From fe79be68e9cecf0a3a4ac168df76fbba326d1e05 Mon Sep 17 00:00:00 2001
From: SmileyAG <redstyle45@gmail.com>
Date: Tue, 2 Jan 2024 05:20:50 +0400
Subject: [PATCH] Get engine build version from sv_version cvar

---
 cl_dll/cdll_int.cpp | 21 +++++++++++++++++++++
 cl_dll/cl_util.h    | 10 ++++++++++
 cl_dll/hud.h        |  3 +++
 3 files changed, 34 insertions(+)

diff --git a/cl_dll/cdll_int.cpp b/cl_dll/cdll_int.cpp
index ae8b3790..4f52bd1f 100644
--- a/cl_dll/cdll_int.cpp
+++ b/cl_dll/cdll_int.cpp
@@ -151,6 +151,25 @@ void CL_DLLEXPORT HUD_PlayerMove( struct playermove_s *ppmove, int server )
 	PM_Move( ppmove, server );
 }
 
+void SaveEngineVersion()
+{
+	cvar_t *sv_version = gEngfuncs.pfnGetCvarPointer("sv_version");
+	if (sv_version)
+	{
+		strncpy(gHUD.m_szEngineVersion, sv_version->string, sizeof(gHUD.m_szEngineVersion) - 1);
+
+		// Parse build number
+		std::string version = gHUD.m_szEngineVersion;
+		size_t lastComma = version.rfind(',');
+		
+		if (lastComma != std::string::npos)
+		{
+			const char *buildStr = gHUD.m_szEngineVersion + lastComma + 1;
+			gHUD.m_iEngineBuildNumber = atoi(buildStr);
+		}
+	}
+}
+
 int CL_DLLEXPORT Initialize( cl_enginefunc_t *pEnginefuncs, int iVersion )
 {
 	gEngfuncs = *pEnginefuncs;
@@ -162,6 +181,8 @@ int CL_DLLEXPORT Initialize( cl_enginefunc_t *pEnginefuncs, int iVersion )
 
 	memcpy(&gEngfuncs, pEnginefuncs, sizeof(cl_enginefunc_t));
 
+	SaveEngineVersion();
+
 	update_checker::check_for_updates();
 	discord_integration::initialize();
 
diff --git a/cl_dll/cl_util.h b/cl_dll/cl_util.h
index f558de63..40b1611a 100644
--- a/cl_dll/cl_util.h
+++ b/cl_dll/cl_util.h
@@ -29,6 +29,16 @@
 #include <stdarg.h>  // "
 #include <string.h> // for strncpy()
 
+#ifdef _WIN32
+#define BUILD_OFFSET_LINUX 0
+#else
+#define BUILD_OFFSET_LINUX 1
+#endif
+
+constexpr int ENGINE_BUILD_ANNIVERSARY_FIRST = 9884 + BUILD_OFFSET_LINUX;
+
+#undef BUILD_OFFSET_LINUX
+
 // Macros to hook function calls into the HUD object
 #define HOOK_MESSAGE(x) gEngfuncs.pfnHookUserMsg(#x, __MsgFunc_##x );
 
diff --git a/cl_dll/hud.h b/cl_dll/hud.h
index 1964a126..08578783 100644
--- a/cl_dll/hud.h
+++ b/cl_dll/hud.h
@@ -787,6 +787,9 @@ class CHud
 	bool IsTriggerForSinglePlayer(color24 rendercolor);
 
 	HSPRITE white_sprite = 0;
+
+	char m_szEngineVersion[256];
+	int m_iEngineBuildNumber = -1;
 };
 
 extern CHud gHUD;