/rust/registry/src/index.crates.io-6f17d22bba15001f/der-0.7.9/src/bytes_owned.rs

Source (jump to first uncovered line)
//! Common handling for types backed by byte allocation with enforcement of a
//! library-level length limitation i.e. `Length::max()`.

use crate::{
    referenced::OwnedToRef, BytesRef, DecodeValue, DerOrd, EncodeValue, Error, Header, Length,
    Reader, Result, StrRef, Writer,
};
use alloc::{boxed::Box, vec::Vec};
use core::cmp::Ordering;

/// Byte slice newtype which respects the `Length::max()` limit.
#[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
pub(crate) struct BytesOwned {
    /// Precomputed `Length` (avoids possible panicking conversions)
    length: Length,

    /// Inner value
    inner: Box<[u8]>,
}

impl BytesOwned {
    /// Create a new [`BytesOwned`], ensuring that the provided `slice` value
    /// is shorter than `Length::max()`.
    pub fn new(data: impl Into<Box<[u8]>>) -> Result<Self> {
        let inner: Box<[u8]> = data.into();

        Ok(Self {
            length: Length::try_from(inner.len())?,
            inner,
        })
    }

    /// Borrow the inner byte slice
    pub fn as_slice(&self) -> &[u8] {
        &self.inner
    }

    /// Get the [`Length`] of this [`BytesRef`]
    pub fn len(&self) -> Length {
        self.length
    }

    /// Is this [`BytesOwned`] empty?
    pub fn is_empty(&self) -> bool {
        self.len() == Length::ZERO
    }
}

impl AsRef<[u8]> for BytesOwned {
    fn as_ref(&self) -> &[u8] {
        self.as_slice()
    }
}

impl<'a> DecodeValue<'a> for BytesOwned {
    fn decode_value<R: Reader<'a>>(reader: &mut R, header: Header) -> Result<Self> {
        reader.read_vec(header.length).and_then(Self::new)
    }
}

impl EncodeValue for BytesOwned {
    fn value_len(&self) -> Result<Length> {
        Ok(self.length)
    }

    fn encode_value(&self, writer: &mut impl Writer) -> Result<()> {
        writer.write(self.as_ref())
    }
}

impl Default for BytesOwned {
    fn default() -> Self {
        Self {
            length: Length::ZERO,
            inner: Box::new([]),
        }
    }
}

impl DerOrd for BytesOwned {
    fn der_cmp(&self, other: &Self) -> Result<Ordering> {
        Ok(self.as_slice().cmp(other.as_slice()))
    }
}

impl From<BytesOwned> for Box<[u8]> {
    fn from(bytes: BytesOwned) -> Box<[u8]> {
        bytes.inner
    }
}

impl From<StrRef<'_>> for BytesOwned {
    fn from(s: StrRef<'_>) -> BytesOwned {
        let bytes = s.as_bytes();
        debug_assert_eq!(bytes.len(), usize::try_from(s.length).expect("overflow"));

        BytesOwned {
            inner: Box::from(bytes),
            length: s.length,
        }
    }
}

impl OwnedToRef for BytesOwned {
    type Borrowed<'a> = BytesRef<'a>;
    fn owned_to_ref(&self) -> Self::Borrowed<'_> {
        BytesRef {
            length: self.length,
            inner: self.inner.as_ref(),
        }
    }
}

impl From<BytesRef<'_>> for BytesOwned {
    fn from(s: BytesRef<'_>) -> BytesOwned {
        BytesOwned {
            length: s.length,
            inner: Box::from(s.inner),
        }
    }
}

impl TryFrom<&[u8]> for BytesOwned {
    type Error = Error;

    fn try_from(bytes: &[u8]) -> Result<Self> {
        Self::new(bytes)
    }
}

impl TryFrom<Box<[u8]>> for BytesOwned {
    type Error = Error;

    fn try_from(bytes: Box<[u8]>) -> Result<Self> {
        Self::new(bytes)
    }
}

impl TryFrom<Vec<u8>> for BytesOwned {
    type Error = Error;

    fn try_from(bytes: Vec<u8>) -> Result<Self> {
        Self::new(bytes)
    }
}

// Implement by hand because the derive would create invalid values.
// Make sure the length and the inner.len matches.
#[cfg(feature = "arbitrary")]
impl<'a> arbitrary::Arbitrary<'a> for BytesOwned {
    fn arbitrary(u: &mut arbitrary::Unstructured<'a>) -> arbitrary::Result<Self> {
        let length = u.arbitrary()?;
        Ok(Self {
            length,
            inner: Box::from(u.bytes(u32::from(length) as usize)?),
        })
    }

    fn size_hint(depth: usize) -> (usize, Option<usize>) {
        arbitrary::size_hint::and(Length::size_hint(depth), (0, None))
    }
}

