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jid: Make the crate no_std

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Only std::error::Error is missing in this mode, but that’s only waiting
for its stabilisation, see this issue:
https://github.com/rust-lang/rust/issues/103765
This commit is contained in:
Emmanuel Gil Peyrot 2024-04-25 21:18:39 +02:00 • committed by pep
commit 48f77acb69
4 changed files with 35 additions and 17 deletions
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33
jid/src/lib.rs
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@ -8,6 +8,7 @@
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#![no_std]
#![deny(missing_docs)]
//! Represents XMPP addresses, also known as JabberIDs (JIDs) for the [XMPP](https://xmpp.org/)
@ -30,13 +31,22 @@
//! - stringprep error: some characters were invalid according to the stringprep algorithm, such as
//! mixing left-to-write and right-to-left characters
extern crate alloc;
#[cfg(any(feature = "std", test))]
extern crate std;
use alloc::borrow::Cow;
use alloc::format;
use alloc::string::{String, ToString};
use core::borrow::Borrow;
use core::cmp::Ordering;
use core::fmt;
use core::hash::{Hash, Hasher};
use core::mem;
use core::num::NonZeroU16;
use std::borrow::{Borrow, Cow};
use std::cmp::Ordering;
use std::fmt;
use std::hash::{Hash, Hasher};
use std::ops::Deref;
use std::str::FromStr;
use core::ops::Deref;
use core::str::FromStr;
use memchr::memchr;
@ -364,13 +374,13 @@ impl Jid {
Ok(unsafe {
// SAFETY: FullJid is #[repr(transparent)] of Jid
// SOUNDNESS: we asserted that self.slash is set above
std::mem::transmute::<&Jid, &FullJid>(self)
mem::transmute::<&Jid, &FullJid>(self)
})
} else {
Err(unsafe {
// SAFETY: BareJid is #[repr(transparent)] of Jid
// SOUNDNESS: we asserted that self.slash is unset above
std::mem::transmute::<&Jid, &BareJid>(self)
mem::transmute::<&Jid, &BareJid>(self)
})
}
}
@ -383,13 +393,13 @@ impl Jid {
Ok(unsafe {
// SAFETY: FullJid is #[repr(transparent)] of Jid
// SOUNDNESS: we asserted that self.slash is set above
std::mem::transmute::<&mut Jid, &mut FullJid>(self)
mem::transmute::<&mut Jid, &mut FullJid>(self)
})
} else {
Err(unsafe {
// SAFETY: BareJid is #[repr(transparent)] of Jid
// SOUNDNESS: we asserted that self.slash is unset above
std::mem::transmute::<&mut Jid, &mut BareJid>(self)
mem::transmute::<&mut Jid, &mut BareJid>(self)
})
}
}
@ -865,10 +875,11 @@ mod tests {
use super::*;
use std::collections::{HashMap, HashSet};
use std::vec::Vec;
macro_rules! assert_size (
($t:ty, $sz:expr) => (
assert_eq!(::std::mem::size_of::<$t>(), $sz);
assert_eq!(::core::mem::size_of::<$t>(), $sz);
);
);