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// 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>
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
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