From 670ef721b13e907a1da915080b146b9e7dc1c3b8 Mon Sep 17 00:00:00 2001
From: Adam Spragg <adam@spra.gg>
Date: Fri, 30 Dec 2022 12:07:20 +0000
Subject: Puzzle 19: Allow user to specify build strategy

---
 19.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/19.c b/19.c
index b3475f1..5e9e485 100644
--- a/19.c
+++ b/19.c
@@ -2,6 +2,7 @@
 #include <regex.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 
 
@@ -181,13 +182,18 @@ int
 main(int argc, char ** argv)
 {
 	int rounds = 24;
+	char const * build = "basic";
 	int i;
 	regex_t reblueprint;
 	char buf[BUFSIZ];
 
-	while ((i = getopt(argc, argv, "r:")) != -1)
+	while ((i = getopt(argc, argv, "b:r:")) != -1)
 	{
 		switch (i) {
+		case 'b':
+			build = optarg;
+			break;
+
 		case 'r':
 			rounds = atoi(optarg);
 			break;
@@ -229,7 +235,14 @@ main(int argc, char ** argv)
 
 		inventory_init(&i);
 
-		inventory_build_basic(&i, &b, rounds);
+		if (strcmp(build, "basic") == 0) {
+			inventory_build_basic(&i, &b, rounds);
+		}
+		else {
+			fprintf(stderr, "Unknown build strategy: %s\n", build);
+			regfree(&reblueprint);
+			return -1;
+		}
 
 		printf("Blueprint %d geodes = %ld\n", b.id, i.geod.amount);
 	}
-- 
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