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author | June McEnroe <june@causal.agency> | 2018-12-21 04:43:55 -0500 |
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committer | June McEnroe <june@causal.agency> | 2018-12-21 04:43:55 -0500 |
commit | d66d79fc2dc3bf9bfcf36671a2677a05f1cc9d7c (patch) | |
tree | 2ab59de6e646a1396fd6207b59e21b7cad706d2d | |
parent | Solve day 18 part 2 (diff) | |
download | aoc-d66d79fc2dc3bf9bfcf36671a2677a05f1cc9d7c.tar.gz aoc-d66d79fc2dc3bf9bfcf36671a2677a05f1cc9d7c.zip |
Solve day 19 part 1
-rw-r--r-- | 2018/day19.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/2018/day19.c b/2018/day19.c new file mode 100644 index 0000000..5802ffa --- /dev/null +++ b/2018/day19.c @@ -0,0 +1,112 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +typedef unsigned uint; + +struct CPU { + uint ip; + uint r[6]; +}; + +typedef struct CPU Op(struct CPU, uint, uint, uint); + +static struct CPU addr(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] + cpu.r[b]; return cpu; +} +static struct CPU addi(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] + b; return cpu; +} +static struct CPU mulr(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] * cpu.r[b]; return cpu; +} +static struct CPU muli(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] * b; return cpu; +} +static struct CPU banr(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] & cpu.r[b]; return cpu; +} +static struct CPU bani(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] & b; return cpu; +} +static struct CPU borr(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] | cpu.r[b]; return cpu; +} +static struct CPU bori(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] | b; return cpu; +} +static struct CPU setr(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a]; return cpu; +} +static struct CPU seti(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = a; return cpu; +} +static struct CPU gtir(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = a > cpu.r[b]; return cpu; +} +static struct CPU gtri(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] > b; return cpu; +} +static struct CPU gtrr(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] > cpu.r[b]; return cpu; +} +static struct CPU eqir(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = a == cpu.r[b]; return cpu; +} +static struct CPU eqri(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] == b; return cpu; +} +static struct CPU eqrr(struct CPU cpu, uint a, uint b, uint c) { + cpu.r[c] = cpu.r[a] == cpu.r[b]; return cpu; +} + +static const struct { + const char *name; + Op *fn; +} Ops[16] = { + { "addr", addr }, + { "addi", addi }, + { "mulr", mulr }, + { "muli", muli }, + { "banr", banr }, + { "bani", bani }, + { "borr", borr }, + { "bori", bori }, + { "setr", setr }, + { "seti", seti }, + { "gtir", gtir }, + { "gtri", gtri }, + { "gtrr", gtrr }, + { "eqir", eqir }, + { "eqri", eqri }, + { "eqrr", eqrr }, +}; + +int main(void) { + struct CPU cpu = { .r = { 0, 0, 0, 0, 0, 0 } }; + scanf("#ip %u\n", &cpu.ip); + + uint len = 0; + struct Ins { + char op[4]; + uint a, b, c; + } prog[50]; + while (!feof(stdin)) { + scanf( + "%4c %u %u %u\n", + prog[len].op, &prog[len].a, &prog[len].b, &prog[len].c + ); + len++; + } + + while (cpu.r[cpu.ip] < len) { + struct Ins ins = prog[cpu.r[cpu.ip]]; + for (uint i = 0; i < 16; ++i) { + if (strncmp(ins.op, Ops[i].name, 4)) continue; + cpu = Ops[i].fn(cpu, ins.a, ins.b, ins.c); + cpu.r[cpu.ip]++; + break; + } + } + printf("%u\n", cpu.r[0]); +} |