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authorgdk@chromium.org <gdk@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>2012-12-05 22:41:18 +0000
committergdk@chromium.org <gdk@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>2012-12-05 22:41:18 +0000
commit25d2b1394d6623eabe814c8287c66d4345d2abbe (patch)
tree1a9de6d8738e8330fb9af9158000b40d84ef12bb /device/usb
parent13a016d52277755897c27502160a0bfbfb69e455 (diff)
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Adding USB ID vendor and product lookups.
This change adds a tool for generating the lookup table, a wrapper around the lookup table, and the build infrastructure required to invoke the rule when compiling. BUG=127302 TBR=sky Review URL: https://chromiumcodereview.appspot.com/11344039 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@171339 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'device/usb')
-rw-r--r--device/usb/OWNERS2
-rw-r--r--device/usb/usb_ids.cc58
-rw-r--r--device/usb/usb_ids.h58
-rw-r--r--device/usb/usb_ids_unittest.cc31
4 files changed, 149 insertions, 0 deletions
diff --git a/device/usb/OWNERS b/device/usb/OWNERS
new file mode 100644
index 0000000..2ffd61a
--- /dev/null
+++ b/device/usb/OWNERS
@@ -0,0 +1,2 @@
+gdk@chromium.org
+bryeung@chromium.org
diff --git a/device/usb/usb_ids.cc b/device/usb/usb_ids.cc
new file mode 100644
index 0000000..fbb5b7e
--- /dev/null
+++ b/device/usb/usb_ids.cc
@@ -0,0 +1,58 @@
+// Copyright (c) 2012 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 "device/usb/usb_ids.h"
+
+#include <stdlib.h>
+
+#include "base/basictypes.h"
+
+namespace device {
+
+namespace {
+
+static int CompareVendors(const void* a, const void* b) {
+ const UsbVendor* vendor_a = static_cast<const UsbVendor*>(a);
+ const UsbVendor* vendor_b = static_cast<const UsbVendor*>(b);
+ return vendor_a->id - vendor_b->id;
+}
+
+static int CompareProducts(const void* a, const void* b) {
+ const UsbProduct* product_a = static_cast<const UsbProduct*>(a);
+ const UsbProduct* product_b = static_cast<const UsbProduct*>(b);
+ return product_a->id - product_b->id;
+}
+
+} // namespace
+
+const UsbVendor* UsbIds::FindVendor(uint16_t vendor_id) {
+ const UsbVendor key = {vendor_id, NULL, 0, NULL};
+ void* result = bsearch(&key, vendors_, vendor_size_, sizeof(vendors_[0]),
+ &CompareVendors);
+ if (!result)
+ return NULL;
+ return static_cast<const UsbVendor*>(result);
+}
+
+const char* UsbIds::GetVendorName(uint16_t vendor_id) {
+ const UsbVendor* vendor = FindVendor(vendor_id);
+ if (!vendor)
+ return NULL;
+ return vendor->name;
+}
+
+const char* UsbIds::GetProductName(uint16_t vendor_id, uint16_t product_id) {
+ const UsbVendor* vendor = FindVendor(vendor_id);
+ if (!vendor)
+ return NULL;
+
+ const UsbProduct key = {product_id, NULL};
+ void* result = bsearch(&key, vendor->products, vendor->product_size,
+ sizeof(vendor->products[0]), &CompareProducts);
+ if (!result)
+ return NULL;
+ return static_cast<const UsbProduct*>(result)->name;
+}
+
+} // namespace device
diff --git a/device/usb/usb_ids.h b/device/usb/usb_ids.h
new file mode 100644
index 0000000..2f6b950
--- /dev/null
+++ b/device/usb/usb_ids.h
@@ -0,0 +1,58 @@
+// Copyright (c) 2012 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.
+
+#ifndef DEVICE_USB_USB_IDS_H_
+#define DEVICE_USB_USB_IDS_H_
+
+#include <stdint.h>
+
+#include "base/basictypes.h"
+
+namespace device {
+
+struct UsbProduct {
+ const uint16_t id;
+ const char* name;
+};
+
+struct UsbVendor {
+ const uint16_t id;
+ const char* name;
+ const size_t product_size;
+ const UsbProduct* products;
+};
+
+// UsbIds provides a static mapping from a vendor ID to a name, as well as a
+// mapping from a vendor/product ID pair to a product name.
+class UsbIds {
+ public:
+ // Gets the name of the vendor who owns |vendor_id|. Returns NULL if the
+ // specified |vendor_id| does not exist.
+ static const char* GetVendorName(uint16_t vendor_id);
+
+ // Gets the name of a product belonging to a specific vendor. If either
+ // |vendor_id| refers to a vendor that does not exist, or |vendor_id| is valid
+ // but |product_id| refers to a product that does not exist, this method
+ // returns NULL.
+ static const char* GetProductName(uint16_t vendor_id, uint16_t product_id);
+
+ private:
+ UsbIds();
+ ~UsbIds();
+
+ // Finds the static UsbVendor associated with |vendor_id|. Returns NULL if no
+ // such vendor exists.
+ static const UsbVendor* FindVendor(uint16_t vendor_id);
+
+ // These fields are defined in a generated file. See device/device.gyp for
+ // more information on how they are generated.
+ static const size_t vendor_size_;
+ static const UsbVendor vendors_[];
+
+ DISALLOW_COPY_AND_ASSIGN(UsbIds);
+};
+
+} // namespace device
+
+#endif // DEVICE_USB_USB_IDS_H_
diff --git a/device/usb/usb_ids_unittest.cc b/device/usb/usb_ids_unittest.cc
new file mode 100644
index 0000000..decce1e
--- /dev/null
+++ b/device/usb/usb_ids_unittest.cc
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 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 <string>
+
+#include "device/usb/usb_ids.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+static const uint16_t kGoogleVendorId = 0x18d1;
+static const uint16_t kNexusSProductId = 0x4e21;
+
+} // namespace
+
+namespace device {
+
+TEST(UsbIdsTest, GetVendorName) {
+ EXPECT_EQ(NULL, UsbIds::GetVendorName(0));
+ EXPECT_EQ(std::string("Google Inc."), UsbIds::GetVendorName(kGoogleVendorId));
+}
+
+TEST(UsbIdsTest, GetProductName) {
+ EXPECT_EQ(NULL, UsbIds::GetProductName(0, 0));
+ EXPECT_EQ(NULL, UsbIds::GetProductName(kGoogleVendorId, 0));
+ EXPECT_EQ(std::string("Nexus S"), UsbIds::GetProductName(kGoogleVendorId,
+ kNexusSProductId));
+}
+
+} // namespace device