make a common lib for non-intcode problems

This commit is contained in:
2022-11-06 21:12:30 -08:00
parent 041c055f43
commit ebb068cfc5
24 changed files with 131 additions and 42 deletions

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@@ -1,2 +1,2 @@
add_library(intcode src/Coord.cpp src/Parser.cpp src/Interpreter.cpp src/Machine.cpp src/Startup.cpp)
target_include_directories(intcode PUBLIC include)
add_library(aocpp src/Startup.cpp src/Coord.cpp)
target_include_directories(aocpp PUBLIC include)

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@@ -1,7 +0,0 @@
#ifndef OVERLOAD_HPP_
#define OVERLOAD_HPP_
template <class... Ts> struct overloaded : Ts... { using Ts::operator()...; };
template <class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
#endif

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@@ -1,14 +1,12 @@
#ifndef INTCODE_COORD_HPP_
#define INTCODE_COORD_HPP_
#ifndef AOCPP_COORD_HPP_
#define AOCPP_COORD_HPP_
#include <functional>
#include <map>
#include <ostream>
#include <tuple>
#include <intcode/Machine.hpp>
namespace intcode {
namespace aocpp {
/// Cartesian coordinate
///
@@ -19,7 +17,7 @@ struct Coord {
};
auto Draw(std::ostream & out, std::map<Coord, ValueType> image) -> void;
auto Draw(std::ostream & out, std::map<Coord, std::int64_t> image) -> void;
/// Move one unit up
auto Up(Coord) -> Coord;
@@ -60,9 +58,9 @@ auto operator<<(std::ostream &, Coord) -> std::ostream &;
} // namespace
template<>
struct std::hash<intcode::Coord>
struct std::hash<aocpp::Coord>
{
auto operator()(intcode::Coord const& c) const noexcept -> std::size_t {
auto operator()(aocpp::Coord const& c) const noexcept -> std::size_t {
std::hash<std::int64_t> h;
return h(c.x) ^ h(c.y);
}

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@@ -0,0 +1,10 @@
#ifndef AOCPP_STARTUP_HPP_
#define AOCPP_STARTUP_HPP_
#include <fstream>
namespace aocpp {
auto Startup(int argc, char ** argv) -> std::ifstream;
}
#endif

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@@ -1,51 +0,0 @@
#ifndef INTCODE_INTERPRETER_HPP_
#define INTCODE_INTERPRETER_HPP_
#include <variant>
#include <concepts>
#include <intcode/Machine.hpp>
#include <Overload.hpp>
namespace intcode {
struct Input {
ValueType &input;
};
struct Output {
ValueType output;
};
struct Halt {};
auto StepInput(Machine & m, ValueType input) -> void;
auto StepOutput(Machine & m) -> ValueType;
auto Step(Machine & m) -> std::variant<Input, Output, Halt>;
struct BadInstruction : public std::runtime_error {
explicit BadInstruction(char const* what);
};
template <std::invocable<ValueType&> Fin, std::invocable<ValueType> Fout, std::invocable<> Fhalt>
auto Advance(Machine & machine, Fin input, Fout output, Fhalt halt) {
return std::visit(overloaded{
[&](Halt) { return halt(); },
[&](Input i) { return input(i.input); },
[&](Output o) { return output(o.output); },
}, Step(machine));
}
template <std::invocable<> Fin, std::invocable<ValueType> Fout>
auto Run(Machine & machine, Fin input, Fout output) -> void {
while (Advance(machine,
[&](ValueType &i) { i = input(); return true; },
[&](ValueType o) { output(o); return true; },
[]() { return false; }
)) {}
}
} // namespace
#endif

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@@ -1,39 +0,0 @@
#ifndef INTCODE_MACHINE_HPP_
#define INTCODE_MACHINE_HPP_
#include <cstddef>
#include <unordered_map>
#include <vector>
namespace intcode {
using ValueType = std::int64_t;
class Machine {
std::vector<ValueType> rom_;
std::unordered_map<std::size_t, ValueType> ram_;
std::size_t pc_;
std::size_t base_;
public:
Machine();
explicit Machine(std::vector<ValueType> ram);
/// Access memory at absolute address
/// @param address
/// @return reference to memory at given address
auto At(std::size_t address) -> ValueType &;
/// Access memory at address relative to base pointer
/// @param offset from base pointer
/// @return reference to memory at given offset
auto Rel(std::size_t offset) -> ValueType &;
auto Next() -> ValueType &;
auto Goto(std::size_t address) -> void;
auto Rebase(std::size_t offset) -> void;
};
} // namespace
#endif

