jeanlemotan
76 lines
1.6 KiB
C++
76 lines
1.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Copyright (c) Lewis Baker
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// Licenced under MIT license. See LICENSE.txt for details.
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///////////////////////////////////////////////////////////////////////////////
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#include <cppcoro/writable_file.hpp>
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#include <system_error>
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#if CPPCORO_OS_WINNT
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# ifndef WIN32_LEAN_AND_MEAN
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# define WIN32_LEAN_AND_MEAN
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# endif
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# include <Windows.h>
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void cppcoro::writable_file::set_size(
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std::uint64_t fileSize)
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{
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LARGE_INTEGER position;
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position.QuadPart = fileSize;
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BOOL ok = ::SetFilePointerEx(m_fileHandle.handle(), position, nullptr, FILE_BEGIN);
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if (!ok)
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{
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DWORD errorCode = ::GetLastError();
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throw std::system_error
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{
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static_cast<int>(errorCode),
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std::system_category(),
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"error setting file size: SetFilePointerEx"
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};
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}
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ok = ::SetEndOfFile(m_fileHandle.handle());
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if (!ok)
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{
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DWORD errorCode = ::GetLastError();
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throw std::system_error
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{
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static_cast<int>(errorCode),
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std::system_category(),
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"error setting file size: SetEndOfFile"
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};
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}
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}
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cppcoro::file_write_operation cppcoro::writable_file::write(
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std::uint64_t offset,
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const void* buffer,
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std::size_t byteCount) noexcept
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{
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return file_write_operation{
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m_fileHandle.handle(),
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offset,
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buffer,
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byteCount
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};
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}
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cppcoro::file_write_operation_cancellable cppcoro::writable_file::write(
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std::uint64_t offset,
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const void* buffer,
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std::size_t byteCount,
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cancellation_token ct) noexcept
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{
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return file_write_operation_cancellable{
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m_fileHandle.handle(),
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offset,
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buffer,
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byteCount,
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std::move(ct)
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};
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}
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#endif
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