ninterp 0.9.0

Numerical interpolation for N-dimensional rectilinear grids
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
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

use super::*;

pub(crate) use ndarray::{DataOwned, IntoDimension};
pub(crate) use serde::{Deserialize, Serialize};
pub(crate) use serde_unit_struct::{Deserialize_unit_struct, Serialize_unit_struct};

use serde::de::{Deserializer, Error};
use serde::ser::{SerializeSeq, Serializer};
use serde_ndim::de::MakeNDim;

#[derive(Serialize)]
struct ArrayWrapper<'a, D>(
    #[serde(serialize_with = "serde_ndim::serialize")] &'a ArrayBase<D, Ix1>,
)
where
    D: Data,
    D::Elem: Serialize;

#[derive(Deserialize)]
#[serde(untagged)]
#[serde(bound = "D::Elem: Deserialize<'de>")]
enum GridType<D: DataOwned> {
    VecVec(Vec<Vec<D::Elem>>),
    VecArray(Vec<ArrayBase<D, Ix1>>),
}

pub(crate) mod serde_arr_array {
    use super::*;

    pub fn serialize<D, const N: usize, Ser>(
        grid: &[ArrayBase<D, Ix1>; N],
        serializer: Ser,
    ) -> Result<Ser::Ok, Ser::Error>
    where
        D: Data,
        D::Elem: Serialize,
        Ser: Serializer,
    {
        let mut seq = serializer.serialize_seq(Some(N))?;
        for arr in grid {
            seq.serialize_element(&ArrayWrapper(arr))?;
        }
        seq.end()
    }

    pub fn deserialize<'de, D, const N: usize, De>(
        deserializer: De,
    ) -> Result<[ArrayBase<D, Ix1>; N], De::Error>
    where
        D: DataOwned,
        D::Elem: Deserialize<'de> + Debug,
        De: Deserializer<'de>,
    {
        match GridType::deserialize(deserializer)? {
            GridType::VecVec(vecs) => vecs.into_iter().map(Into::into).collect(),
            GridType::VecArray(arrays) => arrays,
        }
        .try_into()
        .map_err(|e: Vec<_>| {
            De::Error::custom(format_args!(
                "expected {N} array(s), found {}: {e:?}",
                e.len()
            ))
        })
    }
}

pub(crate) mod serde_vec_array {
    use super::*;

    pub fn serialize<D, Ser>(
        grid: &[ArrayBase<D, Ix1>],
        serializer: Ser,
    ) -> Result<Ser::Ok, Ser::Error>
    where
        D: Data,
        D::Elem: Serialize,
        Ser: Serializer,
    {
        let mut seq = serializer.serialize_seq(Some(grid.len()))?;
        for arr in grid {
            seq.serialize_element(&ArrayWrapper(arr))?;
        }
        seq.end()
    }

    pub fn deserialize<'de, D, De>(deserializer: De) -> Result<Vec<ArrayBase<D, Ix1>>, De::Error>
    where
        D: DataOwned,
        D::Elem: Deserialize<'de>,
        De: Deserializer<'de>,
    {
        Ok(match GridType::deserialize(deserializer)? {
            GridType::VecVec(vecs) => vecs.into_iter().map(Into::into).collect(),
            GridType::VecArray(arrays) => arrays,
        })
    }
}

#[derive(Deserialize)]
#[serde(untagged)]
#[serde(bound = "
    D::Elem: Deserialize<'de>,
    ArrayBase<D, Dim>: Deserialize<'de>,
")]
enum ValuesType<D, Dim>
where
    D: DataOwned,
    Dim: Dimension,
    ArrayBase<D, Dim>: MakeNDim<Item = D::Elem>,
{
    #[serde(deserialize_with = "serde_ndim::deserialize")]
    NDimArray(ArrayBase<D, Dim>),
    Array(ArrayBase<D, Dim>),
}

pub fn deserialize_fixed<'de, D, const N: usize, De>(
    deserializer: De,
) -> Result<ArrayBase<D, Dim<[Ix; N]>>, De::Error>
where
    D: DataOwned,
    D::Elem: Deserialize<'de>,
    Dim<[Ix; N]>: Dimension + Deserialize<'de>,
    ArrayBase<D, Dim<[Ix; N]>>: MakeNDim<Item = D::Elem>,
    De: Deserializer<'de>,
{
    Ok(match ValuesType::deserialize(deserializer)? {
        ValuesType::NDimArray(values) => values,
        ValuesType::Array(values) => values,
    })
}

pub fn deserialize_dyn<'de, D, De>(deserializer: De) -> Result<ArrayBase<D, IxDyn>, De::Error>
where
    D: DataOwned,
    D::Elem: Deserialize<'de>,
    ArrayBase<D, IxDyn>: MakeNDim<Item = D::Elem>,
    De: Deserializer<'de>,
{
    Ok(match ValuesType::deserialize(deserializer)? {
        ValuesType::NDimArray(values) => values,
        ValuesType::Array(values) => values,
    })
}