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use bstr::BString;
use crate::{
extension::{FsMonitor, Signature},
util::{read_u32, read_u64, split_at_byte_exclusive},
};
#[derive(Clone)]
pub enum Token {
V1 { nanos_since_1970: u64 },
V2 { token: BString },
}
pub const SIGNATURE: Signature = *b"FSMN";
pub fn decode(data: &[u8]) -> Option<FsMonitor> {
let (version, data) = read_u32(data)?;
let (token, data) = match version {
1 => {
let (nanos_since_1970, data) = read_u64(data)?;
(Token::V1 { nanos_since_1970 }, data)
}
2 => {
let (token, data) = split_at_byte_exclusive(data, 0)?;
(Token::V2 { token: token.into() }, data)
}
_ => return None,
};
let (ewah_size, data) = read_u32(data)?;
let (entry_dirty, data) = gix_bitmap::ewah::decode(&data[..ewah_size as usize]).ok()?;
if !data.is_empty() {
return None;
}
FsMonitor { token, entry_dirty }.into()
}
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