AuroraMiddleware/v8
1
0
Fork 0
Code Issues 2 Pull Requests Releases Wiki Activity

* Reapply revisions 1383, 1384, 1391, 1398, 1401, 1402,

Browse Source 
1418, and 1419 from bleeding_edge, reverted in 1429.
* Fix of $1 accessor on sliced strings.
* Fix of lastParen method when last parenthesis did not match.
Review URL: http://codereview.chromium.org/43075

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1491 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
erik.corry@gmail.com 2009-03-11 14:00:55 +00:00
parent 3c41aab15d
commit 912c8eb03a
16 changed files with 823 additions and 440 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
src/factory.cc
View File

@ -851,12 +851,13 @@ Handle<Map> Factory::ObjectLiteralMapFromCache(Handle<Context> context,
}
void Factory::SetRegExpData(Handle<JSRegExp> regexp,
JSRegExp::Type type,
Handle<String> source,
JSRegExp::Flags flags,
Handle<Object> data) {
Handle<FixedArray> store = NewFixedArray(JSRegExp::kDataSize);
void Factory::SetRegExpAtomData(Handle<JSRegExp> regexp,
JSRegExp::Type type,
Handle<String> source,
JSRegExp::Flags flags,
Handle<Object> data) {
Handle<FixedArray> store = NewFixedArray(JSRegExp::kAtomDataSize);
store->set(JSRegExp::kTagIndex, Smi::FromInt(type));
store->set(JSRegExp::kSourceIndex, *source);
store->set(JSRegExp::kFlagsIndex, Smi::FromInt(flags.value()));
@ -864,6 +865,25 @@ void Factory::SetRegExpData(Handle<JSRegExp> regexp,
regexp->set_data(*store);
}
void Factory::SetRegExpIrregexpData(Handle<JSRegExp> regexp,
JSRegExp::Type type,
Handle<String> source,
JSRegExp::Flags flags,
int capture_count) {
Handle<FixedArray> store = NewFixedArray(JSRegExp::kIrregexpDataSize);
store->set(JSRegExp::kTagIndex, Smi::FromInt(type));
store->set(JSRegExp::kSourceIndex, *source);
store->set(JSRegExp::kFlagsIndex, Smi::FromInt(flags.value()));
store->set(JSRegExp::kIrregexpASCIICodeIndex, Heap::the_hole_value());
store->set(JSRegExp::kIrregexpUC16CodeIndex, Heap::the_hole_value());
store->set(JSRegExp::kIrregexpMaxRegisterCountIndex, Smi::FromInt(0));
store->set(JSRegExp::kIrregexpCaptureCountIndex,
Smi::FromInt(capture_count));
regexp->set_data(*store);
}
void Factory::ConfigureInstance(Handle<FunctionTemplateInfo> desc,
Handle<JSObject> instance,

20
src/factory.h
View File

@ -317,12 +317,20 @@ class Factory : public AllStatic {
Handle<FixedArray> keys);
// Creates a new FixedArray that holds the data associated with the
// regexp and stores it in the regexp.
static void SetRegExpData(Handle<JSRegExp> regexp,
JSRegExp::Type type,
Handle<String> source,
JSRegExp::Flags flags,
Handle<Object> data);
// atom regexp and stores it in the regexp.
static void SetRegExpAtomData(Handle<JSRegExp> regexp,
JSRegExp::Type type,
Handle<String> source,
JSRegExp::Flags flags,
Handle<Object> match_pattern);
// Creates a new FixedArray that holds the data associated with the
// irregexp regexp and stores it in the regexp.
static void SetRegExpIrregexpData(Handle<JSRegExp> regexp,
JSRegExp::Type type,
Handle<String> source,
JSRegExp::Flags flags,
int capture_count);
private:
static Handle<JSFunction> NewFunctionHelper(Handle<String> name,

