JSString* JSValue::toStringSlowCase(ExecState* exec, bool returnEmptyStringOnError) const
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto errorValue = [&] () -> JSString* {
if (returnEmptyStringOnError)
return jsEmptyString(exec);
return nullptr;
};
ASSERT(!isString());
if (isInt32()) {
auto integer = asInt32();
if (static_cast<unsigned>(integer) <= 9)
return vm.smallStrings.singleCharacterString(integer + '0');
return jsNontrivialString(&vm, vm.numericStrings.add(integer));
}
if (isDouble())
return jsString(&vm, vm.numericStrings.add(asDouble()));
if (isTrue())
return vm.smallStrings.trueString();
if (isFalse())
return vm.smallStrings.falseString();
if (isNull())
return vm.smallStrings.nullString();
if (isUndefined())
return vm.smallStrings.undefinedString();
if (isSymbol()) {
throwTypeError(exec, scope, ASCIILiteral("Cannot convert a symbol to a string"));
return errorValue();
}
ASSERT(isCell());
JSValue value = asCell()->toPrimitive(exec, PreferString);
RETURN_IF_EXCEPTION(scope, errorValue());
ASSERT(!value.isObject());
JSString* result = value.toString(exec);
RETURN_IF_EXCEPTION(scope, errorValue());
return result;
}
void JSValue::dumpForBacktrace(PrintStream& out) const
{
if (!*this)
out.print("<JSValue()>");
else if (isInt32())
out.printf("%d", asInt32());
else if (isDouble())
out.printf("%lf", asDouble());
else if (isCell()) {
if (asCell()->inherits(JSString::info())) {
JSString* string = jsCast<JSString*>(asCell());
const StringImpl* impl = string->tryGetValueImpl();
if (impl)
out.print("\"", impl, "\"");
else
out.print("(unresolved string)");
} else if (asCell()->inherits(Structure::info())) {
out.print("Structure[ ", asCell()->structure()->classInfo()->className);
#if USE(JSVALUE64)
out.print(" ID: ", asCell()->structureID());
#endif
out.print("]: ", RawPointer(asCell()));
} else {
out.print("Cell[", asCell()->structure()->classInfo()->className);
#if USE(JSVALUE64)
out.print(" ID: ", asCell()->structureID());
#endif
out.print("]: ", RawPointer(asCell()));
}
} else if (isTrue())
out.print("True");
else if (isFalse())
out.print("False");
else if (isNull())
out.print("Null");
else if (isUndefined())
out.print("Undefined");
else
out.print("INVALID");
}
MessagePtr ProtobufCodec::parse(char *buf,int len)
{
MessagePtr message;
int32_t nameLen = asInt32(buf);
if(nameLen >=2 && nameLen <= len - kHeaderLen)
{
std::string typeName(buf + kHeaderLen,buf + kHeaderLen + nameLen -1);
//创建消息对象
message.reset(createMessage(typeName));
if(message)
{
const char *data = buf + kHeaderLen + nameLen;
int32_t dataLen = len - nameLen - 2*kHeaderLen;
//从Buffer中获取完整的消息格式
if(message->ParseFromArray(data,dataLen))
{
printf("解析消息成功\n");
}
}
}
return message;
}
char* JSValue::description()
{
static const size_t size = 32;
static char description[size];
if (isInt32())
snprintf(description, size, "Int32: %d", asInt32());
else if (isDouble())
snprintf(description, size, "Double: %lf", asDouble());
else if (isCell())
snprintf(description, size, "Cell: %p", asCell());
else if (isTrue())
snprintf(description, size, "True");
else if (isFalse())
snprintf(description, size, "False");
else if (isNull())
snprintf(description, size, "Null");
else {
ASSERT(isUndefined());
snprintf(description, size, "Undefined");
}
return description;
}
double JSValue::toIntegerPreserveNaN(ExecState* exec) const
