mirror of
https://github.com/dashpay/dash.git
synced 2024-12-28 21:42:47 +01:00
da33c9619c
* 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.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#include "util/testutil.h"
|
|
|
|
#include "util/random.h"
|
|
|
|
namespace leveldb {
|
|
namespace test {
|
|
|
|
Slice RandomString(Random* rnd, int len, std::string* dst) {
|
|
dst->resize(len);
|
|
for (int i = 0; i < len; i++) {
|
|
(*dst)[i] = static_cast<char>(' ' + rnd->Uniform(95)); // ' ' .. '~'
|
|
}
|
|
return Slice(*dst);
|
|
}
|
|
|
|
std::string RandomKey(Random* rnd, int len) {
|
|
// Make sure to generate a wide variety of characters so we
|
|
// test the boundary conditions for short-key optimizations.
|
|
static const char kTestChars[] = {'\0', '\1', 'a', 'b', 'c',
|
|
'd', 'e', '\xfd', '\xfe', '\xff'};
|
|
std::string result;
|
|
for (int i = 0; i < len; i++) {
|
|
result += kTestChars[rnd->Uniform(sizeof(kTestChars))];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
Slice CompressibleString(Random* rnd, double compressed_fraction, size_t len,
|
|
std::string* dst) {
|
|
int raw = static_cast<int>(len * compressed_fraction);
|
|
if (raw < 1) raw = 1;
|
|
std::string raw_data;
|
|
RandomString(rnd, raw, &raw_data);
|
|
|
|
// Duplicate the random data until we have filled "len" bytes
|
|
dst->clear();
|
|
while (dst->size() < len) {
|
|
dst->append(raw_data);
|
|
}
|
|
dst->resize(len);
|
|
return Slice(*dst);
|
|
}
|
|
|
|
} // namespace test
|
|
} // namespace leveldb
|