593
src/jsregexp.cc
View File

@ -213,55 +213,54 @@ Handle<Object> RegExpImpl::Compile(Handle<JSRegExp> re,
Handle<Object> result;
if (in_cache) {
re->set_data(*cached);
result = re;
} else {
FlattenString(pattern);
ZoneScope zone_scope(DELETE_ON_EXIT);
RegExpCompileData parse_result;
FlatStringReader reader(pattern);
if (!ParseRegExp(&reader, flags.is_multiline(), &parse_result)) {
// Throw an exception if we fail to parse the pattern.
ThrowRegExpException(re,
pattern,
parse_result.error,
"malformed_regexp");
return Handle<Object>::null();
}
if (parse_result.simple && !flags.is_ignore_case()) {
// Parse-tree is a single atom that is equal to the pattern.
result = AtomCompile(re, pattern, flags, pattern);
} else if (parse_result.tree->IsAtom() &&
!flags.is_ignore_case() &&
parse_result.capture_count == 0) {
RegExpAtom* atom = parse_result.tree->AsAtom();
Vector<const uc16> atom_pattern = atom->data();
Handle<String> atom_string = Factory::NewStringFromTwoByte(atom_pattern);
result = AtomCompile(re, pattern, flags, atom_string);
} else {
result = IrregexpPrepare(re, pattern, flags);
}
Object* data = re->data();
if (data->IsFixedArray()) {
// If compilation succeeded then the data is set on the regexp
// and we can store it in the cache.
Handle<FixedArray> data(FixedArray::cast(re->data()));
CompilationCache::PutRegExp(pattern, flags, data);
}
return re;
}
FlattenString(pattern);
ZoneScope zone_scope(DELETE_ON_EXIT);
RegExpCompileData parse_result;
FlatStringReader reader(pattern);
if (!ParseRegExp(&reader, flags.is_multiline(), &parse_result)) {
// Throw an exception if we fail to parse the pattern.
ThrowRegExpException(re,
pattern,
parse_result.error,
"malformed_regexp");
return Handle<Object>::null();
}
return result;
if (parse_result.simple && !flags.is_ignore_case()) {
// Parse-tree is a single atom that is equal to the pattern.
AtomCompile(re, pattern, flags, pattern);
} else if (parse_result.tree->IsAtom() &&
!flags.is_ignore_case() &&
parse_result.capture_count == 0) {
RegExpAtom* atom = parse_result.tree->AsAtom();
Vector<const uc16> atom_pattern = atom->data();
Handle<String> atom_string = Factory::NewStringFromTwoByte(atom_pattern);
AtomCompile(re, pattern, flags, atom_string);
} else {
IrregexpPrepare(re, pattern, flags, parse_result.capture_count);
}
ASSERT(re->data()->IsFixedArray());
// Compilation succeeded so the data is set on the regexp
// and we can store it in the cache.
Handle<FixedArray> data(FixedArray::cast(re->data()));
CompilationCache::PutRegExp(pattern, flags, data);
return re;
}
Handle<Object> RegExpImpl::Exec(Handle<JSRegExp> regexp,
Handle<String> subject,
Handle<Object> index) {
int index,
Handle<JSArray> last_match_info) {
switch (regexp->TypeTag()) {
case JSRegExp::ATOM:
return AtomExec(regexp, subject, index);
return AtomExec(regexp, subject, index, last_match_info);
case JSRegExp::IRREGEXP: {
Handle<Object> result = IrregexpExec(regexp, subject, index);
Handle<Object> result =
IrregexpExec(regexp, subject, index, last_match_info);
ASSERT(!result.is_null() || Top::has_pending_exception());
return result;
}
@ -273,12 +272,14 @@ Handle<Object> RegExpImpl::Exec(Handle<JSRegExp> regexp,
Handle<Object> RegExpImpl::ExecGlobal(Handle<JSRegExp> regexp,
Handle<String> subject) {
Handle<String> subject,
Handle<JSArray> last_match_info) {
switch (regexp->TypeTag()) {
case JSRegExp::ATOM:
return AtomExecGlobal(regexp, subject);
return AtomExecGlobal(regexp, subject, last_match_info);
case JSRegExp::IRREGEXP: {
Handle<Object> result = IrregexpExecGlobal(regexp, subject);
Handle<Object> result =
IrregexpExecGlobal(regexp, subject, last_match_info);
ASSERT(!result.is_null() || Top::has_pending_exception());
return result;
}
@ -292,60 +293,95 @@ Handle<Object> RegExpImpl::ExecGlobal(Handle<JSRegExp> regexp,
// RegExp Atom implementation: Simple string search using indexOf.
Handle<Object> RegExpImpl::AtomCompile(Handle<JSRegExp> re,
Handle<String> pattern,
JSRegExp::Flags flags,
Handle<String> match_pattern) {
Factory::SetRegExpData(re, JSRegExp::ATOM, pattern, flags, match_pattern);
return re;
void RegExpImpl::AtomCompile(Handle<JSRegExp> re,
Handle<String> pattern,
JSRegExp::Flags flags,
Handle<String> match_pattern) {
Factory::SetRegExpAtomData(re,
JSRegExp::ATOM,
pattern,
flags,
match_pattern);
}
static void SetAtomLastCapture(FixedArray* array,
String* subject,
int from,
int to) {
NoHandleAllocation no_handles;
RegExpImpl::SetLastCaptureCount(array, 2);
RegExpImpl::SetLastSubject(array, subject);
RegExpImpl::SetLastInput(array, subject);
RegExpImpl::SetCapture(array, 0, from);
RegExpImpl::SetCapture(array, 1, to);
}
Handle<Object> RegExpImpl::AtomExec(Handle<JSRegExp> re,
Handle<String> subject,
Handle<Object> index) {
int index,
Handle<JSArray> last_match_info) {
Handle<String> needle(String::cast(re->DataAt(JSRegExp::kAtomPatternIndex)));
uint32_t start_index;
if (!Array::IndexFromObject(*index, &start_index)) {
return Handle<Smi>(Smi::FromInt(-1));
}
uint32_t start_index = index;
int value = Runtime::StringMatch(subject, needle, start_index);
if (value == -1) return Factory::null_value();
ASSERT(last_match_info->HasFastElements());
Handle<FixedArray> array = Factory::NewFixedArray(2);
array->set(0, Smi::FromInt(value));
array->set(1, Smi::FromInt(value + needle->length()));
return Factory::NewJSArrayWithElements(array);
{
NoHandleAllocation no_handles;
FixedArray* array = last_match_info->elements();
SetAtomLastCapture(array, *subject, value, value + needle->length());
}
return last_match_info;
}
Handle<Object> RegExpImpl::AtomExecGlobal(Handle<JSRegExp> re,
Handle<String> subject) {
Handle<String> subject,
Handle<JSArray> last_match_info) {
Handle<String> needle(String::cast(re->DataAt(JSRegExp::kAtomPatternIndex)));
ASSERT(last_match_info->HasFastElements());
Handle<JSArray> result = Factory::NewJSArray(1);
int index = 0;
int match_count = 0;
int subject_length = subject->length();
int needle_length = needle->length();
int last_value = -1;
while (true) {
HandleScope scope;
int value = -1;
if (index + needle_length <= subject_length) {
value = Runtime::StringMatch(subject, needle, index);
}
if (value == -1) break;
HandleScope scope;
if (value == -1) {
if (last_value != -1) {
Handle<FixedArray> array(last_match_info->elements());
SetAtomLastCapture(*array,
*subject,
last_value,
last_value + needle->length());
}
break;
}
int end = value + needle_length;
Handle<FixedArray> array = Factory::NewFixedArray(2);
array->set(0, Smi::FromInt(value));
array->set(1, Smi::FromInt(end));
// Create an array that looks like the static last_match_info array
// that is attached to the global RegExp object. We will be returning
// an array of these.
Handle<FixedArray> array = Factory::NewFixedArray(kFirstCapture + 2);
SetCapture(*array, 0, value);
SetCapture(*array, 1, end);
SetLastCaptureCount(*array, 2);
Handle<JSArray> pair = Factory::NewJSArrayWithElements(array);
SetElement(result, match_count, pair);
match_count++;
index = end;
if (needle_length == 0) index++;
last_value = value;
}
return result;
}
@ -354,23 +390,29 @@ Handle<Object> RegExpImpl::AtomExecGlobal(Handle<JSRegExp> re,
// Irregexp implementation.
// Retrieves a compiled version of the regexp for either ASCII or non-ASCII
// strings. If the compiled version doesn't already exist, it is compiled
// Ensures that the regexp object contains a compiled version of the
// source for either ASCII or non-ASCII strings.
// If the compiled version doesn't already exist, it is compiled
// from the source pattern.
// Irregexp is not feature complete yet. If there is something in the
// regexp that the compiler cannot currently handle, an empty
// handle is returned, but no exception is thrown.
static Handle<FixedArray> GetCompiledIrregexp(Handle<JSRegExp> re,
bool is_ascii) {
ASSERT(re->DataAt(JSRegExp::kIrregexpDataIndex)->IsFixedArray());
Handle<FixedArray> alternatives(
FixedArray::cast(re->DataAt(JSRegExp::kIrregexpDataIndex)));
ASSERT_EQ(2, alternatives->length());
int index = is_ascii ? 0 : 1;
Object* entry = alternatives->get(index);
if (!entry->IsNull()) {
return Handle<FixedArray>(FixedArray::cast(entry));
// If compilation fails, an exception is thrown and this function
// returns false.
bool RegExpImpl::EnsureCompiledIrregexp(Handle<JSRegExp> re,
bool is_ascii) {
int index;
if (is_ascii) {
index = JSRegExp::kIrregexpASCIICodeIndex;
} else {
index = JSRegExp::kIrregexpUC16CodeIndex;
}
Object* entry = re->DataAt(index);
if (!entry->IsTheHole()) {
// A value has already been compiled.
if (entry->IsJSObject()) {
// If it's a JS value, it's an error.
Top::Throw(entry);
return false;
}
return true;
}
// Compile the RegExp.
@ -392,77 +434,115 @@ static Handle<FixedArray> GetCompiledIrregexp(Handle<JSRegExp> re,
pattern,
compile_data.error,
"malformed_regexp");
return Handle<FixedArray>::null();
return false;
}
Handle<FixedArray> compiled_entry =
RegExpEngine::CompilationResult result =
RegExpEngine::Compile(&compile_data,
flags.is_ignore_case(),
flags.is_multiline(),
pattern,
is_ascii);
if (!compiled_entry.is_null()) {
alternatives->set(index, *compiled_entry);
if (result.error_message != NULL) {
// Unable to compile regexp.
Handle<JSArray> array = Factory::NewJSArray(2);
SetElement(array, 0, pattern);
SetElement(array,
1,
Factory::NewStringFromUtf8(CStrVector(result.error_message)));
Handle<Object> regexp_err =
Factory::NewSyntaxError("malformed_regexp", array);
Top::Throw(*regexp_err);
re->SetDataAt(index, *regexp_err);
return false;
}
return compiled_entry;
NoHandleAllocation no_handles;
FixedArray* data = FixedArray::cast(re->data());
data->set(index, result.code);
int register_max = IrregexpMaxRegisterCount(data);
if (result.num_registers > register_max) {
SetIrregexpMaxRegisterCount(data, result.num_registers);
}
return true;
}
int RegExpImpl::IrregexpNumberOfCaptures(Handle<FixedArray> irre) {
return Smi::cast(irre->get(kIrregexpNumberOfCapturesIndex))->value();
int RegExpImpl::IrregexpMaxRegisterCount(FixedArray* re) {
return Smi::cast(
re->get(JSRegExp::kIrregexpMaxRegisterCountIndex))->value();
}
int RegExpImpl::IrregexpNumberOfRegisters(Handle<FixedArray> irre) {
return Smi::cast(irre->get(kIrregexpNumberOfRegistersIndex))->value();
void RegExpImpl::SetIrregexpMaxRegisterCount(FixedArray* re, int value) {
re->set(JSRegExp::kIrregexpMaxRegisterCountIndex, Smi::FromInt(value));
}
Handle<ByteArray> RegExpImpl::IrregexpByteCode(Handle<FixedArray> irre) {
ASSERT(Smi::cast(irre->get(kIrregexpImplementationIndex))->value()
== RegExpMacroAssembler::kBytecodeImplementation);
return Handle<ByteArray>(ByteArray::cast(irre->get(kIrregexpCodeIndex)));
int RegExpImpl::IrregexpNumberOfCaptures(FixedArray* re) {
return Smi::cast(re->get(JSRegExp::kIrregexpCaptureCountIndex))->value();
}
Handle<Code> RegExpImpl::IrregexpNativeCode(Handle<FixedArray> irre) {
ASSERT(Smi::cast(irre->get(kIrregexpImplementationIndex))->value()
!= RegExpMacroAssembler::kBytecodeImplementation);
return Handle<Code>(Code::cast(irre->get(kIrregexpCodeIndex)));
int RegExpImpl::IrregexpNumberOfRegisters(FixedArray* re) {
return Smi::cast(re->get(JSRegExp::kIrregexpMaxRegisterCountIndex))->value();
}
Handle<Object>RegExpImpl::IrregexpPrepare(Handle<JSRegExp> re,
Handle<String> pattern,
JSRegExp::Flags flags) {
// Make space for ASCII and UC16 versions.
Handle<FixedArray> alternatives = Factory::NewFixedArray(2);
alternatives->set_null(0);
alternatives->set_null(1);
Factory::SetRegExpData(re, JSRegExp::IRREGEXP, pattern, flags, alternatives);
return re;
ByteArray* RegExpImpl::IrregexpByteCode(FixedArray* re, bool is_ascii) {
int index;
if (is_ascii) {
index = JSRegExp::kIrregexpASCIICodeIndex;
} else {
index = JSRegExp::kIrregexpUC16CodeIndex;
}
return ByteArray::cast(re->get(index));
}
Code* RegExpImpl::IrregexpNativeCode(FixedArray* re, bool is_ascii) {
int index;
if (is_ascii) {
index = JSRegExp::kIrregexpASCIICodeIndex;
} else {
index = JSRegExp::kIrregexpUC16CodeIndex;
}
return Code::cast(re->get(index));
}
void RegExpImpl::IrregexpPrepare(Handle<JSRegExp> re,
Handle<String> pattern,
JSRegExp::Flags flags,
int capture_count) {
// Initialize compiled code entries to null.
Factory::SetRegExpIrregexpData(re,
JSRegExp::IRREGEXP,
pattern,
flags,
capture_count);
}
Handle<Object> RegExpImpl::IrregexpExec(Handle<JSRegExp> regexp,
Handle<String> subject,
Handle<Object> index) {
int index,
Handle<JSArray> last_match_info) {
ASSERT_EQ(regexp->TypeTag(), JSRegExp::IRREGEXP);
ASSERT(regexp->DataAt(JSRegExp::kIrregexpDataIndex)->IsFixedArray());
bool is_ascii = StringShape(*subject).IsAsciiRepresentation();
Handle<FixedArray> irregexp = GetCompiledIrregexp(regexp, is_ascii);
if (irregexp.is_null()) {
// We can't handle the RegExp with IRRegExp.
if (!EnsureCompiledIrregexp(regexp, is_ascii)) {
return Handle<Object>::null();
}
// Prepare space for the return values.
int number_of_registers = IrregexpNumberOfRegisters(irregexp);
OffsetsVector offsets(number_of_registers);
Handle<FixedArray> re_data(FixedArray::cast(regexp->data()));
int number_of_capture_registers =
(IrregexpNumberOfCaptures(*re_data) + 1) * 2;
OffsetsVector offsets(number_of_capture_registers);
int num_captures = IrregexpNumberOfCaptures(irregexp);
