testing functions.js

/**
 * Converts the string to RGBA
 * @param {String} string the color string containing hex values
 * @param {Number} [a=1] Alpha (Optional). Defaults to 1. 
 */
function fromString(devTools, string, a=1) {
    var startTime = performance.now();
    // ### Tools
    let hexValues = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"];
    var pos = 0;
    
    // ### Argument Verification
    if (typeof a !== 'number') throw new InvalidArgumentError("Alpha specified must be a number");
    if (typeof string !== 'string') throw new InvalidArgumentError("String specified must be a string");

    string = string.toLowerCase();

    // remove leading '#' if present
    string = string.startsWith("#") ? string.slice(1, string.length) : string;

    if (a < 0 || a > 1) throw new InvalidArgumentError("Alpha specified must be between (Inclusive) 0 and 1");

    if (string.length != 6 && string.length != 3) throw new InvalidArgumentError("String specified must be made of 6 hex values (RRGGBB) or 3 hex values (RGB)");

    // check to make sure hexes are valid
    string.split("").forEach((val) => {
        if (hexValues.indexOf(val) == -1) {
            throw new InvalidArgumentError("Unexpected hex character '" + val + "' at position '" + (pos + 1) + "'");
        }
        pos++;
    });

    // ### MAIN
    var val = Math.floor(string.length / 3); // Used for calculating Hex Position, so code knows where R section, G section, and B section is.
    var r = string.slice(0, val);
    var g = string.slice(val, val * 2);
    var b = string.slice(val * 2, val * 3);

    // used to convert the hex to a number. (All it does is convert the base 16 item to base 10)
    var converter = (value) => {
        var returnValue = 0;
        // split into character array
        var subValues = value.split("");
        subValues.forEach((subVal, index) => {
            // multiplier, AKA get the base, then its value
            let multiplier = Math.pow(hexValues.length, subValues.length - index - 1);
            returnValue += multiplier * hexValues.indexOf(subVal);
        });
        return returnValue;
    }

    // ### Assign Values
    r = converter(r);
    g = converter(g);
    b = converter(b);

    var endTime = performance.now();
    var message = `SMALL ARRAY: ${(endTime - startTime)}ms`;
    if (devTools)
        console.log(message);
    else
        document.getElementById("output").value += message + "\n";
    
    return {
        r: r,
        g: g,
        b: b,
        a: a
    };
}

/**
 * A MAYBE more efficient verson of fromString.
 * 
 * Converts the string to RGBA
 * @param {String} string the color string containing hex values
 * @param {Number} [a=1] Alpha (Optional). Defaults to 1. 
 */
function fromString2(devTools, string, a=1) {
    var startTime = performance.now();
    // ### Tools
    let hexValues = ["00","01","02","03","04","05","06","07","08","09","0a","0b","0c","0d","0e","0f","10","11","12","13","14","15","16","17","18","19","1a","1b","1c","1d","1e","1f","20","21","22","23","24","25","26","27","28","29","2a","2b","2c","2d","2e","2f","30","31","32","33","34","35","36","37","38","39","3a","3b","3c","3d","3e","3f","40","41","42","43","44","45","46","47","48","49","4a","4b","4c","4d","4e","4f","50","51","52","53","54","55","56","57","58","59","5a","5b","5c","5d","5e","5f","60","61","62","63","64","65","66","67","68","69","6a","6b","6c","6d","6e","6f","70","71","72","73","74","75","76","77","78","79","7a","7b","7c","7d","7e","7f","80","81","82","83","84","85","86","87","88","89","8a","8b","8c","8d","8e","8f","90","91","92","93","94","95","96","97","98","99","9a","9b","9c","9d","9e","9f","a0","a1","a2","a3","a4","a5","a6","a7","a8","a9","aa","ab","ac","ad","ae","af","b0","b1","b2","b3","b4","b5","b6","b7","b8","b9","ba","bb","bc","bd","be","bf","c0","c1","c2","c3","c4","c5","c6","c7","c8","c9","ca","cb","cc","cd","ce","cf","d0","d1","d2","d3","d4","d5","d6","d7","d8","d9","da","db","dc","dd","de","df","e0","e1","e2","e3","e4","e5","e6","e7","e8","e9","ea","eb","ec","ed","ee","ef","f0","f1","f2","f3","f4","f5","f6","f7","f8","f9","fa","fb","fc","fd","fe","ff"];
    var pos = 0;

    // ### Argument Verification
    if (typeof a !== 'number') throw new InvalidArgumentError("Alpha specified must be a number");
    if (typeof string !== 'string') throw new InvalidArgumentError("String specified must be a string");

    string = string.toLowerCase();

    // remove leading '#' if present
    string = string.startsWith("#") ? string.slice(1, string.length) : string;

    if (a < 0 || a > 1) throw new InvalidArgumentError("Alpha specified must be between (Inclusive) 0 and 1");

    if (string.length != 6 && string.length != 3) throw new InvalidArgumentError("String specified must be made of 6 hex values (RRGGBB) or 3 hex values (RGB)");
    // ### MAIN
    var val = Math.floor(string.length / 3); // Used for calculating Hex Position, so code knows where R section, G section, and B section is.
    var r = string.slice(0, val);

    // check r
    if (hexValues.indexOf(r) == -1) throw new InvalidArgumentError("Unexpected hex '" + r + "' at position '" + (pos + 1) + "'");
    pos += val;


    var g = string.slice(val, val * 2);

    // check g
    if (hexValues.includes(g) == -1) throw new InvalidArgumentError("Unexpected hex '" + g + "' at position '" + (pos + 1) + "'");
    pos += val;


    var b = string.slice(val * 2, val * 3);

    // check b
    if (!hexValues.includes(b)) throw new InvalidArgumentError("Unexpected hex '" + b + "' at position '" + (pos + 1) + "'");
    pos += val;
    
    // ### Assign Values
    r = hexValues.indexOf(r);
    g = hexValues.indexOf(g);
    b = hexValues.indexOf(b);

    
    var endTime = performance.now();
    var message = `BIG ARRAY: ${(endTime - startTime)}ms`;
    if (devTools)
        console.log(message);
    else
        document.getElementById("output").value += message + "\n";
    
    return {
        r: r,
        g: g,
        b: b,
        a: a
    };
}

class InvalidArgumentError extends Error {
    /**
     * Called whenever an invalid argument was specified.
     * @param {String} message The message of the error
     */
    constructor(message) {
        super(message);
    }
}