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* Update to leveldb upstream using subtree merge * Import crc32c using subtree merge as as 'src/crc32c' * build: Update build system for new leveldb Upstream leveldb switched build systems, which means we need to define a few different values. Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com> * doc: Add crc32c subtree to developer notes * test: Add crc32c to subtree check linter * test: Add crc32c exception to various linters and generation scripts * build: Add LCOV exception for crc32c Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com> * build: CRC32C build system integration Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "util/testutil.h"
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#include "util/random.h"
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namespace leveldb {
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namespace test {
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Slice RandomString(Random* rnd, int len, std::string* dst) {
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dst->resize(len);
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for (int i = 0; i < len; i++) {
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(*dst)[i] = static_cast<char>(' ' + rnd->Uniform(95)); // ' ' .. '~'
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}
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return Slice(*dst);
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}
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std::string RandomKey(Random* rnd, int len) {
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// Make sure to generate a wide variety of characters so we
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// test the boundary conditions for short-key optimizations.
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static const char kTestChars[] = {'\0', '\1', 'a', 'b', 'c',
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'd', 'e', '\xfd', '\xfe', '\xff'};
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std::string result;
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for (int i = 0; i < len; i++) {
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result += kTestChars[rnd->Uniform(sizeof(kTestChars))];
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}
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return result;
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}
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Slice CompressibleString(Random* rnd, double compressed_fraction, size_t len,
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std::string* dst) {
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int raw = static_cast<int>(len * compressed_fraction);
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if (raw < 1) raw = 1;
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std::string raw_data;
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RandomString(rnd, raw, &raw_data);
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// Duplicate the random data until we have filled "len" bytes
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dst->clear();
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while (dst->size() < len) {
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dst->append(raw_data);
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}
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dst->resize(len);
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return Slice(*dst);
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}
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} // namespace test
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} // namespace leveldb
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