int previous_index = static_cast<int>(DoubleToInteger(index->Number()));
int previous_index = index;
#ifdef DEBUG
if (FLAG_trace_regexp_bytecodes) {
@ -476,8 +556,11 @@ Handle<Object> RegExpImpl::IrregexpExec(Handle<JSRegExp> regexp,
FlattenString(subject);
}
return IrregexpExecOnce(irregexp,
num_captures,
last_match_info->EnsureSize(number_of_capture_registers + kLastMatchOverhead);
return IrregexpExecOnce(re_data,
number_of_capture_registers,
last_match_info,
subject,
previous_index,
offsets.vector(),
@ -486,29 +569,33 @@ Handle<Object> RegExpImpl::IrregexpExec(Handle<JSRegExp> regexp,
Handle<Object> RegExpImpl::IrregexpExecGlobal(Handle<JSRegExp> regexp,
Handle<String> subject) {
Handle<String> subject,
Handle<JSArray> last_match_info) {
ASSERT_EQ(regexp->TypeTag(), JSRegExp::IRREGEXP);
Handle<FixedArray> irregexp(FixedArray::cast(regexp->data()));
bool is_ascii = StringShape(*subject).IsAsciiRepresentation();
Handle<FixedArray> irregexp = GetCompiledIrregexp(regexp, is_ascii);
if (irregexp.is_null()) {
if (!EnsureCompiledIrregexp(regexp, is_ascii)) {
return Handle<Object>::null();
}
// Prepare space for the return values.
int number_of_registers = IrregexpNumberOfRegisters(irregexp);
OffsetsVector offsets(number_of_registers);
int number_of_capture_registers =
(IrregexpNumberOfCaptures(*irregexp) + 1) * 2;
OffsetsVector offsets(number_of_capture_registers);
int previous_index = 0;
Handle<JSArray> result = Factory::NewJSArray(0);
int i = 0;
int result_length = 0;
Handle<Object> matches;
if (!subject->IsFlat(StringShape(*subject))) {
FlattenString(subject);
}
last_match_info->EnsureSize(number_of_capture_registers + kLastMatchOverhead);
while (true) {
if (previous_index > subject->length() || previous_index < 0) {
// Per ECMA-262 15.10.6.2, if the previous index is greater than the
@ -523,8 +610,10 @@ Handle<Object> RegExpImpl::IrregexpExecGlobal(Handle<JSRegExp> regexp,
PrintF("\n\nSubject string: '%s'\n\n", *(subject->ToCString()));
}
#endif
HandleScope scope;
matches = IrregexpExecOnce(irregexp,
IrregexpNumberOfCaptures(irregexp),
number_of_capture_registers,
last_match_info,
subject,
previous_index,
offsets.vector(),
@ -536,12 +625,25 @@ Handle<Object> RegExpImpl::IrregexpExecGlobal(Handle<JSRegExp> regexp,
}
if (matches->IsJSArray()) {
SetElement(result, i, matches);
i++;
previous_index = offsets.vector()[1];
if (offsets.vector()[0] == offsets.vector()[1]) {
previous_index++;
// Create an array that looks like the static last_match_info array
// that is attached to the global RegExp object. We will be returning
// an array of these.
Handle<FixedArray> matches_array(JSArray::cast(*matches)->elements());
Handle<JSArray> latest_match =
Factory::NewJSArray(kFirstCapture + number_of_capture_registers);
Handle<FixedArray> latest_match_array(latest_match->elements());
for (int i = 0; i < number_of_capture_registers; i++) {
SetCapture(*latest_match_array, i, GetCapture(*matches_array, i));
}
SetLastCaptureCount(*latest_match_array, number_of_capture_registers);
SetElement(result, result_length, latest_match);
result_length++;
previous_index = GetCapture(*matches_array, 1);
if (GetCapture(*matches_array, 0) == previous_index)
previous_index++;
} else {
ASSERT(matches->IsNull());
return result;
@ -551,131 +653,125 @@ Handle<Object> RegExpImpl::IrregexpExecGlobal(Handle<JSRegExp> regexp,
}
Handle<Object> RegExpImpl::IrregexpExecOnce(Handle<FixedArray> irregexp,
int num_captures,
Handle<Object> RegExpImpl::IrregexpExecOnce(Handle<FixedArray> regexp,
int number_of_capture_registers,
Handle<JSArray> last_match_info,
Handle<String> subject,
int previous_index,
int* offsets_vector,
int offsets_vector_length) {
ASSERT(subject->IsFlat(StringShape(*subject)));
StringShape shape(*subject);
ASSERT(subject->IsFlat(shape));
bool is_ascii = shape.IsAsciiRepresentation();
bool rc;
int tag = Smi::cast(irregexp->get(kIrregexpImplementationIndex))->value();
switch (tag) {
case RegExpMacroAssembler::kIA32Implementation: {
Handle<String> original_subject = subject;
if (FLAG_regexp_native) {
#ifndef ARM
Handle<Code> code = IrregexpNativeCode(irregexp);
Handle<Code> code(IrregexpNativeCode(*regexp, is_ascii));
StringShape shape(*subject);
// Character offsets into string.
int start_offset = previous_index;
int end_offset = subject->length(shape);
// Character offsets into string.
int start_offset = previous_index;
int end_offset = subject->length(shape);
if (shape.IsCons()) {
subject = Handle<String>(ConsString::cast(*subject)->first());
} else if (shape.IsSliced()) {
SlicedString* slice = SlicedString::cast(*subject);
start_offset += slice->start();
end_offset += slice->start();
subject = Handle<String>(slice->buffer());
}
if (shape.IsCons()) {
subject = Handle<String>(ConsString::cast(*subject)->first());
} else if (shape.IsSliced()) {
SlicedString* slice = SlicedString::cast(*subject);
start_offset += slice->start();
end_offset += slice->start();
subject = Handle<String>(slice->buffer());
// String is now either Sequential or External
StringShape flatshape(*subject);
bool is_ascii = flatshape.IsAsciiRepresentation();
int char_size_shift = is_ascii ? 0 : 1;
RegExpMacroAssemblerIA32::Result res;
if (flatshape.IsExternal()) {
const byte* address;
if (is_ascii) {
ExternalAsciiString* ext = ExternalAsciiString::cast(*subject);
address = reinterpret_cast<const byte*>(ext->resource()->data());
} else {
ExternalTwoByteString* ext = ExternalTwoByteString::cast(*subject);
address = reinterpret_cast<const byte*>(ext->resource()->data());
}
res = RegExpMacroAssemblerIA32::Execute(
*code,
const_cast<Address*>(&address),
start_offset << char_size_shift,
end_offset << char_size_shift,
offsets_vector,
previous_index == 0);
} else { // Sequential string
ASSERT(StringShape(*subject).IsSequential());
Address char_address =
is_ascii ? SeqAsciiString::cast(*subject)->GetCharsAddress()
: SeqTwoByteString::cast(*subject)->GetCharsAddress();
int byte_offset = char_address - reinterpret_cast<Address>(*subject);
res = RegExpMacroAssemblerIA32::Execute(
*code,
reinterpret_cast<Address*>(subject.location()),
byte_offset + (start_offset << char_size_shift),
byte_offset + (end_offset << char_size_shift),
offsets_vector,
previous_index == 0);
}
// String is now either Sequential or External
StringShape flatshape(*subject);
bool is_ascii = flatshape.IsAsciiRepresentation();
int char_size_shift = is_ascii ? 0 : 1;
if (res == RegExpMacroAssemblerIA32::EXCEPTION) {
ASSERT(Top::has_pending_exception());
return Handle<Object>::null();
}
rc = (res == RegExpMacroAssemblerIA32::SUCCESS);
RegExpMacroAssemblerIA32::Result res;
if (flatshape.IsExternal()) {
const byte* address;
if (is_ascii) {
ExternalAsciiString* ext = ExternalAsciiString::cast(*subject);
address = reinterpret_cast<const byte*>(ext->resource()->data());
} else {
ExternalTwoByteString* ext = ExternalTwoByteString::cast(*subject);
address = reinterpret_cast<const byte*>(ext->resource()->data());
}
res = RegExpMacroAssemblerIA32::Execute(
*code,
const_cast<Address*>(&address),
start_offset << char_size_shift,
end_offset << char_size_shift,
offsets_vector,
previous_index == 0);
} else { // Sequential string
ASSERT(StringShape(*subject).IsSequential());
Address char_address =
is_ascii ? SeqAsciiString::cast(*subject)->GetCharsAddress()
: SeqTwoByteString::cast(*subject)->GetCharsAddress();
int byte_offset = char_address - reinterpret_cast<Address>(*subject);
res = RegExpMacroAssemblerIA32::Execute(
*code,
reinterpret_cast<Address*>(subject.location()),
byte_offset + (start_offset << char_size_shift),
byte_offset + (end_offset << char_size_shift),
offsets_vector,
previous_index == 0);
}
if (res == RegExpMacroAssemblerIA32::EXCEPTION) {
ASSERT(Top::has_pending_exception());
return Handle<Object>::null();
}
rc = (res == RegExpMacroAssemblerIA32::SUCCESS);
if (rc) {
// Capture values are relative to start_offset only.
for (int i = 0; i < offsets_vector_length; i++) {
if (offsets_vector[i] >= 0) {
offsets_vector[i] += previous_index;
}
if (rc) {
// Capture values are relative to start_offset only.
for (int i = 0; i < offsets_vector_length; i++) {
if (offsets_vector[i] >= 0) {
offsets_vector[i] += previous_index;
}
}
break;
}
} else {
#else
UNIMPLEMENTED();
rc = false;
break;
// Unimplemented on ARM, fall through to bytecode.
}
{
#endif
for (int i = number_of_capture_registers - 1; i >= 0; i--) {
offsets_vector[i] = -1;
}
case RegExpMacroAssembler::kBytecodeImplementation: {
for (int i = (num_captures + 1) * 2 - 1; i >= 0; i--) {
offsets_vector[i] = -1;
}
Handle<ByteArray> byte_codes = IrregexpByteCode(irregexp);
Handle<ByteArray> byte_codes(IrregexpByteCode(*regexp, is_ascii));
rc = IrregexpInterpreter::Match(byte_codes,
subject,
offsets_vector,
previous_index);
break;
}
case RegExpMacroAssembler::kARMImplementation:
default:
UNREACHABLE();
rc = false;
break;
rc = IrregexpInterpreter::Match(byte_codes,
subject,
offsets_vector,
previous_index);
}
if (!rc) {
return Factory::null_value();
}
Handle<FixedArray> array = Factory::NewFixedArray(2 * (num_captures+1));
FixedArray* array = last_match_info->elements();
ASSERT(array->length() >= number_of_capture_registers + kLastMatchOverhead);
// The captures come in (start, end+1) pairs.
for (int i = 0; i < 2 * (num_captures + 1); i += 2) {
array->set(i, Smi::FromInt(offsets_vector[i]));
array->set(i + 1, Smi::FromInt(offsets_vector[i + 1]));
for (int i = 0; i < number_of_capture_registers; i += 2) {
SetCapture(array, i, offsets_vector[i]);
SetCapture(array, i + 1, offsets_vector[i + 1]);
}
return Factory::NewJSArrayWithElements(array);
SetLastCaptureCount(array, number_of_capture_registers);
SetLastSubject(array, *original_subject);
SetLastInput(array, *original_subject);
return last_match_info;
}
// -------------------------------------------------------------------
// Implmentation of the Irregexp regular expression engine.
// Implementation of the Irregexp regular expression engine.
//
// The Irregexp regular expression engine is intended to be a complete
// implementation of ECMAScript regular expressions. It generates either
@ -892,10 +988,10 @@ class RegExpCompiler {
return next_register_++;
}
Handle<FixedArray> Assemble(RegExpMacroAssembler* assembler,
RegExpNode* start,
int capture_count,
Handle<String> pattern);
RegExpEngine::CompilationResult Assemble(RegExpMacroAssembler* assembler,
RegExpNode* start,
int capture_count,
Handle<String> pattern);
inline void AddWork(RegExpNode* node) { work_list_->Add(node); }
@ -940,15 +1036,8 @@ class RecursionCheck {
};
static Handle<FixedArray> IrregexpRegExpTooBig(Handle<String> pattern) {
Handle<JSArray> array = Factory::NewJSArray(2);
SetElement(array, 0, pattern);
const char* message = "RegExp too big";
SetElement(array, 1, Factory::NewStringFromUtf8(CStrVector(message)));
Handle<Object> regexp_err =
Factory::NewSyntaxError("malformed_regexp", array);
Top::Throw(*regexp_err);
return Handle<FixedArray>();
static RegExpEngine::CompilationResult IrregexpRegExpTooBig() {
return RegExpEngine::CompilationResult("RegExp too big");
}
@ -966,7 +1055,7 @@ RegExpCompiler::RegExpCompiler(int capture_count, bool ignore_case, bool ascii)
}
Handle<FixedArray> RegExpCompiler::Assemble(
RegExpEngine::CompilationResult RegExpCompiler::Assemble(
RegExpMacroAssembler* macro_assembler,
RegExpNode* start,
int capture_count,
@ -988,24 +1077,17 @@ Handle<FixedArray> RegExpCompiler::Assemble(
while (!work_list.is_empty()) {
work_list.RemoveLast()->Emit(this, &new_trace);
}
if (reg_exp_too_big_) return IrregexpRegExpTooBig(pattern);
Handle<FixedArray> array =
Factory::NewFixedArray(RegExpImpl::kIrregexpDataLength);
array->set(RegExpImpl::kIrregexpImplementationIndex,
Smi::FromInt(macro_assembler_->Implementation()));
array->set(RegExpImpl::kIrregexpNumberOfRegistersIndex,
Smi::FromInt(next_register_));
array->set(RegExpImpl::kIrregexpNumberOfCapturesIndex,
Smi::FromInt(capture_count));
if (reg_exp_too_big_) return IrregexpRegExpTooBig();
Handle<Object> code = macro_assembler_->GetCode(pattern);
array->set(RegExpImpl::kIrregexpCodeIndex, *code);
work_list_ = NULL;
#ifdef DEBUG
if (FLAG_trace_regexp_assembler) {
delete macro_assembler_;
}
#endif
return array;
return RegExpEngine::CompilationResult(*code, next_register_);
}
@ -3723,9 +3805,6 @@ RegExpNode* RegExpQuantifier::ToNode(int min,
// |
// [if r >= f] \----> ...
//
//
// TODO(someone): clear captures on repetition and handle empty
// matches.
// 15.10.2.5 RepeatMatcher algorithm.
// The parser has already eliminated the case where max is 0. In the case
@ -4592,13 +4671,13 @@ void DispatchTableConstructor::VisitAction(ActionNode* that) {
}
Handle<FixedArray> RegExpEngine::Compile(RegExpCompileData* data,
bool ignore_case,
bool is_multiline,
Handle<String> pattern,
bool is_ascii) {
RegExpEngine::CompilationResult RegExpEngine::Compile(RegExpCompileData* data,
bool ignore_case,
bool is_multiline,
Handle<String> pattern,
bool is_ascii) {
if ((data->capture_count + 1) * 2 - 1 > RegExpMacroAssembler::kMaxRegister) {
return IrregexpRegExpTooBig(pattern);
return IrregexpRegExpTooBig();
}
RegExpCompiler compiler(data->capture_count, ignore_case, is_ascii);
// Wrap the body of the regexp in capture #0.

