16935267080

Committed 13 Aug 2025 11:00AM UTC coverage: 24.312% (-63.3%) from 87.658%

Build # 16935267080

Build Type

Pull #4226

github

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web-flow

Commit Message

Merge 81b48c7fb into baa6ea202

Pull Request Pull Request #4226: Support converting TimestampTZ to and from duckdb

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62.5

/vortex-buffer/src/alignment.rs

// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: Copyright the Vortex contributors

use std::fmt::Display;
use std::ops::Deref;

use vortex_error::VortexExpect;

/// The alignment of a buffer.
///
/// This type is a wrapper around `usize` that ensures the alignment is a power of 2 and fits into
/// a `u16`.
#[derive(Clone, Debug, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Alignment(usize);

impl Alignment {
    /// Create a new alignment.
    ///
    /// ## Panics
    ///
    /// Panics if `align` is not a power of 2, or is greater than `u16::MAX`.
    #[inline]
    pub const fn new(align: usize) -> Self {
        assert!(align > 0, "Alignment must be greater than 0");
        assert!(align <= u16::MAX as usize, "Alignment must fit into u16");
        assert!(align.is_power_of_two(), "Alignment must be a power of 2");
        Self(align)
    }

    /// Create a new 1-byte alignment.
    pub const fn none() -> Self {
        Self::new(1)
    }

    /// Create an alignment from the alignment of a type `T`.
    ///
    /// ## Example
    ///
    /// ```
    /// use vortex_buffer::Alignment;
    ///
    /// assert_eq!(Alignment::new(4), Alignment::of::<i32>());
    /// assert_eq!(Alignment::new(8), Alignment::of::<i64>());
    /// assert_eq!(Alignment::new(16), Alignment::of::<u128>());
    /// ```
    #[inline]
    pub const fn of<T>() -> Self {
        Self::new(align_of::<T>())
    }

    /// Check if this alignment is a "larger" than another alignment.
    ///
    /// ## Example
    ///
    /// ```
    /// use vortex_buffer::Alignment;
    ///
    /// let a = Alignment::new(4);
    /// let b = Alignment::new(2);
    /// assert!(a.is_aligned_to(b));
    /// assert!(!b.is_aligned_to(a));
    /// ```
    #[inline]
    pub fn is_aligned_to(&self, other: Alignment) -> bool {
        // Since we know alignments are powers of 2, we can compare them by checking if the number
        // of trailing zeros in the binary representation of the alignment is greater or equal.
        self.0.trailing_zeros() >= other.0.trailing_zeros()
    }

    /// Returns the log2 of the alignment.
    pub fn exponent(&self) -> u8 {
        u8::try_from(self.0.trailing_zeros())
            .vortex_expect("alignment fits into u16, so exponent fits in u7")
    }

    /// Create from the log2 exponent of the alignment.
    ///
    /// ## Panics
    ///
    /// Panics if `alignment` is not a power of 2, or is greater than `u16::MAX`.
    #[inline]
    pub const fn from_exponent(exponent: u8) -> Self {
        Self::new(1 << exponent)
    }
}

impl Display for Alignment {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
}

impl Deref for Alignment {
    type Target = usize;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl From<usize> for Alignment {
    fn from(value: usize) -> Self {
        Self::new(value)
    }
}

impl From<u16> for Alignment {
    fn from(value: u16) -> Self {
        Self::new(usize::from(value))
    }
}

impl From<Alignment> for usize {
    fn from(value: Alignment) -> Self {
        value.0
    }
}

impl From<Alignment> for u16 {
    fn from(value: Alignment) -> Self {
        u16::try_from(value.0).vortex_expect("Alignment must fit into u16")
    }
}

#[cfg(test)]
mod test {
    use super::*;

    #[test]
    #[should_panic]
    fn alignment_zero() {
        Alignment::new(0);
    }

    #[test]
    #[should_panic]
    fn alignment_overflow() {
        Alignment::new(u16::MAX as usize + 1);
    }

    #[test]
    #[should_panic]
    fn alignment_not_power_of_two() {
        Alignment::new(3);
    }

    #[test]
    fn alignment_exponent() {
        let alignment = Alignment::new(1024);
        assert_eq!(alignment.exponent(), 10);
        assert_eq!(Alignment::from_exponent(10), alignment);
    }

    #[test]
    fn is_aligned_to() {
        assert!(Alignment::new(1).is_aligned_to(Alignment::new(1)));
        assert!(Alignment::new(2).is_aligned_to(Alignment::new(1)));
        assert!(Alignment::new(4).is_aligned_to(Alignment::new(1)));
        assert!(!Alignment::new(1).is_aligned_to(Alignment::new(2)));
    }
}

