#include <intcode/Machine.hpp>

namespace intcode {

Machine::Machine() : rom_{}, ram_{}, pc_{0}, base_{0} {}

Machine::Machine(std::vector<ValueType> ram)
    : rom_{ram}, ram_{}, pc_{0}, base_{0} {}

auto Machine::At(std::size_t i) -> ValueType & {
  return i < rom_.size() ? rom_[i] : ram_[i];
}

auto Machine::Rel(std::size_t i) -> ValueType & {
  return At(base_ + i);
}

auto Machine::Rebase(std::size_t offset) -> void {
  base_ += offset;
}

auto Machine::Next() -> ValueType & {
  return At(pc_++);
}

auto Machine::Goto(std::size_t address) -> void {
  pc_ = address;
}

} // namespace