle<v8::Value> getGeneric(const v8::Arguments& args) { |
|||
if (args.Length() < 1) |
|||
return ThrowError("Wrong number of arguments."); |
|||
|
|||
unsigned int index = args[0]->Uint32Value(); |
|||
// NOTE(deanm): args[1]->BooleanValue when the argument was not passed in
|
|||
// gives us the right answer, but seems to be very slow. This seems to be
|
|||
// the cost of calling BooleanValue() on undefined.
|
|||
bool little_endian = args.Length() > 1 ? args[1]->BooleanValue() : false; |
|||
// TODO(deanm): All of these things should be cacheable.
|
|||
int element_size = v8_typed_array::SizeOfArrayElementForType( |
|||
args.This()->GetIndexedPropertiesExternalArrayDataType()); |
|||
assert(element_size > 0); |
|||
int size = args.This()->GetIndexedPropertiesExternalArrayDataLength(); |
|||
assert(size >= 0); |
|||
|
|||
if (static_cast<uint64_t>(index) + sizeof(T) > |
|||
static_cast<uint64_t>(size) * element_size) { |
|||
return ThrowError("Index out of range."); |
|||
} |
|||
|
|||
void* ptr = reinterpret_cast<char*>( |
|||
args.This()->GetIndexedPropertiesExternalArrayData()) + index; |
|||
|
|||
T val; |
|||
#if V8_TYPED_ARRAY_LITTLE_ENDIAN |
|||
if (!little_endian) { |
|||
#else |
|||
if (little_endian) { |
|||
#endif |
|||
val = v8_typed_array::LoadAndSwapBytes<T>(ptr); |
|||
} else { |
|||
memcpy(&val, ptr, sizeof(T)); |
|||
} |
|||
return cTypeToValue<T>(val); |
|||
} |
|||
|
|||
template <typename T> |
|||
static v8::Handle<v8::Value> setGeneric(const v8::Arguments& args) { |
|||
if (args.Length() < 2) |
|||
return ThrowError("Wrong number of arguments."); |
|||
|
|||
unsigned int index = args[0]->Int32Value(); |
|||
// NOTE(deanm): args[1]->BooleanValue when the argument was not passed in
|
|||
// gives us the right answer, but seems to be very slow. This seems to be
|
|||
// the cost of calling BooleanValue() on undefined.
|
|||
bool little_endian = args.Length() > 2 ? args[2]->BooleanValue() : false; |
|||
// TODO(deanm): All of these things should be cacheable.
|
|||
int element_size = v8_typed_array::SizeOfArrayElementForType( |
|||
args.This()->GetIndexedPropertiesExternalArrayDataType()); |
|||
assert(element_size > 0); |
|||
int size = args.This()->GetIndexedPropertiesExternalArrayDataLength(); |
|||
assert(size >= 0); |
|||
|
|||
if (static_cast<uint64_t>(index) + sizeof(T) > |
|||
static_cast<uint64_t>(size) * element_size) { |
|||
return ThrowError("Index out of range."); |
|||
} |
|||
|
|||
void* ptr = reinterpret_cast<char*>( |
|||
args.This()->GetIndexedPropertiesExternalArrayData()) + index; |
|||
|
|||
T val = valueToCType<T>(args[1]); |
|||
#if V8_TYPED_ARRAY_LITTLE_ENDIAN |
|||
if (!little_endian) { |
|||
#else |
|||
if (little_endian) { |
|||
#endif |
|||
v8_typed_array::SwapBytesAndStore<T>(ptr, val); |
|||
} else { |
|||
memcpy(ptr, &val, sizeof(T)); |
|||
} |
|||
return v8::Undefined(node::node_isolate); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> getUint8(const v8::Arguments& args) { |
|||
return getGeneric<unsigned char>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> getInt8(const v8::Arguments& args) { |
|||
return getGeneric<signed char>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> getUint16(const v8::Arguments& args) { |
|||
return getGeneric<unsigned short>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> getInt16(const v8::Arguments& args) { |
|||
return getGeneric<short>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> getUint32(const v8::Arguments& args) { |
|||
return getGeneric<unsigned int>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> getInt32(const v8::Arguments& args) { |
|||
return getGeneric<int>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> getFloat32(const v8::Arguments& args) { |
|||
return getGeneric<float>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> getFloat64(const v8::Arguments& args) { |
|||
return getGeneric<double>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> setUint8(const v8::Arguments& args) { |
|||
return setGeneric<unsigned char>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> setInt8(const v8::Arguments& args) { |
|||