109
src/jsregexp.h
View File

@ -51,6 +51,7 @@ class RegExpImpl {
// Parses the RegExp pattern and prepares the JSRegExp object with
// generic data and choice of implementation - as well as what
// the implementation wants to store in the data field.
// Returns false if compilation fails.
static Handle<Object> Compile(Handle<JSRegExp> re,
Handle<String> pattern,
Handle<String> flags);
@ -59,38 +60,46 @@ class RegExpImpl {
// This function calls the garbage collector if necessary.
static Handle<Object> Exec(Handle<JSRegExp> regexp,
Handle<String> subject,
Handle<Object> index);
int index,
Handle<JSArray> lastMatchInfo);
// Call RegExp.prototyp.exec(string) in a loop.
// Used by String.prototype.match and String.prototype.replace.
// This function calls the garbage collector if necessary.
static Handle<Object> ExecGlobal(Handle<JSRegExp> regexp,
Handle<String> subject);
Handle<String> subject,
Handle<JSArray> lastMatchInfo);
// Prepares a JSRegExp object with Irregexp-specific data.
static Handle<Object> IrregexpPrepare(Handle<JSRegExp> re,
Handle<String> pattern,
JSRegExp::Flags flags);
static void IrregexpPrepare(Handle<JSRegExp> re,
Handle<String> pattern,
JSRegExp::Flags flags,
int capture_register_count);
static Handle<Object> AtomCompile(Handle<JSRegExp> re,
Handle<String> pattern,
JSRegExp::Flags flags,
Handle<String> match_pattern);
static void AtomCompile(Handle<JSRegExp> re,
Handle<String> pattern,
JSRegExp::Flags flags,
Handle<String> match_pattern);
static Handle<Object> AtomExec(Handle<JSRegExp> regexp,
Handle<String> subject,
Handle<Object> index);
int index,
Handle<JSArray> lastMatchInfo);
static Handle<Object> AtomExecGlobal(Handle<JSRegExp> regexp,
Handle<String> subject);
Handle<String> subject,
Handle<JSArray> lastMatchInfo);
// Execute an Irregexp bytecode pattern.
static Handle<Object> IrregexpExec(Handle<JSRegExp> regexp,
Handle<String> subject,
Handle<Object> index);
int index,
Handle<JSArray> lastMatchInfo);
static Handle<Object> IrregexpExecGlobal(Handle<JSRegExp> regexp,
Handle<String> subject);
Handle<String> subject,
Handle<JSArray> lastMatchInfo);
static void NewSpaceCollectionPrologue();
static void OldSpaceCollectionPrologue();
@ -101,26 +110,54 @@ class RegExpImpl {
static Handle<String> StringToTwoByte(Handle<String> pattern);
static Handle<String> CachedStringToTwoByte(Handle<String> pattern);
static const int kIrregexpImplementationIndex = 0;
static const int kIrregexpNumberOfCapturesIndex = 1;
static const int kIrregexpNumberOfRegistersIndex = 2;
static const int kIrregexpCodeIndex = 3;
static const int kIrregexpDataLength = 4;
// Offsets in the lastMatchInfo array.
static const int kLastCaptureCount = 0;
static const int kLastSubject = 1;
static const int kLastInput = 2;
static const int kFirstCapture = 1;
static const int kLastMatchOverhead = 3;
static int GetCapture(FixedArray* array, int index) {
return Smi::cast(array->get(index + kFirstCapture))->value();
}
static void SetLastCaptureCount(FixedArray* array, int to) {
array->set(kLastCaptureCount, Smi::FromInt(to));
}
static void SetLastSubject(FixedArray* array, String* to) {
int capture_count = GetLastCaptureCount(array);
array->set(capture_count + kLastSubject, to);
}
static void SetLastInput(FixedArray* array, String* to) {
int capture_count = GetLastCaptureCount(array);
array->set(capture_count + kLastInput, to);
}
static void SetCapture(FixedArray* array, int index, int to) {
array->set(index + kFirstCapture, Smi::FromInt(to));
}
private:
static String* last_ascii_string_;
static String* two_byte_cached_string_;
static int IrregexpNumberOfCaptures(Handle<FixedArray> re);
static int IrregexpNumberOfRegisters(Handle<FixedArray> re);
static Handle<ByteArray> IrregexpByteCode(Handle<FixedArray> re);
static Handle<Code> IrregexpNativeCode(Handle<FixedArray> re);
static bool EnsureCompiledIrregexp(Handle<JSRegExp> re, bool is_ascii);
static int IrregexpMaxRegisterCount(FixedArray* re);
static void SetIrregexpMaxRegisterCount(FixedArray* re, int value);
static int IrregexpNumberOfCaptures(FixedArray* re);
static int IrregexpNumberOfRegisters(FixedArray* re);
static ByteArray* IrregexpByteCode(FixedArray* re, bool is_ascii);
static Code* IrregexpNativeCode(FixedArray* re, bool is_ascii);
// On a successful match, the result is a JSArray containing
// captured positions. On a failure, the result is the null value.
// Returns an empty handle in case of an exception.
static Handle<Object> IrregexpExecOnce(Handle<FixedArray> regexp,
int num_captures,
Handle<JSArray> lastMatchInfo,
Handle<String> subject16,
int previous_index,
int* ovector,
@ -134,6 +171,10 @@ class RegExpImpl {
int character_position,
int utf8_position);
// Used to access the lastMatchInfo array.
static int GetLastCaptureCount(FixedArray* array) {
return Smi::cast(array->get(kLastCaptureCount))->value();
}
// A one element cache of the last utf8_subject string and its length. The
// subject JS String object is cached in the heap. We also cache a
// translation between position and utf8 position.
@ -1319,11 +1360,25 @@ struct RegExpCompileData {
class RegExpEngine: public AllStatic {
public:
static Handle<FixedArray> Compile(RegExpCompileData* input,
bool ignore_case,
bool multiline,
Handle<String> pattern,
bool is_ascii);
struct CompilationResult {
explicit CompilationResult(const char* error_message)
: error_message(error_message),
code(Heap::the_hole_value()),
num_registers(0) {}
CompilationResult(Object* code, int registers)
: error_message(NULL),
code(code),
num_registers(registers) {}
const char* error_message;
Object* code;
int num_registers;
};
static CompilationResult Compile(RegExpCompileData* input,
bool ignore_case,
bool multiline,
Handle<String> pattern,
bool is_ascii);
static void DotPrint(const char* label, RegExpNode* node, bool ignore_case);
};

