horrid.cpp

uint16_t machine::get_val(const operand_t &x)
{
	switch (x.which()) {
		case 0: { // string
			// much sad here. duplicates a lot of get_operand
			std::string op = boost::get<std::string>(x);
			if (op.find('+') != std::string::npos) {
				size_t pos = op.find('+');
				return this->get_val(op.substr(0, pos)) + this->get_val(op.substr(pos + 1));
			} else if (op.size() > 2 && op.front() == '[' && op.back() == ']') {
				return this->mem.at(this->get_val(op.substr(1, op.length() - 2)));
			} else if (op.size() > 2 && op[0] == '0' && tolower(op[1]) == 'x' && is_hex(op.substr(2))) {
				return static_cast<uint16_t>(std::stoul(op.substr(2), nullptr, 16));
			} else if (std::find(REG_T_STR.begin(), REG_T_STR.end(), op) != REG_T_STR.end()) {
				return this->regs.at(static_cast<size_t>(find_reg(op)));
			}
			return this->find_label(op);
		}
		case 1: // reg
			return this->regs.at(static_cast<size_t>(boost::get<reg_t>(x)));
		case 2: // literal
			return boost::get<uint16_t>(x);
	}
	throw "Could not get value??";
}