// Copyright 2026 Versity Software
// This file is licensed under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

//go:build windows

package posix

import (
	"os"
	"syscall"
)

func openDataRead(name string, useODirect bool) (*os.File, error) {
	if useODirect {
		warnODirectUnsupportedOnce("openDataRead-windows", os.ErrInvalid)
	}

	ptr, err := syscall.UTF16PtrFromString(name)
	if err != nil {
		return nil, &os.PathError{Op: "open", Path: name, Err: err}
	}
	h, err := syscall.CreateFile(
		ptr,
		syscall.GENERIC_READ,
		syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE|syscall.FILE_SHARE_DELETE,
		nil,
		syscall.OPEN_EXISTING,
		syscall.FILE_ATTRIBUTE_NORMAL,
		0,
	)
	if err != nil {
		return nil, &os.PathError{Op: "open", Path: name, Err: err}
	}
	return os.NewFile(uintptr(h), name), nil
}