1use jrsonnet_evaluator::{2 bail,3 error::{ErrorKind::*, Result},4 function::builtin,5 typed::{Either2, M1},6 val::ArrValue,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(str1: String, str2: String) -> bool {37 str1.to_ascii_lowercase() == str2.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) => str.splitn(n + 1, &c as &str).map(Val::string).collect(),45 B(_) => str.split(&c as &str).map(Val::string).collect(),46 }47}4849#[builtin]50pub fn builtin_ascii_upper(str: IStr) -> String {51 str.to_ascii_uppercase()52}5354#[builtin]55pub fn builtin_ascii_lower(str: IStr) -> String {56 str.to_ascii_lowercase()57}5859#[builtin]60pub fn builtin_find_substr(pat: IStr, str: IStr) -> ArrValue {61 if pat.is_empty() || str.is_empty() || pat.len() > str.len() {62 return ArrValue::empty();63 }6465 let str = str.as_str();66 let pat = pat.as_bytes();67 let strb = str.as_bytes();6869 let max_pos = str.len() - pat.len();7071 let mut out: Vec<Val> = Vec::new();72 for (ch_idx, (i, _)) in str73 .char_indices()74 .take_while(|(i, _)| i <= &max_pos)75 .enumerate()76 {77 if &strb[i..i + pat.len()] == pat {78 out.push(Val::Num(ch_idx as f64))79 }80 }81 out.into()82}8384#[builtin]85pub fn builtin_parse_int(str: IStr) -> Result<f64> {86 if let Some(raw) = str.strip_prefix('-') {87 if raw.is_empty() {88 bail!("integer only consists of a minus")89 }9091 parse_nat::<10>(raw).map(|value| -value)92 } else {93 if str.is_empty() {94 bail!("empty integer")95 }9697 parse_nat::<10>(str.as_str())98 }99}100101#[builtin]102pub fn builtin_parse_octal(str: IStr) -> Result<f64> {103 if str.is_empty() {104 bail!("empty octal integer");105 }106107 parse_nat::<8>(str.as_str())108}109110#[builtin]111pub fn builtin_parse_hex(str: IStr) -> Result<f64> {112 if str.is_empty() {113 bail!("empty hexadecimal integer");114 }115116 parse_nat::<16>(str.as_str())117}118119fn parse_nat<const BASE: u32>(raw: &str) -> Result<f64> {120 debug_assert!(121 1 <= BASE && BASE <= 16,122 "integer base should be between 1 and 16"123 );124125 const ZERO_CODE: u32 = '0' as u32;126 const UPPER_A_CODE: u32 = 'A' as u32;127 const LOWER_A_CODE: u32 = 'a' as u32;128129 #[inline]130 fn checked_sub_if(condition: bool, lhs: u32, rhs: u32) -> Option<u32> {131 if condition {132 lhs.checked_sub(rhs)133 } else {134 None135 }136 }137138 let base = BASE as f64;139140 raw.chars().try_fold(0f64, |aggregate, digit| {141 let digit = digit as u32;142 let digit = if let Some(digit) = checked_sub_if(BASE > 10, digit, LOWER_A_CODE) {143 digit + 10144 } else if let Some(digit) = checked_sub_if(BASE > 10, digit, UPPER_A_CODE) {145 digit + 10146 } else {147 digit.checked_sub(ZERO_CODE).unwrap_or(BASE)148 };149150 if digit < BASE {151 Ok(base * aggregate + digit as f64)152 } else {153 bail!("{raw:?} is not a base {BASE} integer");154 }155 })156}157158#[cfg(feature = "exp-bigint")]159#[builtin]160pub fn builtin_bigint(v: Either![f64, IStr]) -> Result<Val> {161 use jrsonnet_evaluator::runtime_error;162 use Either2::*;163 Ok(match v {164 A(a) => {165 Val::BigInt(Box::new(a.to_string().parse().map_err(|e| {166 runtime_error!("number is not convertible to bigint: {e}")167 })?))168 }169 B(b) => Val::BigInt(Box::new(170 b.as_str()171 .parse()172 .map_err(|e| runtime_error!("bad bigint: {e}"))?,173 )),174 })175}176177#[cfg(test)]178mod tests {179 use super::*;180181 #[test]182 fn parse_nat_base_8() {183 assert_eq!(parse_nat::<8>("0").unwrap(), 0.);184 assert_eq!(parse_nat::<8>("5").unwrap(), 5.);185 assert_eq!(parse_nat::<8>("32").unwrap(), 0o32 as f64);186 assert_eq!(parse_nat::<8>("761").unwrap(), 0o761 as f64);187 }188189 #[test]190 fn parse_nat_base_10() {191 assert_eq!(parse_nat::<10>("0").unwrap(), 0.);192 assert_eq!(parse_nat::<10>("3").unwrap(), 3.);193 assert_eq!(parse_nat::<10>("27").unwrap(), 27.);194 assert_eq!(parse_nat::<10>("123").unwrap(), 123.);195 }196197 #[test]198 fn parse_nat_base_16() {199 assert_eq!(parse_nat::<16>("0").unwrap(), 0.);200 assert_eq!(parse_nat::<16>("A").unwrap(), 10.);201 assert_eq!(parse_nat::<16>("a9").unwrap(), 0xA9 as f64);202 assert_eq!(parse_nat::<16>("BbC").unwrap(), 0xBBC as f64);203 }204}205206#[builtin]207pub fn builtin_string_chars(str: IStr) -> ArrValue {208 ArrValue::chars(str.chars())209}