1	// SPDX-License-Identifier: Apache-2.0
2	// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4	use std::fmt::Display;
5	use std::ops::Deref;
6
7	use vortex_error::VortexExpect;
8
9	/// The alignment of a buffer.
10	///
11	/// This type is a wrapper around `usize` that ensures the alignment is a power of 2 and fits into
12	/// a `u16`.
13	#[derive(Clone, Debug, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
14	pub struct Alignment(usize);
15
16	impl Alignment {
17	/// Create a new alignment.
18	///
19	/// ## Panics
20	///
21	/// Panics if `align` is not a power of 2, or is greater than `u16::MAX`.
22	#[inline]
23	pub const fn new(align: usize) -> Self {	6,788✔
24	assert!(align > 0, "Alignment must be greater than 0");	6,788✔
25	assert!(align <= u16::MAX as usize, "Alignment must fit into u16");	6,788✔
26	assert!(align.is_power_of_two(), "Alignment must be a power of 2");	6,788✔
27	Self(align)	6,788✔
28	}	6,788✔
29
30	/// Create a new 1-byte alignment.
31	pub const fn none() -> Self {	62✔
32	Self::new(1)	62✔
33	}	62✔
34
35	/// Create an alignment from the alignment of a type `T`.
36	///
37	/// ## Example
38	///
39	/// ```
40	/// use vortex_buffer::Alignment;
41	///
42	/// assert_eq!(Alignment::new(4), Alignment::of::<i32>());
43	/// assert_eq!(Alignment::new(8), Alignment::of::<i64>());
44	/// assert_eq!(Alignment::new(16), Alignment::of::<u128>());
45	/// ```
46	#[inline]
47	pub const fn of<T>() -> Self {	6,654✔
48	Self::new(align_of::<T>())	6,654✔
49	}	6,654✔
50
51	/// Check if this alignment is a "larger" than another alignment.
52	///
53	/// ## Example
54	///
55	/// ```
56	/// use vortex_buffer::Alignment;
57	///
58	/// let a = Alignment::new(4);
59	/// let b = Alignment::new(2);
60	/// assert!(a.is_aligned_to(b));
61	/// assert!(!b.is_aligned_to(a));
62	/// ```
63	#[inline]
64	pub fn is_aligned_to(&self, other: Alignment) -> bool {	3,460✔
65	// Since we know alignments are powers of 2, we can compare them by checking if the number
66	// of trailing zeros in the binary representation of the alignment is greater or equal.
67	self.0.trailing_zeros() >= other.0.trailing_zeros()	3,460✔
68	}	3,460✔
69
70	/// Returns the log2 of the alignment.
71	pub fn exponent(&self) -> u8 {	48✔
72	u8::try_from(self.0.trailing_zeros())	48✔
73	.vortex_expect("alignment fits into u16, so exponent fits in u7")	48✔
74	}	48✔
75
76	/// Create from the log2 exponent of the alignment.
77	///
78	/// ## Panics
79	///
80	/// Panics if `alignment` is not a power of 2, or is greater than `u16::MAX`.
81	#[inline]
82	pub const fn from_exponent(exponent: u8) -> Self {	22✔
83	Self::new(1 << exponent)	22✔
84	}	22✔
85	}
86
87	impl Display for Alignment {
UNCOV 88	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {	×
UNCOV 89	write!(f, "{}", self.0)	×
UNCOV 90	}	×
91	}
92
93	impl Deref for Alignment {
94	type Target = usize;
95
96	fn deref(&self) -> &Self::Target {	6,836✔
97	&self.0	6,836✔
98	}	6,836✔
99	}
100
101	impl From<usize> for Alignment {
UNCOV 102	fn from(value: usize) -> Self {	×
UNCOV 103	Self::new(value)	×
UNCOV 104	}	×
105	}
106
107	impl From<u16> for Alignment {
108	fn from(value: u16) -> Self {	×
109	Self::new(usize::from(value))	×
110	}	×
111	}
112
113	impl From<Alignment> for usize {
114	fn from(value: Alignment) -> Self {	×
115	value.0	×
116	}	×
117	}
118
119	impl From<Alignment> for u16 {
120	fn from(value: Alignment) -> Self {	×
121	u16::try_from(value.0).vortex_expect("Alignment must fit into u16")	×
122	}	×
123	}
124
125	#[cfg(test)]
126	mod test {
127	use super::*;
128
129	#[test]
130	#[should_panic]
131	fn alignment_zero() {
132	Alignment::new(0);
133	}
134
135	#[test]
136	#[should_panic]
137	fn alignment_overflow() {
138	Alignment::new(u16::MAX as usize + 1);
139	}
140
141	#[test]
142	#[should_panic]
143	fn alignment_not_power_of_two() {
144	Alignment::new(3);
145	}
146
147	#[test]
148	fn alignment_exponent() {
149	let alignment = Alignment::new(1024);
150	assert_eq!(alignment.exponent(), 10);
151	assert_eq!(Alignment::from_exponent(10), alignment);
152	}
153
154	#[test]
155	fn is_aligned_to() {
156	assert!(Alignment::new(1).is_aligned_to(Alignment::new(1)));
157	assert!(Alignment::new(2).is_aligned_to(Alignment::new(1)));
158	assert!(Alignment::new(4).is_aligned_to(Alignment::new(1)));
159	assert!(!Alignment::new(1).is_aligned_to(Alignment::new(2)));
160	}
161	}

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