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// dirstate module
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//
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// Copyright 2019 Raphaël Gomès <rgomes@octobus.net>
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//
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// This software may be used and distributed according to the terms of the
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// GNU General Public License version 2 or any later version.
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use crate::errors::HgError;
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use crate::revlog::Node;
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use crate::{utils::hg_path::HgPathBuf, FastHashMap};
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use bytes_cast::{unaligned, BytesCast};
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use std::collections::hash_map;
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use std::convert::TryFrom;
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pub mod dirs_multiset;
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pub mod dirstate_map;
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pub mod parsers;
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pub mod status;
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#[derive(Debug, PartialEq, Clone, BytesCast)]
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#[repr(C)]
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pub struct DirstateParents {
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pub p1: Node,
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pub p2: Node,
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}
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/// The C implementation uses all signed types. This will be an issue
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/// either when 4GB+ source files are commonplace or in 2038, whichever
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/// comes first.
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#[derive(Debug, PartialEq, Copy, Clone)]
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pub struct DirstateEntry {
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pub state: EntryState,
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pub mode: i32,
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pub mtime: i32,
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pub size: i32,
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}
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#[derive(BytesCast)]
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#[repr(C)]
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struct RawEntry {
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state: u8,
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mode: unaligned::I32Be,
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size: unaligned::I32Be,
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mtime: unaligned::I32Be,
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length: unaligned::I32Be,
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}
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/// A `DirstateEntry` with a size of `-2` means that it was merged from the
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/// other parent. This allows revert to pick the right status back during a
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/// merge.
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pub const SIZE_FROM_OTHER_PARENT: i32 = -2;
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pub type StateMap = FastHashMap<HgPathBuf, DirstateEntry>;
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pub type StateMapIter<'a> = hash_map::Iter<'a, HgPathBuf, DirstateEntry>;
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pub type CopyMap = FastHashMap<HgPathBuf, HgPathBuf>;
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pub type CopyMapIter<'a> = hash_map::Iter<'a, HgPathBuf, HgPathBuf>;
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#[derive(Copy, Clone, Debug, Eq, PartialEq)]
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pub enum EntryState {
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Normal,
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Added,
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Removed,
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Merged,
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Unknown,
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}
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impl TryFrom<u8> for EntryState {
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type Error = HgError;
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fn try_from(value: u8) -> Result<Self, Self::Error> {
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match value {
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b'n' => Ok(EntryState::Normal),
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b'a' => Ok(EntryState::Added),
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b'r' => Ok(EntryState::Removed),
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b'm' => Ok(EntryState::Merged),
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b'?' => Ok(EntryState::Unknown),
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_ => Err(HgError::CorruptedRepository(format!(
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"Incorrect dirstate entry state {}",
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value
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))),
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}
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}
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}
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impl Into<u8> for EntryState {
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fn into(self) -> u8 {
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match self {
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EntryState::Normal => b'n',
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EntryState::Added => b'a',
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EntryState::Removed => b'r',
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EntryState::Merged => b'm',
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EntryState::Unknown => b'?',
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}
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}
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}
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