57 lines
1.1 KiB
C++
57 lines
1.1 KiB
C++
#ifndef INTCODE_HPP_
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#define INTCODE_HPP_
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#include <cstddef>
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#include <cstdint>
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#include <istream>
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#include <unordered_map>
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#include <variant>
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#include <vector>
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template <class... Ts> struct overloaded : Ts... { using Ts::operator()...; };
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template <class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
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namespace intcode {
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using value_type = std::int64_t;
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struct Input {
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value_type &pos;
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};
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struct Output {
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value_type val;
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};
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struct Halt {};
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class Machine {
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std::vector<value_type> rom_;
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std::unordered_map<std::size_t, value_type> ram_;
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std::size_t pc_;
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std::size_t base_;
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auto ref(value_type instruction, value_type p, std::size_t offset)
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-> value_type &;
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public:
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Machine();
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explicit Machine(std::vector<value_type> ram);
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auto step() -> std::variant<Input, Output, Halt>;
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auto at(std::size_t) -> value_type &;
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};
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struct BadInstruction : public std::exception {
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std::size_t pc;
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value_type instruction;
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explicit BadInstruction(std::size_t pc, value_type instruction);
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const char *what() const noexcept override;
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};
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auto parse_stream(std::istream &in) -> std::vector<value_type>;
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}
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#endif // INTCODE_HPP_
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