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Cleanup - removing the overhead that my rust brain wants to add.

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This commit is contained in:
Firewire
2025-12-01 03:09:53 -05:00
parent 23e3872453
commit 5d5d24168c
2 changed files with 32 additions and 108 deletions
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66
src/day1/p1/main.cpp
View File

@@ -61,86 +61,48 @@
#include <iostream>
#include <string>
#include <vector>
#include <fstream>
#include <expected>
#include <memory>
struct instruction {
// Left = false
// Right = true
bool dir;
int number;
};
auto get_dir(const std::string& line) -> std::expected<bool, std::string> {
bool get_dir(const std::string& line) {
if (line.find('R') != std::string::npos) {
return true;
} else if (line.find('L') != std::string::npos) {
return false;
} else {
return std::unexpected("ERROR: Failed to read direction | " + line);
std::cerr << "ERROR: Failed to read direction | " << line << std::endl;
exit(1);
}
}
auto get_number(const std::string& line) -> std::expected<int, std::string> {
int get_number(const std::string& line) {
const std::string number = line.substr(1, line.size());
int ret;
try {
ret = std::stoi(number);
} catch (const std::invalid_argument& e) {
return std::unexpected("ERROR: Number was an invalid argument | " + number + " | " + e.what());
std::cerr << "ERROR: Number was an invalid argument | " << number << " | " << e.what() << std::endl;
exit(1);
} catch (const std::out_of_range& e) {
return std::unexpected("ERROR: Number out of range | " + number + " | " + e.what());
std::cerr << "ERROR: Number was out of range | " << number << " | " << e.what() << std::endl;
exit(1);
}
return ret;
}
auto parse_line(const std::string& line) -> std::expected<instruction, std::string> {
instruction ins{};
if (const auto dir = get_dir(line); dir.has_value()) {
ins.dir = dir.value();
} else {
return std::unexpected(dir.error());
}
if (const auto number = get_number(line); number.has_value()) {
ins.number = number.value();
} else {
return std::unexpected(number.error());
}
return ins;
}
auto parse(const std::string& filename) -> std::expected<std::vector<instruction>, std::string> {
std::ifstream stream(filename);
std::string line;
std::vector<instruction> instructions;
while (std::getline(stream, line)) {
if (const auto temp = parse_line(line); temp.has_value()) {
instructions.push_back(temp.value());
} else {
return std::unexpected("Failed to parse file | " + filename + " | " + temp.error());
}
}
return instructions;
}
int rotate (const int state, const bool direction, const int number) {
if (direction) { return (state + 100 + number) % 100; } else { return (state + 100 - number) % 100; }
}
int main() {
std::vector<instruction> instructions;
if (auto temp = parse("input/day1/p1.txt")) {
instructions = temp.value();
} else {
std::cerr << temp.error() << std::endl;
}
std::ifstream stream("input/day1/p1.txt");
std::string line;
int state = 50;
int password = 0;
for (auto [dir, number] : instructions) {
state = rotate(state, dir, number);
while (std::getline(stream, line)) {
state = rotate(state, get_dir(line), get_number(line));
if (state == 0) {
password++;
}

72
src/day1/p2/main.cpp
View File

@@ -94,70 +94,36 @@
#include <iostream>
#include <string>
#include <vector>
#include <fstream>
#include <expected>
#include <vector>
struct instruction {
// Left = false
// Right = true
bool dir;
int number;
};
auto get_dir(const std::string& line) -> std::expected<bool, std::string> {
bool get_dir(const std::string& line) {
if (line.find('R') != std::string::npos) {
return true;
} else if (line.find('L') != std::string::npos) {
return false;
} else {
return std::unexpected("ERROR: Failed to read direction | " + line);
}
if (line.find('L') != std::string::npos) {
return false;
}
std::cerr << "ERROR: Failed to read direction | " << line << std::endl;
exit(1);
}
auto get_number(const std::string& line) -> std::expected<int, std::string> {
int get_number(const std::string& line) {
const std::string number = line.substr(1, line.size());
int ret;
try {
ret = std::stoi(number);
} catch (const std::invalid_argument& e) {
return std::unexpected("ERROR: Number was an invalid argument | " + number + " | " + e.what());
std::cerr << "ERROR: Number was an invalid argument | " << number << " | " << e.what() << std::endl;
exit(1);
} catch (const std::out_of_range& e) {
return std::unexpected("ERROR: Number out of range | " + number + " | " + e.what());
std::cerr << "ERROR: Number was out of range | " << number << " | " << e.what() << std::endl;
exit(1);
}
return ret;
}
auto parse_line(const std::string& line) -> std::expected<instruction, std::string> {
instruction ins{};
if (const auto dir = get_dir(line); dir.has_value()) {
ins.dir = dir.value();
} else {
return std::unexpected(dir.error());
}
if (const auto number = get_number(line); number.has_value()) {
ins.number = number.value();
} else {
return std::unexpected(number.error());
}
return ins;
}
auto parse(const std::string& filename) -> std::expected<std::vector<instruction>, std::string> {
std::ifstream stream(filename);
std::string line;
std::vector<instruction> instructions;
while (std::getline(stream, line)) {
if (const auto temp = parse_line(line); temp.has_value()) {
instructions.push_back(temp.value());
} else {
return std::unexpected("Failed to parse file | " + filename + " | " + temp.error());
}
}
return instructions;
}
std::tuple<int, int> rotate (const int state, const bool direction, const int number, const int password) {
int new_password = password + (number / 100);
const int remainder = number % 100;
@@ -174,17 +140,13 @@ auto parse(const std::string& filename) -> std::expected<std::vector<instruction
}
int main() {
std::vector<instruction> instructions;
if (auto temp = parse("input/day1/p1.txt")) {
instructions = temp.value();
} else {
std::cerr << temp.error() << std::endl;
}
std::ifstream stream("input/day1/p1.txt");
std::string line;
int state = 50;
int password = 0;
for (auto [dir, number] : instructions) {
std::tuple<int, int> temp = rotate(state, dir, number, password);
while (std::getline(stream, line)) {
std::tuple<int, int> temp = rotate(state, get_dir(line), get_number(line), password);
state = std::get<0>(temp);
password = std::get<1>(temp);
}