13ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// Copyright 2011 the V8 project authors. All rights reserved. 2b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Use of this source code is governed by a BSD-style license that can be 3b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// found in the LICENSE file. 4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifndef V8_UNICODE_H_ 6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#define V8_UNICODE_H_ 7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#include <sys/types.h> 9b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/globals.h" 10958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier#include "src/utils.h" 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block/** 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block * \file 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block * Definitions and convenience functions for working with unicode. 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block */ 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace unibrow { 17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocktypedef unsigned int uchar; 19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocktypedef unsigned char byte; 20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block/** 22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block * The max length of the result of converting the case of a single 23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block * character. 24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block */ 253ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochconst int kMaxMappingSize = 4; 26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocktemplate <class T, int size = 256> 28a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockclass Predicate { 29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block public: 30a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline Predicate() { } 31a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline bool get(uchar c); 32958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 33a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block private: 34a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block friend class Test; 35a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool CalculateValue(uchar c); 36958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class CacheEntry { 37958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier public: 38958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier inline CacheEntry() 39958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier : bit_field_(CodePointField::encode(0) | ValueField::encode(0)) {} 40a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline CacheEntry(uchar code_point, bool value) 41958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier : bit_field_(CodePointField::encode(code_point) | 42958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier ValueField::encode(value)) {} 43958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 44958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier uchar code_point() const { return CodePointField::decode(bit_field_); } 45958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier bool value() const { return ValueField::decode(bit_field_); } 46958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 47958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier private: 48958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class CodePointField : public v8::internal::BitField<uchar, 0, 21> {}; 49958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class ValueField : public v8::internal::BitField<bool, 21, 1> {}; 50958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 51958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier uint32_t bit_field_; 52a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block }; 53a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kSize = size; 54a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kMask = kSize - 1; 55a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CacheEntry entries_[kSize]; 56a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 57a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 58958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 59a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A cache used in case conversion. It caches the value for characters 60a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// that either have no mapping or map to a single character independent 61a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// of context. Characters that map to more than one character or that 62a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// map differently depending on context are always looked up. 63a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocktemplate <class T, int size = 256> 64a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockclass Mapping { 65a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block public: 66a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline Mapping() { } 67a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline int get(uchar c, uchar n, uchar* result); 68a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block private: 69a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block friend class Test; 70a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int CalculateValue(uchar c, uchar n, uchar* result); 71a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block struct CacheEntry { 72a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline CacheEntry() : code_point_(kNoChar), offset_(0) { } 73a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline CacheEntry(uchar code_point, signed offset) 74a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block : code_point_(code_point), 75a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block offset_(offset) { } 76a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar code_point_; 77a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block signed offset_; 78a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kNoChar = (1 << 21) - 1; 79a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block }; 80a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kSize = size; 81a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kMask = kSize - 1; 82a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CacheEntry entries_[kSize]; 83a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 84a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 85958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 86a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockclass UnicodeData { 87a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block private: 88a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block friend class Test; 89a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static int GetByteCount(); 9044f0eee88ff00398ff7f715fab053374d808c90dSteve Block static const uchar kMaxCodePoint; 91a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 92a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 93958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 943ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochclass Utf16 { 953ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch public: 96b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline bool IsSurrogatePair(int lead, int trail) { 97b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return IsLeadSurrogate(lead) && IsTrailSurrogate(trail); 98b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 993ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static inline bool IsLeadSurrogate(int code) { 1003ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch if (code == kNoPreviousCharacter) return false; 1013ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch return (code & 0xfc00) == 0xd800; 1023ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 1033ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static inline bool IsTrailSurrogate(int code) { 1043ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch if (code == kNoPreviousCharacter) return false; 1053ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch return (code & 0xfc00) == 0xdc00; 1063ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 1073ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 1083ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static inline int CombineSurrogatePair(uchar lead, uchar trail) { 1093ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch return 0x10000 + ((lead & 0x3ff) << 10) + (trail & 0x3ff); 1103ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 1113ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static const int kNoPreviousCharacter = -1; 1123ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static const uchar kMaxNonSurrogateCharCode = 0xffff; 1133ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Encoding a single UTF-16 code unit will produce 1, 2 or 3 bytes 1143ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // of UTF-8 data. The special case where the unit is a surrogate 1153ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // trail produces 1 byte net, because the encoding of the pair is 1163ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // 4 bytes and the 3 bytes that were used to encode the lead surrogate 1173ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // can be reclaimed. 