Move get_os_major_version() to wsutil and rename it to get_windows_major_version().

It's Windows-specific, so name it appropriately.

Change-Id: Ic518cbfabebf95757f6b308a4d547a6cabed6a5e
Reviewed-on: https://code.wireshark.org/review/2528
Reviewed-by: Guy Harris <guy@alum.mit.edu>

1 files changed, 24 insertions, 0 deletions

diff --git a/wsutil/os_version_info.c b/wsutil/os_version_info.c
index ba91b4163d..e72ee7f990 100644
--- a/wsutil/os_version_info.c
+++ b/wsutil/os_version_info.c
@@ -476,3 +476,27 @@ get_os_version_info(GString *str)
 	g_string_append(str, "an unknown OS");
 #endif
 }
+
+#if defined(_WIN32)
+/*
+ * Get the Windows major OS version.
+ *
+ * XXX - Should this return the minor version as well, e.g. 0x00050002?
+ *
+ * XXX - I think Microsoft have now stuck it at 6 forever, so it really
+ * distinguishes, on the versions of Windows we currently support and
+ * future Windows versions between Windows 2000/XP (major version 5) and
+ * everything after it (major version 6).
+ */
+guint32
+get_windows_major_version(void)
+{
+	OSVERSIONINFO info;
+
+	info.dwOSVersionInfoSize = sizeof info;
+	if (GetVersionEx(&info)) {
+		return info.dwMajorVersion;
+	}
+	return 0;
+}
+#endif