/*global global*/
(function pdcomment_init() {
    // parses the prettydiff settings comment
    //
    // - Source Priorities:
    // * the prettydiff comment is only accepted if it occurs before non-comments (near the top)
    // * options.source is the priority material for reading the comment
    // * the prettydiff comment will be processed from options.diff only if it present there, missing from options.source, and options.mode is diff
    //
    // - Examples:
    //    /*prettydiff.com width:80 preserve:4*/
    //    /* prettydiff.com width:80 preserve:4 */
    //    /*prettydiff.com width=80 preserve=4 */
    //    // prettydiff.com width=80 preserve:4
    //    <!-- prettydiff.com width:80 preserve=4 -->
    //    <!--prettydiff.com width:40 preserve:2-->
    //
    // - Parsing Considerations:
    // * there may be any amount of space at the start or end of the comment
    // * "prettydiff.com" must exist at the start of the comment
    // * comment must exist prior to non-comment tokens (near top of code)
    // * parameters are name value pairs separated by white space
    // * the delimiter separating name and value is either ":" or "=" characters
    "use strict";
    const pdcomment = function pdcomment_(options) {
            let pdcom = options.source.search(/((\/(\*|\/))|<!--*)\s*prettydiff\.com/), a = (pdcom > -1)
                ? pdcom
                : options.diff.search(/((\/(\*|\/))|<!--*)\s*prettydiff\.com/), b = 0, quote = "", op = [];
            const ops = [], source = (pdcom > -1)
                ? options.source
                : options.diff, len = source.length, comment = (source.charAt(a) === "<")
                ? "<!--"
                : (source.charAt(a + 1) === "/")
                    ? "//"
                    : "/\u002a", esc = function pdcomment_esc() {
                if (source.charAt(a - 1) !== "\\") {
                    return false;
                }
                let x = a;
                do {
                    x = x - 1;
                } while (x > 0 && source.charAt(x) === "\\");
                if ((a - x) % 2 === 0) {
                    return true;
                }
                return false;
            };
    };
    global.prettydiff.api.pdcommenttttt = pdcomment;
}());