| // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "vm/regexp_assembler.h" |
| |
| #include "unicode/uchar.h" |
| |
| #include "platform/unicode.h" |
| |
| #include "vm/flags.h" |
| #include "vm/regexp.h" |
| #include "vm/runtime_entry.h" |
| #include "vm/unibrow-inl.h" |
| |
| namespace dart { |
| |
| void PrintUtf16(uint16_t c) { |
| const char* format = (0x20 <= c && c <= 0x7F) ? "%c" |
| : (c <= 0xff) ? "\\x%02x" |
| : "\\u%04x"; |
| OS::PrintErr(format, c); |
| } |
| |
| uword /*BoolPtr*/ CaseInsensitiveCompareUCS2(uword /*StringPtr*/ str_raw, |
| uword /*SmiPtr*/ lhs_index_raw, |
| uword /*SmiPtr*/ rhs_index_raw, |
| uword /*SmiPtr*/ length_raw) { |
| const String& str = String::Handle(static_cast<StringPtr>(str_raw)); |
| const Smi& lhs_index = Smi::Handle(static_cast<SmiPtr>(lhs_index_raw)); |
| const Smi& rhs_index = Smi::Handle(static_cast<SmiPtr>(rhs_index_raw)); |
| const Smi& length = Smi::Handle(static_cast<SmiPtr>(length_raw)); |
| |
| // TODO(zerny): Optimize as single instance. V8 has this as an |
| // isolate member. |
| unibrow::Mapping<unibrow::Ecma262Canonicalize> canonicalize; |
| |
| for (intptr_t i = 0; i < length.Value(); i++) { |
| int32_t c1 = str.CharAt(lhs_index.Value() + i); |
| int32_t c2 = str.CharAt(rhs_index.Value() + i); |
| if (c1 != c2) { |
| int32_t s1[1] = {c1}; |
| canonicalize.get(c1, '\0', s1); |
| if (s1[0] != c2) { |
| int32_t s2[1] = {c2}; |
| canonicalize.get(c2, '\0', s2); |
| if (s1[0] != s2[0]) { |
| return static_cast<uword>(Bool::False().ptr()); |
| } |
| } |
| } |
| } |
| return static_cast<uword>(Bool::True().ptr()); |
| } |
| |
| uword /*BoolPtr*/ CaseInsensitiveCompareUTF16(uword /*StringPtr*/ str_raw, |
| uword /*SmiPtr*/ lhs_index_raw, |
| uword /*SmiPtr*/ rhs_index_raw, |
| uword /*SmiPtr*/ length_raw) { |
| const String& str = String::Handle(static_cast<StringPtr>(str_raw)); |
| const Smi& lhs_index = Smi::Handle(static_cast<SmiPtr>(lhs_index_raw)); |
| const Smi& rhs_index = Smi::Handle(static_cast<SmiPtr>(rhs_index_raw)); |
| const Smi& length = Smi::Handle(static_cast<SmiPtr>(length_raw)); |
| |
| for (intptr_t i = 0; i < length.Value(); i++) { |
| int32_t c1 = str.CharAt(lhs_index.Value() + i); |
| int32_t c2 = str.CharAt(rhs_index.Value() + i); |
| if (Utf16::IsLeadSurrogate(c1)) { |
| // Non-BMP characters do not have case-equivalents in the BMP. |
| // Both have to be non-BMP for them to be able to match. |
| if (!Utf16::IsLeadSurrogate(c2)) |
| return static_cast<uword>(Bool::False().ptr()); |
| if (i + 1 < length.Value()) { |
| uint16_t c1t = str.CharAt(lhs_index.Value() + i + 1); |
| uint16_t c2t = str.CharAt(rhs_index.Value() + i + 1); |
| if (Utf16::IsTrailSurrogate(c1t) && Utf16::IsTrailSurrogate(c2t)) { |
| c1 = Utf16::Decode(c1, c1t); |
| c2 = Utf16::Decode(c2, c2t); |
| i++; |
| } |
| } |
| } |
| c1 = u_foldCase(c1, U_FOLD_CASE_DEFAULT); |
| c2 = u_foldCase(c2, U_FOLD_CASE_DEFAULT); |
| if (c1 != c2) return static_cast<uword>(Bool::False().ptr()); |
| } |
| return static_cast<uword>(Bool::True().ptr()); |
| } |
| |
| DEFINE_RAW_LEAF_RUNTIME_ENTRY(CaseInsensitiveCompareUCS2, |
| /*argument_count=*/4, |
| /*is_float=*/false, |
| CaseInsensitiveCompareUCS2); |
| |
| DEFINE_RAW_LEAF_RUNTIME_ENTRY(CaseInsensitiveCompareUTF16, |
| /*argument_count=*/4, |
| /*is_float=*/false, |
| CaseInsensitiveCompareUTF16); |
| |
| BlockLabel::BlockLabel() { |
| #if !defined(DART_PRECOMPILED_RUNTIME) |
| if (!FLAG_interpret_irregexp) { |
| // Only needed by the compiled IR backend. |
| block_ = |
| new JoinEntryInstr(-1, -1, CompilerState::Current().GetNextDeoptId()); |
| } |
| #endif |
| } |
| |
| RegExpMacroAssembler::RegExpMacroAssembler(Zone* zone) |
| : slow_safe_compiler_(false), global_mode_(NOT_GLOBAL), zone_(zone) {} |
| |
| RegExpMacroAssembler::~RegExpMacroAssembler() {} |
| |
| void RegExpMacroAssembler::CheckNotInSurrogatePair(intptr_t cp_offset, |
| BlockLabel* on_failure) { |
| BlockLabel ok; |
| // Check that current character is not a trail surrogate. |
| LoadCurrentCharacter(cp_offset, &ok); |
| CheckCharacterNotInRange(Utf16::kTrailSurrogateStart, |
| Utf16::kTrailSurrogateEnd, &ok); |
| // Check that previous character is not a lead surrogate. |
| LoadCurrentCharacter(cp_offset - 1, &ok); |
| CheckCharacterInRange(Utf16::kLeadSurrogateStart, Utf16::kLeadSurrogateEnd, |
| on_failure); |
| BindBlock(&ok); |
| } |
| |
| } // namespace dart |