21
src/macros.py
View File

@ -1,4 +1,4 @@
# Copyright 2006-2008 the V8 project authors. All rights reserved.
# Copyright 2006-2009 the V8 project authors. All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
@ -99,3 +99,22 @@ python macro CHAR_CODE(str) = ord(str[1]);
# Accessors for original global properties that ensure they have been loaded.
const ORIGINAL_REGEXP = (global.RegExp, $RegExp);
const ORIGINAL_DATE = (global.Date, $Date);
# Constants used on an array to implement the properties of the RegExp object.
const REGEXP_NUMBER_OF_CAPTURES = 0;
const REGEXP_FIRST_CAPTURE = 1;
# We can't put macros in macros so we use constants here.
# REGEXP_NUMBER_OF_CAPTURES
macro NUMBER_OF_CAPTURES(array) = ((array)[0]);
# Last input and last subject are after the captures so we can omit them on
# results returned from global searches. Beware - these evaluate their
# arguments twice.
macro LAST_SUBJECT(array) = ((array)[(array)[0] + 1]);
macro LAST_INPUT(array) = ((array)[(array)[0] + 2]);
# REGEXP_FIRST_CAPTURE
macro CAPTURE(index) = (1 + (index));
const CAPTURE0 = 1;
const CAPTURE1 = 2;

15
src/objects-debug.cc
View File

@ -696,9 +696,20 @@ void JSRegExp::JSRegExpVerify() {
break;
}
case JSRegExp::IRREGEXP: {
bool is_native = FLAG_regexp_native;
#ifdef ARM
// No native regexp on arm yet.
is_native = false;
#endif
FixedArray* arr = FixedArray::cast(data());
Object* irregexp_data = arr->get(JSRegExp::kIrregexpDataIndex);
ASSERT(irregexp_data->IsFixedArray());
Object* ascii_data = arr->get(JSRegExp::kIrregexpASCIICodeIndex);
ASSERT(ascii_data->IsTheHole()
|| (is_native ? ascii_data->IsCode() : ascii_data->IsByteArray()));
Object* uc16_data = arr->get(JSRegExp::kIrregexpUC16CodeIndex);
ASSERT(uc16_data->IsTheHole()
|| (is_native ? uc16_data->IsCode() : uc16_data->IsByteArray()));
ASSERT(arr->get(JSRegExp::kIrregexpCaptureCountIndex)->IsSmi());
ASSERT(arr->get(JSRegExp::kIrregexpMaxRegisterCountIndex)->IsSmi());
break;
}
default:

7
src/objects-inl.h
View File

@ -2338,6 +2338,13 @@ Object* JSRegExp::DataAt(int index) {
}
void JSRegExp::SetDataAt(int index, Object* value) {
ASSERT(TypeTag() != NOT_COMPILED);
ASSERT(index >= kDataIndex); // Only implementation data can be set this way.
FixedArray::cast(data())->set(index, value);
}
bool JSObject::HasFastElements() {
return !elements()->IsDictionary();
}

16
src/objects.cc
View File

@ -4888,6 +4888,22 @@ Object* JSArray::Initialize(int capacity) {
}
void JSArray::EnsureSize(int required_size) {
Handle<JSArray> self(this);
ASSERT(HasFastElements());
if (elements()->length() >= required_size) return;
Handle<FixedArray> old_backing(elements());
int old_size = old_backing->length();
// Doubling in size would be overkill, but leave some slack to avoid
// constantly growing.
int new_size = required_size + (required_size >> 3);
Handle<FixedArray> new_backing = Factory::NewFixedArray(new_size);
// Can't use this any more now because we may have had a GC!
for (int i = 0; i < old_size; i++) new_backing->set(i, old_backing->get(i));
self->SetContent(*new_backing);
}
// Computes the new capacity when expanding the elements of a JSObject.
static int NewElementsCapacity(int old_capacity) {
// (old_capacity + 50%) + 16

44
src/objects.h
View File

@ -2966,6 +2966,19 @@ class JSValue: public JSObject {
};
// Regular expressions
// The regular expression holds a single reference to a FixedArray in
// the kDataOffset field.
// The FixedArray contains the following data:
// - tag : type of regexp implementation (not compiled yet, atom or irregexp)
// - reference to the original source string
// - reference to the original flag string
// If it is an atom regexp
// - a reference to a literal string to search for
// If it is an irregexp regexp:
// - a reference to code for ASCII inputs (bytecode or compiled).
// - a reference to code for UC16 inputs (bytecode or compiled).
// - max number of registers used by irregexp implementations.
// - number of capture registers (output values) of the regexp.
class JSRegExp: public JSObject {
public:
// Meaning of Type:
@ -2993,6 +3006,8 @@ class JSRegExp: public JSObject {
inline Flags GetFlags();
inline String* Pattern();
inline Object* DataAt(int index);
// Set implementation data after the object has been prepared.
inline void SetDataAt(int index, Object* value);
static inline JSRegExp* cast(Object* obj);
@ -3004,14 +3019,29 @@ class JSRegExp: public JSObject {
static const int kDataOffset = JSObject::kHeaderSize;
static const int kSize = kDataOffset + kIntSize;
// Indices in the data array.
static const int kTagIndex = 0;
static const int kSourceIndex = kTagIndex + 1;
static const int kFlagsIndex = kSourceIndex + 1;
// These two are the same since the same entry is shared for
// different purposes in different types of regexps.
static const int kAtomPatternIndex = kFlagsIndex + 1;
static const int kIrregexpDataIndex = kFlagsIndex + 1;
static const int kDataSize = kAtomPatternIndex + 1;
static const int kDataIndex = kFlagsIndex + 1;
// The data fields are used in different ways depending on the
// value of the tag.
// Atom regexps (literal strings).
static const int kAtomPatternIndex = kDataIndex;
static const int kAtomDataSize = kAtomPatternIndex + 1;
// Irregexp compiled code or bytecode for ASCII.
static const int kIrregexpASCIICodeIndex = kDataIndex;
// Irregexp compiled code or bytecode for UC16.
static const int kIrregexpUC16CodeIndex = kDataIndex + 1;
// Maximal number of registers used by either ASCII or UC16.
// Only used to check that there is enough stack space
static const int kIrregexpMaxRegisterCountIndex = kDataIndex + 2;
// Number of captures in the compiled regexp.
static const int kIrregexpCaptureCountIndex = kDataIndex + 3;
static const int kIrregexpDataSize = kIrregexpCaptureCountIndex + 1;
};
@ -3806,6 +3836,10 @@ class JSArray: public JSObject {
// Casting.
static inline JSArray* cast(Object* obj);
// Uses handles. Ensures that the fixed array backing the JSArray has at
// least the stated size.
void EnsureSize(int minimum_size_of_backing_fixed_array);
// Dispatched behavior.
#ifdef DEBUG
void JSArrayPrint();

