graph_builder/input/
mod.rs

1pub mod binary;
2#[cfg(feature = "dotgraph")]
3#[cfg_attr(all(feature = "dotgraph", has_doc_cfg), doc(cfg(feature = "dotgraph")))]
4pub mod dotgraph;
5pub mod edgelist;
6#[cfg(feature = "gdl")]
7#[cfg_attr(all(feature = "gdl", has_doc_cfg), doc(cfg(feature = "gdl")))]
8pub mod gdl;
9pub mod graph500;
10
11pub use binary::BinaryInput;
12#[cfg(feature = "dotgraph")]
13pub use dotgraph::DotGraph;
14#[cfg(feature = "dotgraph")]
15pub use dotgraph::DotGraphInput;
16pub use edgelist::EdgeList;
17pub use edgelist::EdgeListInput;
18pub use edgelist::Edges;
19pub use graph500::Graph500;
20pub use graph500::Graph500Input;
21
22use crate::index::Idx;
23
24pub struct InputPath<P>(pub(crate) P);
25
26pub trait InputCapabilities<NI: Idx> {
27    type GraphInput;
28}
29
30#[derive(Debug, Clone, Copy)]
31pub enum Direction {
32    Outgoing,
33    Incoming,
34    Undirected,
35}
36
37/// Used by input formats to read node or edge values from bytes.
38pub trait ParseValue: Default + Sized {
39    /// Parses a value from a slice.
40    ///
41    /// # Example
42    ///
43    /// ```
44    /// use graph_builder::input::ParseValue;
45    ///
46    /// let bytes = "13.37".as_bytes();
47    ///
48    /// let (number, len) = f32::parse(bytes);
49    ///
50    /// assert_eq!(number, 13.37);
51    /// assert_eq!(len, 5);
52    /// ```
53    ///
54    /// # Return
55    ///
56    /// Returns a tuple containing two entries. The first is the parsed value,
57    /// the second is the index of the byte right after the parsed value.
58    fn parse(bytes: &[u8]) -> (Self, usize);
59}
60
61impl ParseValue for () {
62    fn parse(_bytes: &[u8]) -> (Self, usize) {
63        ((), 0)
64    }
65}
66
67macro_rules! impl_parse_value {
68    ($atoi:path, $($ty:ty),+ $(,)?) => {
69        $(
70            impl $crate::input::ParseValue for $ty {
71                fn parse(bytes: &[u8]) -> (Self, usize) {
72                    if bytes.len() == 0 {
73                        (<$ty as ::std::default::Default>::default(), 0)
74                    } else {
75                        $atoi(bytes)
76                    }
77                }
78            }
79        )+
80    };
81}
82
83impl_parse_value!(
84    ::atoi::FromRadix10::from_radix_10,
85    u8,
86    u16,
87    u32,
88    u64,
89    u128,
90    usize,
91);
92
93impl_parse_value!(
94    ::atoi::FromRadix10Signed::from_radix_10_signed,
95    i8,
96    i16,
97    i32,
98    i64,
99    i128,
100    isize,
101);
102
103impl_parse_value!(parse_float, f32, f64);
104
105fn parse_float<T: fast_float2::FastFloat>(bytes: &[u8]) -> (T, usize) {
106    fast_float2::parse_partial(bytes).unwrap()
107}
graph_builder/input/mod.rs

graph_builder/input/
mod.rs
