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Side by Side Diff: src/objects-inl.h

Issue 663313003: Cleanup ConsStringIteratorOp. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 6 years, 2 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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 // Review notes: 5 // Review notes:
6 // 6 //
7 // - The use of macros in these inline functions may seem superfluous 7 // - The use of macros in these inline functions may seem superfluous
8 // but it is absolutely needed to make sure gcc generates optimal 8 // but it is absolutely needed to make sure gcc generates optimal
9 // code. gcc is not happy when attempting to inline too deep. 9 // code. gcc is not happy when attempting to inline too deep.
10 // 10 //
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3686 return GetChars()[index]; 3686 return GetChars()[index];
3687 } 3687 }
3688 3688
3689 3689
3690 const uint16_t* ExternalTwoByteString::ExternalTwoByteStringGetData( 3690 const uint16_t* ExternalTwoByteString::ExternalTwoByteStringGetData(
3691 unsigned start) { 3691 unsigned start) {
3692 return GetChars() + start; 3692 return GetChars() + start;
3693 } 3693 }
3694 3694
3695 3695
3696 int ConsStringIteratorOp::OffsetForDepth(int depth) { 3696 int ConsStringIterator::OffsetForDepth(int depth) { return depth & kDepthMask; }
3697 return depth & kDepthMask;
3698 }
3699 3697
3700 3698
3701 void ConsStringIteratorOp::PushLeft(ConsString* string) { 3699 void ConsStringIterator::PushLeft(ConsString* string) {
3702 frames_[depth_++ & kDepthMask] = string; 3700 frames_[depth_++ & kDepthMask] = string;
3703 } 3701 }
3704 3702
3705 3703
3706 void ConsStringIteratorOp::PushRight(ConsString* string) { 3704 void ConsStringIterator::PushRight(ConsString* string) {
3707 // Inplace update. 3705 // Inplace update.
3708 frames_[(depth_-1) & kDepthMask] = string; 3706 frames_[(depth_-1) & kDepthMask] = string;
3709 } 3707 }
3710 3708
3711 3709
3712 void ConsStringIteratorOp::AdjustMaximumDepth() { 3710 void ConsStringIterator::AdjustMaximumDepth() {
3713 if (depth_ > maximum_depth_) maximum_depth_ = depth_; 3711 if (depth_ > maximum_depth_) maximum_depth_ = depth_;
3714 } 3712 }
3715 3713
3716 3714
3717 void ConsStringIteratorOp::Pop() { 3715 void ConsStringIterator::Pop() {
3718 DCHECK(depth_ > 0); 3716 DCHECK(depth_ > 0);
3719 DCHECK(depth_ <= maximum_depth_); 3717 DCHECK(depth_ <= maximum_depth_);
3720 depth_--; 3718 depth_--;
3721 } 3719 }
3722 3720
3723 3721
3724 uint16_t StringCharacterStream::GetNext() { 3722 uint16_t StringCharacterStream::GetNext() {
3725 DCHECK(buffer8_ != NULL && end_ != NULL); 3723 DCHECK(buffer8_ != NULL && end_ != NULL);
3726 // Advance cursor if needed. 3724 // Advance cursor if needed.
