Print result in another base when appropriate

kalk/src/kalk_num/mod.rs

@@ -13,6 +13,7 @@ pub mod regular;
 pub use regular::*;
 
 use crate::ast::Expr;
+use crate::radix;
 use lazy_static::lazy_static;
 use std::collections::HashMap;
 use wasm_bindgen::prelude::*;
@@ -76,7 +77,7 @@ impl ScientificNotation {
         let mut digits_and_mul = if self.digits == "1" {
             String::new()
         } else {
-            format!("{}*", &self.digits)
+            format!("{}×", &self.digits)
         };
 
         if self.digits.len() > 1 {
@@ -107,8 +108,8 @@ impl KalkNum {
         complex_number_type: ComplexNumberType,
     ) -> ScientificNotation {
         let value_string = match complex_number_type {
-            ComplexNumberType::Real => self.to_string_real(),
-            ComplexNumberType::Imaginary => self.to_string_imaginary(false),
+            ComplexNumberType::Real => self.to_string_real(10),
+            ComplexNumberType::Imaginary => self.to_string_imaginary(10, false),
         }
         .trim_start_matches("-")
         .to_string();
@@ -170,12 +171,12 @@ impl KalkNum {
         }
     }
 
-    pub fn to_string_real(&self) -> String {
-        format_number(self.to_f64())
+    pub fn to_string_real(&self, radix: u8) -> String {
+        radix::to_radix_pretty(self.to_f64(), radix)
     }
 
-    pub fn to_string_imaginary(&self, include_i: bool) -> String {
-        let value = format_number(self.imaginary_to_f64());
+    pub fn to_string_imaginary(&self, radix: u8, include_i: bool) -> String {
+        let value = radix::to_radix_pretty(self.imaginary_to_f64(), radix);
         if include_i && value == "1" {
             String::from("i")
         } else if include_i && value == "-1" {
@@ -187,7 +188,7 @@ impl KalkNum {
         }
     }
 
-    pub fn to_string_pretty(&self) -> String {
+    fn to_string_pretty_radix(&self, radix: u8) -> String {
         if let Some(boolean_value) = self.boolean_value {
             return boolean_value.to_string();
         }
@@ -205,12 +206,16 @@ impl KalkNum {
         let sci_notation_real = self.to_scientific_notation(ComplexNumberType::Real);
         let mut adjusted_num = self.clone();
         let result_str = if (-6..8).contains(&sci_notation_real.exponent) || self.value == 0f64 {
-            self.to_string_real()
+            self.to_string_real(radix)
         } else if sci_notation_real.exponent <= -14 {
             adjusted_num.value = KalkNum::from(0f64).value;
             String::from("0")
         } else {
+            if radix == 10 {
                 sci_notation_real.to_string().trim().to_string()
+            } else {
+                return String::new();
+            }
         };
 
         let sci_notation_imaginary = self.to_scientific_notation(ComplexNumberType::Imaginary);
@@ -218,12 +223,16 @@ impl KalkNum {
             || self.imaginary_value == 0f64
             || self.imaginary_value == 1f64
         {
-            self.to_string_imaginary(true)
+            self.to_string_imaginary(radix, true)
         } else if sci_notation_imaginary.exponent <= -14 {
             adjusted_num.imaginary_value = KalkNum::from(0f64).value;
             String::from("0")
         } else {
+            if radix == 10 {
                 format!("{}", sci_notation_imaginary.to_string().trim())
+            } else {
+                return String::new();
+            }
         };
 
         let mut output = result_str;
@@ -256,7 +265,7 @@ impl KalkNum {
         }
 
         if let Some(estimate) = adjusted_num.estimate() {
-            if estimate != output {
+            if estimate != output && radix == 10 {
                 output.push_str(&format!(" ≈ {}", estimate));
             }
         }
@@ -264,6 +273,17 @@ impl KalkNum {
         output
     }
 
