windows/mkwinsyscall: sort by dll names and dll function names

Otherwise generated file changes every time //sys lines are moved
around, or when mkwinsyscall command parameters are reordered.

Change-Id: Ie4bdbee2ba50f9cea36ec78ce9951c57bd5da8a7
Reviewed-on: https://go-review.googlesource.com/c/sys/+/260900
Trust: Alex Brainman <alex.brainman@gmail.com>
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

windows/mkwinsyscall/mkwinsyscall.go

@@ -663,6 +663,7 @@ func (src *Source) DLLs() []string {
 			r = append(r, name)
 		}
 	}
+	sort.Strings(r)
 	return r
 }
 
@@ -697,6 +698,13 @@ func (src *Source) ParseFile(path string) error {
 		return err
 	}
 	src.Files = append(src.Files, path)
+	sort.Slice(src.Funcs, func(i, j int) bool {
+		fi, fj := src.Funcs[i], src.Funcs[j]
+		if fi.DLLName() == fj.DLLName() {
+			return fi.DLLFuncName() < fj.DLLFuncName()
+		}
+		return fi.DLLName() < fj.DLLName()
+	})
 
 	// get package name
 	fset := token.NewFileSet()

windows/registry/zsyscall_windows.go

@@ -26,7 +26,7 @@ var (
 func errnoErr(e syscall.Errno) error {
 	switch e {
 	case 0:
-		return nil
+		return syscall.EINVAL
 	case errnoERROR_IO_PENDING:
 		return errERROR_IO_PENDING
 	}
@@ -40,16 +40,24 @@ var (
 	modadvapi32 = windows.NewLazySystemDLL("advapi32.dll")
 	modkernel32 = windows.NewLazySystemDLL("kernel32.dll")
 
+	procRegConnectRegistryW       = modadvapi32.NewProc("RegConnectRegistryW")
 	procRegCreateKeyExW           = modadvapi32.NewProc("RegCreateKeyExW")
 	procRegDeleteKeyW             = modadvapi32.NewProc("RegDeleteKeyW")
-	procRegSetValueExW            = modadvapi32.NewProc("RegSetValueExW")
-	procRegEnumValueW             = modadvapi32.NewProc("RegEnumValueW")
 	procRegDeleteValueW           = modadvapi32.NewProc("RegDeleteValueW")
+	procRegEnumValueW             = modadvapi32.NewProc("RegEnumValueW")
 	procRegLoadMUIStringW         = modadvapi32.NewProc("RegLoadMUIStringW")
-	procRegConnectRegistryW       = modadvapi32.NewProc("RegConnectRegistryW")
+	procRegSetValueExW            = modadvapi32.NewProc("RegSetValueExW")
 	procExpandEnvironmentStringsW = modkernel32.NewProc("ExpandEnvironmentStringsW")
 )
 
+func regConnectRegistry(machinename *uint16, key syscall.Handle, result *syscall.Handle) (regerrno error) {
+	r0, _, _ := syscall.Syscall(procRegConnectRegistryW.Addr(), 3, uintptr(unsafe.Pointer(machinename)), uintptr(key), uintptr(unsafe.Pointer(result)))
+	if r0 != 0 {
+		regerrno = syscall.Errno(r0)
+	}
+	return
+}
+
 func regCreateKeyEx(key syscall.Handle, subkey *uint16, reserved uint32, class *uint16, options uint32, desired uint32, sa *syscall.SecurityAttributes, result *syscall.Handle, disposition *uint32) (regerrno error) {
 	r0, _, _ := syscall.Syscall9(procRegCreateKeyExW.Addr(), 9, uintptr(key), uintptr(unsafe.Pointer(subkey)), uintptr(reserved), uintptr(unsafe.Pointer(class)), uintptr(options), uintptr(desired), uintptr(unsafe.Pointer(sa)), uintptr(unsafe.Pointer(result)), uintptr(unsafe.Pointer(disposition)))
 	if r0 != 0 {
@@ -66,8 +74,8 @@ func regDeleteKey(key syscall.Handle, subkey *uint16) (regerrno error) {
 	return
 }
 
-func regSetValueEx(key syscall.Handle, valueName *uint16, reserved uint32, vtype uint32, buf *byte, bufsize uint32) (regerrno error) {
-	r0, _, _ := syscall.Syscall6(procRegSetValueExW.Addr(), 6, uintptr(key), uintptr(unsafe.Pointer(valueName)), uintptr(reserved), uintptr(vtype), uintptr(unsafe.Pointer(buf)), uintptr(bufsize))
+func regDeleteValue(key syscall.Handle, name *uint16) (regerrno error) {
+	r0, _, _ := syscall.Syscall(procRegDeleteValueW.Addr(), 2, uintptr(key), uintptr(unsafe.Pointer(name)), 0)
 	if r0 != 0 {
 		regerrno = syscall.Errno(r0)
 	}
@@ -82,14 +90,6 @@ func regEnumValue(key syscall.Handle, index uint32, name *uint16, nameLen *uint3
 	return
 }
 
-func regDeleteValue(key syscall.Handle, name *uint16) (regerrno error) {
-	r0, _, _ := syscall.Syscall(procRegDeleteValueW.Addr(), 2, uintptr(key), uintptr(unsafe.Pointer(name)), 0)
-	if r0 != 0 {
-		regerrno = syscall.Errno(r0)
-	}
-	return
-}
-
 func regLoadMUIString(key syscall.Handle, name *uint16, buf *uint16, buflen uint32, buflenCopied *uint32, flags uint32, dir *uint16) (regerrno error) {
 	r0, _, _ := syscall.Syscall9(procRegLoadMUIStringW.Addr(), 7, uintptr(key), uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(buf)), uintptr(buflen), uintptr(unsafe.Pointer(buflenCopied)), uintptr(flags), uintptr(unsafe.Pointer(dir)), 0, 0)
 	if r0 != 0 {
@@ -98,8 +98,8 @@ func regLoadMUIString(key syscall.Handle, name *uint16, buf *uint16, buflen uint
 	return
 }
 
-func regConnectRegistry(machinename *uint16, key syscall.Handle, result *syscall.Handle) (regerrno error) {
-	r0, _, _ := syscall.Syscall(procRegConnectRegistryW.Addr(), 3, uintptr(unsafe.Pointer(machinename)), uintptr(key), uintptr(unsafe.Pointer(result)))
+func regSetValueEx(key syscall.Handle, valueName *uint16, reserved uint32, vtype uint32, buf *byte, bufsize uint32) (regerrno error) {
+	r0, _, _ := syscall.Syscall6(procRegSetValueExW.Addr(), 6, uintptr(key), uintptr(unsafe.Pointer(valueName)), uintptr(reserved), uintptr(vtype), uintptr(unsafe.Pointer(buf)), uintptr(bufsize))
 	if r0 != 0 {
 		regerrno = syscall.Errno(r0)
 	}
@@ -110,11 +110,7 @@ func expandEnvironmentStrings(src *uint16, dst *uint16, size uint32) (n uint32,
 	r0, _, e1 := syscall.Syscall(procExpandEnvironmentStringsW.Addr(), 3, uintptr(unsafe.Pointer(src)), uintptr(unsafe.Pointer(dst)), uintptr(size))
 	n = uint32(r0)
 	if n == 0 {
-		if e1 != 0 {
-			err = errnoErr(e1)
-		} else {
-			err = syscall.EINVAL
-		}
+		err = errnoErr(e1)
 	}
 	return
 }