arrow2 0.7.1

Unofficial implementation of Apache Arrow spec in safe Rust
Documentation 
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

use std::collections::VecDeque;
use std::io::{Read, Seek};

use arrow_format::ipc;

use crate::array::FixedSizeBinaryArray;
use crate::datatypes::DataType;
use crate::error::Result;

use super::super::deserialize::Node;
use super::super::read_basic::*;

pub fn read_fixed_size_binary<R: Read + Seek>(
    field_nodes: &mut VecDeque<Node>,
    data_type: DataType,
    buffers: &mut VecDeque<&ipc::Schema::Buffer>,
    reader: &mut R,
    block_offset: u64,
    is_little_endian: bool,
    compression: Option<ipc::Message::BodyCompression>,
) -> Result<FixedSizeBinaryArray> {
    let field_node = field_nodes.pop_front().unwrap().0;

    let validity = read_validity(
        buffers,
        field_node,
        reader,
        block_offset,
        is_little_endian,
        compression,
    )?;

    let length =
        field_node.length() as usize * (*FixedSizeBinaryArray::get_size(&data_type) as usize);
    let values = read_buffer(
        buffers,
        length,
        reader,
        block_offset,
        is_little_endian,
        compression,
    )?;

    Ok(FixedSizeBinaryArray::from_data(data_type, values, validity))
}

pub fn skip_fixed_size_binary(
    field_nodes: &mut VecDeque<Node>,
    buffers: &mut VecDeque<&ipc::Schema::Buffer>,
) {
    let _ = field_nodes.pop_front().unwrap();

    let _ = buffers.pop_front().unwrap();
    let _ = buffers.pop_front().unwrap();
}