157
src/regexp-delay.js
View File

@ -1,4 +1,4 @@
// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Copyright 2006-2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
@ -52,7 +52,7 @@ function DoConstructRegExp(object, pattern, flags, isConstructorCall) {
var multiline = false;
for (var i = 0; i < flags.length; i++) {
var c = flags.charAt(i);
var c = StringCharAt.call(flags, i);
switch (c) {
case 'g':
// Allow duplicate flags to be consistent with JSC and others.
@ -117,15 +117,15 @@ function RegExpConstructor(pattern, flags) {
// Deprecated RegExp.prototype.compile method. We behave like the constructor
// were called again. In SpiderMonkey, this method returns the regexp object.
// In KJS, it returns undefined. For compatibility with KJS, we match their
// In JSC, it returns undefined. For compatibility with JSC, we match their
// behavior.
function CompileRegExp(pattern, flags) {
// Both KJS and SpiderMonkey treat a missing pattern argument as the
// Both JSC and SpiderMonkey treat a missing pattern argument as the
// empty subject string, and an actual undefined value passed as the
// patter as the string 'undefined'. Note that KJS is inconsistent
// pattern as the string 'undefined'. Note that JSC is inconsistent
// here, treating undefined values differently in
// RegExp.prototype.compile and in the constructor, where they are
// the empty string. For compatibility with KJS, we match their
// the empty string. For compatibility with JSC, we match their
// behavior.
if (IS_UNDEFINED(pattern) && %_ArgumentsLength() != 0) {
DoConstructRegExp(this, 'undefined', flags, false);
@ -135,35 +135,24 @@ function CompileRegExp(pattern, flags) {
}
// DoRegExpExec and DoRegExpExecGlobal are wrappers around the runtime
// %RegExp and %RegExpGlobal functions that ensure that the static
// properties of the RegExp constructor are set.
function DoRegExpExec(regexp, string, index) {
var matchIndices = %RegExpExec(regexp, string, index);
if (!IS_NULL(matchIndices)) {
regExpCaptures = matchIndices;
regExpSubject = regExpInput = string;
}
return matchIndices;
return %RegExpExec(regexp, string, index, lastMatchInfo);
}
function DoRegExpExecGlobal(regexp, string) {
// Here, matchIndices is an array of arrays of substring indices.
var matchIndices = %RegExpExecGlobal(regexp, string);
if (matchIndices.length != 0) {
regExpCaptures = matchIndices[matchIndices.length - 1];
regExpSubject = regExpInput = string;
}
return matchIndices;
// Returns an array of arrays of substring indices.
return %RegExpExecGlobal(regexp, string, lastMatchInfo);
}
function RegExpExec(string) {
if (!IS_REGEXP(this)) {
throw MakeTypeError('method_called_on_incompatible', ['RegExp.prototype.exec', this]);
throw MakeTypeError('method_called_on_incompatible',
['RegExp.prototype.exec', this]);
}
if (%_ArgumentsLength() == 0) {
var regExpInput = LAST_INPUT(lastMatchInfo);
if (IS_UNDEFINED(regExpInput)) {
throw MakeError('no_input_to_regexp', [this]);
}
@ -180,23 +169,21 @@ function RegExpExec(string) {
}
%_Log('regexp', 'regexp-exec,%0r,%1S,%2i', [this, s, lastIndex]);
// matchIndices is an array of integers with length of captures*2,
// each pair of integers specified the start and the end of index
// in the string.
var matchIndices = DoRegExpExec(this, s, i);
// matchIndices is either null or the lastMatchInfo array.
var matchIndices = %RegExpExec(this, s, i, lastMatchInfo);
if (matchIndices == null) {
if (this.global) this.lastIndex = 0;
return matchIndices; // no match
}
var numResults = matchIndices.length >> 1;
var numResults = NUMBER_OF_CAPTURES(lastMatchInfo) >> 1;
var result = new $Array(numResults);
for (var i = 0; i < numResults; i++) {
var matchStart = matchIndices[2*i];
var matchEnd = matchIndices[2*i + 1];
var matchStart = lastMatchInfo[CAPTURE(i << 1)];
var matchEnd = lastMatchInfo[CAPTURE((i << 1) + 1)];
if (matchStart != -1 && matchEnd != -1) {
result[i] = s.slice(matchStart, matchEnd);
result[i] = SubString(s, matchStart, matchEnd);
} else {
// Make sure the element is present. Avoid reading the undefined
// property from the global object since this may change.
@ -205,16 +192,50 @@ function RegExpExec(string) {
}
if (this.global)
this.lastIndex = matchIndices[1];
result.index = matchIndices[0];
this.lastIndex = lastMatchInfo[CAPTURE1];
result.index = lastMatchInfo[CAPTURE0];
result.input = s;
return result;
}
// Section 15.10.6.3 doesn't actually make sense, but the intention seems to be
// that test is defined in terms of String.prototype.exec even if the method is
// called on a non-RegExp object. However, it probably means the original
// value of String.prototype.exec, which is what everybody else implements.
function RegExpTest(string) {
var result = (%_ArgumentsLength() == 0) ? this.exec() : this.exec(string);
return result != null;
if (!IS_REGEXP(this)) {
throw MakeTypeError('method_called_on_incompatible',
['RegExp.prototype.test', this]);
}
if (%_ArgumentsLength() == 0) {
var regExpInput = LAST_INPUT(lastMatchInfo);
if (IS_UNDEFINED(regExpInput)) {
throw MakeError('no_input_to_regexp', [this]);
}
string = regExpInput;
}
var s = ToString(string);
var length = s.length;
var lastIndex = this.lastIndex;
var i = this.global ? TO_INTEGER(lastIndex) : 0;
if (i < 0 || i > s.length) {
this.lastIndex = 0;
return false;
}
%_Log('regexp', 'regexp-exec,%0r,%1S,%2i', [this, s, lastIndex]);
// matchIndices is either null or the lastMatchInfo array.
var matchIndices = %RegExpExec(this, s, i, lastMatchInfo);
if (matchIndices == null) {
if (this.global) this.lastIndex = 0;
return false;
}
if (this.global) this.lastIndex = lastMatchInfo[CAPTURE1];
return true;
}
@ -239,56 +260,72 @@ function RegExpToString() {
// on the captures array of the last successful match and the subject string
// of the last successful match.
function RegExpGetLastMatch() {
return regExpSubject.slice(regExpCaptures[0], regExpCaptures[1]);
var regExpSubject = LAST_SUBJECT(lastMatchInfo);
return SubString(regExpSubject,
lastMatchInfo[CAPTURE0],
lastMatchInfo[CAPTURE1]);
}
function RegExpGetLastParen() {
var length = regExpCaptures.length;
if (length <= 2) return ''; // There were no captures.
var length = NUMBER_OF_CAPTURES(lastMatchInfo);
if (length <= 2) return ''; // There were no captures.
// We match the SpiderMonkey behavior: return the substring defined by the
// last pair (after the first pair) of elements of the capture array even if
// it is empty.
return regExpSubject.slice(regExpCaptures[length - 2],
regExpCaptures[length - 1]);
var regExpSubject = LAST_SUBJECT(lastMatchInfo);
var start = lastMatchInfo[CAPTURE(length - 2)];
var end = lastMatchInfo[CAPTURE(length - 1)];
if (start != -1 && end != -1) {
return SubString(regExpSubject, start, end);
}
return "";
}
function RegExpGetLeftContext() {
return regExpSubject.slice(0, regExpCaptures[0]);
return SubString(LAST_SUBJECT(lastMatchInfo),
0,
lastMatchInfo[CAPTURE0]);
}
function RegExpGetRightContext() {
return regExpSubject.slice(regExpCaptures[1], regExpSubject.length);
var subject = LAST_SUBJECT(lastMatchInfo);
return SubString(subject,
lastMatchInfo[CAPTURE1],
subject.length);
}
// The properties $1..$9 are the first nine capturing substrings of the last
// successful match, or ''. The function RegExpMakeCaptureGetter will be
// called with an index greater than or equal to 1 but it actually works for
// any non-negative index.
// called with indeces from 1 to 9.
function RegExpMakeCaptureGetter(n) {
return function() {
var index = n * 2;
if (index >= regExpCaptures.length) return '';
var matchStart = regExpCaptures[index];
var matchEnd = regExpCaptures[index + 1];
if (index >= NUMBER_OF_CAPTURES(lastMatchInfo)) return '';
var matchStart = lastMatchInfo[CAPTURE(index)];
var matchEnd = lastMatchInfo[CAPTURE(index + 1)];
if (matchStart == -1 || matchEnd == -1) return '';
return regExpSubject.slice(matchStart, matchEnd);
return SubString(LAST_SUBJECT(lastMatchInfo), matchStart, matchEnd);
};
}
// Properties of the builtins object for recording the result of the last
// regexp match. The property regExpCaptures is the matchIndices array of the
// last successful regexp match (an array of start/end index pairs for the
// match and all the captured substrings), the invariant is that there is at
// least two elements. The property regExpSubject is the subject string for
// the last successful match.
var regExpCaptures = [0, 0];
var regExpSubject = '';
var regExpInput;
// Property of the builtins object for recording the result of the last
// regexp match. The property lastMatchInfo includes the matchIndices
// array of the last successful regexp match (an array of start/end index
// pairs for the match and all the captured substrings), the invariant is
// that there are at least two capture indeces. The array also contains
// the subject string for the last successful match.
var lastMatchInfo = [
2, // REGEXP_NUMBER_OF_CAPTURES
0, // REGEXP_FIRST_CAPTURE + 0
0, // REGEXP_FIRST_CAPTURE + 1
"", // Last subject.
void 0, // Last input - settable with RegExpSetInput.
];
// -------------------------------------------------------------------
@ -312,9 +349,13 @@ function SetupRegExp() {
// value is set the value it is set to is coerced to a string.
// Getter and setter for the input.
function RegExpGetInput() {
var regExpInput = LAST_INPUT(lastMatchInfo);
return IS_UNDEFINED(regExpInput) ? "" : regExpInput;
}
function RegExpSetInput(string) { regExpInput = ToString(string); }
function RegExpSetInput(string) {
lastMatchInfo[lastMatchInfo[REGEXP_NUMBER_OF_CAPTURES] + 2] =
ToString(string);
};
%DefineAccessor($RegExp, 'input', GETTER, RegExpGetInput, DONT_DELETE);
%DefineAccessor($RegExp, 'input', SETTER, RegExpSetInput, DONT_DELETE);