return setGeneric<signed char>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> setUint16(const v8::Arguments& args) { |
|||
return setGeneric<unsigned short>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> setInt16(const v8::Arguments& args) { |
|||
return setGeneric<short>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> setUint32(const v8::Arguments& args) { |
|||
return setGeneric<unsigned int>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> setInt32(const v8::Arguments& args) { |
|||
return setGeneric<int>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> setFloat32(const v8::Arguments& args) { |
|||
return setGeneric<float>(args); |
|||
} |
|||
|
|||
static v8::Handle<v8::Value> setFloat64(const v8::Arguments& args) { |
|||
return setGeneric<double>(args); |
|||
} |
|||
}; |
|||
|
|||
|
|||
} // namespace
|
|||
|
|||
namespace v8_typed_array { |
|||
|
|||
void AttachBindings(v8::Handle<v8::Object> obj) { |
|||
v8::HandleScope scope(node::node_isolate); |
|||
|
|||
obj->Set(v8::String::New("ArrayBuffer"), |
|||
ArrayBuffer::GetTemplate()->GetFunction()); |
|||
obj->Set(v8::String::New("Int8Array"), |
|||
Int8Array::GetTemplate()->GetFunction()); |
|||
obj->Set(v8::String::New("Uint8Array"), |
|||
Uint8Array::GetTemplate()->GetFunction()); |
|||
obj->Set(v8::String::New("Uint8ClampedArray"), |
|||
Uint8ClampedArray::GetTemplate()->GetFunction()); |
|||
obj->Set(v8::String::New("Int16Array"), |
|||
Int16Array::GetTemplate()->GetFunction()); |
|||
obj->Set(v8::String::New("Uint16Array"), |
|||
Uint16Array::GetTemplate()->GetFunction()); |
|||
obj->Set(v8::String::New("Int32Array"), |
|||
Int32Array::GetTemplate()->GetFunction()); |
|||
obj->Set(v8::String::New("Uint32Array"), |
|||
Uint32Array::GetTemplate()->GetFunction()); |
|||
obj->Set(v8::String::New("Float32Array"), |
|||
Float32Array::GetTemplate()->GetFunction()); |
|||
obj->Set(v8::String::New("Float64Array"), |
|||
Float64Array::GetTemplate()->GetFunction()); |
|||
obj->Set(v8::String::New("DataView"), |
|||
DataView::GetTemplate()->GetFunction()); |
|||
} |
|||
|
|||
int SizeOfArrayElementForType(v8::ExternalArrayType type) { |
|||
switch (type) { |
|||
case v8::kExternalByteArray: |
|||
case v8::kExternalUnsignedByteArray: |
|||
case v8::kExternalPixelArray: |
|||
return 1; |
|||
case v8::kExternalShortArray: |
|||
case v8::kExternalUnsignedShortArray: |
|||
return 2; |
|||
case v8::kExternalIntArray: |
|||
case v8::kExternalUnsignedIntArray: |
|||
case v8::kExternalFloatArray: |
|||
return 4; |
|||
case v8::kExternalDoubleArray: |
|||
return 8; |
|||
default: |
|||
return 0; |
|||
} |
|||
} |
|||
|
|||
} // namespace v8_typed_array
|
|||
@ -1,35 +0,0 @@ |
|||
// V8 Typed Array implementation.
|
|||
// (c) Dean McNamee <dean@gmail.com>, 2011.
|
|||
//
|
|||
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|||
// of this software and associated documentation files (the "Software"), to
|
|||
// deal in the Software without restriction, including without limitation the
|
|||
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|||
// sell copies of the Software, and to permit persons to whom the Software is
|
|||
// furnished to do so, subject to the following conditions:
|
|||
//
|
|||
// The above copyright notice and this permission notice shall be included in
|
|||
// all copies or substantial portions of the Software.
|
|||
//
|
|||
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|||
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|||
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|||
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|||
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|||
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|||
// IN THE SOFTWARE.
|
|||
|
|||
#ifndef V8_TYPED_ARRAY_H_ |
|||
#define V8_TYPED_ARRAY_H_ |
|||
|
|||
#include "v8.h" |
|||
|
|||
namespace v8_typed_array { |
|||
|
|||
void AttachBindings(v8::Handle<v8::Object> obj); |
|||
|
|||
int SizeOfArrayElementForType(v8::ExternalArrayType type); |
|||
|
|||
} // namespace v8_typed_array
|
|||
|
|||
#endif // V8_TYPED_ARRAY_H_
|
|||
@ -1,201 +0,0 @@ |
|||
// V8 Typed Array implementation.
|
|||
// (c) Dean McNamee <dean@gmail.com>, 2012.
