const std = @import("std");
pub const WindowsVersion = std.Target.Os.WindowsVersion;
pub fn detectRuntimeVersion() WindowsVersion {
var version_info: std.os.windows.RTL_OSVERSIONINFOW = undefined;
version_info.dwOSVersionInfoSize = @sizeOf(@TypeOf(version_info));
switch (std.os.windows.ntdll.RtlGetVersion(&version_info)) {
.SUCCESS => {},
else => unreachable,
}
const os_ver: u16 = @intCast(u16, version_info.dwMajorVersion & 0xff) << 8 |
@intCast(u16, version_info.dwMinorVersion & 0xff);
const sp_ver: u8 = 0;
const sub_ver: u8 = if (os_ver >= 0x0A00) subver: {
var last_idx: usize = 0;
for (WindowsVersion.known_win10_build_numbers) |build, i| {
if (version_info.dwBuildNumber >= build)
last_idx = i;
}
break :subver @truncate(u8, last_idx);
} else 0;
const version: u32 = @as(u32, os_ver) << 16 | @as(u16, sp_ver) << 8 | sub_ver;
return @intToEnum(WindowsVersion, version);
}