vortex_flatbuffers/
lib.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
//! A contiguously serialized Vortex array.
//!
//! See [message] and [footer] for the flatbuffer specifications.
//!
//! See the `vortex-file` crate for non-contiguous serialization.

#[cfg(feature = "array")]
#[allow(clippy::all)]
#[allow(clippy::derive_partial_eq_without_eq)]
#[allow(clippy::many_single_char_names)]
#[allow(clippy::unwrap_used)]
#[allow(dead_code)]
#[allow(non_snake_case)]
#[allow(non_camel_case_types)]
#[allow(unsafe_op_in_unsafe_fn)]
#[allow(unused_imports)]
#[allow(unused_lifetimes)]
#[allow(unused_qualifications)]
#[rustfmt::skip]
#[path = "./generated/array.rs"]
/// A serialized array without its buffer (i.e. data).
///
/// `array.fbs`:
/// ```flatbuffers
#[doc = include_str!("../flatbuffers/vortex-array/array.fbs")]
/// ```
pub mod array;

#[cfg(feature = "dtype")]
#[allow(clippy::all)]
#[allow(clippy::derive_partial_eq_without_eq)]
#[allow(clippy::many_single_char_names)]
#[allow(clippy::unwrap_used)]
#[allow(dead_code)]
#[allow(non_snake_case)]
#[allow(non_camel_case_types)]
#[allow(unsafe_op_in_unsafe_fn)]
#[allow(unused_imports)]
#[allow(unused_lifetimes)]
#[allow(unused_qualifications)]
#[rustfmt::skip]
#[path = "./generated/dtype.rs"]
/// A serialized data type.
///
/// `dtype.fbs`:
/// ```flatbuffers
#[doc = include_str!("../flatbuffers/vortex-dtype/dtype.fbs")]
/// ```
pub mod dtype;

#[cfg(feature = "scalar")]
#[allow(clippy::all)]
#[allow(clippy::derive_partial_eq_without_eq)]
#[allow(clippy::many_single_char_names)]
#[allow(clippy::unwrap_used)]
#[allow(dead_code)]
#[allow(non_snake_case)]
#[allow(non_camel_case_types)]
#[allow(unsafe_op_in_unsafe_fn)]
#[allow(unused_imports)]
#[allow(unused_lifetimes)]
#[allow(unused_qualifications)]
#[rustfmt::skip]
#[path = "./generated/scalar.rs"]
/// A serialized scalar.
///
/// `scalar.fbs`:
/// ```flatbuffers
#[doc = include_str!("../flatbuffers/vortex-scalar/scalar.fbs")]
/// ```
pub mod scalar;

#[cfg(feature = "file")]
#[allow(clippy::all)]
#[allow(clippy::derive_partial_eq_without_eq)]
#[allow(clippy::many_single_char_names)]
#[allow(clippy::unwrap_used)]
#[allow(dead_code)]
#[allow(non_snake_case)]
#[allow(non_camel_case_types)]
#[allow(unsafe_op_in_unsafe_fn)]
#[allow(unused_imports)]
#[allow(unused_lifetimes)]
#[allow(unused_qualifications)]
#[rustfmt::skip]
#[path = "./generated/footer.rs"]
/// A file format footer containing a serialized `vortex-file` Layout.
///
/// `footer.fbs`:
/// ```flatbuffers
#[doc = include_str!("../flatbuffers/vortex-file/footer.fbs")]
/// ```
pub mod footer;

#[cfg(feature = "layout")]
#[allow(clippy::all)]
#[allow(clippy::derive_partial_eq_without_eq)]
#[allow(clippy::many_single_char_names)]
#[allow(clippy::unwrap_used)]
#[allow(dead_code)]
#[allow(non_snake_case)]
#[allow(non_camel_case_types)]
#[allow(unsafe_op_in_unsafe_fn)]
#[allow(unused_imports)]
#[allow(unused_lifetimes)]
#[allow(unused_qualifications)]
#[rustfmt::skip]
#[path = "./generated/layout.rs"]
/// A serialized sequence of arrays, each with its buffers.
///
/// `layout.fbs`:
/// ```flatbuffers
#[doc = include_str!("../flatbuffers/vortex-layout/layout.fbs")]
/// ```
pub mod layout;

#[cfg(feature = "ipc")]
#[allow(clippy::all)]
#[allow(clippy::derive_partial_eq_without_eq)]
#[allow(clippy::many_single_char_names)]
#[allow(clippy::unwrap_used)]
#[allow(dead_code)]
#[allow(non_snake_case)]
#[allow(non_camel_case_types)]
#[allow(unsafe_op_in_unsafe_fn)]
#[allow(unused_imports)]
#[allow(unused_lifetimes)]
#[allow(unused_qualifications)]
#[rustfmt::skip]
#[path = "./generated/message.rs"]
/// A serialized sequence of arrays, each with its buffers.
///
/// `message.fbs`:
/// ```flatbuffers
#[doc = include_str!("../flatbuffers/vortex-serde/message.fbs")]
/// ```
pub mod message;

use flatbuffers::{root, FlatBufferBuilder, Follow, InvalidFlatbuffer, Verifiable, WIPOffset};
use vortex_buffer::{ByteBuffer, ConstByteBuffer};

/// We define a const-aligned byte buffer for flatbuffers with 8-byte alignment.
///
/// This is based on the assumption that the maximum primitive type is 8 bytes.
/// See: <https://groups.google.com/g/flatbuffers/c/PSgQeWeTx_g>
pub type FlatBuffer = ConstByteBuffer<8>;

pub trait FlatBufferRoot {}

pub trait ReadFlatBuffer: Sized {
    type Source<'a>: Verifiable + Follow<'a>;
    type Error: From<InvalidFlatbuffer>;

    fn read_flatbuffer<'buf>(
        fb: &<Self::Source<'buf> as Follow<'buf>>::Inner,
    ) -> Result<Self, Self::Error>;

    fn read_flatbuffer_bytes<'buf>(bytes: &'buf [u8]) -> Result<Self, Self::Error>
    where
        <Self as ReadFlatBuffer>::Source<'buf>: 'buf,
    {
        let fb = root::<Self::Source<'buf>>(bytes)?;
        Self::read_flatbuffer(&fb)
    }
}

pub trait WriteFlatBuffer {
    type Target<'a>;

    fn write_flatbuffer<'fb>(
        &self,
        fbb: &mut FlatBufferBuilder<'fb>,
    ) -> WIPOffset<Self::Target<'fb>>;
}

pub trait WriteFlatBufferExt: WriteFlatBuffer + FlatBufferRoot {
    /// Write the flatbuffer into a [`FlatBuffer`].
    fn write_flatbuffer_bytes(&self) -> FlatBuffer;
}

impl<F: WriteFlatBuffer + FlatBufferRoot> WriteFlatBufferExt for F {
    fn write_flatbuffer_bytes(&self) -> FlatBuffer {
        let mut fbb = FlatBufferBuilder::new();
        let root_offset = self.write_flatbuffer(&mut fbb);
        fbb.finish_minimal(root_offset);
        let (vec, start) = fbb.collapse();
        let end = vec.len();
        FlatBuffer::align_from(ByteBuffer::from(vec).slice(start..end))
    }
}