Ryan Macnak
e443b89f23
Includes support for modifier spans and duplicate named capture groups. Drops the flow graph implementation to ease maintenance. TEST=corelib/regexp Bug: https://github.com/dart-lang/sdk/issues/56573 Bug: https://github.com/dart-lang/sdk/issues/61337 Bug: https://github.com/dart-lang/sdk/issues/62349 Bug: https://github.com/dart-lang/sdk/issues/62708 Change-Id: I05640ba945a4fa5476e7ad463738f4f39d842c14 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/480121 Reviewed-by: Lasse Nielsen <lrn@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
72 lines
2.0 KiB
C++
72 lines
2.0 KiB
C++
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_REGEXP_UNIBROW_H_
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#define RUNTIME_VM_REGEXP_UNIBROW_H_
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#include <sys/types.h>
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#include "vm/globals.h"
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/**
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* \file
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* Definitions and convenience functions for working with unicode.
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*/
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namespace unibrow {
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using uchar = unsigned int;
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/**
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* The max length of the result of converting the case of a single
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* character.
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*/
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const int kMaxMappingSize = 4;
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// A cache used in case conversion. It caches the value for characters
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// that either have no mapping or map to a single character independent
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// of context. Characters that map to more than one character or that
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// map differently depending on context are always looked up.
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template <class T, int size = 256>
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class Mapping {
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public:
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inline Mapping() = default;
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inline int get(uchar c, uchar n, uchar* result);
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private:
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friend class Test;
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int CalculateValue(uchar c, uchar n, uchar* result);
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struct CacheEntry {
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inline CacheEntry() : code_point_(kNoChar), offset_(0) {}
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inline CacheEntry(uchar code_point, signed offset)
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: code_point_(code_point), offset_(offset) {}
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uchar code_point_;
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signed offset_;
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static const int kNoChar = (1 << 21) - 1;
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};
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static const int kSize = size;
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static const int kMask = kSize - 1;
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CacheEntry entries_[kSize];
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};
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struct Letter {
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static bool Is(uchar c);
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};
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struct Ecma262Canonicalize {
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static const int kMaxWidth = 1;
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static int Convert(uchar c, uchar n, uchar* result, bool* allow_caching_ptr);
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};
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struct Ecma262UnCanonicalize {
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static const int kMaxWidth = 4;
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static int Convert(uchar c, uchar n, uchar* result, bool* allow_caching_ptr);
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};
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struct CanonicalizationRange {
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static const int kMaxWidth = 1;
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static int Convert(uchar c, uchar n, uchar* result, bool* allow_caching_ptr);
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};
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} // namespace unibrow
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#endif // RUNTIME_VM_REGEXP_UNIBROW_H_
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