23
src/runtime.cc
View File

@ -930,14 +930,21 @@ static Object* Runtime_InitializeConstContextSlot(Arguments args) {
static Object* Runtime_RegExpExec(Arguments args) {
HandleScope scope;
ASSERT(args.length() == 3);
ASSERT(args.length() == 4);
CONVERT_CHECKED(JSRegExp, raw_regexp, args[0]);
Handle<JSRegExp> regexp(raw_regexp);
CONVERT_CHECKED(String, raw_subject, args[1]);
Handle<String> subject(raw_subject);
Handle<Object> index(args[2]);
ASSERT(index->IsNumber());
Handle<Object> result = RegExpImpl::Exec(regexp, subject, index);
// Due to the way the JS files are constructed this must be less than the
// length of a string, i.e. it is always a Smi. We check anyway for security.
CONVERT_CHECKED(Smi, index, args[2]);
CONVERT_CHECKED(JSArray, raw_last_match_info, args[3]);
Handle<JSArray> last_match_info(raw_last_match_info);
CHECK(last_match_info->HasFastElements());
Handle<Object> result = RegExpImpl::Exec(regexp,
subject,
index->value(),
last_match_info);
if (result.is_null()) return Failure::Exception();
return *result;
}
@ -945,12 +952,16 @@ static Object* Runtime_RegExpExec(Arguments args) {
static Object* Runtime_RegExpExecGlobal(Arguments args) {
HandleScope scope;
ASSERT(args.length() == 2);
ASSERT(args.length() == 3);
CONVERT_CHECKED(JSRegExp, raw_regexp, args[0]);
Handle<JSRegExp> regexp(raw_regexp);
CONVERT_CHECKED(String, raw_subject, args[1]);
Handle<String> subject(raw_subject);
Handle<Object> result = RegExpImpl::ExecGlobal(regexp, subject);
CONVERT_CHECKED(JSArray, raw_last_match_info, args[2]);
Handle<JSArray> last_match_info(raw_last_match_info);
CHECK(last_match_info->HasFastElements());
Handle<Object> result =
RegExpImpl::ExecGlobal(regexp, subject, last_match_info);
if (result.is_null()) return Failure::Exception();
return *result;
}

4
src/runtime.h
View File

@ -137,8 +137,8 @@ namespace v8 { namespace internal {
\
/* Regular expressions */ \
F(RegExpCompile, 3) \
F(RegExpExec, 3) \
F(RegExpExecGlobal, 2) \
F(RegExpExec, 4) \
F(RegExpExecGlobal, 3) \
\
/* Strings */ \
F(StringCharCodeAt, 2) \

