From 50b1e9a48eac8667799222a404d60dbbc0963d35 Mon Sep 17 00:00:00 2001
From: Connor <cloningdonor@gmail.com>
Date: Mon, 4 Jun 2018 11:14:04 -0700
Subject: [PATCH]

---
 tennis.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/tennis.c b/tennis.c
index 96c79ec..dce7a93 100644
--- a/tennis.c
+++ b/tennis.c
@@ -76,6 +76,14 @@ typedef enum {
     MT_DOUBLES_POINT_3,
 } gamemode_t;
 
+typedef enum {
+    MT_HARD,
+    MT_CLAY,
+    MT_GRASS,
+    MT_COMPOSITION,
+    MT_OPEN,
+} court_t;
+
 typedef struct {
     char code[9];
     // data[0]: cup name
@@ -110,7 +118,7 @@ code_t translate(const char *entry) {
 }
 
 int check_ranges(const code_t *code) {
-    const u32 neg1 = (u32)-1;
+    const u32 choice = (u32)MT_CHOICE;
     const u32 *data = code->data;
 
     return
@@ -121,8 +129,8 @@ int check_ranges(const code_t *code) {
         (data[4] + 1 < bases[4] - 4) &&
         (data[5] < bases[5]) &&
         (data[6] + 1 < bases[6]) &&
-        (data[2] == neg1 || data[2] != data[4]) &&
-        (data[1] < 7 || (data[2] != neg1 && data[4] != neg1));
+        (data[2] == choice || data[2] != data[4]) &&
+        (data[1] < 7 || (data[2] != choice && data[4] != choice));
 }
 
 int decode_data(code_t *code) {