1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "device/usb/usb_ids.h" 6 7 #include <stdlib.h> 8 9 #include "base/basictypes.h" 10 11 namespace device { 12 13 namespace { 14 15 static int CompareVendors(const void* a, const void* b) { 16 const UsbVendor* vendor_a = static_cast<const UsbVendor*>(a); 17 const UsbVendor* vendor_b = static_cast<const UsbVendor*>(b); 18 return vendor_a->id - vendor_b->id; 19 } 20 21 static int CompareProducts(const void* a, const void* b) { 22 const UsbProduct* product_a = static_cast<const UsbProduct*>(a); 23 const UsbProduct* product_b = static_cast<const UsbProduct*>(b); 24 return product_a->id - product_b->id; 25 } 26 27 } // namespace 28 29 const UsbVendor* UsbIds::FindVendor(uint16_t vendor_id) { 30 const UsbVendor key = {vendor_id, NULL, 0, NULL}; 31 void* result = bsearch(&key, vendors_, vendor_size_, sizeof(vendors_[0]), 32 &CompareVendors); 33 if (!result) 34 return NULL; 35 return static_cast<const UsbVendor*>(result); 36 } 37 38 const char* UsbIds::GetVendorName(uint16_t vendor_id) { 39 const UsbVendor* vendor = FindVendor(vendor_id); 40 if (!vendor) 41 return NULL; 42 return vendor->name; 43 } 44 45 const char* UsbIds::GetProductName(uint16_t vendor_id, uint16_t product_id) { 46 const UsbVendor* vendor = FindVendor(vendor_id); 47 if (!vendor) 48 return NULL; 49 50 const UsbProduct key = {product_id, NULL}; 51 void* result = bsearch(&key, vendor->products, vendor->product_size, 52 sizeof(vendor->products[0]), &CompareProducts); 53 if (!result) 54 return NULL; 55 return static_cast<const UsbProduct*>(result)->name; 56 } 57 58 } // namespace device 59
