git.delta.rocks / jrsonnet / refs/commits / 4ab075dbe65c

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_equals_ignore_case(x: String, y: String) -> bool {37	x.to_ascii_lowercase() == y.to_ascii_lowercase()38}3940#[builtin]41pub fn builtin_splitlimit(str: IStr, c: IStr, maxsplits: Either![usize, M1]) -> ArrValue {42	use Either2::*;43	match maxsplits {44		A(n) => str45			.splitn(n + 1, &c as &str)46			.map(|s| Val::Str(StrValue::Flat(s.into())))47			.collect(),48		B(_) => str49			.split(&c as &str)50			.map(|s| Val::Str(StrValue::Flat(s.into())))51			.collect(),52	}53}5455#[builtin]56pub fn builtin_ascii_upper(str: IStr) -> String {57	str.to_ascii_uppercase()58}5960#[builtin]61pub fn builtin_ascii_lower(str: IStr) -> String {62	str.to_ascii_lowercase()63}6465#[builtin]66pub fn builtin_find_substr(pat: IStr, str: IStr) -> ArrValue {67	if pat.is_empty() || str.is_empty() || pat.len() > str.len() {68		return ArrValue::empty();69	}7071	let str = str.as_str();72	let pat = pat.as_bytes();73	let strb = str.as_bytes();7475	let max_pos = str.len() - pat.len();7677	let mut out: Vec<Val> = Vec::new();78	for (ch_idx, (i, _)) in str79		.char_indices()80		.take_while(|(i, _)| i <= &max_pos)81		.enumerate()82	{83		if &strb[i..i + pat.len()] == pat {84			out.push(Val::Num(ch_idx as f64))85		}86	}87	out.into()88}8990#[builtin]91pub fn builtin_parse_int(str: IStr) -> Result<f64> {92	if let Some(raw) = str.strip_prefix('-') {93		if raw.is_empty() {94			throw!("integer only consists of a minus")95		}9697		parse_nat::<10>(raw).map(|value| -value)98	} else {99		if str.is_empty() {100			throw!("empty integer")101		}102103		parse_nat::<10>(str.as_str())104	}105}106107#[builtin]108pub fn builtin_parse_octal(str: IStr) -> Result<f64> {109	if str.is_empty() {110		throw!("empty octal integer");111	}112113	parse_nat::<8>(str.as_str())114}115116#[builtin]117pub fn builtin_parse_hex(str: IStr) -> Result<f64> {118	if str.is_empty() {119		throw!("empty hexadecimal integer");120	}121122	parse_nat::<16>(str.as_str())123}124125fn parse_nat<const BASE: u32>(raw: &str) -> Result<f64> {126	debug_assert!(127		1 <= BASE && BASE <= 16,128		"integer base should be between 1 and 16"129	);130131	const ZERO_CODE: u32 = '0' as u32;132	const UPPER_A_CODE: u32 = 'A' as u32;133	const LOWER_A_CODE: u32 = 'a' as u32;134135	#[inline]136	fn checked_sub_if(condition: bool, lhs: u32, rhs: u32) -> Option<u32> {137		if condition {138			lhs.checked_sub(rhs)139		} else {140			None141		}142	}143144	let base = BASE as f64;145146	raw.chars().try_fold(0f64, |aggregate, digit| {147		let digit = digit as u32;148		let digit = if let Some(digit) = checked_sub_if(BASE > 10, digit, LOWER_A_CODE) {149			digit + 10150		} else if let Some(digit) = checked_sub_if(BASE > 10, digit, UPPER_A_CODE) {151			digit + 10152		} else {153			digit.checked_sub(ZERO_CODE).unwrap_or(BASE)154		};155156		if digit < BASE {157			Ok(base * aggregate + digit as f64)158		} else {159			throw!("{raw:?} is not a base {BASE} integer",);160		}161	})162}163164#[cfg(feature = "exp-bigint")]165#[builtin]166pub fn builtin_bigint(v: Either![f64, IStr]) -> Result<Val> {167	use Either2::*;168	Ok(match v {169		A(a) => Val::BigInt(Box::new((a as i64).into())),170		B(b) => Val::BigInt(Box::new(171			b.as_str()172				.parse()173				.map_err(|e| RuntimeError(format!("bad bigint: {e}").into()))?,174		)),175	})176}177178#[cfg(test)]179mod tests {180	use super::*;181182	#[test]183	fn parse_nat_base_8() {184		assert_eq!(parse_nat::<8>("0").unwrap(), 0.);185		assert_eq!(parse_nat::<8>("5").unwrap(), 5.);186		assert_eq!(parse_nat::<8>("32").unwrap(), 0o32 as f64);187		assert_eq!(parse_nat::<8>("761").unwrap(), 0o761 as f64);188	}189190	#[test]191	fn parse_nat_base_10() {192		assert_eq!(parse_nat::<10>("0").unwrap(), 0.);193		assert_eq!(parse_nat::<10>("3").unwrap(), 3.);194		assert_eq!(parse_nat::<10>("27").unwrap(), 27.);195		assert_eq!(parse_nat::<10>("123").unwrap(), 123.);196	}197198	#[test]199	fn parse_nat_base_16() {200		assert_eq!(parse_nat::<16>("0").unwrap(), 0.);201		assert_eq!(parse_nat::<16>("A").unwrap(), 10.);202		assert_eq!(parse_nat::<16>("a9").unwrap(), 0xA9 as f64);203		assert_eq!(parse_nat::<16>("BbC").unwrap(), 0xBBC as f64);204	}205}