Line	Count	Source (jump to first uncovered line)
1		//! Common handling for types backed by byte allocation with enforcement of a
2		//! library-level length limitation i.e. `Length::max()`.
3
4		use crate::{
5		referenced::OwnedToRef, BytesRef, DecodeValue, DerOrd, EncodeValue, Error, Header, Length,
6		Reader, Result, StrRef, Writer,
7		};
8		use alloc::{boxed::Box, vec::Vec};
9		use core::cmp::Ordering;
10
11		/// Byte slice newtype which respects the `Length::max()` limit.
12		#[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
13		pub(crate) struct BytesOwned {
14		/// Precomputed `Length` (avoids possible panicking conversions)
15		length: Length,
16
17		/// Inner value
18		inner: Box<[u8]>,
19		}
20
21		impl BytesOwned {
22		/// Create a new [`BytesOwned`], ensuring that the provided `slice` value
23		/// is shorter than `Length::max()`.
24	0	pub fn new(data: impl Into<Box<[u8]>>) -> Result<Self> {
25	0	let inner: Box<[u8]> = data.into();
26	0
27	0	Ok(Self {
28	0	length: Length::try_from(inner.len())?,
29	0	inner,
30		})
31	0	} Unexecuted instantiation: <der::bytes_owned::BytesOwned>::new::<alloc::vec::Vec<u8>> Unexecuted instantiation: <der::bytes_owned::BytesOwned>::new::<alloc::boxed::Box<[u8]>> Unexecuted instantiation: <der::bytes_owned::BytesOwned>::new::<&[u8]>
32
33		/// Borrow the inner byte slice
34	0	pub fn as_slice(&self) -> &[u8] {
35	0	&self.inner
36	0	}
37
38		/// Get the [`Length`] of this [`BytesRef`]
39	0	pub fn len(&self) -> Length {
40	0	self.length
41	0	}
42
43		/// Is this [`BytesOwned`] empty?
44	0	pub fn is_empty(&self) -> bool {
45	0	self.len() == Length::ZERO
46	0	}
47		}
48
49		impl AsRef<[u8]> for BytesOwned {
50	0	fn as_ref(&self) -> &[u8] {
51	0	self.as_slice()
52	0	}
53		}
54
55		impl<'a> DecodeValue<'a> for BytesOwned {
56	0	fn decode_value<R: Reader<'a>>(reader: &mut R, header: Header) -> Result<Self> {
57	0	reader.read_vec(header.length).and_then(Self::new)
58	0	}
59		}
60
61		impl EncodeValue for BytesOwned {
62	0	fn value_len(&self) -> Result<Length> {
63	0	Ok(self.length)
64	0	}
65
66	0	fn encode_value(&self, writer: &mut impl Writer) -> Result<()> {
67	0	writer.write(self.as_ref())
68	0	}
69		}
70
71		impl Default for BytesOwned {
72	0	fn default() -> Self {
73	0	Self {
74	0	length: Length::ZERO,
75	0	inner: Box::new([]),
76	0	}
77	0	}
78		}
79
80		impl DerOrd for BytesOwned {
81	0	fn der_cmp(&self, other: &Self) -> Result<Ordering> {
82	0	Ok(self.as_slice().cmp(other.as_slice()))
83	0	}
84		}
85
86		impl From<BytesOwned> for Box<[u8]> {
87	0	fn from(bytes: BytesOwned) -> Box<[u8]> {
88	0	bytes.inner
89	0	}
90		}
91
92		impl From<StrRef<'_>> for BytesOwned {
93	0	fn from(s: StrRef<'_>) -> BytesOwned {
94	0	let bytes = s.as_bytes();
95	0	debug_assert_eq!(bytes.len(), usize::try_from(s.length).expect("overflow"));
96
97	0	BytesOwned {
98	0	inner: Box::from(bytes),
99	0	length: s.length,
100	0	}
101	0	}
102		}
103
104		impl OwnedToRef for BytesOwned {
105		type Borrowed<'a> = BytesRef<'a>;
106	0	fn owned_to_ref(&self) -> Self::Borrowed<'_> {
107	0	BytesRef {
108	0	length: self.length,
109	0	inner: self.inner.as_ref(),
110	0	}
111	0	}
112		}
113
114		impl From<BytesRef<'_>> for BytesOwned {
115	0	fn from(s: BytesRef<'_>) -> BytesOwned {
116	0	BytesOwned {
117	0	length: s.length,
118	0	inner: Box::from(s.inner),
119	0	}
120	0	}
121		}
122
123		impl TryFrom<&[u8]> for BytesOwned {
124		type Error = Error;
125
126	0	fn try_from(bytes: &[u8]) -> Result<Self> {
127	0	Self::new(bytes)
128	0	}
129		}
130
131		impl TryFrom<Box<[u8]>> for BytesOwned {
132		type Error = Error;
133
134	0	fn try_from(bytes: Box<[u8]>) -> Result<Self> {
135	0	Self::new(bytes)
136	0	}
137		}
138
139		impl TryFrom<Vec<u8>> for BytesOwned {
140		type Error = Error;
141
142	0	fn try_from(bytes: Vec<u8>) -> Result<Self> {
143	0	Self::new(bytes)
144	0	}
145		}
146
147		// Implement by hand because the derive would create invalid values.
148		// Make sure the length and the inner.len matches.
149		#[cfg(feature = "arbitrary")]
150		impl<'a> arbitrary::Arbitrary<'a> for BytesOwned {
151		fn arbitrary(u: &mut arbitrary::Unstructured<'a>) -> arbitrary::Result<Self> {
152		let length = u.arbitrary()?;
153		Ok(Self {
154		length,
155		inner: Box::from(u.bytes(u32::from(length) as usize)?),
156		})
157		}
158
159		fn size_hint(depth: usize) -> (usize, Option<usize>) {
160		arbitrary::size_hint::and(Length::size_hint(depth), (0, None))
161		}
162		}

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Created: 2024-11-30 06:06