BashMath

BashMath allows for the evaluation of mathematical expressions directly from the command line.

Installation

Currently, the BashMath project comes included with all source necessary to build Bash.

git clone github.com/isaiahsimeone/BashMath.git

cd BashMath

./configure && make Then, sudo make install Or just ./bash

Usage

Once installed, BashMath will 'hijack' commands sent into bash that start with either: a digit (0-9 inclusive), or an '=' character. Shell scripts are not affected by this. Any shell script that worked in bash before, will still work.

Features

Supported operators include: +, -, /, *, %, |, ^, &, ~, <<, >> and **
Summation of expressions over a range, e.g. =sum x over 1...3 in 3 * x
Variable assignment and use in expressions
Proper order of operations, and operation associativity
Error detection of malformed brackets, unrecognised/unexpected symbols

Todo

Improve performance of summation statement (re-parses expression for each pass of the summation.)
Allow for base conversions. Currently, all bases convert into decimal. Add functions like bin(), hex(), oct() to convert numeric bases.

Changelog

2.0 - 25/06/21

Added variable assignment and use within expression
Added the summation statement which can be used for example like: =sum x over 1...3 in 3*x
Added a help display which can be shown by typing '=help' in Bash
Refactored math_parser.c into seperate files: mp_scanner.c, mp_parser.c, mp_error.c and mp_main.c.

1.0 - 1/12/20

. Created BashMath

isaiahsimeone/BashMath