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
191
192
193
194
195
196
197
198
199
use rust_decimal::prelude::ToPrimitive;
use std::fmt::{self, Write as FmtWrite};
use std::io::Write as IoWrite;
use super::{Field, Token, Value};
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
struct XorAndPipe<W> {
acc: u8,
downstream: W,
}
impl<W> IoWrite for XorAndPipe<W>
where
W: IoWrite,
{
fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
self.acc = buf.iter().fold(self.acc, |acc, b| acc ^ b);
self.downstream.write(buf)
}
fn flush(&mut self) -> std::io::Result<()> {
self.downstream.flush()
}
}
impl<W> FmtWrite for XorAndPipe<W>
where
W: FmtWrite,
{
fn write_str(&mut self, s: &str) -> fmt::Result {
self.acc = s.bytes().fold(self.acc, |acc, b| acc ^ b);
self.downstream.write_str(s)
}
}
impl<W> XorAndPipe<W> {
fn reset(&mut self) {
self.acc = 0;
}
fn checksum(&self) -> u8 {
self.acc
}
}
#[derive(Debug, Clone, Default)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct FormatOptions {
pub checksums: bool,
pub line_numbers: bool,
pub delimit_with_percent: bool,
}
macro_rules! formatter_core {
($program: ident, $opts: ident, $downstream: ident) => {
use Token::*;
let mut preceded_by_newline = true;
let mut line_number = 1usize;
let mut w = XorAndPipe {
acc: 0,
downstream: $downstream,
};
if $opts.delimit_with_percent {
writeln!(w, "%")?;
w.reset();
}
for token in $program {
if let Token::Field(f) = token {
if preceded_by_newline && f.letters == "N" {
continue;
}
}
if $opts.line_numbers && preceded_by_newline {
write!(w, "N{} ", line_number)?;
}
match token {
Field(f) => {
if !preceded_by_newline {
if matches!(f.letters.as_ref(), "G" | "M" | "D") {
if $opts.checksums {
write!(w, "*{}", w.checksum())?;
}
line_number += 1;
writeln!(w)?;
w.reset();
if $opts.line_numbers {
write!(w, "N{} ", line_number)?;
}
} else {
write!(w, " ")?;
}
}
write!(w, "{}", f)?;
preceded_by_newline = false;
}
Comment {
is_inline: true,
inner,
} => {
write!(w, "({})", inner)?;
preceded_by_newline = false;
}
Comment {
is_inline: false,
inner,
} => {
if $opts.checksums {
write!(w, "*{}", w.checksum())?;
}
line_number += 1;
writeln!(w, ";{}", inner)?;
w.reset();
preceded_by_newline = true;
}
}
}
if !preceded_by_newline {
if $opts.checksums {
write!(w, "*{}", w.checksum())?;
w.reset();
}
writeln!(w)?;
}
if $opts.delimit_with_percent {
write!(w, "%")?;
}
};
}
pub fn format_gcode_io<W>(program: &[Token<'_>], opts: FormatOptions, w: W) -> std::io::Result<()>
where
W: IoWrite,
{
formatter_core!(program, opts, w);
Ok(())
}
pub fn format_gcode_fmt<W>(program: &[Token<'_>], opts: FormatOptions, w: W) -> fmt::Result
where
W: FmtWrite,
{
formatter_core!(program, opts, w);
Ok(())
}
impl fmt::Display for Token<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
use Token::*;
match self {
Field(field) => write!(f, "{}", field),
Comment { is_inline, inner } => match is_inline {
true => write!(f, "({})", inner),
false => write!(f, ";{}", inner),
},
}
}
}
impl<'a> fmt::Display for Field<'a> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}{}", self.letters, self.value)
}
}
impl fmt::Display for Value<'_> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::Rational(r) => {
if r.fract().is_zero() {
if let Some(i64_rep) = r.to_i64() {
return write!(f, "{}.", i64_rep);
}
}
write!(f, "{}", r)
}
Self::Float(float) => write!(f, "{}", float),
Self::Integer(i) => write!(f, "{}", i),
Self::String(s) => write!(f, "\"{}\"", s),
}
}
}