| // Copyright 2016 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 <iostream> |
| |
| #include "base/hash.h" |
| #include "base/logging.h" |
| #include "device/bluetooth/bluetooth_uuid.h" |
| |
| int main(int argc, char** argv) { |
| if (argc <= 1) { |
| std::cout << "Generates hash values given UUIDs using the same method\n" |
| << "as in bluetooth_metrics.cc.\n" |
| << "\n" |
| << "Output is formatted for including into histograms.xml.\n" |
| << "Note that tools/metrics/histograms/pretty_print.py will\n" |
| << "sort enum entries for you.\n" |
| << "\n" |
| << "Usage: " << argv[0] << " <uuid> [uuid2 ...]\n" |
| << " The UUIDs may be short UUIDs, and will be made\n" |
| << " canonical before being hashed.\n" |
| << "\n" |
| << "Example: " << argv[0] << " FEFF FEFE\n" |
| << " <int value=\"62669585\" " |
| "label=\"0000feff-0000-1000-8000-00805f9b34fb\"/>\n" |
| << " <int value=\"643543662\" " |
| "label=\"0000fefe-0000-1000-8000-00805f9b34fb\"/>\n"; |
| return 1; |
| } |
| |
| for (int i = 1; i < argc; i++) { |
| std::string input_string(argv[i]); |
| device::BluetoothUUID uuid(input_string); |
| std::string uuid_canonical_string = uuid.canonical_value(); |
| uint32_t hash = base::SuperFastHash(uuid_canonical_string.data(), |
| uuid_canonical_string.size()); |
| |
| // Strip off the sign bit because UMA doesn't support negative values, |
| // but takes a signed int as input. |
| hash &= 0x7fffffff; |
| |
| std::cout << " <int value=\"" << hash << "\" label=\"" |
| << uuid_canonical_string << "\"/>\n"; |
| } |
| return 0; |
| } |
