18041364878

Committed 26 Sep 2025 02:56PM UTC coverage: 43.537% (+1.7%) from 41.837%

Build # 18041364878

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push

github

Committed by

vigna

Commit Message

fmt

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80.77

/epserde/src/impls/string.rs

/*
 * SPDX-FileCopyrightText: 2023 Inria
 * SPDX-FileCopyrightText: 2023 Sebastiano Vigna
 *
 * SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
 */

//! Implementations for strings.
//!
//! All string types have the same serialization type, `Box<str>`, and the same
//! deserialization type, `&str`. Thus, you can serialize a `String` and fully
//! deserialize it as `Box<str>`.
//!
//! Similarly to the case of [slices](crate::impls::slice), there is
//! a convenience [`SerInner`] implementation for `&str` that
//! serializes it as `Box<str>`.
//!
//! We provide type hashes for `String` and `str` so that they can be used
//! in [`PhantomData`](core::marker::PhantomData).

use crate::prelude::*;
use core::hash::Hash;
use deser::*;
use ser::*;

#[cfg(not(feature = "std"))]
use alloc::boxed::Box;

unsafe impl CopyType for String {
    type Copy = Deep;
}

#[cfg(not(feature = "std"))]
use alloc::string::String;

// For use with PhantomData
impl TypeHash for String {
    fn type_hash(hasher: &mut impl core::hash::Hasher) {
        "String".hash(hasher);
    }
}

impl SerInner for String {
    type SerType = Box<str>;
    const IS_ZERO_COPY: bool = false;
    const ZERO_COPY_MISMATCH: bool = false;

    unsafe fn _ser_inner(&self, backend: &mut impl WriteWithNames) -> ser::Result<()> {
        ser_slice_zero(backend, self.as_bytes())
    }
}

impl DeserInner for String {
    unsafe fn _deser_full_inner(backend: &mut impl ReadWithPos) -> deser::Result<Self> {
        let slice = unsafe { deser_full_vec_zero(backend) }?;
        Ok(String::from_utf8(slice).unwrap())
    }

    type DeserType<'a> = &'a str;

    unsafe fn _deser_eps_inner<'a>(
        backend: &mut SliceWithPos<'a>,
    ) -> deser::Result<Self::DeserType<'a>> {
        let slice = unsafe { deser_eps_slice_zero(backend) }?;
        // SAFETY: Actually this is unsafe if the data we read is not valid UTF-8
        Ok({
            unsafe {
                #[allow(clippy::transmute_bytes_to_str)]
                core::mem::transmute::<&'_ [u8], &'_ str>(slice)
            }
        })
    }
}

unsafe impl CopyType for Box<str> {
    type Copy = Deep;
}

impl TypeHash for Box<str> {
    fn type_hash(hasher: &mut impl core::hash::Hasher) {
        "Box<str>".hash(hasher);
    }
}

impl AlignHash for Box<str> {
    fn align_hash(_hasher: &mut impl core::hash::Hasher, _offset_of: &mut usize) {}
}

impl SerInner for Box<str> {
    type SerType = Self;
    // Box<[$ty]> can, but Vec<Box<[$ty]>> cannot!
    const IS_ZERO_COPY: bool = false;
    const ZERO_COPY_MISMATCH: bool = false;

    unsafe fn _ser_inner(&self, backend: &mut impl WriteWithNames) -> ser::Result<()> {
        ser_slice_zero(backend, self.as_bytes())
    }
}

impl DeserInner for Box<str> {
    #[inline(always)]
    unsafe fn _deser_full_inner(backend: &mut impl ReadWithPos) -> deser::Result<Self> {
        Ok(unsafe { String::_deser_full_inner(backend) }?.into_boxed_str())
    }

    type DeserType<'a> = &'a str;

    #[inline(always)]
    unsafe fn _deser_eps_inner<'a>(
        backend: &mut SliceWithPos<'a>,
    ) -> deser::Result<Self::DeserType<'a>> {
        unsafe { String::_deser_eps_inner(backend) }
    }
}

// For use with PhantomData
impl TypeHash for str {
    fn type_hash(hasher: &mut impl core::hash::Hasher) {
        "str".hash(hasher);
    }
}

impl SerInner for &str {
    type SerType = Box<str>;
    const IS_ZERO_COPY: bool = false;
    const ZERO_COPY_MISMATCH: bool = false;

    unsafe fn _ser_inner(&self, backend: &mut impl WriteWithNames) -> ser::Result<()> {
        ser_slice_zero(backend, self.as_bytes())
    }
}