3727 if (buffer8_ == end_) HasMore(); 3725 if (buffer8_ == end_) HasMore();
3728 DCHECK(buffer8_ < end_); 3726 DCHECK(buffer8_ < end_);
3729 return is_one_byte_ ? *buffer8_++ : *buffer16_++; 3727 return is_one_byte_ ? *buffer8_++ : *buffer16_++;
3730 } 3728 }
3731 3729
3732 3730
3733 StringCharacterStream::StringCharacterStream(String* string, 3731 StringCharacterStream::StringCharacterStream(String* string, int offset)
3734 ConsStringIteratorOp* op, 3732 : is_one_byte_(false) {
3735 int offset)
3736 : is_one_byte_(false),
3737 op_(op) {
3738 Reset(string, offset); 3733 Reset(string, offset);
3739 } 3734 }
3740 3735
3741 3736
3742 void StringCharacterStream::Reset(String* string, int offset) { 3737 void StringCharacterStream::Reset(String* string, int offset) {
3743 buffer8_ = NULL; 3738 buffer8_ = NULL;
3744 end_ = NULL; 3739 end_ = NULL;
3745 ConsString* cons_string = String::VisitFlat(this, string, offset); 3740 ConsString* cons_string = String::VisitFlat(this, string, offset);
3746 op_->Reset(cons_string, offset); 3741 iter_.Reset(cons_string, offset);
3747 if (cons_string != NULL) { 3742 if (cons_string != NULL) {
3748 string = op_->Next(&offset); 3743 string = iter_.Next(&offset);
3749 if (string != NULL) String::VisitFlat(this, string, offset); 3744 if (string != NULL) String::VisitFlat(this, string, offset);
3750 } 3745 }
3751 } 3746 }
3752 3747
3753 3748
3754 bool StringCharacterStream::HasMore() { 3749 bool StringCharacterStream::HasMore() {
3755 if (buffer8_ != end_) return true; 3750 if (buffer8_ != end_) return true;
3756 int offset; 3751 int offset;
3757 String* string = op_->Next(&offset); 3752 String* string = iter_.Next(&offset);
3758 DCHECK_EQ(offset, 0); 3753 DCHECK_EQ(offset, 0);
3759 if (string == NULL) return false; 3754 if (string == NULL) return false;
3760 String::VisitFlat(this, string); 3755 String::VisitFlat(this, string);
3761 DCHECK(buffer8_ != end_); 3756 DCHECK(buffer8_ != end_);
3762 return true; 3757 return true;
3763 } 3758 }
3764 3759
3765 3760
3766 void StringCharacterStream::VisitOneByteString( 3761 void StringCharacterStream::VisitOneByteString(
3767 const uint8_t* chars, int length) { 3762 const uint8_t* chars, int length) {
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6623 6618
6624 6619
6625 uint32_t IteratingStringHasher::Hash(String* string, uint32_t seed) { 6620 uint32_t IteratingStringHasher::Hash(String* string, uint32_t seed) {
6626 IteratingStringHasher hasher(string->length(), seed); 6621 IteratingStringHasher hasher(string->length(), seed);
6627 // Nothing to do. 6622 // Nothing to do.
6628 if (hasher.has_trivial_hash()) return hasher.GetHashField(); 6623 if (hasher.has_trivial_hash()) return hasher.GetHashField();
6629 ConsString* cons_string = String::VisitFlat(&hasher, string); 6624 ConsString* cons_string = String::VisitFlat(&hasher, string);
6630 // The string was flat. 6625 // The string was flat.
6631 if (cons_string == NULL) return hasher.GetHashField(); 6626 if (cons_string == NULL) return hasher.GetHashField();
6632 // This is a ConsString, iterate across it. 6627 // This is a ConsString, iterate across it.
6633 ConsStringIteratorOp op(cons_string); 6628 ConsStringIterator iter(cons_string);
6634 int offset; 6629 int offset;
6635 while (NULL != (string = op.Next(&offset))) { 6630 while (NULL != (string = iter.Next(&offset))) {
6636 String::VisitFlat(&hasher, string, offset); 6631 String::VisitFlat(&hasher, string, offset);
6637 } 6632 }
6638 return hasher.GetHashField(); 6633 return hasher.GetHashField();
6639 } 6634 }
6640 6635
6641 6636
6642 void IteratingStringHasher::VisitOneByteString(const uint8_t* chars, 6637 void IteratingStringHasher::VisitOneByteString(const uint8_t* chars,
6643 int length) { 6638 int length) {
6644 AddCharacters(chars, length); 6639 AddCharacters(chars, length);
6645 } 6640 }
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7283 #undef READ_SHORT_FIELD 7278 #undef READ_SHORT_FIELD
7284 #undef WRITE_SHORT_FIELD 7279 #undef WRITE_SHORT_FIELD
7285 #undef READ_BYTE_FIELD 7280 #undef READ_BYTE_FIELD
7286 #undef WRITE_BYTE_FIELD 7281 #undef WRITE_BYTE_FIELD
7287 #undef NOBARRIER_READ_BYTE_FIELD 7282 #undef NOBARRIER_READ_BYTE_FIELD
7288 #undef NOBARRIER_WRITE_BYTE_FIELD 7283 #undef NOBARRIER_WRITE_BYTE_FIELD
7289 7284
7290 } } // namespace v8::internal 7285 } } // namespace v8::internal
7291 7286
7292 #endif // V8_OBJECTS_INL_H_ 7287 #endif // V8_OBJECTS_INL_H_
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