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
use super::{get_number_bytes, NumberBytes};
use nu_engine::CallExt;
use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{
Category, Example, PipelineData, ShellError, Signature, Span, Spanned, SyntaxShape, Type, Value,
};
#[derive(Clone)]
pub struct SubCommand;
impl Command for SubCommand {
fn name(&self) -> &str {
"bits not"
}
fn signature(&self) -> Signature {
Signature::build("bits not")
.input_output_types(vec![(Type::Int, Type::Int)])
.vectorizes_over_list(true)
.switch(
"signed",
"always treat input number as a signed number",
Some('s'),
)
.named(
"number-bytes",
SyntaxShape::String,
"the size of unsigned number in bytes, it can be 1, 2, 4, 8, auto",
Some('n'),
)
.category(Category::Bits)
}
fn usage(&self) -> &str {
"Performs logical negation on each bit."
}
fn search_terms(&self) -> Vec<&str> {
vec!["negation"]
}
fn run(
&self,
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
let head = call.head;
let signed = call.has_flag("signed");
let number_bytes: Option<Spanned<String>> =
call.get_flag(engine_state, stack, "number-bytes")?;
let bytes_len = get_number_bytes(&number_bytes);
if let NumberBytes::Invalid = bytes_len {
if let Some(val) = number_bytes {
return Err(ShellError::UnsupportedInput(
"Only 1, 2, 4, 8, or 'auto' bytes are supported as word sizes".to_string(),
"value originates from here".to_string(),
head,
val.span,
));
}
}
if matches!(input, PipelineData::Empty) {
return Err(ShellError::PipelineEmpty { dst_span: head });
}
input.map(
move |value| operate(value, head, signed, bytes_len),
engine_state.ctrlc.clone(),
)
}
fn examples(&self) -> Vec<Example> {
vec![
Example {
description: "Apply logical negation to a list of numbers",
example: "[4 3 2] | bits not",
result: Some(Value::List {
vals: vec![
Value::test_int(140737488355323),
Value::test_int(140737488355324),
Value::test_int(140737488355325),
],
span: Span::test_data(),
}),
},
Example {
description:
"Apply logical negation to a list of numbers, treat input as 2 bytes number",
example: "[4 3 2] | bits not -n 2",
result: Some(Value::List {
vals: vec![
Value::test_int(65531),
Value::test_int(65532),
Value::test_int(65533),
],
span: Span::test_data(),
}),
},
Example {
description:
"Apply logical negation to a list of numbers, treat input as signed number",
example: "[4 3 2] | bits not -s",
result: Some(Value::List {
vals: vec![
Value::test_int(-5),
Value::test_int(-4),
Value::test_int(-3),
],
span: Span::test_data(),
}),
},
]
}
}
fn operate(value: Value, head: Span, signed: bool, number_size: NumberBytes) -> Value {
match value {
Value::Int { val, span } => {
if signed || val < 0 {
Value::Int { val: !val, span }
} else {
use NumberBytes::*;
let out_val = match number_size {
One => !val & 0x00_00_00_00_00_FF,
Two => !val & 0x00_00_00_00_FF_FF,
Four => !val & 0x00_00_FF_FF_FF_FF,
Eight => !val & 0x7F_FF_FF_FF_FF_FF,
Auto => {
if val <= 0xFF {
!val & 0x00_00_00_00_00_FF
} else if val <= 0xFF_FF {
!val & 0x00_00_00_00_FF_FF
} else if val <= 0xFF_FF_FF_FF {
!val & 0x00_00_FF_FF_FF_FF
} else {
!val & 0x7F_FF_FF_FF_FF_FF
}
}
Invalid => 0,
};
Value::Int { val: out_val, span }
}
}
other => match other {
Value::Error { .. } => other,
_ => Value::Error {
error: Box::new(ShellError::OnlySupportsThisInputType {
exp_input_type: "integer".into(),
wrong_type: other.get_type().to_string(),
dst_span: head,
src_span: other.expect_span(),
}),
},
},
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn test_examples() {
use crate::test_examples;
test_examples(SubCommand {})
}
}