WebUSB bindings part 4

Source/modules/webusb/USBEndpoint.cpp

Index: Source/modules/webusb/USBEndpoint.cpp
diff --git a/Source/modules/webusb/USBEndpoint.cpp b/Source/modules/webusb/USBEndpoint.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..e0230bbd2dfdd625bc1abc32d6e7a1dd2fa62be3
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+++ b/Source/modules/webusb/USBEndpoint.cpp
@@ -0,0 +1,120 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "modules/webusb/USBEndpoint.h"
+
+#include "bindings/core/v8/ExceptionState.h"
+#include "core/dom/DOMException.h"
+#include "core/dom/ExceptionCode.h"
+#include "modules/webusb/USBAlternateInterface.h"
+#include "public/platform/modules/webusb/WebUSBDevice.h"
+
+namespace blink {
+
+namespace {
+
+bool convertDirectionFromEnum(const String& direction, WebUSBDevice::TransferDirection* webDirection)
+{
+    if (direction == "in")
+        *webDirection = WebUSBDevice::TransferDirection::In;
+    else if (direction == "out")
+        *webDirection = WebUSBDevice::TransferDirection::Out;
+    else
+        return false;
+    return true;
+}
+
+String convertDirectionToEnum(const WebUSBDevice::TransferDirection& direction)
+{
+    switch (direction) {
+    case WebUSBDevice::TransferDirection::In:
+        return "in";
+    case WebUSBDevice::TransferDirection::Out:
+        return "out";
+    default:
+        ASSERT_NOT_REACHED();
+        return "";
+    }
+}
+
+String convertTypeToEnum(const WebUSBDeviceInfo::Endpoint::Type& type)
+{
+    switch (type) {
+    case WebUSBDeviceInfo::Endpoint::Type::Bulk:
+        return "bulk";
+    case WebUSBDeviceInfo::Endpoint::Type::Interrupt:
+        return "interrupt";
+    case WebUSBDeviceInfo::Endpoint::Type::Isochronous:
+        return "isochronous";
+    default:
+        ASSERT_NOT_REACHED();
+        return "";
+    }
+}
+
+} // namespace
+
+USBEndpoint* USBEndpoint::create(const USBAlternateInterface* alternate, size_t endpointIndex)
+{
+    return new USBEndpoint(alternate, endpointIndex);
+}
+
+USBEndpoint* USBEndpoint::create(const USBAlternateInterface* alternate, size_t endpointNumber, const String& direction, ExceptionState& exceptionState)
+{
+    WebUSBDevice::TransferDirection webDirection;
+    if (!convertDirectionFromEnum(direction, &webDirection)) {
+        exceptionState.throwRangeError("Invalid endpoint direction.");
+        return nullptr;
+    }
+    for (size_t i = 0; i < alternate->info().endpoints.size(); ++i) {
+        const WebUSBDeviceInfo::Endpoint& endpoint = alternate->info().endpoints[i];
+        if (endpoint.endpointNumber == endpointNumber && endpoint.direction == webDirection)
+            return USBEndpoint::create(alternate, i);
+    }
+    exceptionState.throwRangeError("Invalid endpoint number.");
+    return nullptr;
+}
+
+USBEndpoint::USBEndpoint(const USBAlternateInterface* alternate, size_t endpointIndex)
+    : m_alternate(alternate)
+    , m_endpointIndex(endpointIndex)
+{
+    ASSERT(m_alternate);
+    ASSERT(m_endpointIndex < m_alternate->info().endpoints.size());
+}
+
+const WebUSBDeviceInfo::Endpoint& USBEndpoint::info() const
+{
+    const WebUSBDeviceInfo::AlternateInterface& alternateInfo = m_alternate->info();
+    ASSERT(m_endpointIndex < alternateInfo.endpoints.size());
+    return alternateInfo.endpoints[m_endpointIndex];
+}
+
+uint8_t USBEndpoint::endpointNumber() const
+{
+    return info().endpointNumber;
+}
+
+String USBEndpoint::direction() const
+{
+    return convertDirectionToEnum(info().direction);
+}
+
+String USBEndpoint::type() const
+{
+    return convertTypeToEnum(info().type);
+}
+
+unsigned USBEndpoint::packetSize() const
+{
+    return info().packetSize;
+}
+
+DEFINE_TRACE(USBEndpoint)
+{
+    visitor->trace(m_alternate);
+}
+
+} // namespace blink