void VirtualValue::setTo(const Variant& value, StringCache& stringcache)
{
if ( value.isInt() )
{
setNumber(value.asInt());
}
else if ( value.isReal() )
{
setReal(value.asReal());
}
else if ( value.isBool() )
{
setBoolean(value.asBool());
}
else if ( value.isChar() )
{
setChar(value.asChar());
}
else if ( value.isString() )
{
setString(stringcache.lookup(value.asString()));
}
else
{
mKind = eEmpty;
}
}
void PnData::write(const Variant& value)
{
switch (value.getType()) {
case qpid::types::VAR_VOID:
pn_data_put_null(data);
break;
case qpid::types::VAR_BOOL:
pn_data_put_bool(data, value.asBool());
break;
case qpid::types::VAR_UINT64:
pn_data_put_ulong(data, value.asUint64());
break;
case qpid::types::VAR_INT64:
pn_data_put_long(data, value.asInt64());
break;
case qpid::types::VAR_DOUBLE:
pn_data_put_double(data, value.asDouble());
break;
case qpid::types::VAR_STRING:
pn_data_put_string(data, str(value.asString()));
break;
case qpid::types::VAR_MAP:
write(value.asMap());
break;
case qpid::types::VAR_LIST:
write(value.asList());
break;
default:
break;
}
}
bool JsAgent::onHandleReturn(const Variant& varRet) {
if(!varRet.isObject()) {
Debug::println("JsAgent::onHandleReturn> NPN_Invoke did not return an object");
return false;
}
NPObject* pReturn = varRet.asObject();
Variant varFlag;
if(!NPN_GetProperty(getNPP(), pReturn, methods.index0, varFlag.ptr())) {
Debug::println("JsAgent::onHandleReturn> ret[0] failed");
return false;
}
Variant varResult;
if(!NPN_GetProperty(getNPP(), pReturn, methods.index1, varResult.ptr())) {
Debug::println("JsAgent::onHandleReturn> ret[1] failed");
return false;
}
if(!varFlag.isBool()) {
Debug::println("JsAgent::onHandleReturn> flag was not bool");
return false;
}
ReturnMessage retMsg;
retMsg.isException = varFlag.asBool();
std::string strRet = varResult.toString(getNPP());
if(retMsg.isException) {
Debug::println("JsAgent::onHandleReturn> Exception: '%s'", strRet.c_str());
NPN_SetException(this, strRet.c_str());
}
else {
Debug::println("JsAgent::onHandleReturn> returned: %s", strRet.c_str());
}
if(!wrapLocalValue(varResult, retMsg.value)) {
Debug::println("JsAgent::onHandleReturn> wrapLocalValue() failed");
return false;
}
ArchiveWriter<Channel> ar(*m_channel);
if(!Message::send(retMsg, ar)) {
Debug::println("JsAgent::onHandleReturn> Message::send() failed");
return false;
}
return true;
}
bool JsAgent::wrapLocalValue(const Variant& var, JsValue& value) {
if(var.isInt()) {
value.tag = VT_Int;
value.intValue = var.asInt();
}
else if(var.isString()) {
value.tag = VT_String;
value.strValue = var.asString();
}
else if(var.isObject()) {
NPObject* pObject = var.asObject();
if(pObject->_class == GetNPClass<JsObjectWrapper>()) {
uint32_t id = 0;
value.tag = VT_Object;
value.intValue = id;
}
else {
uint32_t id = getRefId(pObject);
value.tag = VT_JsObject;
value.intValue = id;
}
}
else if(var.isNull()) {
value.tag = VT_Null;
}
else if(var.isBool()) {
value.tag = VT_Bool;
value.boolValue = var.asBool();
}
else if(var.isDouble()) {
value.tag = VT_Double;
value.doubleValue = var.asDouble();
}
else if(var.isVoid()) {
value.tag = VT_Void;
}
else {
return false;
}
return true;
}
void encode(const Variant& value, qpid::framing::Buffer& buffer)
{
switch (value.getType()) {
case VAR_VOID:
buffer.putOctet(0xf0);
break;
case VAR_BOOL:
buffer.putOctet(0x08);
buffer.putOctet(value.asBool());
break;
case VAR_INT8:
buffer.putOctet(0x01);
buffer.putInt8(value.asInt8());
break;
case VAR_UINT8:
buffer.putOctet(0x02);
buffer.putOctet(value.asUint8());
break;
case VAR_INT16:
buffer.putOctet(0x11);
buffer.putInt16(value.asInt16());
break;
case VAR_UINT16:
buffer.putOctet(0x12);
buffer.putShort(value.asUint16());
break;
case VAR_INT32:
buffer.putOctet(0x21);
buffer.putInt32(value.asInt32());
break;
case VAR_UINT32:
buffer.putOctet(0x22);
buffer.putLong(value.asUint32());
break;
case VAR_FLOAT:
buffer.putOctet(0x23);
buffer.putFloat(value.asFloat());
break;
case VAR_INT64:
buffer.putOctet(0x31);
buffer.putInt64(value.asInt64());
break;
case VAR_UINT64:
buffer.putOctet(0x32);
buffer.putLongLong(value.asUint64());
