You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: oflag.go
    path of file: ./repos/wazero/internal/sysfs
    
    the code of the file until where you have to start completion: package sysfs

import (
	"os"

	"github.com/tetratelabs/wazero/experimental/sys"
)

// toOsOpenFlag converts the input to the flag parameter of os.OpenFile
func toOsOpenFlag(oflag sys.Oflag) (flag int) {
	// First flags are exclusive
	switch oflag & (sys.O_RDONLY | sys.O_RDWR | sys.O_WRONLY) {
	case sys.O_RDONLY:
		flag |= os.O_RDONLY
	case sys.O_RDWR:
		flag |= os.O_RDWR
	case sys.O_WRONLY:
		flag |= os.O_WRONLY
	}

	// Run down the flags defined in the os package
	if oflag&sys.O_APPEND != 0 {
		flag |= os.O_APPEND

    
func toOsOpenFlag(oflag sys.Oflag) (flag int) {
	// First flags are exclusive
	switch oflag & (sys.O_RDONLY | sys.O_RDWR | sys.O_WRONLY) {
	case sys.O_RDONLY:
		flag |= os.O_RDONLY
	case sys.O_RDWR:
		flag |= os.O_RDWR
	case sys.O_WRONLY:
		flag |= os.O_WRONLY
	}

	// Run down the flags defined in the os package
	if oflag&sys.O_APPEND != 0 {
		flag |= os.O_APPEND
	}
	if oflag&sys.O_CREAT != 0 {
		flag |= os.O_CREATE
	}
	if oflag&sys.O_EXCL != 0 {
		flag |= os.O_EXCL
	}
	if oflag&sys.O_SYNC != 0 {
		flag |= os.O_SYNC
	}
	if oflag&sys.O_TRUNC != 0 {
		flag |= os.O_TRUNC
	}
	return withSyscallOflag(oflag, flag)
}