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///! Utility macros
macro_rules! next {
($bytes:ident) => ({
match $bytes.next() {
Some(b) => b,
None => return Ok(Status::Partial)
}
})
}
macro_rules! expect {
($bytes:ident.next() == $pat:pat => $ret:expr) => {
expect!(next!($bytes) => $pat |? $ret)
};
($e:expr => $pat:pat |? $ret:expr) => {
match $e {
v@$pat => v,
_ => return $ret
}
};
}
macro_rules! complete {
($e:expr) => {
match $e? {
Status::Complete(v) => v,
Status::Partial => return Ok(Status::Partial)
}
}
}
macro_rules! byte_map {
($($flag:expr,)*) => ([
$($flag != 0,)*
])
}
macro_rules! space {
($bytes:ident or $err:expr) => ({
expect!($bytes.next() == b' ' => Err($err));
$bytes.slice();
})
}
macro_rules! newline {
($bytes:ident) => ({
match next!($bytes) {
b'\r' => {
expect!($bytes.next() == b'\n' => Err(Error::NewLine));
$bytes.slice();
},
b'\n' => {
$bytes.slice();
},
_ => return Err(Error::NewLine)
}
})
}