From 178089f47710ff90f71a8a2a553ed0700b198ed3 Mon Sep 17 00:00:00 2001
From: Elias Fleckenstein <eliasfleckenstein@web.de>
Date: Sun, 13 Jun 2021 20:41:37 +0200
Subject: [PATCH] Public calculate_dtime function

---
 plugins/game/game.c | 8 ++++++--
 plugins/game/game.h | 2 ++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/plugins/game/game.c b/plugins/game/game.c
index 5d5c31a..152a5c9 100644
--- a/plugins/game/game.c
+++ b/plugins/game/game.c
@@ -3,7 +3,6 @@
 #include <unistd.h>
 #include <assert.h>
 #include <ctype.h>
-#include <time.h>
 #include <signal.h>
 #include <termios.h>
 #include <math.h>
@@ -125,6 +124,11 @@ void *make_buffer(void *ptr, size_t size)
 	return buf;
 }
 
+double calculate_dtime(struct timespec from, struct timespec to)
+{
+	return (double) (to.tv_sec - from.tv_sec) + (double) (to.tv_nsec - from.tv_nsec) / 1000000000.0;
+}
+
 /* Game-related utility functions */
 
 void quit()
@@ -517,7 +521,7 @@ void game()
 
 	while (running) {
 		clock_gettime(CLOCK_REALTIME, &ts);
-		double dtime = (double) (ts.tv_sec - ts_old.tv_sec) + (double) (ts.tv_nsec - ts_old.tv_nsec) / 1000000000.0;
+		double dtime = calculate_dtime(ts_old, ts);
 		ts_old = ts;
 
 		bool dead = player_dead();
diff --git a/plugins/game/game.h b/plugins/game/game.h
index 7ae9344..60c1d61 100644
--- a/plugins/game/game.h
+++ b/plugins/game/game.h
@@ -4,6 +4,7 @@
 #include <stdbool.h>
 #include <sys/ioctl.h>
 #include <stddef.h>
+#include <time.h>
 #define MAP_HEIGHT 1000
 #define MAP_WIDTH 1000
 #define LIGHT 10
@@ -111,6 +112,7 @@ int clamp(int v, int max, int min);
 int max(int a, int b);
 int min(int a, int b);
 void *make_buffer(void *ptr, size_t size);
+double calculate_dtime(struct timespec from, struct timespec to);
 
 void quit();
 bool player_dead();
-- 
2.44.0