+    pub fn to_string_pretty(&self) -> String {
+        if let Some(other_radix) = self.other_radix {
+            let with_other_radix = self.to_string_pretty_radix(other_radix);
+            if with_other_radix != "" {
+                return format!("{}\n{}", self.to_string_pretty_radix(10), with_other_radix);
+            }
+        }
+
+        self.to_string_pretty_radix(10)
+    }
+
     pub fn is_too_big(&self) -> bool {
         self.value.is_infinite()
     }
@@ -474,13 +494,13 @@ impl KalkNum {
         if let Some(value) = rounded_real {
             output.push_str(&value);
         } else if self.has_real() {
-            output.push_str(&self.to_string_real());
+            output.push_str(&self.to_string_real(10));
         }
 
         let imaginary_value = if let Some(value) = rounded_imaginary {
             Some(value)
         } else if self.has_imaginary() {
-            Some(self.to_string_imaginary(false))
+            Some(self.to_string_imaginary(10, false))
         } else {
             None
         };
@@ -520,7 +540,9 @@ impl KalkNum {
     fn estimate_one_value(&self, complex_number_type: ComplexNumberType) -> Option<String> {
         let (value, value_string) = match complex_number_type {
             ComplexNumberType::Real => (&self.value, self.to_string()),
-            ComplexNumberType::Imaginary => (&self.imaginary_value, self.to_string_imaginary(true)),
+            ComplexNumberType::Imaginary => {
+                (&self.imaginary_value, self.to_string_imaginary(10, true))
+            }
         };
 
         let fract = value.clone().fract().abs();
@@ -679,7 +701,7 @@ impl KalkNum {
     }
 }
 
-fn format_number(input: f64) -> String {
+pub fn format_number(input: f64) -> String {
     let rounded = format!("{:.1$}", input, 10);
     if rounded.contains(".") {
         rounded

kalk/src/kalk_num/regular.rs

@@ -8,6 +8,7 @@ pub struct KalkNum {
     pub(crate) unit: String,
     pub(crate) imaginary_value: f64,
     pub(crate) boolean_value: Option<bool>,
+    pub(crate) other_radix: Option<u8>,
 }
 
 #[wasm_bindgen]
@@ -18,6 +19,7 @@ impl KalkNum {
             unit: unit.to_string(),
             imaginary_value: 0f64,
             boolean_value: None,
+            other_radix: None,
         }
     }
 
@@ -31,6 +33,7 @@ impl KalkNum {
                 imaginary_value
             },
             boolean_value: None,
+            other_radix: None,
         }
     }
 
@@ -40,6 +43,7 @@ impl KalkNum {
             unit: String::new(),
             imaginary_value: value,
             boolean_value: None,
+            other_radix: None,
         }
     }
 
@@ -49,6 +53,7 @@ impl KalkNum {
             unit: String::new(),
             imaginary_value: 0f64,
             boolean_value: Some(value),
+            other_radix: None,
         }
     }
 

kalk/src/kalk_num/with_rug.rs

@@ -12,6 +12,7 @@ pub struct KalkNum {
     pub(crate) unit: String,
     pub(crate) imaginary_value: Float,
     pub(crate) boolean_value: Option<bool>,
+    pub(crate) other_radix: Option<u8>,
 }
 
 impl KalkNum {
@@ -22,6 +23,7 @@ impl KalkNum {
             unit: unit.to_string(),
             imaginary_value: Float::with_val(precision, 0),
             boolean_value: None,
+            other_radix: None,
         }
     }
 
@@ -35,6 +37,7 @@ impl KalkNum {
                 imaginary_value
             },
             boolean_value: None,
+            other_radix: None,
         }
     }
 
@@ -44,6 +47,7 @@ impl KalkNum {
             unit: String::new(),
             imaginary_value: value,
             boolean_value: None,
+            other_radix: None,
         }
     }
 
@@ -53,6 +57,7 @@ impl KalkNum {
             unit: String::new(),
             imaginary_value: Float::with_val(63, 0),
             boolean_value: Some(value),
+            other_radix: None,
         }
     }
 

kalk/src/lexer.rs

@@ -56,18 +56,23 @@ pub struct Token {
 pub struct Lexer<'a> {
     chars: Peekable<Chars<'a>>,
     index: usize,
+    other_radix: Option<u8>,
 }
 
 impl<'a> Lexer<'a> {
-    pub fn lex(source: &str) -> Vec<Token> {
-        let mut lexer = Lexer {
+    pub fn new(source: &'a str) -> Self {
+        Lexer {
             chars: source.chars().peekable(),
             index: 0,
-        };
+            other_radix: None,
+        }
+    }
+
+    pub fn lex(&mut self) -> Vec<Token> {
         let mut tokens = Vec::new();
 
         loop {
-            let next = lexer.next();
+            let next = self.next();
 
             if let TokenKind::EOF = next.kind {
                 tokens.push(next);
@@ -80,6 +85,10 @@ impl<'a> Lexer<'a> {
         tokens
     }
 
