From 7ec8ed6cdddc555ec9d824d58d17f06bf9aa3038 Mon Sep 17 00:00:00 2001
From: NerdyPepper <akshayoppiliappan@gmail.com>
Date: Sat, 27 Apr 2019 22:22:20 +0530
Subject: refactor main.rs

---
 src/main.rs | 83 +++----------------------------------------------------------
 1 file changed, 3 insertions(+), 80 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 28af074..5846a87 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -14,6 +14,8 @@ mod parse;
 use crate::parse::*;
 mod error;
 use crate::error::{ CalcError, handler };
+mod format;
+use crate::format::*;
 
 // extern crates
 use rustyline::error::ReadlineError;
@@ -84,63 +86,6 @@ fn main() {
     }
 }
 
-fn pprint(ans: f64) {
-    let ans_string = radix_fmt(ans, CONFIGURATION.base).unwrap();
-    let ans_vector: Vec<&str> = ans_string.split(".").collect();
-    match ans_vector.len() {
-        1 => println!("{:>10}", thousand_sep(ans_vector[0])),
-        2 => println!("{:>10}.{}", thousand_sep(ans_vector[0]),ans_vector[1]),
-        _ => ()
-    }
-}
-
-fn radix_fmt(number: f64, obase: usize) -> Result<String, CalcError> {
-    if obase > 36 {
-        return Err(CalcError::Syntax("Unknown base".into()));
-    }
-
-    let table: Vec<char> = "0123456789abcdefghijklmnopqrstuvwxyz".chars().collect();
-
-    // format integral part of float
-    let mut integral = number.trunc() as i64;
-    let mut obase_int = String::new();
-    while integral >= obase as i64 {
-        obase_int.push(table[(integral % obase as i64) as usize]);
-        integral /= obase as i64;
-    }
-    obase_int.push(table[integral as usize]);
-    if number.is_sign_negative() {
-        obase_int.push('-');
-    }
-    let obase_int = obase_int.chars().rev().collect::<String>();
-
-    // format fractional part of float
-    let mut fract = number.abs().fract();
-    let mut obase_fract = String::new();
-    let mut i = 0;
-    loop {
-        fract *= obase as f64;
-        obase_fract.push(table[fract.trunc() as usize]);
-        i += 1;
-        if fract.fract() == 0. || i > 10 {
-            break;
-        }
-        fract = fract.fract();
-    }
-    Ok(format!("{}.{}", obase_int, obase_fract))
-}
-
-fn thousand_sep(inp: &str) -> String {
-    let mut result_string = String::new();
-    for (i,c) in inp.to_string().chars().rev().enumerate() {
-        if i % 3 == 0 && i != 0 && c.to_string() != "-" {
-            result_string.push(',');
-        }
-        result_string.push(c)
-    }
-    result_string.chars().rev().collect::<String>()
-}
-
 fn parse_arguments() -> Configuration {
     let config = App::new(env!("CARGO_PKG_NAME"))
         .version(env!("CARGO_PKG_VERSION"))
@@ -185,28 +130,6 @@ fn parse_arguments() -> Configuration {
     }
 }
 
-fn autobalance_parens(input: &str) -> Result<String, CalcError> {
-    let mut balanced = String::from(input);
-    let mut left_parens = 0;
-    let mut right_parens = 0;
-    for letter in input.chars() {
-        if letter == '(' {
-            left_parens += 1;
-        } else if letter == ')' {
-            right_parens += 1;
-        }
-    }
-
-    if left_parens > right_parens {
-        let extras = ")".repeat(left_parens - right_parens);
-        balanced.push_str(&extras[..]);
-        Ok(balanced)
-    } else if left_parens < right_parens {
-        return Err(CalcError::Syntax("Mismatched parentheses!".into()))
-    } else {
-        Ok(balanced)
-    }
-}
 
 fn eval_math_expression(input: &str) -> Result<f64, CalcError> {
     let input = input.trim();
@@ -214,7 +137,7 @@ fn eval_math_expression(input: &str) -> Result<f64, CalcError> {
     if input.len() == 0 {
         return Ok(0.)
     }
-    let input        = autobalance_parens(&input[..])?;
+    let input        = format::autobalance_parens(&input[..])?;
     let lexed        = lexer(&input[..])?;
     let postfixed    = to_postfix(lexed)?;
     let evaled       = eval_postfix(postfixed)?;
-- 
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