1 files changed, 100 insertions, 0 deletions
diff --git a/vendor/github.com/karalabe/gousb/usb/endpoint.go b/vendor/github.com/karalabe/gousb/usb/endpoint.go
new file mode 100644
index 000000000..12b4ccf95
--- /dev/null
+++ b/vendor/github.com/karalabe/gousb/usb/endpoint.go
@@ -0,0 +1,100 @@
+// Copyright 2013 Google Inc.  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package usb
+
+// #include "libusb.h"
+import "C"
+
+import (
+	"fmt"
+	"reflect"
+	"time"
+	"unsafe"
+)
+
+type Endpoint interface {
+	Read(b []byte) (int, error)
+	Write(b []byte) (int, error)
+	Interface() InterfaceSetup
+	Info() EndpointInfo
+}
+
+type endpoint struct {
+	*Device
+	InterfaceSetup
+	EndpointInfo
+	xfer func(*endpoint, []byte, time.Duration) (int, error)
+}
+
+func (e *endpoint) Read(buf []byte) (int, error) {
+	if EndpointDirection(e.Address)&ENDPOINT_DIR_MASK != ENDPOINT_DIR_IN {
+		return 0, fmt.Errorf("usb: read: not an IN endpoint")
+	}
+
+	return e.xfer(e, buf, e.ReadTimeout)
+}
+
+func (e *endpoint) Write(buf []byte) (int, error) {
+	if EndpointDirection(e.Address)&ENDPOINT_DIR_MASK != ENDPOINT_DIR_OUT {
+		return 0, fmt.Errorf("usb: write: not an OUT endpoint")
+	}
+
+	return e.xfer(e, buf, e.WriteTimeout)
+}
+
+func (e *endpoint) Interface() InterfaceSetup { return e.InterfaceSetup }
+func (e *endpoint) Info() EndpointInfo        { return e.EndpointInfo }
+
+// TODO(kevlar): (*Endpoint).Close
+
+func bulk_xfer(e *endpoint, buf []byte, timeout time.Duration) (int, error) {
+	if len(buf) == 0 {
+		return 0, nil
+	}
+
+	data := (*reflect.SliceHeader)(unsafe.Pointer(&buf)).Data
+
+	var cnt C.int
+	if errno := C.libusb_bulk_transfer(
+		e.handle,
+		C.uchar(e.Address),
+		(*C.uchar)(unsafe.Pointer(data)),
+		C.int(len(buf)),
+		&cnt,
+		C.uint(timeout/time.Millisecond)); errno < 0 {
+		return 0, usbError(errno)
+	}
+	return int(cnt), nil
+}
+
+func interrupt_xfer(e *endpoint, buf []byte, timeout time.Duration) (int, error) {
+	if len(buf) == 0 {
+		return 0, nil
+	}
+
+	data := (*reflect.SliceHeader)(unsafe.Pointer(&buf)).Data
+
+	var cnt C.int
+	if errno := C.libusb_interrupt_transfer(
+		e.handle,
+		C.uchar(e.Address),
+		(*C.uchar)(unsafe.Pointer(data)),
+		C.int(len(buf)),
+		&cnt,
+		C.uint(timeout/time.Millisecond)); errno < 0 {
+		return 0, usbError(errno)
+	}
+	return int(cnt), nil
+}