+    pub fn get_other_radix(&self) -> Option<u8> {
+        self.other_radix
+    }
+
     fn next(&mut self) -> Token {
         let eof = build(TokenKind::EOF, "", (self.index, self.index));
         let mut c = if let Some(c) = self.peek() {
@@ -179,7 +188,7 @@ impl<'a> Lexer<'a> {
         let mut end = start;
         let mut value = String::new();
         let mut leading_zero = self.peek().unwrap_or(&'\0') == &'0';
-        let mut base = 10u32;
+        let mut base = 10u8;
 
         loop {
             let c = if let Some(c) = self.peek() {
@@ -210,7 +219,7 @@ impl<'a> Lexer<'a> {
                 }
             }
 
-            if !c.is_digit(base) && c != '.' && c != '_' && !c.is_whitespace()
+            if !c.is_digit(base as u32) && c != '.' && c != '_' && !c.is_whitespace()
                 || c == '\n'
                 || c == '\r'
             {
@@ -231,12 +240,21 @@ impl<'a> Lexer<'a> {
 
         if base_str != "" {
             base = crate::text_utils::subscript_to_digits(base_str.chars())
-                .parse::<u32>()
+                .parse::<u8>()
                 .unwrap_or(10);
         }
 
         if base != 10 {
             value.push_str(&format!("_{}", base));
+            if let Some(other_radix) = self.other_radix {
+                // Don't bother keeping track of radixes
+                // if several different ones are used
+                if other_radix != base {
+                    self.other_radix = None;
+                }
+            } else {
+                self.other_radix = Some(base);
+            }
         }
 
         build(TokenKind::Literal, &value, (start, end))
@@ -358,7 +376,7 @@ mod tests {
     #[test]
     #[wasm_bindgen_test]
     fn test_token_kinds() {
-        let tokens = Lexer::lex("+-*/%^()|=!,");
+        let tokens = Lexer::new("+-*/%^()|=!,").lex();
         let expected = vec![
             TokenKind::Plus,
             TokenKind::Minus,
@@ -381,7 +399,7 @@ mod tests {
     #[test]
     #[wasm_bindgen_test]
     fn test_brackets() {
-        let tokens = Lexer::lex("[1 < 2]");
+        let tokens = Lexer::new("[1 < 2]").lex();
         let expected = vec![
             TokenKind::OpenBracket,
             TokenKind::Literal,
@@ -401,7 +419,7 @@ mod tests {
         let test_cases = vec![" ", "     ", "test ", " test     "];
 
         for input in test_cases {
-            let tokens = Lexer::lex(input);
+            let tokens = Lexer::new(input).lex();
 
             if regex::Regex::new(r"^\s*$").unwrap().is_match(input) {
                 let expected = vec![TokenKind::EOF];
@@ -417,7 +435,7 @@ mod tests {
     #[test_case("24")]
     #[test_case("56.4")]
     fn test_number_literal(input: &str) {
-        let tokens = Lexer::lex(input);
+        let tokens = Lexer::new(input).lex();
         let expected = vec![TokenKind::Literal, TokenKind::EOF];
 
         assert_eq!(&tokens[0].value, input);
@@ -427,7 +445,7 @@ mod tests {
     #[test_case("x")]
     #[test_case("xy")]
     fn test_identifier(input: &str) {
-        let tokens = Lexer::lex(input);
+        let tokens = Lexer::new(input).lex();
         let expected = vec![TokenKind::Identifier, TokenKind::EOF];
 
         assert_eq!(&tokens[0].value, input);
@@ -436,7 +454,7 @@ mod tests {
 
     #[test]
     fn test_function_call() {
-        let tokens = Lexer::lex("f(x)");
+        let tokens = Lexer::new("f(x)").lex();
         let expected = vec![
             TokenKind::Identifier,
             TokenKind::OpenParenthesis,

kalk/src/parser.rs

@@ -33,6 +33,7 @@ pub struct Context {
     is_in_integral: bool,
     current_function: Option<String>,
     current_function_parameters: Option<Vec<String>>,
+    other_radix: Option<u8>,
 }
 
