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// Copyright Epic Games, Inc. All Rights Reserved.
#include "zencore/testutils.h"
#if ZEN_WITH_TESTS
# include <zencore/filesystem.h>
# include <zencore/session.h>
# include "zencore/string.h"
# include <atomic>
namespace zen {
static std::atomic<int> Sequence{0};
std::filesystem::path
CreateTemporaryDirectory()
{
std::error_code Ec;
std::filesystem::path DirPath = std::filesystem::temp_directory_path() / GetSessionIdString() / IntNum(++Sequence).c_str();
DeleteDirectories(DirPath, Ec);
CreateDirectories(DirPath);
return DirPath;
}
ScopedTemporaryDirectory::ScopedTemporaryDirectory() : m_RootPath(CreateTemporaryDirectory())
{
}
ScopedTemporaryDirectory::ScopedTemporaryDirectory(std::filesystem::path Directory) : m_RootPath(Directory)
{
std::error_code Ec;
DeleteDirectories(Directory, Ec);
CreateDirectories(Directory);
}
ScopedTemporaryDirectory::~ScopedTemporaryDirectory()
{
std::error_code Ec;
DeleteDirectories(m_RootPath, Ec);
}
IoBuffer
CreateRandomBlob(uint64_t Size)
{
static uint64_t Seed{0x7CEBF54E45B9F5D1};
auto Next = [](uint64_t& seed) {
uint64_t z = (seed += UINT64_C(0x9E3779B97F4A7C15));
z = (z ^ (z >> 30)) * UINT64_C(0xBF58476D1CE4E5B9);
z = (z ^ (z >> 27)) * UINT64_C(0x94D049BB133111EB);
return z ^ (z >> 31);
};
IoBuffer Data(Size);
uint64_t* DataPtr = reinterpret_cast<uint64_t*>(Data.MutableData());
while (Size > sizeof(uint64_t))
{
*DataPtr++ = Next(Seed);
Size -= sizeof(uint64_t);
}
uint64_t ByteNext = Next(Seed);
uint8_t* ByteDataPtr = reinterpret_cast<uint8_t*>(DataPtr);
while (Size > 0)
{
*ByteDataPtr++ = static_cast<uint8_t>(ByteNext & 0xff);
ByteNext >>= 8;
Size--;
}
return Data;
};
IoBuffer
CreateSemiRandomBlob(uint64_t Size)
{
IoBuffer Result(Size);
const size_t PartCount = (Size / (1u * 1024u * 64)) + 1;
const size_t PartSize = Size / PartCount;
auto Part = CreateRandomBlob(PartSize);
auto Remain = Result.GetMutableView().CopyFrom(Part.GetView());
while (Remain.GetSize() >= PartSize)
{
Remain = Remain.CopyFrom(Part.GetView());
}
if (Remain.GetSize() > 0)
{
auto RemainBuffer = CreateRandomBlob(Remain.GetSize());
Remain.CopyFrom(RemainBuffer.GetView());
}
return Result;
};
} // namespace zen
#endif // ZEN_WITH_TESTS
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