1183ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static const int kMaxExtraUtf8BytesForOneUtf16CodeUnit = 3; 1193ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // One UTF-16 surrogate is endoded (illegally) as 3 UTF-8 bytes. 1203ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // The illegality stems from the surrogate not being part of a pair. 1213ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static const int kUtf8BytesToCodeASurrogate = 3; 122b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline uint16_t LeadSurrogate(uint32_t char_code) { 1233ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch return 0xd800 + (((char_code - 0x10000) >> 10) & 0x3ff); 1243ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 125b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline uint16_t TrailSurrogate(uint32_t char_code) { 1263ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch return 0xdc00 + (char_code & 0x3ff); 1273ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 1283ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch}; 1293ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 1303ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 131a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockclass Utf8 { 132a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block public: 1333ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static inline uchar Length(uchar chr, int previous); 134b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline unsigned EncodeOneByte(char* out, uint8_t c); 135b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline unsigned Encode(char* out, 136b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uchar c, 137b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int previous, 138b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool replace_invalid = false); 139014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch static uchar CalculateValue(const byte* str, size_t length, size_t* cursor); 140b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 141b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The unicode replacement character, used to signal invalid unicode 142b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // sequences (e.g. an orphan surrogate) when converting to a UTF-8 encoding. 143a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const uchar kBadChar = 0xFFFD; 144f3b273f5e6ffd2f6ba1c18a27a17db41dfb113c3Ben Murdoch static const uchar kBufferEmpty = 0x0; 145f3b273f5e6ffd2f6ba1c18a27a17db41dfb113c3Ben Murdoch static const uchar kIncomplete = 0xFFFFFFFC; // any non-valid code point. 146a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const unsigned kMaxEncodedSize = 4; 147a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const unsigned kMaxOneByteChar = 0x7f; 148a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const unsigned kMaxTwoByteChar = 0x7ff; 149a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const unsigned kMaxThreeByteChar = 0xffff; 150a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const unsigned kMaxFourByteChar = 0x1fffff; 151a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1523ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // A single surrogate is coded as a 3 byte UTF-8 sequence, but two together 1533ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // that match are coded as a 4 byte UTF-8 sequence. 1543ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static const unsigned kBytesSavedByCombiningSurrogates = 2; 1553ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static const unsigned kSizeOfUnmatchedSurrogate = 3; 156b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The maximum size a single UTF-16 code unit may take up when encoded as 157b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // UTF-8. 158b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const unsigned kMax16BitCodeUnitSize = 3; 159014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch static inline uchar ValueOf(const byte* str, size_t length, size_t* cursor); 160bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch 161f3b273f5e6ffd2f6ba1c18a27a17db41dfb113c3Ben Murdoch typedef uint32_t Utf8IncrementalBuffer; 162f3b273f5e6ffd2f6ba1c18a27a17db41dfb113c3Ben Murdoch static uchar ValueOfIncremental(byte next_byte, 163f3b273f5e6ffd2f6ba1c18a27a17db41dfb113c3Ben Murdoch Utf8IncrementalBuffer* buffer); 164f3b273f5e6ffd2f6ba1c18a27a17db41dfb113c3Ben Murdoch static uchar ValueOfIncrementalFinish(Utf8IncrementalBuffer* buffer); 165f3b273f5e6ffd2f6ba1c18a27a17db41dfb113c3Ben Murdoch 166bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch // Excludes non-characters from the set of valid code points. 167bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch static inline bool IsValidCharacter(uchar c); 168bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch 169bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch static bool Validate(const byte* str, size_t length); 170a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 171a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 172a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockstruct Uppercase { 173a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static bool Is(uchar c); 174a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 175a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockstruct Lowercase { 176a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static bool Is(uchar c); 177a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 178a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockstruct Letter { 179a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static bool Is(uchar c); 180a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 181c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdochstruct V8_EXPORT_PRIVATE ID_Start { 182a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static bool Is(uchar c); 183a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 184c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdochstruct V8_EXPORT_PRIVATE ID_Continue { 185a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static bool Is(uchar c); 186a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 187c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdochstruct V8_EXPORT_PRIVATE WhiteSpace { 188a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static bool Is(uchar c); 189a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 190c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdochstruct V8_EXPORT_PRIVATE LineTerminator { 191a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static bool Is(uchar c); 192a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 193a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockstruct ToLowercase { 194a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kMaxWidth = 3; 195b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const bool kIsToLower = true; 196a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static int Convert(uchar c, 197a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar n, 198a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar* result, 199a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool* allow_caching_ptr); 200a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 201a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockstruct ToUppercase { 202a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kMaxWidth = 3; 203b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const bool kIsToLower = false; 204a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static int Convert(uchar c, 205a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar n, 206a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar* result, 207a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool* allow_caching_ptr); 208a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 209a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockstruct Ecma262Canonicalize { 210a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kMaxWidth = 1; 211a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static int Convert(uchar c, 212a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar n, 213a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar* result, 214a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool* allow_caching_ptr); 215a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 216a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockstruct Ecma262UnCanonicalize { 217a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kMaxWidth = 4; 218a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static int Convert(uchar c, 219a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar n, 220a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar* result, 221a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool* allow_caching_ptr); 222a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 223a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockstruct CanonicalizationRange { 224a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kMaxWidth = 1; 225a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static int Convert(uchar c, 226a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar n, 227a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uchar* result, 228a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool* allow_caching_ptr); 229a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 230a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 231a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} // namespace unibrow 232a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 233a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif // V8_UNICODE_H_ 234