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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 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 #ifndef V8_OBJECTS_H_ | 5 #ifndef V8_OBJECTS_H_ |
6 #define V8_OBJECTS_H_ | 6 #define V8_OBJECTS_H_ |
7 | 7 |
8 #include <iosfwd> | 8 #include <iosfwd> |
9 | 9 |
10 #include "src/assert-scope.h" | 10 #include "src/assert-scope.h" |
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8632 }; | 8632 }; |
8633 | 8633 |
8634 // Representation of the flat content of a String. | 8634 // Representation of the flat content of a String. |
8635 // A non-flat string doesn't have flat content. | 8635 // A non-flat string doesn't have flat content. |
8636 // A flat string has content that's encoded as a sequence of either | 8636 // A flat string has content that's encoded as a sequence of either |
8637 // one-byte chars or two-byte UC16. | 8637 // one-byte chars or two-byte UC16. |
8638 // Returned by String::GetFlatContent(). | 8638 // Returned by String::GetFlatContent(). |
8639 class FlatContent { | 8639 class FlatContent { |
8640 public: | 8640 public: |
8641 // Returns true if the string is flat and this structure contains content. | 8641 // Returns true if the string is flat and this structure contains content. |
8642 bool IsFlat() { return state_ != NON_FLAT; } | 8642 bool IsFlat() const { return state_ != NON_FLAT; } |
8643 // Returns true if the structure contains one-byte content. | 8643 // Returns true if the structure contains one-byte content. |
8644 bool IsOneByte() { return state_ == ONE_BYTE; } | 8644 bool IsOneByte() const { return state_ == ONE_BYTE; } |
8645 // Returns true if the structure contains two-byte content. | 8645 // Returns true if the structure contains two-byte content. |
8646 bool IsTwoByte() { return state_ == TWO_BYTE; } | 8646 bool IsTwoByte() const { return state_ == TWO_BYTE; } |
8647 | 8647 |
8648 // Return the one byte content of the string. Only use if IsOneByte() | 8648 // Return the one byte content of the string. Only use if IsOneByte() |
8649 // returns true. | 8649 // returns true. |
8650 Vector<const uint8_t> ToOneByteVector() { | 8650 Vector<const uint8_t> ToOneByteVector() const { |
8651 DCHECK_EQ(ONE_BYTE, state_); | 8651 DCHECK_EQ(ONE_BYTE, state_); |
8652 return Vector<const uint8_t>(onebyte_start, length_); | 8652 return Vector<const uint8_t>(onebyte_start, length_); |
8653 } | 8653 } |
8654 // Return the two-byte content of the string. Only use if IsTwoByte() | 8654 // Return the two-byte content of the string. Only use if IsTwoByte() |
8655 // returns true. | 8655 // returns true. |
8656 Vector<const uc16> ToUC16Vector() { | 8656 Vector<const uc16> ToUC16Vector() const { |
8657 DCHECK_EQ(TWO_BYTE, state_); | 8657 DCHECK_EQ(TWO_BYTE, state_); |
8658 return Vector<const uc16>(twobyte_start, length_); | 8658 return Vector<const uc16>(twobyte_start, length_); |
8659 } | 8659 } |
8660 | 8660 |
8661 uc16 Get(int i) { | 8661 uc16 Get(int i) const { |
8662 DCHECK(i < length_); | 8662 DCHECK(i < length_); |
8663 DCHECK(state_ != NON_FLAT); | 8663 DCHECK(state_ != NON_FLAT); |
8664 if (state_ == ONE_BYTE) return onebyte_start[i]; | 8664 if (state_ == ONE_BYTE) return onebyte_start[i]; |
8665 return twobyte_start[i]; | 8665 return twobyte_start[i]; |
8666 } | 8666 } |
8667 | 8667 |
8668 bool UsesSameString(const FlatContent& other) const { | 8668 bool UsesSameString(const FlatContent& other) const { |
8669 return onebyte_start == other.onebyte_start; | 8669 return onebyte_start == other.onebyte_start; |
8670 } | 8670 } |
8671 | 8671 |
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10727 } | 10727 } |
10728 return value; | 10728 return value; |
10729 } | 10729 } |
10730 }; | 10730 }; |
10731 | 10731 |
10732 | 10732 |
10733 } // NOLINT, false-positive due to second-order macros. | 10733 } // NOLINT, false-positive due to second-order macros. |
10734 } // NOLINT, false-positive due to second-order macros. | 10734 } // NOLINT, false-positive due to second-order macros. |
10735 | 10735 |
10736 #endif // V8_OBJECTS_H_ | 10736 #endif // V8_OBJECTS_H_ |
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