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| 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 |
| 5 #include "vm/bootstrap_natives.h" | 5 #include "vm/bootstrap_natives.h" |
| 6 | 6 |
| 7 #include "include/dart_api.h" | 7 #include "include/dart_api.h" |
| 8 #include "vm/exceptions.h" | 8 #include "vm/exceptions.h" |
| 9 #include "vm/dart_api_impl.h" | 9 #include "vm/dart_api_impl.h" |
| 10 #include "vm/isolate.h" | 10 #include "vm/isolate.h" |
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| 101 } | 101 } |
| 102 | 102 |
| 103 | 103 |
| 104 | 104 |
| 105 // Return the bitwise-or of all characters in the slice from start to end. | 105 // Return the bitwise-or of all characters in the slice from start to end. |
| 106 static uint16_t CharacterLimit(const String& string, | 106 static uint16_t CharacterLimit(const String& string, |
| 107 intptr_t start, intptr_t end) { | 107 intptr_t start, intptr_t end) { |
| 108 ASSERT(string.IsTwoByteString() || string.IsExternalTwoByteString()); | 108 ASSERT(string.IsTwoByteString() || string.IsExternalTwoByteString()); |
| 109 // Maybe do loop unrolling, and handle two uint16_t in a single uint32_t | 109 // Maybe do loop unrolling, and handle two uint16_t in a single uint32_t |
| 110 // operation. | 110 // operation. |
| 111 NoGCScope no_gc; | 111 NoSafepointScope no_safepoint; |
| 112 uint16_t result = 0; | 112 uint16_t result = 0; |
| 113 if (string.IsTwoByteString()) { | 113 if (string.IsTwoByteString()) { |
| 114 for (intptr_t i = start; i < end; i++) { | 114 for (intptr_t i = start; i < end; i++) { |
| 115 result |= TwoByteString::CharAt(string, i); | 115 result |= TwoByteString::CharAt(string, i); |
| 116 } | 116 } |
| 117 } else { | 117 } else { |
| 118 for (intptr_t i = start; i < end; i++) { | 118 for (intptr_t i = start; i < end; i++) { |
| 119 result |= ExternalTwoByteString::CharAt(string, i); | 119 result |= ExternalTwoByteString::CharAt(string, i); |
| 120 } | 120 } |
| 121 } | 121 } |
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| 599 GET_NON_NULL_NATIVE_ARGUMENT(Smi, length, arguments->NativeArgAt(1)); | 599 GET_NON_NULL_NATIVE_ARGUMENT(Smi, length, arguments->NativeArgAt(1)); |
| 600 GET_NON_NULL_NATIVE_ARGUMENT(Bool, isLatin1, arguments->NativeArgAt(2)); | 600 GET_NON_NULL_NATIVE_ARGUMENT(Bool, isLatin1, arguments->NativeArgAt(2)); |
| 601 intptr_t array_length = codeUnits.Length(); | 601 intptr_t array_length = codeUnits.Length(); |
| 602 intptr_t length_value = length.Value(); | 602 intptr_t length_value = length.Value(); |
| 603 if (length_value < 0 || length_value > array_length) { | 603 if (length_value < 0 || length_value > array_length) { |
| 604 Exceptions::ThrowRangeError("length", length, 0, array_length + 1); | 604 Exceptions::ThrowRangeError("length", length, 0, array_length + 1); |
| 605 } | 605 } |
| 606 const String& result = isLatin1.value() | 606 const String& result = isLatin1.value() |
| 607 ? String::Handle(OneByteString::New(length_value, Heap::kNew)) | 607 ? String::Handle(OneByteString::New(length_value, Heap::kNew)) |
| 608 : String::Handle(TwoByteString::New(length_value, Heap::kNew)); | 608 : String::Handle(TwoByteString::New(length_value, Heap::kNew)); |
| 609 NoGCScope no_gc; | 609 NoSafepointScope no_safepoint; |
| 610 | 610 |
| 611 uint16_t* data_position = reinterpret_cast<uint16_t*>(codeUnits.DataAddr(0)); | 611 uint16_t* data_position = reinterpret_cast<uint16_t*>(codeUnits.DataAddr(0)); |
| 612 String::Copy(result, 0, data_position, length_value); | 612 String::Copy(result, 0, data_position, length_value); |
| 613 return result.raw(); | 613 return result.raw(); |
| 614 } | 614 } |
| 615 | 615 |
| 616 } // namespace dart | 616 } // namespace dart |
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