{
if (isInt32())
return asInt32();
return trunc(toNumber(exec));
}
void JSValue::dumpInContextAssumingStructure(
PrintStream& out, DumpContext* context, Structure* structure) const
{
if (!*this)
out.print("<JSValue()>");
else if (isInt32())
out.printf("Int32: %d", asInt32());
else if (isDouble()) {
#if USE(JSVALUE64)
out.printf("Double: %lld, %lf", (long long)reinterpretDoubleToInt64(asDouble()), asDouble());
#else
union {
double asDouble;
uint32_t asTwoInt32s[2];
} u;
u.asDouble = asDouble();
out.printf("Double: %08x:%08x, %lf", u.asTwoInt32s[1], u.asTwoInt32s[0], asDouble());
#endif
} else if (isCell()) {
if (structure->classInfo()->isSubClassOf(JSString::info())) {
JSString* string = jsCast<JSString*>(asCell());
out.print("String");
if (string->isRope())
out.print(" (rope)");
const StringImpl* impl = string->tryGetValueImpl();
if (impl) {
if (impl->isAtomic())
out.print(" (atomic)");
if (impl->isAtomic())
out.print(" (identifier)");
if (impl->isSymbol())
out.print(" (symbol)");
} else
out.print(" (unresolved)");
out.print(": ", impl);
} else if (structure->classInfo()->isSubClassOf(Symbol::info()))
out.print("Symbol: ", RawPointer(asCell()));
else if (structure->classInfo()->isSubClassOf(Structure::info()))
out.print("Structure: ", inContext(*jsCast<Structure*>(asCell()), context));
else if (structure->classInfo()->isSubClassOf(JSObject::info())) {
out.print("Object: ", RawPointer(asCell()));
out.print(" with butterfly ", RawPointer(asObject(asCell())->butterfly()));
out.print(" (", inContext(*structure, context), ")");
} else {
out.print("Cell: ", RawPointer(asCell()));
out.print(" (", inContext(*structure, context), ")");
}
#if USE(JSVALUE64)
out.print(", ID: ", asCell()->structureID());
#endif
} else if (isTrue())
out.print("True");
else if (isFalse())
out.print("False");
else if (isNull())
out.print("Null");
else if (isUndefined())
out.print("Undefined");
else
out.print("INVALID");
}
ValueKey Value::key() const
{
switch (opcode()) {
case FramePointer:
return ValueKey(opcode(), type());
case Identity:
case Abs:
case Ceil:
case Sqrt:
case SExt8:
case SExt16:
case SExt32:
case ZExt32:
case Clz:
case Trunc:
case IToD:
case FloatToDouble:
case DoubleToFloat:
case Check:
case BitwiseCast:
case Neg:
return ValueKey(opcode(), type(), child(0));
case Add:
case Sub:
case Mul:
case Div:
case Mod:
case ChillDiv:
case ChillMod:
case BitAnd:
case BitOr:
case BitXor:
case Shl:
case SShr:
case ZShr:
case Equal:
case NotEqual:
case LessThan:
case GreaterThan:
case Above:
case Below:
case AboveEqual:
case BelowEqual:
case EqualOrUnordered:
case CheckAdd:
case CheckSub:
case CheckMul:
return ValueKey(opcode(), type(), child(0), child(1));
case Select:
return ValueKey(opcode(), type(), child(0), child(1), child(2));
case Const32:
return ValueKey(Const32, type(), static_cast<int64_t>(asInt32()));
case Const64:
return ValueKey(Const64, type(), asInt64());
case ConstDouble:
return ValueKey(ConstDouble, type(), asDouble());
case ConstFloat:
return ValueKey(ConstFloat, type(), asFloat());
case ArgumentReg:
return ValueKey(
ArgumentReg, type(),
static_cast<int64_t>(as<ArgumentRegValue>()->argumentReg().index()));
default:
return ValueKey();
}
}
Variant::operator int32_t() const { return asInt32(); }
inline operator int32_t() const { return asInt32(); }
