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// 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().raw());
}
}
}
}
return static_cast<uword>(Bool::True().raw());
}
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().raw());
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().raw());
}
return static_cast<uword>(Bool::True().raw());
}
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
CaseInsensitiveCompareUCS2,
4,
false /* is_float */,
reinterpret_cast<RuntimeFunction>(&CaseInsensitiveCompareUCS2));
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
CaseInsensitiveCompareUTF16,
4,
false /* is_float */,
reinterpret_cast<RuntimeFunction>(&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