// Copyright 2018-2020 Georges Racinet <georges.racinet@octobus.net>

//           and Mercurial contributors

//

// This software may be used and distributed according to the terms of the

// GNU General Public License version 2 or any later version.

mod ancestors;

pub mod dagops;

pub use ancestors::{AncestorsIterator, LazyAncestors, MissingAncestors};

mod dirstate;

pub mod discovery;

pub mod testing; // unconditionally built, for use from integration tests

pub use dirstate::{

    dirs_multiset::{DirsMultiset, DirsMultisetIter},

    dirstate_map::DirstateMap,

    parsers::{pack_dirstate, parse_dirstate, PARENT_SIZE},

    status::{status, StatusResult},

    CopyMap, CopyMapIter, DirstateEntry, DirstateParents, EntryState,

    StateMap, StateMapIter,

};

mod filepatterns;

pub mod matchers;

pub mod revlog;

pub use revlog::*;

pub mod utils;

pub use filepatterns::{

    build_single_regex, read_pattern_file, PatternSyntax, PatternTuple,

};

use std::collections::HashMap;

use twox_hash::RandomXxHashBuilder64;

pub type LineNumber = usize;

/// Rust's default hasher is too slow because it tries to prevent collision

/// attacks. We are not concerned about those: if an ill-minded person has

/// write access to your repository, you have other issues.

pub type FastHashMap<K, V> = HashMap<K, V, RandomXxHashBuilder64>;

#[derive(Clone, Debug, PartialEq)]

pub enum DirstateParseError {

    TooLittleData,

    Overflow,

    CorruptedEntry(String),

    Damaged,

}

impl From<std::io::Error> for DirstateParseError {

    fn from(e: std::io::Error) -> Self {

        DirstateParseError::CorruptedEntry(e.to_string())

    }

}

impl ToString for DirstateParseError {

    fn to_string(&self) -> String {

        use crate::DirstateParseError::*;

        match self {

            TooLittleData => "Too little data for dirstate.".to_string(),

            Overflow => "Overflow in dirstate.".to_string(),

            CorruptedEntry(e) => format!("Corrupted entry: {:?}.", e),

            Damaged => "Dirstate appears to be damaged.".to_string(),

        }

    }

}

#[derive(Debug, PartialEq)]

pub enum DirstatePackError {

    CorruptedEntry(String),

    CorruptedParent,

    BadSize(usize, usize),

}

impl From<std::io::Error> for DirstatePackError {

    fn from(e: std::io::Error) -> Self {

        DirstatePackError::CorruptedEntry(e.to_string())

    }

}

#[derive(Debug, PartialEq)]

pub enum DirstateMapError {

    PathNotFound(HgPathBuf),

    EmptyPath,

}

impl ToString for DirstateMapError {

    fn to_string(&self) -> String {

        match self {

            }

        }

    }

}

pub enum DirstateError {

    Parse(DirstateParseError),

    Pack(DirstatePackError),

    Map(DirstateMapError),

    IO(std::io::Error),

}

impl From<DirstateParseError> for DirstateError {

    fn from(e: DirstateParseError) -> Self {

        DirstateError::Parse(e)

    }

}

impl From<DirstatePackError> for DirstateError {

    fn from(e: DirstatePackError) -> Self {

        DirstateError::Pack(e)

    }

}

#[derive(Debug)]

pub enum PatternError {

    UnsupportedSyntax(String),

}

#[derive(Debug)]

pub enum PatternFileError {

    IO(std::io::Error),

    Pattern(PatternError, LineNumber),

}

impl From<std::io::Error> for PatternFileError {

    fn from(e: std::io::Error) -> Self {

        PatternFileError::IO(e)

    }

}

impl From<DirstateMapError> for DirstateError {

    fn from(e: DirstateMapError) -> Self {

        DirstateError::Map(e)

    }

}

impl From<std::io::Error> for DirstateError {

    fn from(e: std::io::Error) -> Self {

        DirstateError::IO(e)

    }

}