53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
// Copyright 2020 Google LLC
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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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#include <string.h>
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#include <iostream>
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#include <random>
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#include "crc32c.h"
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extern "C" {
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uint32_t crc32c_hw(const char *, size_t);
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uint32_t crc32c_sw(const char *, size_t);
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}
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const int MINSIZE = 1;
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const int MAXSIZE = 1048576;
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int main(int argc, char **argv) {
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#if defined(__x86_64__) || defined(__i386__)
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std::knuth_b rndeng((std::random_device()()));
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std::uniform_int_distribution<int> size_dist(MINSIZE, MAXSIZE);
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std::uniform_int_distribution<int> d_dist(0, 255);
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std::string buf;
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for (int i = 0; i < 100; i++) {
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size_t len = size_dist(rndeng);
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buf.resize(len);
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for (size_t j = 0; j < len; j++) {
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buf[j] = d_dist(rndeng);
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}
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uint32_t crc_hw = crc32c_hw(buf.data(), len);
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uint32_t crc_sw = crc32c_sw(buf.data(), len);
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if (crc_hw != crc_sw) {
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fprintf(stderr, "crc mismatch: hw 0x%08x vs sw 0x%08x buffer len %ld\n",
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crc_hw, crc_sw, len);
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}
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buf.clear();
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}
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#endif // defined(__x86_64__) || defined(__i386__)
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return 0;
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}
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