rust_3d/io/
xy.rs

1/*
2Copyright 2017 Martin Buck
3
4Permission is hereby granted, free of charge, to any person obtaining a copy
5of this software and associated documentation files (the "Software"),
6to deal in the Software without restriction, including without limitation the
7rights to use, copy, modify, merge, publish, distribute, sublicense,
8and/or sell copies of the Software, and to permit persons to whom the Software
9is furnished to do so, subject to the following conditions:
10
11The above copyright notice and this permission notice shall
12be included all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
15EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
17IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
19TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
20OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21*/
22
23//! Module for IO of the xy file format
24
25use crate::*;
26
27use std::{
28    fmt,
29    io::{BufRead, Error as ioError, Write},
30};
31
32use super::{types::*, utils::*};
33
34//------------------------------------------------------------------------------
35
36/// Saves an IsRandomAccessible<Is2D> as x y coordinates with a specified delimiter between coordinates and positions. E.g. used to create the .xy file format or .csv files
37pub fn save_xy<RA, P, W>(write: &mut W, ra: &RA, delim_coord: &str, delim_pos: &str) -> XyResult<()>
38where
39    RA: IsRandomAccessible<P>,
40    P: Is2D,
41    W: Write,
42{
43    let n = ra.len();
44    for i in 0..n {
45        let ref p = ra[i];
46        let buffer = p.x().to_string() + delim_coord + &p.y().to_string() + delim_pos;
47        write.write_all(buffer.as_bytes())?;
48    }
49    Ok(())
50}
51
52/// Loads a IsPushable<Is2D> as x y coordinates. E.g. used to load the .xy file format or .csv files
53pub fn load_xy<IP, P, R>(read: &mut R, ip: &mut IP) -> XyIOResult<()>
54where
55    IP: IsPushable<P>,
56    P: IsBuildable2D,
57    R: BufRead,
58{
59    let mut delim_determined = false;
60    let mut delim = 0;
61    let mut line_buffer = Vec::new();
62
63    let mut i_line = 0;
64
65    while let Ok(line) = fetch_line(read, &mut line_buffer) {
66        i_line += 1;
67
68        if !delim_determined {
69            delim = estimate_delimiter(1, line)
70                .ok_or(XyError::EstimateDelimiter)
71                .line(i_line, line)?;
72
73            delim_determined = true;
74        }
75
76        let mut words = line.split(|x| *x == delim).skip_empty();
77
78        let x = words
79            .next()
80            .and_then(|word| from_ascii(word))
81            .ok_or(XyError::Vertex)
82            .line(i_line, line)?;
83
84        let y = words
85            .next()
86            .and_then(|word| from_ascii(word))
87            .ok_or(XyError::Vertex)
88            .line(i_line, line)?;
89
90        ip.push(P::new(x, y));
91    }
92
93    Ok(())
94}
95
96//------------------------------------------------------------------------------
97
98/// Error type for .xy file operations
99pub enum XyError {
100    EstimateDelimiter,
101    AccessFile,
102    Vertex,
103}
104
105/// Result type for .xy file operations
106pub type XyResult<T> = std::result::Result<T, XyError>;
107
108/// Result type for .xy file operations
109pub type XyIOResult<T> = IOResult<T, XyError>;
110
111impl fmt::Debug for XyError {
112    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
113        match self {
114            Self::Vertex => write!(f, "Unable to parse vertex"),
115            Self::AccessFile => write!(f, "Unable to access file"),
116            Self::EstimateDelimiter => write!(f, "Unable to estimate delimiter"),
117        }
118    }
119}
120
121impl fmt::Display for XyError {
122    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
123        write!(f, "{:?}", self)
124    }
125}
126
127impl From<ioError> for XyError {
128    fn from(_error: ioError) -> Self {
129        XyError::AccessFile
130    }
131}
rust_3d/io/xy.rs

rust_3d/io/
xy.rs
