added Cheat Sync Time (#957)

* added Cheat Sync Time

This syncs the ingame time with the real world time.
I wasnt quite sure where to put the code so im sorry if this is bad i just wanted to contribute to this project.

* Update soh/src/code/z_play.c

Co-authored-by: Christopher Leggett <chris@leggett.dev>

* Update z_play.c

added suggestions from leggettc18

* Update z_play.c

Co-authored-by: Christopher Leggett <chris@leggett.dev>

1 files changed, 28 insertions, 0 deletions

diff --git a/soh/src/code/z_play.c b/soh/src/code/z_play.c
index d5bcb5beb..f99979715 100644
--- a/soh/src/code/z_play.c
+++ b/soh/src/code/z_play.c
@@ -7,6 +7,8 @@
 #include "../libultraship/ImGuiImpl.h"
 #include "soh/frame_interpolation.h"
 
+#include <time.h>
+
 void* D_8012D1F0 = NULL;
 //UNK_TYPE D_8012D1F4 = 0; // unused
 Input* D_8012D1F8 = NULL;
@@ -1444,6 +1446,18 @@ void Gameplay_Draw(GlobalContext* globalCtx) {
     CLOSE_DISPS(gfxCtx);
 }
 
+time_t Gameplay_GetRealTime() {
+    time_t t1, t2;
+    struct tm* tms;
+    time(&t1);
+    tms = localtime(&t1);
+    tms->tm_hour = 0;
+    tms->tm_min = 0;
+    tms->tm_sec = 0;
+    t2 = mktime(tms);
+    return t1 - t2;
+}
+
 void Gameplay_Main(GameState* thisx) {
     GlobalContext* globalCtx = (GlobalContext*)thisx;
 
@@ -1487,6 +1501,20 @@ void Gameplay_Main(GameState* thisx) {
     if (1 && HREG(63)) {
         LOG_NUM("1", 1);
     }
+    
+    if (CVar_GetS32("gTimeSync", 0)) {
+        const int maxRealDaySeconds = 86400;
+        const int maxInGameDayTicks = 65536;
+
+        int secs = (int)Gameplay_GetRealTime();
+        float percent = (float)secs / (float)maxRealDaySeconds;
+
+        int newIngameTime = maxInGameDayTicks * percent;
+
+        gSaveContext.dayTime = newIngameTime;
+
+    }
+
 }
 
 // original name: "Game_play_demo_mode_check"