From: Mart Lubbers <mart@martlubbers.net>
Date: Tue, 21 Dec 2021 10:06:56 +0000 (+0100)
Subject: cleanup
X-Git-Url: https://git.martlubbers.net/?a=commitdiff_plain;p=advent21.git

cleanup
---

diff --git a/21b.c b/21b.c
index 96153cc..521bd63 100644
--- a/21b.c
+++ b/21b.c
@@ -1,12 +1,13 @@
 #include <stdio.h>
 #include <stdbool.h>
+#include <inttypes.h>
 #include <uthash.h>
-#include <limits.h>
 
-struct result { unsigned long p1wins; unsigned long p2wins; };
-struct player { int pos; int score; };
+struct result { unsigned long p1; unsigned long p2; };
+struct player { uint8_t pos; uint8_t score; };
+struct key { struct player p1; struct player p2; bool p1turn; };
 struct cache {
-	struct key { bool p1turn; struct player p1; struct player p2; } key;
+	struct key key;
 	struct result res;
 	UT_hash_handle hh;
 };
@@ -41,41 +42,40 @@ struct result play(bool p1turn, struct player p1, struct player p2)
 	}
 }
 
-void add_result(struct result *l, struct result r)
+static inline void add_result(struct result *l, struct result r)
 {
-	l->p1wins += r.p1wins;
-	l->p2wins += r.p2wins;
+	l->p1 += r.p1;
+	l->p2 += r.p2;
 }
 
+#define FOR_THROWS(x) \
+	for (int i = 1; i<=3; i++)\
+		for (int j = 1; j<=3; j++)\
+			for (int k = 1; k<=3; k++)\
+				x
+
 struct result playd (bool p1turn, struct player p1, struct player p2)
 {
-	struct result r = {.p1wins=0, .p2wins=0};
-	if (p1.score >= 21) {
-		r.p1wins++;
-	} else if (p2.score >= 21) {
-		r.p2wins++;
-	} else if (p1turn) {
-		for (int i = 1; i<=3; i++)
-			for (int j = 1; j<=3; j++)
-				for (int k = 1; k<=3; k++)
-					add_result(&r, play(!p1turn, move(p1, i+j+k), p2));
-	} else {
-		for (int i = 1; i<=3; i++)
-			for (int j = 1; j<=3; j++)
-				for (int k = 1; k<=3; k++)
-					add_result(&r, play(!p1turn, p1, move(p2, i+j+k)));
-	}
+	struct result r = {.p1=0, .p2=0};
+	if (p1.score >= 21)
+		r.p1++;
+	else if (p2.score >= 21)
+		r.p2++;
+	else if (p1turn)
+		FOR_THROWS(add_result(&r, play(!p1turn, move(p1, i+j+k), p2)));
+	else
+		FOR_THROWS(add_result(&r, play(!p1turn, p1, move(p2, i+j+k))));
 	return r;
 }
 
 int main()
 {
 	struct player p1 = {.score=0}, p2 = {.score=0};
-	if (2 != scanf(
-			"Player 1 starting position: %d\n"
-			"Player 2 starting position: %d\n", &p1.pos, &p2.pos))
+	if (2 != scanf("Player 1 starting position: %" SCNu8 "\n"
+		       "Player 2 starting position: %" SCNu8 "\n",
+		       &p1.pos, &p2.pos))
 		return 1;
 
 	struct result r = play(true, p1, p2);
-	printf("%lu\n", r.p1wins > r.p2wins ? r.p1wins : r.p2wins);
+	printf("%lu\n", r.p1 > r.p2 ? r.p1 : r.p2);
 }