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use super::change_id::*;
use super::vertex::*;
use super::L64;
bitflags! {
#[derive(Serialize, Deserialize)]
pub struct EdgeFlags: u8 {
const BLOCK = 1;
const PSEUDO = 4;
const FOLDER = 16;
const PARENT = 32;
const DELETED = 128;
}
}
impl EdgeFlags {
#[inline]
pub(crate) fn db() -> Self {
Self::DELETED | Self::BLOCK
}
#[inline]
pub(crate) fn bp() -> Self {
Self::BLOCK | Self::PARENT
}
#[inline]
pub(crate) fn pseudof() -> Self {
Self::PSEUDO | Self::FOLDER
}
#[inline]
pub(crate) fn alive_children() -> Self {
Self::BLOCK | Self::PSEUDO | Self::FOLDER
}
#[inline]
pub(crate) fn parent_folder() -> Self {
Self::PARENT | Self::FOLDER
}
#[inline]
pub(crate) fn is_deleted(&self) -> bool {
self.contains(EdgeFlags::DELETED)
}
#[inline]
pub fn is_alive_parent(&self) -> bool {
*self & (EdgeFlags::DELETED | EdgeFlags::PARENT) == EdgeFlags::PARENT
}
#[inline]
pub(crate) fn is_parent(&self) -> bool {
self.contains(EdgeFlags::PARENT)
}
#[inline]
pub(crate) fn is_folder(&self) -> bool {
self.contains(EdgeFlags::FOLDER)
}
#[inline]
pub(crate) fn is_block(&self) -> bool {
self.contains(EdgeFlags::BLOCK)
}
}
#[derive(Clone, Copy, Debug, PartialEq, PartialOrd, Eq, Ord, Hash)]
#[doc(hidden)]
pub struct Edge {
pub flag: EdgeFlags,
pub dest: Position<ChangeId>,
pub introduced_by: ChangeId,
}
#[derive(Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Hash)]
pub struct SerializedEdge([super::L64; 3]);
impl std::fmt::Debug for SerializedEdge {
fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
let pos = self.dest();
use super::Base32;
write!(
fmt,
"E({:?}, {}[{}], {})",
self.flag(),
pos.change.to_base32(),
(pos.pos.0).0,
self.introduced_by().to_base32()
)
}
}
impl std::ops::SubAssign<EdgeFlags> for SerializedEdge {
fn sub_assign(&mut self, e: EdgeFlags) {
let ref mut f = (self.0)[0];
f.0 = ((u64::from_le(f.0)) & !((e.bits() as u64) << 56)).to_le()
}
}
impl SerializedEdge {
pub fn flag(&self) -> EdgeFlags {
let f = u64::from_le((self.0)[0].0);
EdgeFlags::from_bits((f >> 56) as u8).unwrap()
}
pub fn dest(&self) -> Position<ChangeId> {
let pos = u64::from_le((self.0[0]).0);
Position {
change: ChangeId((self.0)[1]),
pos: ChangePosition(L64((pos & 0xffffffffffffff).to_le())),
}
}
pub fn introduced_by(&self) -> ChangeId {
ChangeId((self.0)[2])
}
}
impl From<SerializedEdge> for Edge {
fn from(s: SerializedEdge) -> Edge {
Edge {
flag: s.flag(),
dest: s.dest(),
introduced_by: s.introduced_by(),
}
}
}
impl From<Edge> for SerializedEdge {
fn from(s: Edge) -> SerializedEdge {
let pos = u64::from_le((s.dest.pos.0).0);
assert!(pos < 1 << 56);
SerializedEdge([
(((s.flag.bits() as u64) << 56) | pos).into(),
s.dest.change.0,
s.introduced_by.0,
])
}
}
impl<'a> From<&'a SerializedEdge> for Edge {
fn from(s: &'a SerializedEdge) -> Edge {
Edge {
flag: s.flag(),
dest: s.dest(),
introduced_by: s.introduced_by(),
}
}
}
impl SerializedEdge {
pub fn empty(dest: Position<ChangeId>, intro: ChangeId) -> Self {
SerializedEdge([dest.pos.0, dest.change.0, intro.0])
}
pub fn new(flag: EdgeFlags, change: ChangeId, pos: ChangePosition, intro: ChangeId) -> Self {
let pos = u64::from_le((pos.0).0);
assert!(pos < 1 << 56);
SerializedEdge([
(pos | ((flag.bits() as u64) << 56)).into(),
change.0,
intro.0,
])
}
}