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| 1 // Copyright (c) 2013 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 #ifndef COMPONENTS_RAPPOR_RAPPOR_PARAMETERS_H_ |
| 6 #define COMPONENTS_RAPPOR_RAPPOR_PARAMETERS_H_ |
| 7 |
| 8 #include <string> |
| 9 |
| 10 namespace rappor { |
| 11 |
| 12 enum Probability { |
| 13 PROBABILITY_87_5, // 87.5% |
| 14 PROBABILITY_75, // 75% |
| 15 PROBABILITY_50, // 50% |
| 16 PROBABILITY_25, // 25% |
| 17 PROBABILITY_12_5, // 12.5% |
| 18 }; |
| 19 |
| 20 // An object describing a rappor metric and the parameters used to generate it. |
| 21 // |
| 22 // For a full description of the rappor metrics, see |
| 23 // http://www.chromium.org/developers/design-documents/rappor |
| 24 struct RapporParameters { |
| 25 // The name of the metric. |
| 26 std::string rappor_name; |
| 27 |
| 28 // The number of bytes stored in the bloom filter. |
| 29 int bloom_filter_size_bytes; |
| 30 // The number of hashes used in the bloom filter. |
| 31 int bloom_filter_hash_count; |
| 32 |
| 33 // The probability that a bit will be replaced with fake data. |
| 34 Probability fake_prob; |
| 35 // The probability that a fake bit will be a one. |
| 36 Probability fake_one_prob; |
| 37 // The probability that a one bit reports as one. |
| 38 Probability one_coin_prob; |
| 39 // The probability that a zero bit reports as one. |
| 40 Probability zero_coin_prob; |
| 41 }; |
| 42 |
| 43 } // namespace rappor |
| 44 |
| 45 #endif // COMPONENTS_RAPPOR_RAPPOR_PARAMETERS_H_ |
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