 #[wasm_bindgen]
@@ -53,6 +54,7 @@ impl Context {
             is_in_integral: false,
             current_function: None,
             current_function_parameters: None,
+            other_radix: None,
         };
 
         parse(&mut context, crate::prelude::INIT).unwrap();
@@ -176,17 +178,25 @@ pub fn eval(
             None
         },
     );
-    interpreter.interpret(statements)
+    let result = interpreter.interpret(statements);
+    if let Ok(Some(mut num)) = result {
+        num.other_radix = context.other_radix;
+        Ok(Some(num))
+    } else {
+        result
+    }
 }
 
 /// Parse expressions/declarations and return a syntax tree.
 ///
 /// `None` will be returned if the last statement is a declaration.
 pub fn parse(context: &mut Context, input: &str) -> Result<Vec<Stmt>, CalcError> {
-    context.tokens = Lexer::lex(input);
+    let mut lexer = Lexer::new(input);
+    context.tokens = lexer.lex();
     context.pos = 0;
     context.parsing_unit_decl = false;
     context.unit_decl_base_unit = None;
+    context.other_radix = lexer.get_other_radix();
 
     let mut statements: Vec<Stmt> = Vec::new();
     while !is_at_end(context) {
@@ -856,7 +866,7 @@ fn is_at_end(context: &Context) -> bool {
 
 fn string_to_num(value: &str) -> Result<f64, CalcError> {
     let base = get_base(value)?;
-    if let Some(result) = crate::radix::parse_float_radix(value.replace(" ", ""), base) {
+    if let Some(result) = crate::radix::parse_float_radix(&value.replace(" ", ""), base) {
         Ok(result)
     } else {
         Err(CalcError::InvalidNumberLiteral(value.into()))

kalk/src/radix.rs

@@ -1,4 +1,4 @@
-pub fn parse_float_radix(value: String, radix: u8) -> Option<f64> {
+pub fn parse_float_radix(value: &str, radix: u8) -> Option<f64> {
     if radix == 10 {
         return if let Ok(result) = value.parse::<f64>() {
             Some(result)
@@ -9,7 +9,7 @@ pub fn parse_float_radix(value: String, radix: u8) -> Option<f64> {
 
     let mut sum = 0f64;
     let length = value.find('_').unwrap_or(value.len());
-    let mut i = (value.find('.').unwrap_or(length) - 1) as i32;
+    let mut i = (value.find('.').unwrap_or(length) as i32) - 1;
     for c in value.chars() {
         if c == '_' {
             break;
@@ -26,3 +26,46 @@ pub fn parse_float_radix(value: String, radix: u8) -> Option<f64> {
 
     return Some(sum);
 }
+
+const DIGITS: &'static str = "0123456789abcdefghijklmnopqrstuvwxyz";
+pub fn int_to_radix(value: i64, radix: u8) -> String {
+    let mut num = value.abs();
+    let mut result_str = String::new();
+    while num > 0 {
+        let digit_index = (num % radix as i64) as usize;
+        result_str.insert(0, DIGITS.as_bytes()[digit_index] as char);
+        num /= radix as i64;
+    }
+
+    if result_str == "" {
+        return String::from("0");
+    }
+
+    let sign = if value.is_positive() { "" } else { "-" };
+    format!("{}{}", sign, result_str)
+}
+
+pub fn float_to_radix(value: f64, radix: u8) -> String {
+    let mut result = int_to_radix(value.floor() as i64, radix);
+    let fract = value.fract();
+    if fract != 0f64 {
+        result.push('.');
+        let precision = 10;
+        let fract_digits = (fract * (radix as i64).pow(precision) as f64) as i64;
+        result.push_str(&int_to_radix(fract_digits, radix).trim_end_matches('0'))
+    }
+
+    result
+}
+
+pub fn to_radix_pretty(value: f64, radix: u8) -> String {
+    if radix == 10 {
+        crate::kalk_num::format_number(value)
+    } else {
+        format!(
+            "{}{}",
+            float_to_radix(value, radix),
+            crate::text_utils::digits_to_subscript(radix.to_string().chars())
+        )
+    }
+}