|
|||
//
|
|||
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|||
// of this software and associated documentation files (the "Software"), to
|
|||
// deal in the Software without restriction, including without limitation the
|
|||
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|||
// sell copies of the Software, and to permit persons to whom the Software is
|
|||
// furnished to do so, subject to the following conditions:
|
|||
//
|
|||
// The above copyright notice and this permission notice shall be included in
|
|||
// all copies or substantial portions of the Software.
|
|||
//
|
|||
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|||
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|||
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|||
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|||
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|||
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|||
// IN THE SOFTWARE.
|
|||
|
|||
#ifndef V8_TYPED_ARRAY_BSWAP_H_ |
|||
#define V8_TYPED_ARRAY_BSWAP_H_ |
|||
|
|||
// Windows will always be little endian (including ARM), so we just need to
|
|||
// worry about gcc.
|
|||
#if defined (__ppc__) || defined (__ppc64__) || defined(__ARMEB__) |
|||
#define V8_TYPED_ARRAY_BIG_ENDIAN 1 |
|||
#else |
|||
#define V8_TYPED_ARRAY_LITTLE_ENDIAN 1 |
|||
#endif |
|||
|
|||
#if defined (_MSC_VER) && (_MSC_VER < 1600) |
|||
typedef unsigned char uint8_t; |
|||
typedef signed char int8_t; |
|||
typedef unsigned __int16 uint16_t; |
|||
typedef signed __int16 int16_t; |
|||
typedef unsigned __int32 uint32_t; |
|||
typedef signed __int32 int32_t; |
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typedef unsigned __int64 uint64_t; |
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typedef signed __int64 int64_t; |
|||
// Definitions to avoid ICU redefinition issue
|
|||
#define U_HAVE_INT8_T 1 |
|||
#define U_HAVE_UINT8_T 1 |
|||
#define U_HAVE_INT16_T 1 |
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#define U_HAVE_UINT16_T 1 |
|||
#define U_HAVE_INT32_T 1 |
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#define U_HAVE_UINT32_T 1 |
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#define U_HAVE_INT64_T 1 |
|||
#define U_HAVE_UINT64_T 1 |
|||
#else |
|||
#include <stdint.h> |
|||
#endif |
|||
|
|||
#if defined (_MSC_VER) |
|||
#define V8_TYPED_ARRAY_BSWAP16 _byteswap_ushort |
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#define V8_TYPED_ARRAY_BSWAP32 _byteswap_ulong |
|||
#define V8_TYPED_ARRAY_BSWAP64 _byteswap_uint64 |
|||
#else |
|||
// On LLVM based compilers we can feature test, but for GCC we unfortunately
|
|||
// have to rely on the version. Additionally __builtin_bswap32/64 were added
|
|||
// in GCC 4.3, but __builtin_bswap16 was not added until GCC 4.8.
|
|||
// We should be able to assume GCC/LLVM here (and can use ULL constants, etc).
|
|||
// Fallback swap macros taken from QEMU bswap.h
|
|||
#ifdef __has_builtin |
|||
#define V8_TYPED_ARRAY_BSWAP_HAS_BUILTIN(x) __has_builtin(x) |
|||
#define V8_TYPED_ARRAY_BSWAP_HAS_BUILTIN16(x) __has_builtin(x) |
|||
#else |
|||
#define V8_TYPED_ARRAY_BSWAP_HAS_BUILTIN(x) (defined(__GNUC__) && \ |
|||
(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) |
|||
#define V8_TYPED_ARRAY_BSWAP_HAS_BUILTIN16(x) (defined(__GNUC__) && \ |
|||
(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))) |
|||
#endif |
|||
|
|||
#if V8_TYPED_ARRAY_BSWAP_HAS_BUILTIN(__builtin_bswap64) |
|||
#define V8_TYPED_ARRAY_BSWAP64 __builtin_bswap64 |
|||
#else |
|||
#define V8_TYPED_ARRAY_BSWAP64(x) \ |
|||
({ \ |
|||
uint64_t __x = (x); \ |
|||
((uint64_t)( \ |
|||
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \ |
|||
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \ |
|||
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \ |
|||
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) << 8) | \ |
|||
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \ |
|||
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \ |
