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Utils/File: add PRead(), PWrite() and Size()

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Because PRead/PWrite don't have the same side effects on the file cursor
between Linux and Windows (:/), make them all-or-nothing.
This commit is contained in:
Pierre-Loup A. Griffais committed 2026-08-21 11:16:07 -07:00
1 parent c1e9d19809
commit efc5eaf9c7
2 files changed
+107 -7
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Source/Windows/Common/WinAPI/IO.cpp
+29 -4
View File
@@ -111,10 +111,16 @@ DLLEXPORT_FUNC(HANDLE, CreateFileW,
DLLEXPORT_FUNC(WINBOOL, WriteFile,
(HANDLE hFile, const void* lpBuffer, DWORD nNumberOfBytesToWrite, LPDWORD lpNumberOfBytesWritten, LPOVERLAPPED lpOverlapped)) {
IO_STATUS_BLOCK IOSB;
LARGE_INTEGER ByteOffset;
PLARGE_INTEGER ByteOffsetPtr = nullptr;
if (lpOverlapped) {
UNIMPLEMENTED();
if (lpOverlapped->hEvent) {
UNIMPLEMENTED();
}
ByteOffset.QuadPart = (static_cast<LONGLONG>(lpOverlapped->OffsetHigh) << 32) | lpOverlapped->Offset;
ByteOffsetPtr = &ByteOffset;
}
NTSTATUS Status = NtWriteFile(hFile, nullptr, nullptr, nullptr, &IOSB, lpBuffer, nNumberOfBytesToWrite, nullptr, nullptr);
NTSTATUS Status = NtWriteFile(hFile, nullptr, nullptr, nullptr, &IOSB, lpBuffer, nNumberOfBytesToWrite, ByteOffsetPtr, nullptr);
if (lpNumberOfBytesWritten) {
*lpNumberOfBytesWritten = static_cast<DWORD>(IOSB.Information);
}
@@ -135,6 +141,18 @@ DLLEXPORT_FUNC(WINBOOL, WriteConsoleW,
UNIMPLEMENTED();
}
DLLEXPORT_FUNC(WINBOOL, GetFileSizeEx, (HANDLE hFile, PLARGE_INTEGER lpFileSize)) {
IO_STATUS_BLOCK IOSB;
FILE_STANDARD_INFORMATION StandardInfo;
if (NTSTATUS Status = NtQueryInformationFile(hFile, &IOSB, &StandardInfo, sizeof(StandardInfo), FileStandardInformation); Status) {
return WinAPIReturn(Status);
}
if (lpFileSize) {
*lpFileSize = StandardInfo.EndOfFile;
}
return true;
}
DLLEXPORT_FUNC(WINBOOL, SetFilePointerEx, (HANDLE hFile, LARGE_INTEGER liDistanceToMove, PLARGE_INTEGER lpNewFilePointer, DWORD dwMoveMethod)) {
IO_STATUS_BLOCK IOSB;
FILE_POSITION_INFORMATION PositionInfo;
@@ -173,10 +191,17 @@ DLLEXPORT_FUNC(WINBOOL, SetFilePointerEx, (HANDLE hFile, LARGE_INTEGER liDistanc
DLLEXPORT_FUNC(WINBOOL, ReadFile,
(HANDLE hFile, void* lpBuffer, DWORD nNumberOfBytesToRead, LPDWORD lpNumberOfBytesRead, LPOVERLAPPED lpOverlapped)) {
IO_STATUS_BLOCK IOSB;
LARGE_INTEGER ByteOffset;
PLARGE_INTEGER ByteOffsetPtr = nullptr;
if (lpOverlapped) {
UNIMPLEMENTED();
if (lpOverlapped->hEvent) {
// no actual async-overlapped, just enough for PRead
UNIMPLEMENTED();
}
ByteOffset.QuadPart = (static_cast<LONGLONG>(lpOverlapped->OffsetHigh) << 32) | lpOverlapped->Offset;
ByteOffsetPtr = &ByteOffset;
}
NTSTATUS Status = NtReadFile(hFile, nullptr, nullptr, nullptr, &IOSB, lpBuffer, nNumberOfBytesToRead, nullptr, nullptr);
NTSTATUS Status = NtReadFile(hFile, nullptr, nullptr, nullptr, &IOSB, lpBuffer, nNumberOfBytesToRead, ByteOffsetPtr, nullptr);
if (lpNumberOfBytesRead) {
*lpNumberOfBytesRead = static_cast<DWORD>(IOSB.Information);
}