comparison rust/hg-core/src/dirstate/entry.rs @ 48139:ab5a7fdbf75c

dirstate-v2: Store a bitfield on disk instead of v1-like state

Differential Revision: https://phab.mercurial-scm.org/D11558

48138:38488d488ec1

/// The C implementation uses all signed types. This will be an issue
/// either when 4GB+ source files are commonplace or in 2038, whichever
/// comes first.
#[derive(Debug, PartialEq, Copy, Clone)]
pub struct DirstateEntry {
    flags: Flags,
    mode_size: Option<(i32, i32)>,
    mtime: Option<i32>,
}

bitflags! {
    struct Flags: u8 {
        const WDIR_TRACKED = 1 << 0;
        const P1_TRACKED = 1 << 1;
        const P2_INFO = 1 << 2;
    }
}

/// A special value used for internal representation of special case in
/// dirstate v1 format.
pub const SIZE_NON_NORMAL: i32 = -1;

impl DirstateEntry {
    pub fn new(
        wdir_tracked: bool,
        p1_tracked: bool,
        p2_info: bool,
        mode_size: Option<(i32, i32)>,
        mtime: Option<i32>,

        self.flags.intersects(
            Flags::WDIR_TRACKED | Flags::P1_TRACKED | Flags::P2_INFO,
        )
    }

    fn v1_state(&self) -> EntryState {
        if !self.any_tracked() {
            // TODO: return an Option instead?
            panic!("Accessing v1_state of an untracked DirstateEntry")
        }

48139:ab5a7fdbf75c

/// The C implementation uses all signed types. This will be an issue
/// either when 4GB+ source files are commonplace or in 2038, whichever
/// comes first.
#[derive(Debug, PartialEq, Copy, Clone)]
pub struct DirstateEntry {
    pub(crate) flags: Flags,
    mode_size: Option<(i32, i32)>,
    mtime: Option<i32>,
}

bitflags! {
    pub(crate) struct Flags: u8 {
        const WDIR_TRACKED = 1 << 0;
        const P1_TRACKED = 1 << 1;
        const P2_INFO = 1 << 2;
    }
}

/// A special value used for internal representation of special case in
/// dirstate v1 format.
pub const SIZE_NON_NORMAL: i32 = -1;

impl DirstateEntry {
    pub fn from_v2_data(
        wdir_tracked: bool,
        p1_tracked: bool,
        p2_info: bool,
        mode_size: Option<(i32, i32)>,
        mtime: Option<i32>,

        self.flags.intersects(
            Flags::WDIR_TRACKED | Flags::P1_TRACKED | Flags::P2_INFO,
        )
    }

    /// Returns `(wdir_tracked, p1_tracked, p2_info, mode_size, mtime)`
    pub(crate) fn v2_data(
        &self,
    ) -> (bool, bool, bool, Option<(i32, i32)>, Option<i32>) {
        if !self.any_tracked() {
            // TODO: return an Option instead?
            panic!("Accessing v1_state of an untracked DirstateEntry")
        }
        let wdir_tracked = self.flags.contains(Flags::WDIR_TRACKED);
        let p1_tracked = self.flags.contains(Flags::P1_TRACKED);
        let p2_info = self.flags.contains(Flags::P2_INFO);
        let mode_size = self.mode_size;
        let mtime = self.mtime;
        (wdir_tracked, p1_tracked, p2_info, mode_size, mtime)
    }

    fn v1_state(&self) -> EntryState {
        if !self.any_tracked() {
            // TODO: return an Option instead?
            panic!("Accessing v1_state of an untracked DirstateEntry")
        }