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var oper = require('./Execute.js');

var Logarithm = (

function() {

function getBaseLog(x, y) {

/**

* x is base

* y is the value of which log is required

*/

return Math.log(y) / Math.log(x);

}

function log10(a, replace) {

function inner_log(a, b) {

return Number(getBaseLog(b, a).toFixed(8));

}

return oper.execute(a, 10, replace, inner_log);

}

function logE(a, replace) {

function inner_log(a, b) {

return Number(getBaseLog(b, a).toFixed(8));

}

return oper.execute(a, 2.7182818284590452353602874713527, replace, inner_log);

}

function log(a, b, replace) {

function inner_log(a, b) {

if (inner_log.shuffle) {

return Number(getBaseLog(a, b).toFixed(8));

} else {

return Number(getBaseLog(b, a).toFixed(8));

}

}

return oper.execute(a, b, replace, inner_log);

}

return {

log10: log10,

logE: logE,

log: log

}

}

);

module.exports = Logarithm();