RegExpCachedResult.cpp [plain text]
#include "config.h"
#include "RegExpCachedResult.h"
#include "RegExpCache.h"
#include "RegExpMatchesArray.h"
namespace JSC {
void RegExpCachedResult::visitAggregate(SlotVisitor& visitor)
{
visitor.append(m_lastInput);
visitor.append(m_lastRegExp);
if (m_reified) {
visitor.append(m_reifiedInput);
visitor.append(m_reifiedResult);
visitor.append(m_reifiedLeftContext);
visitor.append(m_reifiedRightContext);
}
}
JSArray* RegExpCachedResult::lastResult(JSGlobalObject* globalObject, JSObject* owner)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (!m_reified) {
m_reifiedInput.set(vm, owner, m_lastInput.get());
if (!m_lastRegExp)
m_lastRegExp.set(vm, owner, vm.regExpCache()->ensureEmptyRegExp(vm));
JSArray* result = nullptr;
if (m_result)
result = createRegExpMatchesArray(globalObject, m_lastInput.get(), m_lastRegExp.get(), m_result.start);
else
result = createEmptyRegExpMatchesArray(globalObject, m_lastInput.get(), m_lastRegExp.get());
RETURN_IF_EXCEPTION(scope, nullptr);
m_reifiedResult.setWithoutWriteBarrier(result);
m_reifiedLeftContext.clear();
m_reifiedRightContext.clear();
m_reified = true;
vm.heap.writeBarrier(owner);
}
return m_reifiedResult.get();
}
JSString* RegExpCachedResult::leftContext(JSGlobalObject* globalObject, JSObject* owner)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
lastResult(globalObject, owner);
RETURN_IF_EXCEPTION(scope, nullptr);
if (!m_reifiedLeftContext) {
JSString* leftContext = jsSubstring(globalObject, m_reifiedInput.get(), 0, m_result.start);
RETURN_IF_EXCEPTION(scope, nullptr);
m_reifiedLeftContext.set(vm, owner, leftContext);
}
return m_reifiedLeftContext.get();
}
JSString* RegExpCachedResult::rightContext(JSGlobalObject* globalObject, JSObject* owner)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
lastResult(globalObject, owner);
RETURN_IF_EXCEPTION(scope, nullptr);
if (!m_reifiedRightContext) {
unsigned length = m_reifiedInput->length();
JSString* rightContext = jsSubstring(globalObject, m_reifiedInput.get(), m_result.end, length - m_result.end);
RETURN_IF_EXCEPTION(scope, nullptr);
m_reifiedRightContext.set(vm, owner, rightContext);
}
return m_reifiedRightContext.get();
}
void RegExpCachedResult::setInput(JSGlobalObject* globalObject, JSObject* owner, JSString* input)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
lastResult(globalObject, owner);
RETURN_IF_EXCEPTION(scope, void());
leftContext(globalObject, owner);
RETURN_IF_EXCEPTION(scope, void());
rightContext(globalObject, owner);
RETURN_IF_EXCEPTION(scope, void());
ASSERT(m_reified);
m_reifiedInput.set(vm, owner, input);
}
}