|||
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \ |
|||
(uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \ |
|||
}) |
|||
#endif |
|||
|
|||
#if V8_TYPED_ARRAY_BSWAP_HAS_BUILTIN(__builtin_bswap32) |
|||
#define V8_TYPED_ARRAY_BSWAP32 __builtin_bswap32 |
|||
#else |
|||
#define V8_TYPED_ARRAY_BSWAP32(x) \ |
|||
({ \ |
|||
uint32_t __x = (x); \ |
|||
((uint32_t)( \ |
|||
(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \ |
|||
(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \ |
|||
(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \ |
|||
(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \ |
|||
}) |
|||
#endif |
|||
|
|||
#if V8_TYPED_ARRAY_BSWAP_HAS_BUILTIN16(__builtin_bswap16) |
|||
#define V8_TYPED_ARRAY_BSWAP16 __builtin_bswap16 |
|||
#else |
|||
#define V8_TYPED_ARRAY_BSWAP16(x) \ |
|||
({ \ |
|||
uint16_t __x = (x); \ |
|||
((uint16_t)( \ |
|||
(((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \ |
|||
(((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \ |
|||
}) |
|||
#endif |
|||
#endif |
|||
|
|||
|
|||
namespace v8_typed_array { |
|||
|
|||
template <typename T> |
|||
inline T SwapBytes(T x) { |
|||
typedef char NoSwapBytesForType[sizeof(T) == 0 ? 1 : -1]; |
|||
return 0; |
|||
} |
|||
|
|||
template <> |
|||
inline signed char SwapBytes(signed char x) { return x; } |
|||
template <> |
|||
inline unsigned char SwapBytes(unsigned char x) { return x; } |
|||
template <> |
|||
inline uint16_t SwapBytes(uint16_t x) { return V8_TYPED_ARRAY_BSWAP16(x); } |
|||
template <> |
|||
inline int16_t SwapBytes(int16_t x) { return V8_TYPED_ARRAY_BSWAP16(x); } |
|||
template <> |
|||
inline uint32_t SwapBytes(uint32_t x) { return V8_TYPED_ARRAY_BSWAP32(x); } |
|||
template <> |
|||
inline int32_t SwapBytes(int32_t x) { return V8_TYPED_ARRAY_BSWAP32(x); } |
|||
template <> |
|||
inline uint64_t SwapBytes(uint64_t x) { return V8_TYPED_ARRAY_BSWAP64(x); } |
|||
template <> |
|||
inline int64_t SwapBytes(int64_t x) { return V8_TYPED_ARRAY_BSWAP64(x); } |
|||
|
|||
template <typename T> // General implementation for all non-FP types.
|
|||
inline T LoadAndSwapBytes(void* ptr) { |
|||
T val; |
|||
memcpy(&val, ptr, sizeof(T)); |
|||
return SwapBytes(val); |
|||
} |
|||
|
|||
template <> |
|||
inline float LoadAndSwapBytes<float>(void* ptr) { |
|||
typedef char VerifySizesAreEqual[sizeof(uint32_t) == sizeof(float) ? 1 : -1]; |
|||
uint32_t swappable; |
|||
float val; |
|||
memcpy(&swappable, ptr, sizeof(swappable)); |
|||
swappable = SwapBytes(swappable); |
|||
memcpy(&val, &swappable, sizeof(swappable)); |
|||
return val; |
|||
} |
|||
|
|||
template <> |
|||
inline double LoadAndSwapBytes<double>(void* ptr) { |
|||
typedef char VerifySizesAreEqual[sizeof(uint64_t) == sizeof(double) ? 1 : -1]; |
|||
uint64_t swappable; |
|||
double val; |
|||
memcpy(&swappable, ptr, sizeof(swappable)); |
|||
swappable = SwapBytes(swappable); |
|||
memcpy(&val, &swappable, sizeof(swappable)); |
|||
return val; |
|||
} |
|||
|
|||
template <typename T> // General implementation for all non-FP types.
|
|||
inline void SwapBytesAndStore(void* ptr, T val) { |
|||
val = SwapBytes(val); |
|||
memcpy(ptr, &val, sizeof(T)); |
|||
} |
|||
|
|||
template <> |
|||
inline void SwapBytesAndStore(void* ptr, float val) { |
|||
typedef char VerifySizesAreEqual[sizeof(uint32_t) == sizeof(float) ? 1 : -1]; |
|||
uint32_t swappable; |
|||
memcpy(&swappable, &val, sizeof(swappable)); |
|||
swappable = SwapBytes(swappable); |
|||
memcpy(ptr, &swappable, sizeof(swappable)); |
|||
} |
|||
|
|||
template <> |
|||
inline void SwapBytesAndStore(void* ptr, double val) { |
|||
typedef char VerifySizesAreEqual[sizeof(uint64_t) == sizeof(double) ? 1 : -1]; |
|||
uint64_t swappable; |
|||
memcpy(&swappable, &val, sizeof(swappable)); |
|||
swappable = SwapBytes(swappable); |
|||
memcpy(ptr, &swappable, sizeof(swappable)); |
|||
} |
|||
|
|||
} // namespace v8_typed_array
|
|||
|
|||
#endif // V8_TYPED_ARRAY_BSWAP_H_
|
|||
Loading…
Reference in new issue