1 // Copyright 2014 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/hid/hid_utils_mac.h" 6 7 #include "base/mac/foundation_util.h" 8 #include "base/strings/sys_string_conversions.h" 9 10 namespace device { 11 12 int32_t GetHidIntProperty(IOHIDDeviceRef device, CFStringRef key) { 13 int32_t value; 14 if (TryGetHidIntProperty(device, key, &value)) 15 return value; 16 return 0; 17 } 18 19 std::string GetHidStringProperty(IOHIDDeviceRef device, CFStringRef key) { 20 std::string value; 21 TryGetHidStringProperty(device, key, &value); 22 return value; 23 } 24 25 bool TryGetHidIntProperty(IOHIDDeviceRef device, 26 CFStringRef key, 27 int32_t* result) { 28 CFNumberRef ref = base::mac::CFCast<CFNumberRef>( 29 IOHIDDeviceGetProperty(device, key)); 30 return ref && CFNumberGetValue(ref, kCFNumberSInt32Type, result); 31 } 32 33 bool TryGetHidStringProperty(IOHIDDeviceRef device, 34 CFStringRef key, 35 std::string* result) { 36 CFStringRef ref = base::mac::CFCast<CFStringRef>( 37 IOHIDDeviceGetProperty(device, key)); 38 if (!ref) { 39 return false; 40 } 41 *result = base::SysCFStringRefToUTF8(ref); 42 return true; 43 } 44 45 } // namespace device 46
