use nu_cmd_base::input_handler::{operate, CmdArgument};
use nu_engine::CallExt;
use nu_protocol::{
ast::{Call, CellPath},
engine::{Command, EngineState, Stack},
Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Span, SyntaxShape,
Type, Value,
};
use num_traits::ToPrimitive;
pub struct Arguments {
cell_paths: Option<Vec<CellPath>>,
}
impl CmdArgument for Arguments {
fn take_cell_paths(&mut self) -> Option<Vec<CellPath>> {
self.cell_paths.take()
}
}
#[derive(Clone)]
pub struct BitsInto;
impl Command for BitsInto {
fn name(&self) -> &str {
"into bits"
}
fn signature(&self) -> Signature {
Signature::build("into bits")
.input_output_types(vec![
(Type::Binary, Type::String),
(Type::Int, Type::String),
(Type::Filesize, Type::String),
(Type::Duration, Type::String),
(Type::String, Type::String),
(Type::Bool, Type::String),
(Type::Date, Type::String),
(Type::Table(vec![]), Type::Table(vec![])),
(Type::Record(vec![]), Type::Record(vec![])),
])
.allow_variants_without_examples(true) .rest(
"rest",
SyntaxShape::CellPath,
"for a data structure input, convert data at the given cell paths",
)
.category(Category::Conversions)
}
fn usage(&self) -> &str {
"Convert value to a binary primitive."
}
fn search_terms(&self) -> Vec<&str> {
vec!["convert", "cast"]
}
fn run(
&self,
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
into_bits(engine_state, stack, call, input)
}
fn examples(&self) -> Vec<Example> {
vec![
Example {
description: "convert a binary value into a string, padded to 8 places with 0s",
example: "01b | into bits",
result: Some(Value::string("00000001",
Span::test_data(),
)),
},
Example {
description: "convert an int into a string, padded to 8 places with 0s",
example: "1 | into bits",
result: Some(Value::string("00000001",
Span::test_data(),
)),
},
Example {
description: "convert a filesize value into a string, padded to 8 places with 0s",
example: "1b | into bits",
result: Some(Value::string("00000001",
Span::test_data(),
)),
},
Example {
description: "convert a duration value into a string, padded to 8 places with 0s",
example: "1ns | into bits",
result: Some(Value::string("00000001",
Span::test_data(),
)),
},
Example {
description: "convert a boolean value into a string, padded to 8 places with 0s",
example: "true | into bits",
result: Some(Value::string("00000001",
Span::test_data(),
)),
},
Example {
description: "convert a datetime value into a string, padded to 8 places with 0s",
example: "2023-04-17T01:02:03 | into bits",
result: Some(Value::string("01001101 01101111 01101110 00100000 01000001 01110000 01110010 00100000 00110001 00110111 00100000 00110000 00110001 00111010 00110000 00110010 00111010 00110000 00110011 00100000 00110010 00110000 00110010 00110011",
Span::test_data(),
)),
},
Example {
description: "convert a string into a raw binary string, padded with 0s to 8 places",
example: "'nushell.sh' | into bits",
result: Some(Value::string("01101110 01110101 01110011 01101000 01100101 01101100 01101100 00101110 01110011 01101000",
Span::test_data(),
)),
},
]
}
}
fn into_bits(
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
let head = call.head;
let cell_paths = call.rest(engine_state, stack, 0)?;
let cell_paths = (!cell_paths.is_empty()).then_some(cell_paths);
match input {
PipelineData::ExternalStream { stdout: None, .. } => {
Ok(Value::binary(vec![], head).into_pipeline_data())
}
PipelineData::ExternalStream {
stdout: Some(stream),
..
} => {
let output = stream.into_bytes()?;
Ok(Value::binary(output.item, head).into_pipeline_data())
}
_ => {
let args = Arguments { cell_paths };
operate(action, args, input, call.head, engine_state.ctrlc.clone())
}
}
}
fn convert_to_smallest_number_type(num: i64, span: Span) -> Value {
if let Some(v) = num.to_i8() {
let bytes = v.to_ne_bytes();
let mut raw_string = "".to_string();
for ch in bytes {
raw_string.push_str(&format!("{:08b} ", ch));
}
Value::string(raw_string.trim(), span)
} else if let Some(v) = num.to_i16() {
let bytes = v.to_ne_bytes();
let mut raw_string = "".to_string();
for ch in bytes {
raw_string.push_str(&format!("{:08b} ", ch));
}
Value::string(raw_string.trim(), span)
} else if let Some(v) = num.to_i32() {
let bytes = v.to_ne_bytes();
let mut raw_string = "".to_string();
for ch in bytes {
raw_string.push_str(&format!("{:08b} ", ch));
}
Value::string(raw_string.trim(), span)
} else {
let bytes = num.to_ne_bytes();
let mut raw_string = "".to_string();
for ch in bytes {
raw_string.push_str(&format!("{:08b} ", ch));
}
Value::string(raw_string.trim(), span)
}
}
pub fn action(input: &Value, _args: &Arguments, span: Span) -> Value {
match input {
Value::Binary { val, .. } => {
let mut raw_string = "".to_string();
for ch in val {
raw_string.push_str(&format!("{:08b} ", ch));
}
Value::string(raw_string.trim(), span)
}
Value::Int { val, .. } => convert_to_smallest_number_type(*val, span),
Value::Filesize { val, .. } => convert_to_smallest_number_type(*val, span),
Value::Duration { val, .. } => convert_to_smallest_number_type(*val, span),
Value::String { val, .. } => {
let raw_bytes = val.as_bytes();
let mut raw_string = "".to_string();
for ch in raw_bytes {
raw_string.push_str(&format!("{:08b} ", ch));
}
Value::string(raw_string.trim(), span)
}
Value::Bool { val, .. } => {
let v = <i64 as From<bool>>::from(*val);
convert_to_smallest_number_type(v, span)
}
Value::Date { val, .. } => {
let value = val.format("%c").to_string();
let bytes = value.as_bytes();
let mut raw_string = "".to_string();
for ch in bytes {
raw_string.push_str(&format!("{:08b} ", ch));
}
Value::string(raw_string.trim(), span)
}
Value::Error { .. } => input.clone(),
other => Value::error(
ShellError::OnlySupportsThisInputType {
exp_input_type: "int, filesize, string, date, duration, binary, or bool".into(),
wrong_type: other.get_type().to_string(),
dst_span: span,
src_span: other.span(),
},
span,
),
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn test_examples() {
use crate::test_examples;
test_examples(BitsInto {})
}
}