57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
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// Copyright 2014 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Sample code for encoder.cc.
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//
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// This is the code in README.md. It's here to make sure it actually builds
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// and runs.
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#include <cassert> // assert
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#include "encoder.h"
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#include "openssl_hash_impl.h"
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#include "unix_kernel_rand_impl.h"
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int main(int argc, char** argv) {
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// Suppress unused variable warnings
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(void) argc;
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(void) argv;
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FILE* fp = fopen("/dev/urandom", "r");
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rappor::UnixKernelRand irr_rand(fp);
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rappor::Deps deps(rappor::Md5, "client-secret", rappor::HmacSha256,
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irr_rand);
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rappor::Params params(32, // num_bits (k)
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2, // num_hashes (h)
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128, // num_cohorts (m)
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0.25, // probability f for PRR
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0.75, // probability p for IRR
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0.5); // probability q for IRR
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const char* encoder_id = "metric-name";
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rappor::Encoder encoder(encoder_id, params, deps);
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// Now use it to encode values. The 'out' value can be sent over the
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// network.
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rappor::Bits out;
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assert(encoder.EncodeString("foo", &out)); // returns false on error
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printf("'foo' encoded with RAPPOR: %0x, cohort %d\n", out, encoder.cohort());
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// Raw bits
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assert(encoder.EncodeBits(0x123, &out)); // returns false on error
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printf("0x123 encoded with RAPPOR: %0x, cohort %d\n", out, encoder.cohort());
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}
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