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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/runtime/runtime-utils.h" | 5 #include "src/runtime/runtime-utils.h" |
6 | 6 |
7 #include "src/arguments.h" | 7 #include "src/arguments.h" |
8 #include "src/factory.h" | 8 #include "src/factory.h" |
9 #include "src/messages.h" | 9 #include "src/messages.h" |
10 #include "src/objects-inl.h" | 10 #include "src/objects-inl.h" |
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120 CHECK(TryNumberToSize(isolate, *byte_offset_object, &byte_offset)); | 120 CHECK(TryNumberToSize(isolate, *byte_offset_object, &byte_offset)); |
121 CHECK(TryNumberToSize(isolate, *byte_length_object, &byte_length)); | 121 CHECK(TryNumberToSize(isolate, *byte_length_object, &byte_length)); |
122 | 122 |
123 if (maybe_buffer->IsJSArrayBuffer()) { | 123 if (maybe_buffer->IsJSArrayBuffer()) { |
124 Handle<JSArrayBuffer> buffer = Handle<JSArrayBuffer>::cast(maybe_buffer); | 124 Handle<JSArrayBuffer> buffer = Handle<JSArrayBuffer>::cast(maybe_buffer); |
125 size_t array_buffer_byte_length = | 125 size_t array_buffer_byte_length = |
126 NumberToSize(isolate, buffer->byte_length()); | 126 NumberToSize(isolate, buffer->byte_length()); |
127 CHECK(byte_offset <= array_buffer_byte_length); | 127 CHECK(byte_offset <= array_buffer_byte_length); |
128 CHECK(array_buffer_byte_length - byte_offset >= byte_length); | 128 CHECK(array_buffer_byte_length - byte_offset >= byte_length); |
129 } else { | 129 } else { |
130 CHECK(maybe_buffer->IsNull(isolate)); | 130 CHECK(maybe_buffer->IsNull()); |
131 } | 131 } |
132 | 132 |
133 CHECK(byte_length % element_size == 0); | 133 CHECK(byte_length % element_size == 0); |
134 size_t length = byte_length / element_size; | 134 size_t length = byte_length / element_size; |
135 | 135 |
136 if (length > static_cast<unsigned>(Smi::kMaxValue)) { | 136 if (length > static_cast<unsigned>(Smi::kMaxValue)) { |
137 THROW_NEW_ERROR_RETURN_FAILURE( | 137 THROW_NEW_ERROR_RETURN_FAILURE( |
138 isolate, NewRangeError(MessageTemplate::kInvalidTypedArrayLength)); | 138 isolate, NewRangeError(MessageTemplate::kInvalidTypedArrayLength)); |
139 } | 139 } |
140 | 140 |
141 // All checks are done, now we can modify objects. | 141 // All checks are done, now we can modify objects. |
142 | 142 |
143 DCHECK_EQ(v8::ArrayBufferView::kInternalFieldCount, | 143 DCHECK_EQ(v8::ArrayBufferView::kInternalFieldCount, |
144 holder->GetInternalFieldCount()); | 144 holder->GetInternalFieldCount()); |
145 for (int i = 0; i < v8::ArrayBufferView::kInternalFieldCount; i++) { | 145 for (int i = 0; i < v8::ArrayBufferView::kInternalFieldCount; i++) { |
146 holder->SetInternalField(i, Smi::FromInt(0)); | 146 holder->SetInternalField(i, Smi::FromInt(0)); |
147 } | 147 } |
148 Handle<Object> length_obj = isolate->factory()->NewNumberFromSize(length); | 148 Handle<Object> length_obj = isolate->factory()->NewNumberFromSize(length); |
149 holder->set_length(*length_obj); | 149 holder->set_length(*length_obj); |
150 holder->set_byte_offset(*byte_offset_object); | 150 holder->set_byte_offset(*byte_offset_object); |
151 holder->set_byte_length(*byte_length_object); | 151 holder->set_byte_length(*byte_length_object); |
152 | 152 |
153 if (!maybe_buffer->IsNull(isolate)) { | 153 if (!maybe_buffer->IsNull()) { |
154 Handle<JSArrayBuffer> buffer = Handle<JSArrayBuffer>::cast(maybe_buffer); | 154 Handle<JSArrayBuffer> buffer = Handle<JSArrayBuffer>::cast(maybe_buffer); |
155 holder->set_buffer(*buffer); | 155 holder->set_buffer(*buffer); |
156 | 156 |
157 Handle<FixedTypedArrayBase> elements = | 157 Handle<FixedTypedArrayBase> elements = |
158 isolate->factory()->NewFixedTypedArrayWithExternalPointer( | 158 isolate->factory()->NewFixedTypedArrayWithExternalPointer( |
159 static_cast<int>(length), array_type, | 159 static_cast<int>(length), array_type, |
160 static_cast<uint8_t*>(buffer->backing_store()) + byte_offset); | 160 static_cast<uint8_t*>(buffer->backing_store()) + byte_offset); |
161 holder->set_elements(*elements); | 161 holder->set_elements(*elements); |
162 } else { | 162 } else { |
163 Handle<JSArrayBuffer> buffer = isolate->factory()->NewJSArrayBuffer(); | 163 Handle<JSArrayBuffer> buffer = isolate->factory()->NewJSArrayBuffer(); |
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634 DATA_VIEW_SETTER(Uint16, uint16_t) | 634 DATA_VIEW_SETTER(Uint16, uint16_t) |
635 DATA_VIEW_SETTER(Int16, int16_t) | 635 DATA_VIEW_SETTER(Int16, int16_t) |
636 DATA_VIEW_SETTER(Uint32, uint32_t) | 636 DATA_VIEW_SETTER(Uint32, uint32_t) |
637 DATA_VIEW_SETTER(Int32, int32_t) | 637 DATA_VIEW_SETTER(Int32, int32_t) |
638 DATA_VIEW_SETTER(Float32, float) | 638 DATA_VIEW_SETTER(Float32, float) |
639 DATA_VIEW_SETTER(Float64, double) | 639 DATA_VIEW_SETTER(Float64, double) |
640 | 640 |
641 #undef DATA_VIEW_SETTER | 641 #undef DATA_VIEW_SETTER |
642 } // namespace internal | 642 } // namespace internal |
643 } // namespace v8 | 643 } // namespace v8 |
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