1	/*
2	* SPDX-FileCopyrightText: 2023 Inria
3	* SPDX-FileCopyrightText: 2023 Sebastiano Vigna
4	*
5	* SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
6	*/
7
8	//! Implementations for strings.
9	//!
10	//! All string types have the same serialization type, `Box<str>`, and the same
11	//! deserialization type, `&str`. Thus, you can serialize a `String` and fully
12	//! deserialize it as `Box<str>`.
13	//!
14	//! Similarly to the case of [slices](crate::impls::slice), there is
15	//! a convenience [`SerInner`] implementation for `&str` that
16	//! serializes it as `Box<str>`.
17	//!
18	//! We provide type hashes for `String` and `str` so that they can be used
19	//! in [`PhantomData`](core::marker::PhantomData).
20
21	use crate::prelude::*;
22	use core::hash::Hash;
23	use deser::*;
24	use ser::*;
25
26	#[cfg(not(feature = "std"))]
27	use alloc::boxed::Box;
28
29	unsafe impl CopyType for String {
30	type Copy = Deep;
31	}
32
33	#[cfg(not(feature = "std"))]
34	use alloc::string::String;
35
36	// For use with PhantomData
37	impl TypeHash for String {
38	fn type_hash(hasher: &mut impl core::hash::Hasher) {	1✔
39	"String".hash(hasher);	3✔
40	}
41	}
42
43	impl SerInner for String {
44	type SerType = Box<str>;
45	const IS_ZERO_COPY: bool = false;
46	const ZERO_COPY_MISMATCH: bool = false;
47
48	unsafe fn _ser_inner(&self, backend: &mut impl WriteWithNames) -> ser::Result<()> {	340✔
49	ser_slice_zero(backend, self.as_bytes())	1,020✔
50	}
51	}
52
53	impl DeserInner for String {
54	unsafe fn _deser_full_inner(backend: &mut impl ReadWithPos) -> deser::Result<Self> {	673✔
55	let slice = unsafe { deser_full_vec_zero(backend) }?;	2,019✔
56	Ok(String::from_utf8(slice).unwrap())	×
57	}
58
59	type DeserType<'a> = &'a str;
60
61	unsafe fn _deser_eps_inner<'a>(	32✔
62	backend: &mut SliceWithPos<'a>,
63	) -> deser::Result<Self::DeserType<'a>> {
64	let slice = unsafe { deser_eps_slice_zero(backend) }?;	96✔
65	// SAFETY: Actually this is unsafe if the data we read is not valid UTF-8
66	Ok({	×
67	unsafe {	×
68	#[allow(clippy::transmute_bytes_to_str)]	×
69	core::mem::transmute::<&'_ [u8], &'_ str>(slice)	×
70	}
71	})
72	}
73	}
74
75	unsafe impl CopyType for Box<str> {
76	type Copy = Deep;
77	}
78
79	impl TypeHash for Box<str> {
80	fn type_hash(hasher: &mut impl core::hash::Hasher) {	40✔
81	"Box<str>".hash(hasher);	120✔
82	}
83	}
84
85	impl AlignHash for Box<str> {
86	fn align_hash(_hasher: &mut impl core::hash::Hasher, _offset_of: &mut usize) {}	86✔
87	}
88
89	impl SerInner for Box<str> {
90	type SerType = Self;
91	// Box<[$ty]> can, but Vec<Box<[$ty]>> cannot!
92	const IS_ZERO_COPY: bool = false;
93	const ZERO_COPY_MISMATCH: bool = false;
94
95	unsafe fn _ser_inner(&self, backend: &mut impl WriteWithNames) -> ser::Result<()> {	2✔
96	ser_slice_zero(backend, self.as_bytes())	6✔
97	}
98	}
99
100	impl DeserInner for Box<str> {
101	#[inline(always)]
102	unsafe fn _deser_full_inner(backend: &mut impl ReadWithPos) -> deser::Result<Self> {	4✔
103	Ok(unsafe { String::_deser_full_inner(backend) }?.into_boxed_str())	12✔
104	}
105
106	type DeserType<'a> = &'a str;
107
108	#[inline(always)]
109	unsafe fn _deser_eps_inner<'a>(	6✔
110	backend: &mut SliceWithPos<'a>,
111	) -> deser::Result<Self::DeserType<'a>> {
112	unsafe { String::_deser_eps_inner(backend) }	12✔
113	}
114	}
115
116	// For use with PhantomData
117	impl TypeHash for str {
118	fn type_hash(hasher: &mut impl core::hash::Hasher) {	1✔
119	"str".hash(hasher);	3✔
120	}
121	}
122
123	impl SerInner for &str {
124	type SerType = Box<str>;
125	const IS_ZERO_COPY: bool = false;
126	const ZERO_COPY_MISMATCH: bool = false;
127
128	unsafe fn _ser_inner(&self, backend: &mut impl WriteWithNames) -> ser::Result<()> {	2✔
129	ser_slice_zero(backend, self.as_bytes())	6✔
130	}
131	}

vigna / epserde-rs / 18041364878

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