The actual JSHINT function itself.
function (s, o) {
        var a, i, k;
        JSHINT.errors = [];
        predefined = Object.create(standard);
        if (o) {
            a = o.predef;
            if (a) {
                if (Array.isArray(a)) {
                    for (i = 0; i < a.length; i += 1) {
                        predefined[a[i]] = true;
                    }
                } else if (typeof a === 'object') {
                    k = Object.keys(a);
                    for (i = 0; i < k.length; i += 1) {
                        predefined[k[i]] = !!a[k];
                    }
                }
            }
            if (o.adsafe) {
                o.safe = true;
            }
            if (o.safe) {
                o.browser =
                o.css     =
                o.debug   =
                o.devel   =
                o.evil    =
                o.forin   =
                o.on      =
                o.rhino   =
                o.windows =
                o.sub     =
                o.widget  = false;

                o.eqeqeq  =
                o.nomen   =
                o.safe    =
                o.undef   = true;

                predefined.Date =
                predefined['eval'] =
                predefined.Function =
                predefined.Object = null;

                predefined.ADSAFE =
                predefined.lib = false;
            }
            option = o;
        } else {
            option = {};
        }
        option.indent = option.indent || 4;
        option.maxerr = option.maxerr || 50;
        adsafe_id = '';
        adsafe_may = false;
        adsafe_went = false;
        approved = {};
        if (option.approved) {
            for (i = 0; i < option.approved.length; i += 1) {
                approved[option.approved[i]] = option.approved[i];
            }
        } else {
            approved.test = 'test';
        }
        tab = '';
        for (i = 0; i < option.indent; i += 1) {
            tab += ' ';
        }
        indent = 1;
        global = Object.create(predefined);
        scope = global;
        funct = {
            '(global)': true,
            '(name)': '(global)',
            '(scope)': scope,
            '(breakage)': 0,
            '(loopage)': 0
        };
        functions = [funct];
        ids = {};
        urls = [];
        src = false;
        xmode = false;
        stack = null;
        member = {};
        membersOnly = null;
        implied = {};
        inblock = false;
        lookahead = [];
        jsonmode = false;
        warnings = 0;
        lex.init(s);
        prereg = true;
        strict_mode = false;

        prevtoken = token = nexttoken = syntax['(begin)'];
        assume();

        try {
            advance();
            if (nexttoken.value.charAt(0) === '<') {
                html();
                if (option.adsafe && !adsafe_went) {
                    warning("ADsafe violation: Missing ADSAFE.go.", this);
                }
            } else {
                switch (nexttoken.id) {
                case '{':
                case '[':
                    option.laxbreak = true;
                    jsonmode = true;
                    jsonValue();
                    break;
                case '@':
                case '*':
                case '#':
                case '.':
                case ':':
                    xmode = 'style';
                    advance();
                    if (token.id !== '@' || !nexttoken.identifier ||
                            nexttoken.value !== 'charset' || token.line !== 1 ||
                            token.from !== 1) {
                        error("A css file should begin with @charset 'UTF-8';");
                    }
                    advance();
                    if (nexttoken.type !== '(string)' &&
                            nexttoken.value !== 'UTF-8') {
                        error("A css file should begin with @charset 'UTF-8';");
                    }
                    advance();
                    advance(';');
                    styles();
                    break;

                default:
                    if (option.adsafe && option.fragment) {
                        error("Expected '{a}' and instead saw '{b}'.",
                            nexttoken, '<div>', nexttoken.value);
                    }
                    if (nexttoken.value === 'use strict') {
                        warning("Use the function form of \"use strict\".");
                        use_strict();
                    }
                    statements('lib');
                }
            }
            advance('(end)');
        } catch (e) {
            if (e) {
                JSHINT.errors.push({
                    reason    : e.message,
                    line      : e.line || nexttoken.line,
                    character : e.character || nexttoken.from
                }, null);
            }
        }
        return JSHINT.errors.length === 0;
    }