ScopedArgumentsTable.cpp [plain text]
#include "config.h"
#include "ScopedArgumentsTable.h"
#include "JSCInlines.h"
namespace JSC {
const ClassInfo ScopedArgumentsTable::s_info = { "ScopedArgumentsTable", 0, 0, CREATE_METHOD_TABLE(ScopedArgumentsTable) };
ScopedArgumentsTable::ScopedArgumentsTable(VM& vm)
: Base(vm, vm.scopedArgumentsTableStructure.get())
, m_length(0)
, m_locked(false)
{
}
ScopedArgumentsTable::~ScopedArgumentsTable()
{
}
void ScopedArgumentsTable::destroy(JSCell* cell)
{
static_cast<ScopedArgumentsTable*>(cell)->ScopedArgumentsTable::~ScopedArgumentsTable();
}
ScopedArgumentsTable* ScopedArgumentsTable::create(VM& vm)
{
ScopedArgumentsTable* result =
new (NotNull, allocateCell<ScopedArgumentsTable>(vm.heap)) ScopedArgumentsTable(vm);
result->finishCreation(vm);
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::create(VM& vm, uint32_t length)
{
ScopedArgumentsTable* result = create(vm);
result->m_length = length;
result->m_arguments = std::make_unique<ScopeOffset[]>(length);
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::clone(VM& vm)
{
ScopedArgumentsTable* result = create(vm, m_length);
for (unsigned i = m_length; i--;)
result->m_arguments[i] = m_arguments[i];
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::setLength(VM& vm, uint32_t newLength)
{
if (LIKELY(!m_locked)) {
std::unique_ptr<ScopeOffset[]> newArguments = std::make_unique<ScopeOffset[]>(newLength);
for (unsigned i = std::min(m_length, newLength); i--;)
newArguments[i] = m_arguments[i];
m_length = newLength;
m_arguments = WTF::move(newArguments);
return this;
}
ScopedArgumentsTable* result = create(vm, newLength);
for (unsigned i = std::min(m_length, newLength); i--;)
result->m_arguments[i] = m_arguments[i];
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::set(VM& vm, uint32_t i, ScopeOffset value)
{
ScopedArgumentsTable* result;
if (UNLIKELY(m_locked))
result = clone(vm);
else
result = this;
result->at(i) = value;
return result;
}
Structure* ScopedArgumentsTable::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
}
}