Puzzle 5: Add `-p` option to choose part 1/2 solution

Like the later puzzles

1 files changed, 17 insertions, 1 deletions

diff --git a/5.c b/5.c
index 993c555..df7c8bd 100644
--- a/5.c
+++ b/5.c
@@ -119,8 +119,24 @@ main(int argc, char ** argv)
 	struct crate ** stack = NULL;
 	regex_t movecmd;
 
-	while ((i = getopt(argc, argv, "m:")) != -1) {
+	while ((i = getopt(argc, argv, "p:m:")) != -1) {
 		switch (i) {
+		case 'p':
+			switch (atoi(optarg)) {
+			case 1:
+				crates_move = crates_move_9000;
+				break;
+
+			case 2:
+				crates_move = crates_move_9001;
+				break;
+
+			default:
+				fprintf(stderr, "Unexpected puzzle part %s\n", optarg);
+				return -1;
+			}
+			break;
+
 		case 'm':
 			if (strcmp(optarg, "9000") == 0)
 				crates_move = crates_move_9000;