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|
use super::*;
/// Options and flags used to configure how a registry key is opened.
#[derive(Debug)]
pub struct OpenOptions<'a> {
parent: &'a Key,
access: u32,
create: bool,
transaction: Option<&'a Transaction>,
options: u32,
}
impl<'a> OpenOptions<'a> {
pub(crate) fn new(parent: &'a Key) -> Self {
Self {
parent,
access: 0,
create: false,
transaction: None,
options: REG_OPTION_NON_VOLATILE,
}
}
/// Sets the option for read access.
pub fn read(&mut self) -> &mut Self {
self.access |= KEY_READ;
self
}
/// Sets the option for write access.
pub fn write(&mut self) -> &mut Self {
self.access |= KEY_WRITE;
self
}
/// Sets additional access rights.
pub fn access(&mut self, access: u32) -> &mut Self {
self.access |= access;
self
}
/// Sets the option to create a new registry key, or open it if it already exists.
pub fn create(&mut self) -> &mut Self {
self.create = true;
self
}
/// Associate the registry key with a transaction.
pub fn transaction(&mut self, transaction: &'a Transaction) -> &mut Self {
self.transaction = Some(transaction);
self
}
/// Sets the option to create a volatile registry key that is not preserved when the system restarts.
pub fn volatile(&mut self) -> &mut Self {
self.options |= REG_OPTION_VOLATILE;
self
}
/// Opens a registry key with the options provided by `self`.
pub fn open<T: AsRef<str>>(&self, path: T) -> Result<Key> {
let mut handle = null_mut();
let result = unsafe {
if let Some(transaction) = self.transaction {
if self.create {
RegCreateKeyTransactedW(
self.parent.0,
pcwstr(path).as_ptr(),
0,
null(),
self.options,
self.access,
null(),
&mut handle,
null_mut(),
transaction.0,
null(),
)
} else {
RegOpenKeyTransactedW(
self.parent.0,
pcwstr(path).as_ptr(),
0,
self.access,
&mut handle,
transaction.0,
null(),
)
}
} else if self.create {
RegCreateKeyExW(
self.parent.0,
pcwstr(path).as_ptr(),
0,
null(),
self.options,
self.access,
null(),
&mut handle,
null_mut(),
)
} else {
RegOpenKeyExW(
self.parent.0,
pcwstr(path).as_ptr(),
0,
self.access,
&mut handle,
)
}
};
win32_error(result).map(|_| Key(handle))
}
}
|