break;
case VAR_DOUBLE:
buffer.putOctet(0x33);
buffer.putDouble(value.asDouble());
break;
case VAR_UUID:
buffer.putOctet(0x48);
buffer.putBin128(value.asUuid().data());
break;
case VAR_MAP:
buffer.putOctet(0xa8);
encode(value.asMap(), encodedSize(value.asMap()), buffer);
break;
case VAR_LIST:
buffer.putOctet(0xa9);
encode(value.asList(), encodedSize(value.asList()), buffer);
break;
case VAR_STRING:
encode(value.getString(), value.getEncoding(), buffer);
break;
}
}
Variant& StackMachine::evaluate(const VariableStore& store, const FunctionRegistry& functions)
{
reset();
for(const auto& instruction : _instructions) {
switch(instruction._opCode) {
case NOP: {
break;
}
case PUSH: {
_valueStack.emplace(instruction._value);
break;
}
case PUSHVAR: {
if(instruction._value.getType() != INT) {
CSVSQLDB_THROW(StackMachineException, "expected an INT as variable index");
}
int64_t index = instruction._value.asInt();
_valueStack.emplace(store[static_cast<size_t>(index)]);
break;
}
case ADD:
case SUB:
case DIV:
case MOD:
case MUL:
case EQ:
case NEQ:
case IS:
case ISNOT:
case GT:
case GE:
case LT:
case LE:
case AND:
case OR:
case CONCAT: {
const Variant lhs(getNextValue());
Variant& rhs(getTopValue());
rhs = binaryOperation(mapOpCodeToBinaryOperationType(instruction._opCode), lhs, rhs);
break;
}
case NOT: {
Variant& rhs(getTopValue());
rhs = unaryOperation(OP_NOT, BOOLEAN, rhs);
break;
}
case PLUS: {
// this is a nop, as the value will not change, so just leave it on the stack
break;
}
case MINUS: {
Variant& rhs = getTopValue();
rhs = unaryOperation(OP_MINUS, rhs.getType(), rhs);
break;
}
case BETWEEN: {
const Variant lhs = getNextValue();
const Variant from = getNextValue();
Variant& to = getTopValue();
Variant result(BOOLEAN);
if(not(lhs.isNull() || from.isNull() || to.isNull())) {
if(binaryOperation(OP_GE, to, from).asBool()) {
result = binaryOperation(OP_GE, lhs, from);
if(result.asBool()) {
result = binaryOperation(OP_LE, lhs, to);
}
} else {
result = binaryOperation(OP_GE, lhs, to);
if(result.asBool()) {
result = binaryOperation(OP_LE, lhs, from);
}
}
}
to = result;
break;
}
case FUNC: {
if(instruction._value.getType() != STRING) {
CSVSQLDB_THROW(StackMachineException, "expected a string as variable name");
}
std::string funcname = instruction._value.asString();
Function::Ptr func = functions.getFunction(funcname);
if(!func) {
CSVSQLDB_THROW(StackMachineException, "function '" << funcname << "' not found");
}
Variants parameter;
size_t count = func->getParameterTypes().size();
for(const auto& param : func->getParameterTypes()) {
Variant v = getNextValue();
if(param != v.getType()) {
try {
v = unaryOperation(OP_CAST, param, v);
} catch(const std::exception&) {
CSVSQLDB_THROW(StackMachineException,
"calling function '" << funcname << "' with wrong parameter");
}
}
parameter.emplace(parameter.end(), v);
--count;
}
if(count) {
CSVSQLDB_THROW(StackMachineException, "too much parameters for function '" << funcname << "'");
}
_valueStack.emplace(func->call(parameter));
break;
}
case CAST: {
Variant& rhs = getTopValue();
rhs = unaryOperation(OP_CAST, instruction._value.getType(), rhs);
break;
}
case IN: {
size_t count = static_cast<size_t>(instruction._value.asInt());
const Variant lhs = getNextValue();
bool found(false);
for(size_t n = 0; n < count; ++n) {
Variant result = binaryOperation(OP_EQ, lhs, getNextValue());
if(result.asBool()) {
found = true;
++n;
for(; n < count; ++n) {
// remove rest of the values from stack
_valueStack.pop();
}
break;
}
}
if(found) {
_valueStack.emplace(Variant(true));
} else {
_valueStack.emplace(Variant(false));
}
break;
}
case LIKE: {
if(!instruction._r) {
CSVSQLDB_THROW(StackMachineException, "expected a regexp in LIKE expression");
}
Variant lhs = getTopValue();
if(lhs.getType() != STRING) {
lhs = unaryOperation(OP_CAST, STRING, lhs);
CSVSQLDB_THROW(StackMachineException, "can only do like operations on strings");
}
if(instruction._r->match(lhs.asString())) {
_valueStack.emplace(Variant(true));
} else {
_valueStack.emplace(Variant(false));
}
break;
}
}
}
return _valueStack.top();
}
