rpn-cli/cli.js

Command line RPN calculator using math.js engine. example: '$ rpn 1 2 +'

#!/usr/bin/env node
// Generated by CoffeeScript 2.4.1
//!/usr/bin/env coffee
var E, T, appName, command, debugConsole, e, formula, input, opt, optSymbols, options, parse, parsedInput, precision, readFromStdin, regex;

opt = require('getopt');

command = 'normal';

debugConsole = null;

readFromStdin = false;

precision = 14;

T = console.log;

E = console.error;

process.argv.shift();

appName = require('path').basename(process.argv.shift());

optSymbols = 'h?dsb';

regex = /^-[h\?dsb]+$/;

formula = process.argv.filter(function(x) {
  return !x.match(regex);
});

options = process.argv.filter(function(x) {
  return x.match(regex);
});

opt.setopt(optSymbols, options);

opt.getopt(function(o, p) {
  switch (o) {
    case 'h':
    case '?':
      return command = 'usage';
    case 'd':
      return debugConsole = console.error;
    case 's':
      return readFromStdin = true;
    case 'b':
      return precision = 64;
  }
});

parse = function(formula) {
  var s;
  s = formula.join(' ');
  s = s.replace(/([^-0-9.e])/g, ' $1');
  s = s.replace(/([^e, ])-/g, '$1 - ');
  s = s.replace(/(-?[0-9.]+e?-?[0-9.]*)/g, ' $1');
  s = s.replace(/,/g, ' ');
  return s.split(/ +/).filter(function(x) {
    return x.length > 0;
  });
};

formula = parse(formula);

if (typeof debugConsole === "function") {
  debugConsole(`params:${formula.join(' ')}`);
}

if (readFromStdin) {
  input = require('fs').readFileSync('/dev/stdin', 'utf8');
  parsedInput = input.split(/[\s\n]+/).filter(function(x) {
    return x.length > 0;
  });
  parsedInput = parse(parsedInput);
  if (typeof debugConsole === "function") {
    debugConsole(`stdin:${parsedInput.join(' ')}`);
  }
  formula = parsedInput.concat(formula);
}

if (typeof debugConsole === "function") {
  debugConsole(`formula:${formula.join(' ')}`);
}

if (formula.length === 0 && !readFromStdin) {
  command = 'usage';
}

switch (command) {
  case 'usage':
    console.log(`${appName} [-${optSymbols}] <formula>\nversion 2.1.2\nCopyright(c) 2017-2019 @kssfilo(https://kanasys.com/gtech/)\n\noptions:\n	-d:debug\n	-s:mix stdin "<stdin formula> <command line formula>"\n	-b:64 digits precition mode (default:14 digits)\n	-h/-?:this help\n\noperators:\n	+:add last two stack elements\n	-:subtract element 1 from element 2\n	x:multiply last two stack elements (* is ok but need escape in bash)\n	/:divide element 2 by element 1\n	%:element 2 mod element 1\n\n	^:raise element 2 to the power of element 1\n	v:n-th root (element 1 root of element 2)\n	2v:(combination) squrare root\n\n	n:Negate last element\n	i:Invert last element\n	a:Absolute value (last element)\n	l:Log e (last element)\n	L:exponent of e (last element,reverse function of Log e)\n	f:Factorial (last element,! is ok but need escape in bash)\n\n	s:Sin (last element,ragian)\n	c:Cos (last element,ragian)\n	t:Tan (last element,radian)\n	S:arcSin (last element,radian)\n	C:arcCos (last element,radian)\n	T:arcTan (last element,radian)\n	P/180x:(combination) radian -> degree (last element)\n	180/Px:(combination) degree -> radian (last element)\n\n	_:floor last element\n	=:round last element\n	1+_:(combination) ceil last element\n\n	w:sWap last 2 elements\n	r:Rotate all elements(1 2 3 -> 3 1 2)\n	R:Rotate all elements(1 2 3 -> 2 3 1)\n	d:Drop last element\n	D:Drop all elements\n	V:Drop except last elements\n	p:duP last element\n\n	Y:move last element to 0th Register\n	y:recall from 0th Register\n	Q:move element 2 to <element 1>th Register\n	q:recall from <element 1>th Register\n\n	N:couNt all elements and push to stack\n	M:find Max of all elements and push to stack\n	m:find Min of all elements and push to stack\n	A:sum of All elements and push to stack\n	X:product of all elements and push to stack\n\n	F:apply next operator to all elements(1,2,3,F,1,+ -> 2,3,4)\n\n	NyAY/V:(combination) arithmetic mean(avarage)\n	NyXYvV:(combination) geometric mean\n	NyAY/F-F2^AY1-/2vV:(combination) standard deviation\n\nconstants:\n	P:Pi\n	1L:(combination) base of natural logarithm(e)\n\nnumber:\n	e:Exponent (5e3 -> 5000/5e-3 -> 0.005)\n	-:negative(<any operator/number>- -> subtract,for example:1-1 -> 1 - 1 but 1 -1 -> 1 -1)\n\nexample:\n	${appName} 1 2 +  #result:3\n	${appName} 1 2 1++ #result:4\n	${appName} 1,2,1++ #result:4\n	\n	${appName} 1 2 1 + +|${appName} -s 3 + #pipeline:same as ${appName} 1 2 1 + + 3 +\n	${appName} -s <<<'1 2 +' #dc style\n	\n	${appName} 5e3 5 / #same as ${appName} 5000 5 /\n	${appName} 10 3 /=  #round:3.3333 -> 3\n`);
    break;
  default:
    try {
      T(require('./rpn')({formula, debugConsole, precision}).join(' '));
    } catch (error) {
      e = error;
      E(e);
    }
}