otter_support/
keydata.rs

1// Copyright 2020-2021 Ian Jackson and contributors to Otter
2// SPDX-License-Identifier: AGPL-3.0-or-later
3// There is NO WARRANTY.
4
5#![allow(clippy::many_single_char_names)]
6
7use crate::prelude::*;
8
9type SKD = slotmap::KeyData;
10
11#[macro_export]
12macro_rules! display_consequential_impls {
13  ( $x:path ) => {
14    impl From<$x> for String {
15      fn from(p: $x) -> String { format!("{}",p) }
16    }
17    impl Debug for $x {
18      fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
19        <Self as Display>::fmt(self, f)
20      }
21    }
22  }
23}
24pub use crate::display_consequential_impls; // this is madness!
25
26#[throws(AE)]
27pub fn slotkey_parse(s: &str, sep: u8) -> SKD {
28  if s.as_bytes() == [b'0', sep, b'0', b'0'] { return default() }
29  let sep: char = sep.into();
30  let e = || anyhow!("could not deserialise visibile piece id");
31  let mut i = s.splitn(2, sep).map(|s| s.parse().map_err(|_| e()));
32  let l: u32 = i.next().ok_or_else(e)??;
33  let h: u32 = i.next().ok_or_else(e)??;
34  let v = ((h as u64) << 32) | (l as u64);
35  SKD::from_ffi(v)
36}
37
38#[throws(fmt::Error)]
39pub fn slotkey_write(k: SKD, sep: u8, f: &mut fmt::Formatter) {
40  let sep: char = sep.into();
41  if k == default() { write!(f, "0{}00", sep)?; return; }
42  let v = k.as_ffi();
43  write!(f, "{}{}{}", v & 0xffffffff, sep, v >> 32)?
44}
45
46#[macro_export]
47macro_rules! visible_slotmap_key {
48  ( $x:ident($sep:expr) ) => {
49
50    #[derive(Copy,Default,Clone,Eq,PartialEq,Ord,PartialOrd,Serialize,Deserialize,Hash)]
51    #[serde(into="String")]
52    #[serde(try_from="String")]
53    pub struct $x(pub slotmap::KeyData);
54
55    impl_for_slotmap_key!($x($sep));
56    hformat_as_display!{$x}
57  }
58}
59#[macro_export]
60macro_rules! impl_for_slotmap_key {
61  ( $x:ident($sep:expr) ) => {
62    impl Display for $x {
63      #[throws(fmt::Error)]
64      fn fmt(&self, f: &mut fmt::Formatter) { slotkey_write(self.0,$sep,f)? }
65    }
66
67    impl TryFrom<&str> for $x {
68      type Error = AE;
69      #[throws(AE)]
70      fn try_from(s: &str) -> $x { $x(slotkey_parse(s,$sep)?) }
71    }
72    impl TryFrom<String> for $x {
73      type Error = AE;
74      #[throws(AE)]
75      fn try_from(s: String) -> $x { $x(slotkey_parse(&s,$sep)?) }
76    }
77
78    impl slotmap::Key for $x {
79      fn data(&self) -> slotmap::KeyData { self.0 }
80    }
81    impl From<slotmap::KeyData> for $x {
82      fn from(d: slotmap::KeyData) -> Self { $x(d) }
83    }
84    impl From<$x> for slotmap::KeyData {
85      fn from(p: $x) -> Self {
86        p.0
87      }
88    }
89
90    display_consequential_impls!{$x}
91  }
92}
93pub use crate::visible_slotmap_key; // this is madness!
94pub use crate::impl_for_slotmap_key; // this is madness!
otter_support/keydata.rs

otter_support/
keydata.rs