156
src/string.js
View File

@ -165,8 +165,9 @@ function StringMatch(regexp) {
// Build the result array.
var result = new $Array(match_string);
for (var i = 0; i < matches.length; ++i) {
var match = matches[i];
var match_string = subject.slice(match[0], match[1]);
var matchInfo = matches[i];
var match_string = subject.slice(matchInfo[CAPTURE0],
matchInfo[CAPTURE1]);
result[i] = match_string;
}
@ -218,7 +219,9 @@ function StringReplace(search, replace) {
if (IS_FUNCTION(replace)) {
builder.add(replace.call(null, search, start, subject));
} else {
ExpandReplacement(ToString(replace), subject, [ start, end ], builder);
reusableMatchInfo[CAPTURE0] = start;
reusableMatchInfo[CAPTURE1] = end;
ExpandReplacement(ToString(replace), subject, reusableMatchInfo, builder);
}
// suffix
@ -228,6 +231,15 @@ function StringReplace(search, replace) {
}
// This has the same size as the lastMatchInfo array, and can be used for
// functions that expect that structure to be returned. It is used when the
// needle is a string rather than a regexp. In this case we can't update
// lastMatchArray without erroneously affecting the properties on the global
// RegExp object.
var reusableMatchInfo = [2, -1, -1, "", ""];
var reusableMatchArray = [ void 0 ];
// Helper function for regular expressions in String.prototype.replace.
function StringReplaceRegExp(subject, regexp, replace) {
// Compute an array of matches; each match is really a list of
@ -237,9 +249,10 @@ function StringReplaceRegExp(subject, regexp, replace) {
matches = DoRegExpExecGlobal(regexp, subject);
if (matches.length == 0) return subject;
} else {
var captures = DoRegExpExec(regexp, subject, 0);
if (IS_NULL(captures)) return subject;
matches = [ captures ];
var lastMatchInfo = DoRegExpExec(regexp, subject, 0);
if (IS_NULL(lastMatchInfo)) return subject;
reusableMatchArray[0] = lastMatchInfo;
matches = reusableMatchArray;
}
// Determine the number of matches.
@ -253,17 +266,17 @@ function StringReplaceRegExp(subject, regexp, replace) {
replace = ToString(replace);
if (%StringIndexOf(replace, "$", 0) < 0) {
for (var i = 0; i < length; i++) {
var captures = matches[i];
result.addSpecialSlice(previous, captures[0]);
var matchInfo = matches[i];
result.addSpecialSlice(previous, matchInfo[CAPTURE0]);
result.add(replace);
previous = captures[1]; // continue after match
previous = matchInfo[CAPTURE1]; // continue after match
}
} else {
for (var i = 0; i < length; i++) {
var captures = matches[i];
result.addSpecialSlice(previous, captures[0]);
ExpandReplacement(replace, subject, captures, result);
previous = captures[1]; // continue after match
var matchInfo = matches[i];
result.addSpecialSlice(previous, matchInfo[CAPTURE0]);
ExpandReplacement(replace, subject, matchInfo, result);
previous = matchInfo[CAPTURE1]; // continue after match
}
}
result.addSpecialSlice(previous, subject.length);
@ -273,7 +286,7 @@ function StringReplaceRegExp(subject, regexp, replace) {
// Expand the $-expressions in the string and return a new string with
// the result.
function ExpandReplacement(string, subject, captures, builder) {
function ExpandReplacement(string, subject, matchInfo, builder) {
var next = %StringIndexOf(string, '$', 0);
if (next < 0) {
builder.add(string);
@ -281,7 +294,7 @@ function ExpandReplacement(string, subject, captures, builder) {
}
// Compute the number of captures; see ECMA-262, 15.5.4.11, p. 102.
var m = captures.length >> 1; // includes the match
var m = NUMBER_OF_CAPTURES(matchInfo) >> 1; // Includes the match.
if (next > 0) builder.add(SubString(string, 0, next));
var length = string.length;
@ -299,13 +312,14 @@ function ExpandReplacement(string, subject, captures, builder) {
builder.add('$');
} else if (peek == 38) { // $& - match
++position;
builder.addSpecialSlice(captures[0], captures[1]);
builder.addSpecialSlice(matchInfo[CAPTURE0],
matchInfo[CAPTURE1]);
} else if (peek == 96) { // $` - prefix
++position;
builder.addSpecialSlice(0, captures[0]);
builder.addSpecialSlice(0, matchInfo[CAPTURE0]);
} else if (peek == 39) { // $' - suffix
++position;
builder.addSpecialSlice(captures[1], subject.length);
builder.addSpecialSlice(matchInfo[CAPTURE1], subject.length);
} else if (peek >= 48 && peek <= 57) { // $n, 0 <= n <= 9
++position;
var n = peek - 48;
@ -329,7 +343,7 @@ function ExpandReplacement(string, subject, captures, builder) {
}
}
if (0 < n && n < m) {
addCaptureString(builder, captures, n);
addCaptureString(builder, matchInfo, n);
} else {
// Because of the captures range check in the parsing of two
// digit capture references, we can only enter here when a
@ -361,26 +375,27 @@ function ExpandReplacement(string, subject, captures, builder) {
};
// Compute the string of a given PCRE capture.
function CaptureString(string, captures, index) {
// Compute the string of a given regular expression capture.
function CaptureString(string, lastCaptureInfo, index) {
// Scale the index.
var scaled = index << 1;
// Compute start and end.
var start = captures[scaled];
var end = captures[scaled + 1];
var start = lastCaptureInfo[CAPTURE(scaled)];
var end = lastCaptureInfo[CAPTURE(scaled + 1)];
// If either start or end is missing return undefined.
if (start < 0 || end < 0) return;
return SubString(string, start, end);
};
// Add the string of a given PCRE capture to the ReplaceResultBuilder
function addCaptureString(builder, captures, index) {
// Add the string of a given regular expression capture to the
// ReplaceResultBuilder
function addCaptureString(builder, matchInfo, index) {
// Scale the index.
var scaled = index << 1;
// Compute start and end.
var start = captures[scaled];
var end = captures[scaled + 1];
var start = matchInfo[CAPTURE(scaled)];
var end = matchInfo[CAPTURE(scaled + 1)];
// If either start or end is missing return.
if (start < 0 || end <= start) return;
builder.addSpecialSlice(start, end);
@ -396,10 +411,8 @@ function addCaptureString(builder, captures, index) {
// should be 'abcd' and not 'dddd' (or anything else).
function StringReplaceRegExpWithFunction(subject, regexp, replace) {
var result = new ReplaceResultBuilder(subject);
// Captures is an array of pairs of (start, end) indices for the match and
// any captured substrings.
var captures = DoRegExpExec(regexp, subject, 0);
if (IS_NULL(captures)) return subject;
var lastMatchInfo = DoRegExpExec(regexp, subject, 0);
if (IS_NULL(lastMatchInfo)) return subject;
// There's at least one match. If the regexp is global, we have to loop
// over all matches. The loop is not in C++ code here like the one in
@ -409,13 +422,16 @@ function StringReplaceRegExpWithFunction(subject, regexp, replace) {
if (regexp.global) {
var previous = 0;
do {
result.addSpecialSlice(previous, captures[0]);
result.add(ApplyReplacementFunction(replace, captures, subject));
result.addSpecialSlice(previous, lastMatchInfo[CAPTURE0]);
var startOfMatch = lastMatchInfo[CAPTURE0];
previous = lastMatchInfo[CAPTURE1];
result.add(ApplyReplacementFunction(replace, lastMatchInfo, subject));
// Can't use lastMatchInfo any more from here, since the function could
// overwrite it.
// Continue with the next match.
previous = captures[1];
// Increment previous if we matched an empty string, as per ECMA-262
// 15.5.4.10.
if (previous == captures[0]) {
if (previous == startOfMatch) {
// Add the skipped character to the output, if any.
if (previous < subject.length) {
result.addSpecialSlice(previous, previous + 1);
@ -425,19 +441,22 @@ function StringReplaceRegExpWithFunction(subject, regexp, replace) {
// Per ECMA-262 15.10.6.2, if the previous index is greater than the
// string length, there is no match
captures = (previous > subject.length)
lastMatchInfo = (previous > subject.length)
? null
: DoRegExpExec(regexp, subject, previous);
} while (!IS_NULL(captures));
} while (!IS_NULL(lastMatchInfo));
// Tack on the final right substring after the last match, if necessary.
if (previous < subject.length) {
result.addSpecialSlice(previous, subject.length);
}
} else { // Not a global regexp, no need to loop.
result.addSpecialSlice(0, captures[0]);
result.add(ApplyReplacementFunction(replace, captures, subject));
result.addSpecialSlice(captures[1], subject.length);
result.addSpecialSlice(0, lastMatchInfo[CAPTURE0]);
var endOfMatch = lastMatchInfo[CAPTURE1];
result.add(ApplyReplacementFunction(replace, lastMatchInfo, subject));
// Can't use lastMatchInfo any more from here, since the function could
// overwrite it.
result.addSpecialSlice(endOfMatch, subject.length);
}
return result.generate();
@ -445,20 +464,20 @@ function StringReplaceRegExpWithFunction(subject, regexp, replace) {
// Helper function to apply a string replacement function once.
function ApplyReplacementFunction(replace, captures, subject) {
function ApplyReplacementFunction(replace, lastMatchInfo, subject) {
// Compute the parameter list consisting of the match, captures, index,
// and subject for the replace function invocation.
var index = captures[0];
var index = lastMatchInfo[CAPTURE0];
// The number of captures plus one for the match.
var m = captures.length >> 1;
var m = NUMBER_OF_CAPTURES(lastMatchInfo) >> 1;
if (m == 1) {
var s = CaptureString(subject, captures, 0);
var s = CaptureString(subject, lastMatchInfo, 0);
// Don't call directly to avoid exposing the built-in global object.
return ToString(replace.call(null, s, index, subject));
}
var parameters = $Array(m + 2);
for (var j = 0; j < m; j++) {
parameters[j] = CaptureString(subject, captures, j);
parameters[j] = CaptureString(subject, lastMatchInfo, j);
}
parameters[j] = index;
parameters[j + 1] = subject;
@ -559,14 +578,14 @@ function StringSplit(separator, limit) {
return result;
}
var match = splitMatch(sep, subject, currentIndex, startIndex);
var lastMatchInfo = splitMatch(sep, subject, currentIndex, startIndex);
if (IS_NULL(match)) {
if (IS_NULL(lastMatchInfo)) {
result[result.length] = subject.slice(currentIndex, length);
return result;
}
var endIndex = match[0];
var endIndex = lastMatchInfo[CAPTURE1];
// We ignore a zero-length match at the currentIndex.
if (startIndex === endIndex && endIndex === currentIndex) {
@ -574,11 +593,20 @@ function StringSplit(separator, limit) {
continue;
}
result[result.length] = match[1];
result[result.length] =
SubString(subject, currentIndex, lastMatchInfo[CAPTURE0]);
if (result.length === lim) return result;
for (var i = 2; i < match.length; i++) {
result[result.length] = match[i];
for (var i = 2; i < NUMBER_OF_CAPTURES(lastMatchInfo); i += 2) {
var start = lastMatchInfo[CAPTURE(i)];
var end = lastMatchInfo[CAPTURE(i + 1)];
if (start != -1 && end != -1) {
result[result.length] = SubString(subject,
lastMatchInfo[CAPTURE(i)],
lastMatchInfo[CAPTURE(i + 1)]);
} else {
result[result.length] = void 0;
}
if (result.length === lim) return result;
}
@ -588,32 +616,24 @@ function StringSplit(separator, limit) {
// ECMA-262 section 15.5.4.14
// Helper function used by split.
// Helper function used by split. This version returns the lastMatchInfo
// instead of allocating a new array with basically the same information.
function splitMatch(separator, subject, current_index, start_index) {
if (IS_REGEXP(separator)) {
var ovector = DoRegExpExec(separator, subject, start_index);
if (ovector == null) return null;
var nof_results = ovector.length >> 1;
var result = new $Array(nof_results + 1);
var lastMatchInfo = DoRegExpExec(separator, subject, start_index);
if (lastMatchInfo == null) return null;
// Section 15.5.4.14 paragraph two says that we do not allow zero length
// matches at the end of the string.
if (ovector[0] === subject.length) return null;
result[0] = ovector[1];
result[1] = subject.slice(current_index, ovector[0]);
for (var i = 1; i < nof_results; i++) {
var matching_start = ovector[2*i];
var matching_end = ovector[2*i + 1];
if (matching_start != -1 && matching_end != -1) {
result[i + 1] = subject.slice(matching_start, matching_end);
}
}
return result;
if (lastMatchInfo[CAPTURE0] === subject.length) return null;
return lastMatchInfo;
}
var separatorIndex = subject.indexOf(separator, start_index);
if (separatorIndex === -1) return null;
return [ separatorIndex + separator.length, subject.slice(current_index, separatorIndex) ];
reusableMatchInfo[CAPTURE0] = separatorIndex;
reusableMatchInfo[CAPTURE1] = separatorIndex + separator.length;
return reusableMatchInfo;
};

11
test/mjsunit/regexp-static.js
View File

@ -154,3 +154,14 @@ for (var i = 1; i <= 9; i++) {
}
assertEquals("", RegExp['$' + (i)], "$" + i);
}
RegExp.multiline = "foo";
assertTrue(typeof RegExp.multiline == typeof Boolean(), "RegExp.multiline coerces values to booleans");
RegExp.input = Number();
assertTrue(typeof RegExp.input == typeof String(), "RegExp.input coerces values to booleans");
// Ensure that we save the correct string as the last subject when
// we do a match on a sliced string (the top one not the underlying).
var foo = "lsdfj sldkfj sdklfj læsdfjl sdkfjlsdk fjsdl fjsdljskdj flsj flsdkj flskd regexp: /foobar/\nldkfj sdlkfj sdkl";
assertTrue(/^([a-z]+): (.*)/.test(foo.substring(foo.indexOf("regexp:"))), "regexp: setup");
assertEquals("regexp", RegExp.$1, "RegExp.$1");

51
test/mjsunit/regexp-string-methods.js Normal file
View File

@ -0,0 +1,51 @@
// Copyright 2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Regexp shouldn't use String.prototype.slice()
var s = new String("foo");
assertEquals("f", s.slice(0,1));
String.prototype.slice = function() { return "x"; }
assertEquals("x", s.slice(0,1));
assertEquals("g", /g/.exec("gg"));
// Regexp shouldn't use String.prototype.charAt()
var f1 = new RegExp("f", "i");
assertEquals("F", f1.exec("F"));
assertEquals("f", "foo".charAt(0));
String.prototype.charAt = function(idx) { return 'g'; };
assertEquals("g", "foo".charAt(0));
var f2 = new RegExp("[g]", "i");
assertEquals("G", f2.exec("G"));
assertTrue(f2.ignoreCase);
// On the other hand test is defined in a semi-coherent way as a call to exec.
// 15.10.6.3
// We match other browsers in using the original value of RegExp.prototype.exec.
// I.e., RegExp.prototype.test shouldn't use the current value of
// RegExp.prototype.exec.
RegExp.prototype.exec = function(string) { return 'x'; }
assertFalse(/f/.test('x'));

4
tools/js2c.py
View File

@ -104,7 +104,7 @@ def ExpandConstants(lines, constants):
def ExpandMacros(lines, macros):
for name, macro in macros.items():
start = lines.find(name, 0)
start = lines.find(name + '(', 0)
while start != -1:
# Scan over the arguments
assert lines[start + len(name)] == '('
@ -132,7 +132,7 @@ def ExpandMacros(lines, macros):
result = macro.expand(mapping)
# Replace the occurrence of the macro with the expansion
lines = lines[:start] + result + lines[end:]
start = lines.find(name, end)
start = lines.find(name + '(', end)
return lines
class TextMacro: