forked from extern/nushell
303 lines
8.9 KiB
Rust
303 lines
8.9 KiB
Rust
use nu_engine::CallExt;
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use nu_protocol::{
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ast::{Call, CellPath},
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engine::{Command, EngineState, Stack},
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Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Value,
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};
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struct Arguments {
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radix: Option<Value>,
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column_paths: Vec<CellPath>,
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}
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#[derive(Clone)]
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pub struct SubCommand;
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impl Command for SubCommand {
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fn name(&self) -> &str {
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"into int"
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}
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fn signature(&self) -> Signature {
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Signature::build("into int")
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.named("radix", SyntaxShape::Number, "radix of integer", Some('r'))
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.rest(
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"rest",
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SyntaxShape::CellPath,
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"column paths to convert to int (for table input)",
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)
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.category(Category::Conversions)
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}
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fn usage(&self) -> &str {
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"Convert value to integer"
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
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into_int(engine_state, stack, call, input)
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}
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "Convert string to integer in table",
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example: "echo [[num]; ['-5'] [4] [1.5]] | into int num",
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result: None,
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},
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Example {
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description: "Convert string to integer",
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example: "'2' | into int",
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result: Some(Value::test_int(2)),
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},
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Example {
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description: "Convert decimal to integer",
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example: "5.9 | into int",
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result: Some(Value::test_int(5)),
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},
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Example {
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description: "Convert decimal string to integer",
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example: "'5.9' | into int",
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result: Some(Value::test_int(5)),
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},
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Example {
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description: "Convert file size to integer",
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example: "4KB | into int",
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result: Some(Value::Int {
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val: 4000,
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span: Span::test_data(),
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}),
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},
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Example {
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description: "Convert bool to integer",
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example: "[$false, $true] | into int",
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result: Some(Value::List {
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vals: vec![Value::test_int(0), Value::test_int(1)],
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span: Span::test_data(),
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}),
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},
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Example {
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description: "Convert to integer from binary",
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example: "'1101' | into int -r 2",
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result: Some(Value::test_int(13)),
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},
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Example {
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description: "Convert to integer from hex",
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example: "'FF' | into int -r 16",
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result: Some(Value::test_int(255)),
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},
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]
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}
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}
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fn into_int(
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
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let head = call.head;
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let options = Arguments {
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radix: call.get_flag(engine_state, stack, "radix")?,
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column_paths: call.rest(engine_state, stack, 0)?,
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};
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let radix: u32 = match options.radix {
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Some(Value::Int { val, .. }) => val as u32,
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Some(_) => 10,
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None => 10,
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};
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if let Some(val) = &options.radix {
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if !(2..=36).contains(&radix) {
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return Err(ShellError::UnsupportedInput(
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"Radix must lie in the range [2, 36]".to_string(),
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val.span()?,
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));
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}
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}
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input.map(
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move |v| {
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if options.column_paths.is_empty() {
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action(&v, head, radix)
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} else {
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let mut ret = v;
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for path in &options.column_paths {
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let r = ret.update_cell_path(
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&path.members,
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Box::new(move |old| action(old, head, radix)),
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);
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if let Err(error) = r {
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return Value::Error { error };
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}
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}
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ret
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}
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},
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engine_state.ctrlc.clone(),
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)
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}
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pub fn action(input: &Value, span: Span, radix: u32) -> Value {
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match input {
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Value::Int { val: _, .. } => {
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if radix == 10 {
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input.clone()
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} else {
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convert_int(input, span, radix)
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}
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}
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Value::Filesize { val, .. } => Value::Int { val: *val, span },
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Value::Float { val, .. } => Value::Int {
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val: *val as i64,
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span,
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},
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Value::String { val, .. } => {
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if radix == 10 {
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match int_from_string(val, span) {
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Ok(val) => Value::Int { val, span },
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Err(error) => Value::Error { error },
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}
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} else {
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convert_int(input, span, radix)
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}
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}
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Value::Bool { val, .. } => {
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if *val {
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Value::Int { val: 1, span }
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} else {
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Value::Int { val: 0, span }
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}
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}
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_ => Value::Error {
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error: ShellError::UnsupportedInput("'into int' for unsupported type".into(), span),
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},
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}
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}
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fn convert_int(input: &Value, head: Span, radix: u32) -> Value {
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let i = match input {
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Value::Int { val, .. } => val.to_string(),
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Value::String { val, .. } => {
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if val.starts_with("0x") || val.starts_with("0b") {
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match int_from_string(&val.to_string(), head) {
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Ok(x) => return Value::Int { val: x, span: head },
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Err(e) => return Value::Error { error: e },
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}
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}
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val.to_string()
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}
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_ => {
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return Value::Error {
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error: ShellError::UnsupportedInput(
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"only strings or integers are supported".to_string(),
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head,
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),
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}
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}
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};
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match i64::from_str_radix(&i, radix) {
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Ok(n) => Value::Int { val: n, span: head },
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Err(reason) => Value::Error {
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error: ShellError::CantConvert("".to_string(), reason.to_string(), head),
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},
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}
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}
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fn int_from_string(a_string: &str, span: Span) -> Result<i64, ShellError> {
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let trimmed = a_string.trim();
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match trimmed {
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b if b.starts_with("0b") => {
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let num = match i64::from_str_radix(b.trim_start_matches("0b"), 2) {
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Ok(n) => n,
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Err(reason) => {
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return Err(ShellError::CantConvert(
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"could not parse as integer".to_string(),
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reason.to_string(),
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span,
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))
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}
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};
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Ok(num)
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}
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h if h.starts_with("0x") => {
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let num = match i64::from_str_radix(h.trim_start_matches("0x"), 16) {
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Ok(n) => n,
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Err(reason) => {
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return Err(ShellError::CantConvert(
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"could not parse as int".to_string(),
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reason.to_string(),
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span,
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))
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}
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};
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Ok(num)
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}
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_ => match a_string.parse::<i64>() {
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Ok(n) => Ok(n),
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Err(_) => match a_string.parse::<f64>() {
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Ok(f) => Ok(f as i64),
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_ => Err(ShellError::CantConvert(
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"into int".to_string(),
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"string".to_string(),
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span,
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)),
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},
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},
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}
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}
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#[cfg(test)]
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mod test {
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use super::Value;
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use super::*;
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use nu_protocol::Type::Error;
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#[test]
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fn test_examples() {
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use crate::test_examples;
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test_examples(SubCommand {})
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}
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#[test]
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fn turns_to_integer() {
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let word = Value::test_string("10");
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let expected = Value::test_int(10);
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let actual = action(&word, Span::test_data(), 10);
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assert_eq!(actual, expected);
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}
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#[test]
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fn turns_binary_to_integer() {
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let s = Value::test_string("0b101");
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let actual = action(&s, Span::test_data(), 10);
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assert_eq!(actual, Value::test_int(5));
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}
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#[test]
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fn turns_hex_to_integer() {
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let s = Value::test_string("0xFF");
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let actual = action(&s, Span::test_data(), 16);
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assert_eq!(actual, Value::test_int(255));
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}
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#[test]
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fn communicates_parsing_error_given_an_invalid_integerlike_string() {
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let integer_str = Value::test_string("36anra");
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let actual = action(&integer_str, Span::test_data(), 10);
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assert_eq!(actual.get_type(), Error)
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}
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}
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