windows: add GUID handling functions
Virtually every project that works with x/sys/window's GUIDs winds up
rolling their own version of this in one way or another. So let's add
the correct win32 wrappers for it, so that these are always generated,
parsed, and converted in the uniform correct way.
Change-Id: I35f4b4ab5fc681d3e16fc5bbaf2cb20031eb3f12
Reviewed-on: https://go-review.googlesource.com/c/sys/+/180938
Run-TryBot: Jason Donenfeld <Jason@zx2c4.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/windows/zsyscall_windows.go b/windows/zsyscall_windows.go
index a7663b5..55d2de1 100644
--- a/windows/zsyscall_windows.go
+++ b/windows/zsyscall_windows.go
@@ -42,6 +42,7 @@
modmswsock = NewLazySystemDLL("mswsock.dll")
modcrypt32 = NewLazySystemDLL("crypt32.dll")
moduser32 = NewLazySystemDLL("user32.dll")
+ modole32 = NewLazySystemDLL("ole32.dll")
modws2_32 = NewLazySystemDLL("ws2_32.dll")
moddnsapi = NewLazySystemDLL("dnsapi.dll")
modiphlpapi = NewLazySystemDLL("iphlpapi.dll")
@@ -221,6 +222,9 @@
procSetVolumeLabelW = modkernel32.NewProc("SetVolumeLabelW")
procSetVolumeMountPointW = modkernel32.NewProc("SetVolumeMountPointW")
procMessageBoxW = moduser32.NewProc("MessageBoxW")
+ procCLSIDFromString = modole32.NewProc("CLSIDFromString")
+ procStringFromGUID2 = modole32.NewProc("StringFromGUID2")
+ procCoCreateGuid = modole32.NewProc("CoCreateGuid")
procWSAStartup = modws2_32.NewProc("WSAStartup")
procWSACleanup = modws2_32.NewProc("WSACleanup")
procWSAIoctl = modws2_32.NewProc("WSAIoctl")
@@ -2406,6 +2410,32 @@
return
}
+func clsidFromString(lpsz *uint16, pclsid *GUID) (err error) {
+ r1, _, e1 := syscall.Syscall(procCLSIDFromString.Addr(), 2, uintptr(unsafe.Pointer(lpsz)), uintptr(unsafe.Pointer(pclsid)), 0)
+ if r1 != 0 {
+ if e1 != 0 {
+ err = errnoErr(e1)
+ } else {
+ err = syscall.EINVAL
+ }
+ }
+ return
+}
+
+func stringFromGUID2(rguid *GUID, lpsz *uint16, cchMax int) (chars int) {
+ r0, _, _ := syscall.Syscall(procStringFromGUID2.Addr(), 3, uintptr(unsafe.Pointer(rguid)), uintptr(unsafe.Pointer(lpsz)), uintptr(cchMax))
+ chars = int(r0)
+ return
+}
+
+func coCreateGuid(pguid *GUID) (ret error) {
+ r0, _, _ := syscall.Syscall(procCoCreateGuid.Addr(), 1, uintptr(unsafe.Pointer(pguid)), 0, 0)
+ if r0 != 0 {
+ ret = syscall.Errno(r0)
+ }
+ return
+}
+
func WSAStartup(verreq uint32, data *WSAData) (sockerr error) {
r0, _, _ := syscall.Syscall(procWSAStartup.Addr(), 2, uintptr(verreq), uintptr(unsafe.Pointer(data)), 0)
if r0 != 0 {
