git.delta.rocks / jrsonnet / refs/commits / 83c939e4fa0b

1use jrsonnet_evaluator::{2	error::{ErrorKind::*, Result},3	function::builtin,4	throw,5	typed::{Either2, M1},6	val::{ArrValue, StrValue},7	Either, IStr, Val,8};910#[builtin]11pub const fn builtin_codepoint(str: char) -> u32 {12	str as u3213}1415#[builtin]16pub fn builtin_substr(str: IStr, from: usize, len: usize) -> String {17	str.chars().skip(from).take(len).collect()18}1920#[builtin]21pub fn builtin_char(n: u32) -> Result<char> {22	Ok(std::char::from_u32(n).ok_or_else(|| InvalidUnicodeCodepointGot(n))?)23}2425#[builtin]26pub fn builtin_str_replace(str: String, from: IStr, to: IStr) -> String {27	str.replace(&from as &str, &to as &str)28}2930#[builtin]31pub fn builtin_is_empty(str: String) -> bool {32	str.is_empty()33}3435#[builtin]36pub fn builtin_splitlimit(str: IStr, c: IStr, maxsplits: Either![usize, M1]) -> ArrValue {37	use Either2::*;38	match maxsplits {39		A(n) => str40			.splitn(n + 1, &c as &str)41			.map(|s| Val::Str(StrValue::Flat(s.into())))42			.collect(),43		B(_) => str44			.split(&c as &str)45			.map(|s| Val::Str(StrValue::Flat(s.into())))46			.collect(),47	}48}4950#[builtin]51pub fn builtin_ascii_upper(str: IStr) -> String {52	str.to_ascii_uppercase()53}5455#[builtin]56pub fn builtin_ascii_lower(str: IStr) -> String {57	str.to_ascii_lowercase()58}5960#[builtin]61pub fn builtin_find_substr(pat: IStr, str: IStr) -> ArrValue {62	if pat.is_empty() || str.is_empty() || pat.len() > str.len() {63		return ArrValue::empty();64	}6566	let str = str.as_str();67	let pat = pat.as_bytes();68	let strb = str.as_bytes();6970	let max_pos = str.len() - pat.len();7172	let mut out: Vec<Val> = Vec::new();73	for (ch_idx, (i, _)) in str74		.char_indices()75		.take_while(|(i, _)| i <= &max_pos)76		.enumerate()77	{78		if &strb[i..i + pat.len()] == pat {79			out.push(Val::Num(ch_idx as f64))80		}81	}82	out.into()83}8485#[builtin]86pub fn builtin_parse_int(str: IStr) -> Result<f64> {87	if let Some(raw) = str.strip_prefix('-') {88		if raw.is_empty() {89			throw!("integer only consists of a minus")90		}9192		parse_nat::<10>(raw).map(|value| -value)93	} else {94		if str.is_empty() {95			throw!("empty integer")96		}9798		parse_nat::<10>(str.as_str())99	}100}101102#[builtin]103pub fn builtin_parse_octal(str: IStr) -> Result<f64> {104	if str.is_empty() {105		throw!("empty octal integer");106	}107108	parse_nat::<8>(str.as_str())109}110111#[builtin]112pub fn builtin_parse_hex(str: IStr) -> Result<f64> {113	if str.is_empty() {114		throw!("empty hexadecimal integer");115	}116117	parse_nat::<16>(str.as_str())118}119120fn parse_nat<const BASE: u32>(raw: &str) -> Result<f64> {121	debug_assert!(122		1 <= BASE && BASE <= 16,123		"integer base should be between 1 and 16"124	);125126	const ZERO_CODE: u32 = '0' as u32;127	const UPPER_A_CODE: u32 = 'A' as u32;128	const LOWER_A_CODE: u32 = 'a' as u32;129130	#[inline]131	fn checked_sub_if(condition: bool, lhs: u32, rhs: u32) -> Option<u32> {132		if condition {133			lhs.checked_sub(rhs)134		} else {135			None136		}137	}138139	let base = BASE as f64;140141	raw.chars().try_fold(0f64, |aggregate, digit| {142		let digit = digit as u32;143		let digit = if let Some(digit) = checked_sub_if(BASE > 10, digit, LOWER_A_CODE) {144			digit + 10145		} else if let Some(digit) = checked_sub_if(BASE > 10, digit, UPPER_A_CODE) {146			digit + 10147		} else {148			digit.checked_sub(ZERO_CODE).unwrap_or(BASE)149		};150151		if digit < BASE {152			Ok(base * aggregate + digit as f64)153		} else {154			throw!("{raw:?} is not a base {BASE} integer",);155		}156	})157}158159#[cfg(feature = "exp-bigint")]160#[builtin]161pub fn builtin_bigint(v: Either![f64, IStr]) -> Result<Val> {162	use Either2::*;163	Ok(match v {164		A(a) => Val::BigInt(Box::new((a as i64).into())),165		B(b) => Val::BigInt(Box::new(166			b.as_str()167				.parse()168				.map_err(|e| RuntimeError(format!("bad bigint: {e}").into()))?,169		)),170	})171}172173#[cfg(test)]174mod tests {175	use super::*;176177	#[test]178	fn parse_nat_base_8() {179		assert_eq!(parse_nat::<8>("0").unwrap(), 0.);180		assert_eq!(parse_nat::<8>("5").unwrap(), 5.);181		assert_eq!(parse_nat::<8>("32").unwrap(), 0o32 as f64);182		assert_eq!(parse_nat::<8>("761").unwrap(), 0o761 as f64);183	}184185	#[test]186	fn parse_nat_base_10() {187		assert_eq!(parse_nat::<10>("0").unwrap(), 0.);188		assert_eq!(parse_nat::<10>("3").unwrap(), 3.);189		assert_eq!(parse_nat::<10>("27").unwrap(), 27.);190		assert_eq!(parse_nat::<10>("123").unwrap(), 123.);191	}192193	#[test]194	fn parse_nat_base_16() {195		assert_eq!(parse_nat::<16>("0").unwrap(), 0.);196		assert_eq!(parse_nat::<16>("A").unwrap(), 10.);197		assert_eq!(parse_nat::<16>("a9").unwrap(), 0xA9 as f64);198		assert_eq!(parse_nat::<16>("BbC").unwrap(), 0xBBC as f64);199	}200}