aoc2024: implement day1 solution

userspace/CMakeLists.txt

@@ -1,6 +1,7 @@
 add_custom_target(userspace)
 
 #add_subdirectory(aoc2023)
+#add_subdirectory(aoc2024)
 add_subdirectory(libraries)
 add_subdirectory(programs)
 add_subdirectory(tests)

userspace/aoc2024/CMakeLists.txt

@@ -0,0 +1,23 @@
+set(AOC2024_PROJECTS
+	day1
+	full
+)
+
+set(BANAN_AOC2024_BIN   ${CMAKE_INSTALL_BINDIR}/aoc2024)
+set(BANAN_AOC2024_INPUT ${BANAN_SHARE}/aoc2024)
+
+set(CMAKE_INSTALL_BINDIR ${BANAN_AOC2024_BIN})
+
+add_custom_target(aoc2024)
+
+file(GLOB_RECURSE input_files "input/*")
+foreach(file ${input_files})
+	install(FILES ${file} DESTINATION ${BANAN_AOC2024_INPUT})
+endforeach()
+
+foreach(AOC2024_PROJECT ${AOC2024_PROJECTS})
+	add_subdirectory(${AOC2024_PROJECT})
+	add_dependencies(aoc2024 aoc2024_${AOC2024_PROJECT})
+endforeach()
+
+add_dependencies(userspace aoc2024)

userspace/aoc2024/day-template/CMakeLists.txt

@@ -0,0 +1,9 @@
+set(SOURCES
+	main.cpp
+)
+
+add_executable(aoc2024_day-template ${SOURCES})
+banan_include_headers(aoc2024_day-template ban)
+banan_link_library(aoc2024_day-template libc)
+
+install(TARGETS aoc2024_day-template OPTIONAL)

userspace/aoc2024/day-template/main.cpp

@@ -0,0 +1,47 @@
+#include <inttypes.h>
+#include <stdio.h>
+
+using i8  = int8_t;
+using i16 = int16_t;
+using i32 = int32_t;
+using i64 = int64_t;
+
+using u8  = uint8_t;
+using u16 = uint16_t;
+using u32 = uint32_t;
+using u64 = uint64_t;
+
+i64 part1(FILE* fp)
+{
+	(void)fp;
+	return -1;
+}
+
+i64 part2(FILE* fp)
+{
+	(void)fp;
+	return -1;
+}
+
+int main(int argc, char** argv)
+{
+	const char* file_path = "/usr/share/aoc2024/day-template_input.txt";
+
+	if (argc >= 2)
+		file_path = argv[1];
+
+	FILE* fp = fopen(file_path, "r");
+	if (fp == nullptr)
+	{
+		perror("fopen");
+		return 1;
+	}
+
+	printf("part1: %" PRId64 "\n", part1(fp));
+
+	fseek(fp, 0, SEEK_SET);
+
+	printf("part2: %" PRId64 "\n", part2(fp));
+
+	fclose(fp);
+}

userspace/aoc2024/day1/CMakeLists.txt

@@ -0,0 +1,9 @@
+set(SOURCES
+	main.cpp
+)
+
+add_executable(aoc2024_day1 ${SOURCES})
+banan_include_headers(aoc2024_day1 ban)
+banan_link_library(aoc2024_day1 libc)
+
+install(TARGETS aoc2024_day1 OPTIONAL)

userspace/aoc2024/day1/main.cpp

@@ -0,0 +1,101 @@
+#include <BAN/HashMap.h>
+#include <BAN/Vector.h>
+#include <BAN/Sort.h>
+
+#include <inttypes.h>
+#include <stdio.h>
+
+using i8  = int8_t;
+using i16 = int16_t;
+using i32 = int32_t;
+using i64 = int64_t;
+
+using u8  = uint8_t;
+using u16 = uint16_t;
+using u32 = uint32_t;
+using u64 = uint64_t;
+
+i64 part1(FILE* fp)
+{
+	BAN::Vector<i64> lhs;
+	BAN::Vector<i64> rhs;
+
+	for (;;) {
+		i64 l, r;
+		if (fscanf(fp, "%" SCNd64 " %" SCNd64 "\n", &l, &r) != 2)
+			break;
+		MUST(lhs.push_back(l));
+		MUST(rhs.push_back(r));
+	}
+
+	BAN::sort::sort(lhs.begin(), lhs.end());
+	BAN::sort::sort(rhs.begin(), rhs.end());
+
+	i64 result = 0;
+	for (size_t i = 0; i < lhs.size(); i++)
+		result += BAN::Math::abs(lhs[i] - rhs[i]);
+
+	return result;
+}
+
+i64 part2(FILE* fp)
+{
+	BAN::HashMap<i64, i64> lhs;
+	BAN::HashMap<i64, i64> rhs;
+
+	for (;;) {
+		i64 l, r;
+		if (fscanf(fp, "%" SCNd64 " %" SCNd64 "\n", &l, &r) != 2)
+			break;
+
+		{
+			auto it = lhs.find(l);
+			if (it == lhs.end())
+				MUST(lhs.insert(l, 1));
+			else
+				it->value++;
+		}
+
+		{
+			auto it = rhs.find(r);
+			if (it == rhs.end())
+				MUST(rhs.insert(r, 1));
+			else
+				it->value++;
+		}
+	}
+
+	i64 result = 0;
+
+	for (auto [id, count] : lhs) {
+		auto it = rhs.find(id);
+		if (it == rhs.end())
+			continue;
+		result += id * count * it->value;
+	}
+
+	return result;
+}
+
+int main(int argc, char** argv)
+{
+	const char* file_path = "/usr/share/aoc2024/day1_input.txt";
+
+	if (argc >= 2)
+		file_path = argv[1];
+
+	FILE* fp = fopen(file_path, "r");
+	if (fp == nullptr)
+	{
+		perror("fopen");
+		return 1;
+	}
+
+	printf("part1: %" PRId64 "\n", part1(fp));
+
+	fseek(fp, 0, SEEK_SET);
+
+	printf("part2: %" PRId64 "\n", part2(fp));
+
+	fclose(fp);
+}

userspace/aoc2024/full/CMakeLists.txt

@@ -0,0 +1,9 @@
+set(SOURCES
+	main.cpp
+)
+
+add_executable(aoc2024_full ${SOURCES})
+banan_include_headers(aoc2024_full ban)
+banan_link_library(aoc2024_full libc)
+
+install(TARGETS aoc2024_full OPTIONAL)

userspace/aoc2024/full/main.cpp

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+int main()
+{
+	for (int i = 1; i <= 25; i++)
+	{
+		char command[128];
+		sprintf(command, "/bin/aoc2024/day%d", i);
+
+		struct stat st;
+		if (stat(command, &st) == -1)
+			continue;
+
+		printf("day%d\n", i);
+
+		system(command);
+	}
+
+	return 0;
+}

userspace/aoc2024/init-day.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+if [[ -z $1 ]]; then
+	echo Please specify day number >& 2
+	exit 1
+fi
+
+if [[ ! -d day$1 ]]; then
+	cp -r day-template day$1
+	sed -i "s/day-template/day$1/g" day$1/*
+fi
+
+if [[ ! -f input/day$1_input.txt ]]; then
+	wget --no-cookies --header "Cookie: session=$AOC_SESSION" https://adventofcode.com/2024/day/$1/input -O input/day$1_input.txt
+fi

userspace/aoc2024/input/.gitignore

@@ -0,0 +1 @@
+day*_input.txt