From 12b1a7c7c81322f3a788c206026f9fe3691a48e9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C5=A0imek?= <jsimek.cz@gmail.com>
Date: Wed, 25 May 2022 14:25:45 +0200
Subject: [PATCH] Remove obsolete OS version check

---
 src/win32.cc | 60 ++++++++--------------------------------------------
 src/win32.h  |  2 --
 2 files changed, 9 insertions(+), 53 deletions(-)

diff --git a/src/win32.cc b/src/win32.cc
index c966d37..0054f3e 100644
--- a/src/win32.cc
+++ b/src/win32.cc
@@ -5,7 +5,6 @@
 #include "main.h"
 #include "window_manager.h"
 
-#include <signal.h>
 #include <SDL.h>
 
 // 0x51E430
@@ -30,19 +29,13 @@ int main(int argc, char* argv[])
 
     _GNW95_mutex = CreateMutexA(0, TRUE, "GNW95MUTEX");
     if (GetLastError() == ERROR_SUCCESS) {
-        ShowCursor(0);
-        if (_InitInstance()) {
-            if (_LoadDirectX()) {
-                argsInit(&args);
-                if (argsParse(&args, argc, argv)) {
-                    signal(1, _SignalHandler);
-                    signal(3, _SignalHandler);
-                    signal(5, _SignalHandler);
-                    gProgramIsActive = true;
-                    falloutMain(args.argc, args.argv);
-                    argsFree(&args);
-                    return 1;
-                }
+        SDL_ShowCursor(SDL_DISABLE);
+        if (_LoadDirectX()) {
+            argsInit(&args);
+            if (argsParse(&args, argc, argv)) {
+                gProgramIsActive = true;
+                falloutMain(args.argc, args.argv);
+                argsFree(&args);
             }
         }
         CloseHandle(_GNW95_mutex);
@@ -50,35 +43,6 @@ int main(int argc, char* argv[])
     return 0;
 }
 
-// 0x4DE864
-bool _InitInstance()
-{
-    OSVERSIONINFOA osvi;
-    bool result;
-
-    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOA);
-
-#pragma warning(suppress : 4996 28159)
-    if (!GetVersionExA(&osvi)) {
-        return true;
-    }
-
-    result = true;
-
-    if (osvi.dwPlatformId == 0 || osvi.dwPlatformId == 2 && osvi.dwMajorVersion < 4) {
-        result = false;
-    }
-
-    if (!result) {
-        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,
-            "Wrong Windows Version",
-            "This program requires Windows 95 or Windows NT version 4.0 or greater.",
-            NULL);
-    }
-
-    return result;
-}
-
 // 0x4DE8D0
 bool _LoadDirectX()
 {
@@ -98,8 +62,8 @@ bool _LoadDirectX()
 
 err:
     _UnloadDirectX();
-
-    MessageBoxA(NULL, "This program requires Windows 95 with DirectX 3.0a or later or Windows NT version 4.0 with Service Pack 3 or greater.", "Could not load DirectX", MB_ICONSTOP);
+    
+    SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Could not load DirectX", "This program requires DirectX 3.0a or later.", NULL);
 
     return false;
 }
@@ -112,9 +76,3 @@ void _UnloadDirectX(void)
         gDSoundDLL = NULL;
     }
 }
-
-// 0x4DE9F4
-void _SignalHandler(int sig)
-{
-    // TODO: Incomplete.
-}
diff --git a/src/win32.h b/src/win32.h
index d61ce85..c52a900 100644
--- a/src/win32.h
+++ b/src/win32.h
@@ -20,9 +20,7 @@ extern bool gProgramIsActive;
 extern HANDLE _GNW95_mutex;
 extern HMODULE gDSoundDLL;
 
-bool _InitInstance();
 bool _LoadDirectX();
 void _UnloadDirectX(void);
-void _SignalHandler(int sig);
 
 #endif /* WIN32_H */