;(function (root, factory, undef) {
    if (typeof exports === "object") {
        // CommonJS
        module.exports = exports = factory(require("./core"), require("./cipher-core"));
    } else if (typeof define === "function" && define.amd) {
        // AMD
        define(["./core", "./cipher-core"], factory);
    } else {
        // Global (browser)
        factory(root.CryptoJS);
    }
}(this, function (CryptoJS) {

    /** @preserve
     * Counter block mode compatible with  Dr Brian Gladman fileenc.c
     * derived from CryptoJS.mode.CTR
     * Jan Hruby jhruby.web@gmail.com
     */
    CryptoJS.mode.CTRGladman = (function () {
        var CTRGladman = CryptoJS.lib.BlockCipherMode.extend();

        function incWord(word) {
            if (((word >> 24) & 0xff) === 0xff) { //overflow
                var b1 = (word >> 16) & 0xff;
                var b2 = (word >> 8) & 0xff;
                var b3 = word & 0xff;

                if (b1 === 0xff) // overflow b1
                {
                    b1 = 0;
                    if (b2 === 0xff) {
                        b2 = 0;
                        if (b3 === 0xff) {
                            b3 = 0;
                        } else {
                            ++b3;
                        }
                    } else {
                        ++b2;
                    }
                } else {
                    ++b1;
                }

                word = 0;
                word += (b1 << 16);
                word += (b2 << 8);
                word += b3;
            } else {
                word += (0x01 << 24);
            }
            return word;
        }

        function incCounter(counter) {
            if ((counter[0] = incWord(counter[0])) === 0) {
                // encr_data in fileenc.c from  Dr Brian Gladman's counts only with DWORD j < 8
                counter[1] = incWord(counter[1]);
            }
            return counter;
        }

        var Encryptor = CTRGladman.Encryptor = CTRGladman.extend({
            processBlock: function (words, offset) {
                // Shortcuts
                var cipher = this._cipher
                var blockSize = cipher.blockSize;
                var iv = this._iv;
                var counter = this._counter;

                // Generate keystream
                if (iv) {
                    counter = this._counter = iv.slice(0);

                    // Remove IV for subsequent blocks
                    this._iv = undefined;
                }

                incCounter(counter);

                var keystream = counter.slice(0);
                cipher.encryptBlock(keystream, 0);

                // Encrypt
                for (var i = 0; i < blockSize; i++) {
                    words[offset + i] ^= keystream[i];
                }
            }
        });

        CTRGladman.Decryptor = Encryptor;

        return CTRGladman;
    }());


    return CryptoJS.mode.CTRGladman;

}));