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-rw-r--r--2016/aoc12/Cargo.lock98
-rw-r--r--2016/aoc12/Cargo.toml7
-rw-r--r--2016/aoc12/input.txt23
-rw-r--r--2016/aoc12/src/main.rs136
4 files changed, 264 insertions, 0 deletions
diff --git a/2016/aoc12/Cargo.lock b/2016/aoc12/Cargo.lock
new file mode 100644
index 0000000..24237f4
--- /dev/null
+++ b/2016/aoc12/Cargo.lock
@@ -0,0 +1,98 @@
+[root]
+name = "aoc12"
+version = "0.1.0"
+dependencies = [
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+]
+
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+dependencies = [
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+]
+
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+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "thread-id 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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+
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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diff --git a/2016/aoc12/Cargo.toml b/2016/aoc12/Cargo.toml
new file mode 100644
index 0000000..f224921
--- /dev/null
+++ b/2016/aoc12/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "aoc12"
+version = "0.1.0"
+authors = ["Justin Worthe <justin.worthe@entelect.co.za>"]
+
+[dependencies]
+regex = "0.1" \ No newline at end of file
diff --git a/2016/aoc12/input.txt b/2016/aoc12/input.txt
new file mode 100644
index 0000000..bb2a2ff
--- /dev/null
+++ b/2016/aoc12/input.txt
@@ -0,0 +1,23 @@
+cpy 1 a
+cpy 1 b
+cpy 26 d
+jnz c 2
+jnz 1 5
+cpy 7 c
+inc d
+dec c
+jnz c -2
+cpy a c
+inc a
+dec b
+jnz b -2
+cpy c b
+dec d
+jnz d -6
+cpy 17 c
+cpy 18 d
+inc a
+dec d
+jnz d -2
+dec c
+jnz c -5
diff --git a/2016/aoc12/src/main.rs b/2016/aoc12/src/main.rs
new file mode 100644
index 0000000..2356402
--- /dev/null
+++ b/2016/aoc12/src/main.rs
@@ -0,0 +1,136 @@
+extern crate regex;
+use regex::Regex;
+
+use std::io::BufReader;
+use std::io::prelude::*;
+use std::fs::File;
+
+enum Instruction {
+ CpyLit(i32, usize),
+ CpyReg(usize, usize),
+ Inc(usize),
+ Dec(usize),
+ Jnz(usize, i32),
+ Jmp(i32),
+ Noop
+}
+
+impl Instruction {
+ fn parse(line: &str) -> Instruction {
+ let cpy_lit: Regex = Regex::new(r"cpy ([-\d]+) (a|b|c|d)").unwrap();
+ let cpy_reg = Regex::new(r"cpy (a|b|c|d) (a|b|c|d)").unwrap();
+ let inc = Regex::new(r"inc (a|b|c|d)").unwrap();
+ let dec = Regex::new(r"dec (a|b|c|d)").unwrap();
+ let jnz_lit = Regex::new(r"jnz ([-\d]+) ([-\d]+)").unwrap();
+ let jnz_reg = Regex::new(r"jnz (a|b|c|d) ([-\d]+)").unwrap();
+
+ let cpy_lit_match = cpy_lit.captures(line);
+ let cpy_reg_match = cpy_reg.captures(line);
+ let inc_match = inc.captures(line);
+ let dec_match = dec.captures(line);
+ let jnz_lit_match = jnz_lit.captures(line);
+ let jnz_reg_match = jnz_reg.captures(line);
+
+ if cpy_lit_match.is_some() {
+ let cap = cpy_lit_match.unwrap();
+ let src: i32 = cap.at(1).unwrap().parse().unwrap();
+ let dest = to_register_index(cap.at(2).unwrap());
+ Instruction::CpyLit(src, dest)
+ }
+ else if cpy_reg_match.is_some() {
+ let cap = cpy_reg_match.unwrap();
+ let src = to_register_index(cap.at(1).unwrap());
+ let dest = to_register_index(cap.at(2).unwrap());
+ Instruction::CpyReg(src, dest)
+ }
+ else if inc_match.is_some() {
+ let cap = inc_match.unwrap();
+ let dest = to_register_index(cap.at(1).unwrap());
+ Instruction::Inc(dest)
+ }
+ else if dec_match.is_some() {
+ let cap = dec_match.unwrap();
+ let dest = to_register_index(cap.at(1).unwrap());
+ Instruction::Dec(dest)
+ }
+ else if jnz_lit_match.is_some() {
+ let cap = jnz_lit_match.unwrap();
+ let condition: i32 = cap.at(1).unwrap().parse().unwrap();
+ let offset: i32 = cap.at(2).unwrap().parse().unwrap();
+ if condition != 0 {
+ Instruction::Jmp(offset)
+ }
+ else {
+ Instruction::Noop
+ }
+ }
+ else if jnz_reg_match.is_some() {
+ let cap = jnz_reg_match.unwrap();
+ let condition = to_register_index(cap.at(1).unwrap());
+ let offset: i32 = cap.at(2).unwrap().parse().unwrap();
+ Instruction::Jnz(condition, offset)
+ }
+ else {
+ panic!("Invalid instruction line")
+ }
+ }
+}
+
+fn main() {
+ let program = read_file();
+
+ let mut registers: [i32; 4] = [0, 0, 1, 0];
+ let mut pc: usize = 0;
+
+ while pc < program.len() {
+ let mut pc_next: usize = pc+1;
+
+ match program[pc] {
+ Instruction::CpyLit(src, dest) => {
+ registers[dest] = src;
+ },
+ Instruction::CpyReg(src, dest) => {
+ registers[dest] = registers[src];
+ },
+ Instruction::Inc(dest) => {
+ registers[dest] += 1;
+ },
+ Instruction::Dec(dest) => {
+ registers[dest] -= 1;
+ },
+ Instruction::Jnz(condition, offset) => {
+ if registers[condition] != 0 {
+ pc_next = (pc as i32 + offset) as usize;
+ }
+ },
+ Instruction::Jmp(offset) => {
+ pc_next = (pc as i32 + offset) as usize
+ },
+ Instruction::Noop => {}
+ }
+
+ pc = pc_next;
+ }
+
+ println!("a: {}, b: {}, c: {}, d: {}", registers[0], registers[1], registers[2], registers[3]);
+
+}
+
+fn to_register_index(name: &str) -> usize {
+ match name {
+ "a" => 0,
+ "b" => 1,
+ "c" => 2,
+ "d" => 3,
+ _ => panic!("Invalid register provided")
+ }
+}
+
+fn read_file() -> Vec<Instruction> {
+ let file = BufReader::new(File::open("input.txt").unwrap());
+ file.lines()
+ .map(|line| line.unwrap())
+ .filter(|line| line.len() > 0)
+ .map(|line| Instruction::parse(line.trim()))
+ .collect()
+}