Fix for incorrect reported written bytes on Windows

Closes karalabe#36, karalabe#16
pennam · Jun 29, 2023 · 9d82ac7 · 9d82ac7
1 parent 9c14560
commit 9d82ac7
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/hid_enabled.go b/hid_enabled.go
@@ -164,8 +164,10 @@ func (dev *Device) Write(b []byte) (int, error) {
 	}
 	// Prepend a HID report ID on Windows, other OSes don't need it
 	var report []byte
+	fixlen := 0
 	if runtime.GOOS == "windows" {
 		report = append([]byte{0x00}, b...)
+		fixlen = -1
 	} else {
 		report = b
 	}
@@ -188,6 +190,9 @@ func (dev *Device) Write(b []byte) (int, error) {
 		failure, _ := wcharTToString(message)
 		return 0, errors.New("hidapi: " + failure)
 	}
+	if written > 0 {
+		written += fixlen
+	}
 	return written, nil
 }