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Remove BigDecimal and use i64/f64 instead

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This commit is contained in:
Stefan Stanciulescu 2021-11-03 08:38:31 +01:00
parent 78cc3452df
commit bf6c3e53a0
1 changed files with 18 additions and 141 deletions
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159
crates/nu-command/src/conversions/into/string.rs
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@ -5,11 +5,6 @@ use nu_protocol::{
Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Value,
};
use bigdecimal::{BigDecimal, FromPrimitive};
use num_bigint::{BigInt, BigUint};
use num_format::Locale;
use num_traits::{Pow, Signed};
use std::iter;
// TODO num_format::SystemLocale once platform-specific dependencies are stable (see Cargo.toml)
#[derive(Clone)]
@ -156,82 +151,54 @@ fn string_helper(
pub fn action(
input: Value,
head: Span,
span: Span,
decimals: bool,
digits: Option<i64>,
group_digits: bool,
) -> Value {
match input {
Value::Int { val, span: _ } => {
Value::Int { val, .. } => {
let res = if group_digits {
format_int(val) // int.to_formatted_string(*locale)
} else {
val.to_string()
};
Value::String {
val: res,
span: head,
}
Value::String { val: res, span }
}
Value::Float { val, span: _ } => {
Value::Float { val, .. } => {
if decimals {
let dec = BigDecimal::from_f64(val);
let decimal_value = digits.unwrap() as u64;
match dec {
Some(x) => Value::String {
val: format_decimal(x, Some(decimal_value), group_digits),
span: head,
},
None => Value::Error {
error: ShellError::CantConvert(
format!("cannot convert {} to BigDecimal", val),
head,
),
},
let decimal_value = digits.unwrap() as usize;
Value::String {
val: format!("{:.*}", decimal_value, val),
span,
}
} else {
Value::String {
val: val.to_string(),
span: head,
span,
}
}
}
// We do not seem to have BigInt at the moment as a Value Type
// Value::BigInt { val, span } => {
// let res = if group_digits {
// format_bigint(val) // int.to_formatted_string(*locale)
// } else {
// int.to_string()
// };
// Value::String {
// val: res,
// span: head,
// }
// .into_pipeline_data()
// }
Value::Bool { val, span: _ } => Value::String {
Value::Bool { val, .. } => Value::String {
val: val.to_string(),
span: head,
span,
},
Value::Date { val, span: _ } => Value::String {
Value::Date { val, .. } => Value::String {
val: val.format("%c").to_string(),
span: head,
span,
},
Value::String { val, span: _ } => Value::String { val, span: head },
Value::String { val, .. } => Value::String { val, span },
// FIXME - we do not have a FilePath type anymore. Do we need to support this?
// Value::FilePath(a_filepath) => a_filepath.as_path().display().to_string(),
Value::Filesize { val: _, span: _ } => Value::String {
Value::Filesize { val: _, .. } => Value::String {
val: input.into_string(),
span: head,
span,
},
Value::Nothing { span: _ } => Value::String {
Value::Nothing { .. } => Value::String {
val: "nothing".to_string(),
span: head,
span,
},
Value::Record {
cols: _,
@ -243,7 +210,6 @@ pub fn action(
head,
),
},
_ => Value::Error {
error: ShellError::CantConvert(
String::from(" into string. Probably this type is not supported yet"),
@ -269,95 +235,6 @@ fn format_int(int: i64) -> String {
// }
}
fn format_bigint(int: &BigInt) -> String {
int.to_string()
// TODO once platform-specific dependencies are stable (see Cargo.toml)
// #[cfg(windows)]
// {
// int.to_formatted_string(&Locale::en)
// }
// #[cfg(not(windows))]
// {
// match SystemLocale::default() {
// Ok(locale) => int.to_formatted_string(&locale),
// Err(_) => int.to_formatted_string(&Locale::en),
// }
// }
}
fn format_decimal(mut decimal: BigDecimal, digits: Option<u64>, group_digits: bool) -> String {
if let Some(n) = digits {
decimal = round_decimal(&decimal, n)
}
if decimal.is_integer() && (digits.is_none() || digits == Some(0)) {
let int = decimal.as_bigint_and_exponent().0;
// .expect("integer BigDecimal should convert to BigInt");
return if group_digits {
int.to_string()
} else {
format_bigint(&int)
};
}
let (int, exp) = decimal.as_bigint_and_exponent();
let factor = BigInt::from(10).pow(BigUint::from(exp as u64)); // exp > 0 for non-int decimal
let int_part = &int / &factor;
let dec_part = (&int % &factor)
.abs()
.to_biguint()
.expect("BigInt::abs should always produce positive signed BigInt and thus BigUInt")
.to_str_radix(10);
let dec_str = if let Some(n) = digits {
dec_part
.chars()
.chain(iter::repeat('0'))
.take(n as usize)
.collect()
} else {
String::from(dec_part.trim_end_matches('0'))
};
let format_default_loc = |int_part: BigInt| {
let loc = Locale::en;
//TODO: when num_format is available for recent bigint, replace this with the locale-based format
let (int_str, sep) = (int_part.to_string(), String::from(loc.decimal()));
format!("{}{}{}", int_str, sep, dec_str)
};
format_default_loc(int_part)
// TODO once platform-specific dependencies are stable (see Cargo.toml)
// #[cfg(windows)]
// {
// format_default_loc(int_part)
// }
// #[cfg(not(windows))]
// {
// match SystemLocale::default() {
// Ok(sys_loc) => {
// let int_str = int_part.to_formatted_string(&sys_loc);
// let sep = String::from(sys_loc.decimal());
// format!("{}{}{}", int_str, sep, dec_str)
// }
// Err(_) => format_default_loc(int_part),
// }
// }
}
fn round_decimal(decimal: &BigDecimal, mut digits: u64) -> BigDecimal {
let mut mag = decimal.clone();
while mag >= BigDecimal::from(1) {
mag = mag / 10;
digits += 1;
}
decimal.with_prec(digits)
}
#[cfg(test)]
mod test {
use super::*;