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// Copyright Epic Games, Inc. All Rights Reserved.
#include "zenstore/basicfile.h"
#include <zencore/except.h>
#include <zencore/filesystem.h>
#include <zencore/fmtutils.h>
#include <fmt/format.h>
#include <gsl/gsl-lite.hpp>
namespace zen {
using namespace fmt::literals;
void
BasicFile::Open(std::filesystem::path FileName, bool isCreate)
{
const DWORD dwCreationDisposition = isCreate ? CREATE_ALWAYS : OPEN_EXISTING;
HRESULT hRes = m_File.Create(FileName.c_str(), GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, dwCreationDisposition);
if (FAILED(hRes))
{
ThrowSystemException(hRes, "Failed to open bucket sobs file '{}'"_format(FileName));
}
}
void
BasicFile::Read(void* Data, uint64_t Size, uint64_t Offset)
{
OVERLAPPED Ovl{};
Ovl.Offset = DWORD(Offset & 0xffff'ffffu);
Ovl.OffsetHigh = DWORD(Offset >> 32);
HRESULT hRes = m_File.Read(Data, gsl::narrow<DWORD>(Size), &Ovl);
if (FAILED(hRes))
{
ThrowSystemException(hRes, "Failed to read from file '{}'"_format(zen::PathFromHandle(m_File)));
}
}
IoBuffer
BasicFile::ReadAll()
{
IoBuffer Buffer(FileSize());
Read((void*)Buffer.Data(), Buffer.Size(), 0);
return Buffer;
}
void
BasicFile::Write(const void* Data, uint64_t Size, uint64_t Offset)
{
OVERLAPPED Ovl{};
Ovl.Offset = DWORD(Offset & 0xffff'ffffu);
Ovl.OffsetHigh = DWORD(Offset >> 32);
HRESULT hRes = m_File.Write(Data, gsl::narrow<DWORD>(Size), &Ovl);
if (FAILED(hRes))
{
ThrowSystemException(hRes, "Failed to write to file '{}'"_format(zen::PathFromHandle(m_File)));
}
}
void
BasicFile::Flush()
{
m_File.Flush();
}
uint64_t
BasicFile::FileSize()
{
ULONGLONG Sz;
m_File.GetSize(Sz);
return uint64_t(Sz);
}
void
BasicFile::Close()
{
m_File.Close();
}
} // namespace zen
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