From 1265834a711b0d68f19361d62b069618f53b3ac6 Mon Sep 17 00:00:00 2001
From: Stephen Adams <edu/mit/csail/zurich/adams>
Date: Tue, 9 Apr 1996 20:16:32 +0000
Subject: [PATCH] Changed Windows version handling so that Scheme correctly
 distinguishes Windows 3.1 from Windows 95.

---
 v7/src/microcode/ntsys.c | 16 ++--------------
 v7/src/microcode/ntsys.h | 14 +++-----------
 v7/src/microcode/nttop.c | 41 ++++++++++++++++++++++++++++------------
 3 files changed, 34 insertions(+), 37 deletions(-)

diff --git a/v7/src/microcode/ntsys.c b/v7/src/microcode/ntsys.c
index a5c3ad1a6..28fbfbf42 100644
--- a/v7/src/microcode/ntsys.c
+++ b/v7/src/microcode/ntsys.c
@@ -1,8 +1,8 @@
 /* -*-C-*-
 
-$Id: ntsys.c,v 1.4 1993/09/03 18:03:03 gjr Exp $
+$Id: ntsys.c,v 1.5 1996/04/09 20:16:32 adams Exp $
 
-Copyright (c) 1992-1993 Massachusetts Institute of Technology
+Copyright (c) 1992-1996 Massachusetts Institute of Technology
 
 This material was developed by the Scheme project at the Massachusetts
 Institute of Technology, Department of Electrical Engineering and
@@ -48,18 +48,6 @@ nt_console_write (void * vbuffer, size_t nsize)
   return (nsize);
 }
 
-void
-nt_get_version (version_t * version_number)
-{
-  DWORD ver;
-  ver = (GetVersion ());
-  version_number->platform = ((unsigned char)
-			      ((((unsigned long) ver) & 0x80000000UL) >> 31));
-  version_number->major = (LOBYTE (LOWORD (ver)));
-  version_number->minor = (HIBYTE (LOWORD (ver)));
-  return;
-}
-
 BOOL
 nt_pathname_as_filename (char * name, char * buffer)
 { /* Returns whether directory encountered is top level */
diff --git a/v7/src/microcode/ntsys.h b/v7/src/microcode/ntsys.h
index d10611bd2..aeb9c8f2f 100644
--- a/v7/src/microcode/ntsys.h
+++ b/v7/src/microcode/ntsys.h
@@ -1,8 +1,8 @@
 /* -*-C-*-
 
-$Id: ntsys.h,v 1.5 1996/03/23 19:24:46 adams Exp $
+$Id: ntsys.h,v 1.6 1996/04/09 20:16:08 adams Exp $
 
-Copyright (c) 1992-96 Massachusetts Institute of Technology
+Copyright (c) 1992-1996 Massachusetts Institute of Technology
 
 This material was developed by the Scheme project at the Massachusetts
 Institute of Technology, Department of Electrical Engineering and
@@ -35,18 +35,10 @@ MIT in each case. */
 #ifndef SCM_NTSYS_H
 #define SCM_NTSYS_H
 
-typedef struct version_struct
-{
-  unsigned char platform;
-  unsigned char major;
-  unsigned char minor;
-} version_t;
-
 /* Misc */
 
 extern BOOL win32_under_win32s_p ();
-extern int nt_console_write (void * vbuffer, size_t nsize);
-extern void nt_get_version (version_t * version_number);
+extern int  nt_console_write (void * vbuffer, size_t nsize);
 extern BOOL nt_pathname_as_filename (char * name, char * buffer);
 
 #endif /* SCM_NTSYS_H */
diff --git a/v7/src/microcode/nttop.c b/v7/src/microcode/nttop.c
index 981e309d8..428d46cdf 100644
--- a/v7/src/microcode/nttop.c
+++ b/v7/src/microcode/nttop.c
@@ -1,6 +1,6 @@
 /* -*-C-*-
 
-$Id: nttop.c,v 1.17 1996/03/23 19:24:40 adams Exp $
+$Id: nttop.c,v 1.18 1996/04/09 20:15:53 adams Exp $
 
 Copyright (c) 1993-96 Massachusetts Institute of Technology
 
@@ -65,7 +65,8 @@ extern CONST char * OS_Variant;
 BOOL
 win32_under_win32s_p ()
 {
-  return  ((GetVersion()) >> 31);
+  DWORD dwVersion = GetVersion();
+  return  ((dwVersion>0x80000000) && LOBYTE(LOWORD(dwVersion))<4);
 }
 
 WIN32_SYSTEM_UTILITIES win32_system_utilities;
@@ -123,16 +124,32 @@ DEFUN_VOID (OS_initialize)
 
   OS_Name = SYSTEM_NAME;
   {
-    version_t version_number;
-    const char * variant;
-
-    nt_get_version (&version_number);
-    variant = ((version_number.platform == 0) ? "Windows NT" : "Windows");
-    OS_Variant = (malloc ((strlen (variant)) + 64));
-    sprintf (OS_Variant, "%s %d.%d 386/486\n",
-	     variant,
-	     ((int) version_number.major),
-	     ((int) version_number.minor));
+    DWORD dwVersion = GetVersion();
+    char variant[128];
+
+    if (dwVersion < 0x80000000) {
+      // Windows NT
+	sprintf (variant, "Microsoft Windows NT %u.%u (Build: %u)",
+		 (DWORD)(LOBYTE(LOWORD(dwVersion))),
+		 (DWORD)(HIBYTE(LOWORD(dwVersion))),
+		 (DWORD)(HIWORD(dwVersion)));
+    }
+    else if (LOBYTE(LOWORD(dwVersion))<4) {
+      // Win32s
+	sprintf (variant, "Microsoft Win32s %u.%u (Build: %u)",
+		 (DWORD)(LOBYTE(LOWORD(dwVersion))),
+		 (DWORD)(HIBYTE(LOWORD(dwVersion))),
+		 (DWORD)(HIWORD(dwVersion) & ~0x8000));
+    } else {
+      // Windows 95
+	sprintf (variant, "Microsoft Windows 95 %u.%u (Build: %u)",
+		 (DWORD)(LOBYTE(LOWORD(dwVersion))),
+		 (DWORD)(HIBYTE(LOWORD(dwVersion))),
+		 (DWORD)(HIWORD(dwVersion) & ~0x8000));
+    }
+
+    OS_Variant = malloc (128);
+    sprintf (OS_Variant, "%s 386/486\n", variant);
   }
 }
 
-- 
2.25.1