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@@ -1,15 +0,0 @@
#ifndef INTCODE_PARSER_HPP_
#define INTCODE_PARSER_HPP_
#include <istream>
#include <vector>
#include "Machine.hpp"
namespace intcode {
auto ParseStream(std::istream &in) -> std::vector<ValueType>;
} // namespace
#endif

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@@ -1,10 +0,0 @@
#ifndef INTCODE_INTCODE_HPP_
#define INTCODE_INTCODE_HPP_
#include <intcode/Interpreter.hpp>
#include <intcode/Machine.hpp>
#include <intcode/Parser.hpp>
#include <intcode/Startup.hpp>
#include <Overload.hpp>
#endif

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@@ -1,9 +1,9 @@
#include <intcode/Coord.hpp>
#include <aocpp/Coord.hpp>
namespace intcode {
namespace aocpp {
auto Draw(std::ostream & out, std::map<Coord, ValueType> image) -> void {
ValueType minX = 0, maxX = 0, minY = 0, maxY = 0;
auto Draw(std::ostream & out, std::map<Coord, std::int64_t> image) -> void {
std::int64_t minX = 0, maxX = 0, minY = 0, maxY = 0;
for (auto&& [k, _] : image) {
auto [x,y] = k;
minX = std::min(minX, x);
@@ -11,8 +11,8 @@ auto Draw(std::ostream & out, std::map<Coord, ValueType> image) -> void {
minY = std::min(minY, y);
maxY = std::max(maxY, y);
}
for (ValueType y = minY; y <= maxY; y++) {
for (ValueType x = minX; x <= maxX; x++) {
for (std::int64_t y = minY; y <= maxY; y++) {
for (std::int64_t x = minX; x <= maxX; x++) {
auto it = image.find({x,y});
if (image.end() == it) {
out << "";

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@@ -1,93 +0,0 @@
#include <intcode/Interpreter.hpp>
namespace intcode {
BadInstruction::BadInstruction(char const* what)
: std::runtime_error{what} {}
auto StepInput(Machine & m, ValueType input) -> void {
std::get<Input>(Step(m)).input = input;
}
auto StepOutput(Machine & m) -> ValueType {
return std::get<Output>(Step(m)).output;
}
auto Step(Machine & m) -> std::variant<Input, Output, Halt> {
for (;;) {
auto instruction = m.Next();
auto modes = instruction / 10;
auto arg = [&]() -> ValueType & {
auto &v = m.Next();
switch ((modes /= 10) % 10) {
case 0:
return m.At(v);
case 1:
return v;
case 2:
return m.Rel(v);
default:
throw BadInstruction{"invalid addressing mode"};
}
};
switch (instruction % 100) {
case 1: {
arg() = arg() + arg();
break;
}
case 2: {
arg() = arg() * arg();
break;
}
case 3: {
return Input{arg()};
}
case 4: {
return Output{arg()};
}
case 5: {
auto a = arg();
auto b = arg();
if (a) { m.Goto(b); }
break;
}
case 6: {
auto a = arg();
auto b = arg();
if (!a) { m.Goto(b); }
break;
}
case 7: {
auto a = arg();
auto b = arg();
arg() = a < b; // order matters
break;
}
case 8: {
arg() = arg() == arg();
break;
}
case 9:
m.Rebase(arg());
break;
case 99:
return Halt{};
default:
throw BadInstruction{"invalid opcode"};
}
}
}
} // namespace

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@@ -1,30 +0,0 @@
#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

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@@ -1,17 +0,0 @@
#include <intcode/Parser.hpp>
#include <iostream>
namespace intcode {
auto ParseStream(std::istream &in) -> std::vector<ValueType> {
ValueType x;
std::string str;
std::vector<ValueType> result;
while (std::getline(in, str, ',')) {
result.push_back(std::stol(str));
}
return result;
}
} // namespace

17
lib/src/Startup.cpp Normal file
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@@ -0,0 +1,17 @@
#include <aocpp/Startup.hpp>
#include <cstdlib>
#include <iostream>
#include <fstream>
namespace aocpp {
auto Startup(int argc, char ** argv) -> std::ifstream {
if (argc != 2) {
std::cerr << "Expected input file argument\n";
exit(EXIT_FAILURE);
}
return std::ifstream{argv[1]};
}
}