// Loaded from https://dev.jspm.io/npm:jszip@3.5.0/lib/utils.dew.js


import { dew as _supportDewDew } from "./support.dew.js";
import { dew as _base64DewDew } from "./base64.dew.js";
import { dew as _nodejsUtilsDewDew } from "./nodejsUtils.dew.js";
import { dew as _npmSetImmediateShimDew } from "/npm:set-immediate-shim@1.0?dew";
import { dew as _externalDewDew } from "./external.dew.js";
var exports = {},
    _dewExec = false;
export function dew() {
  if (_dewExec) return exports;
  _dewExec = true;

  var support = _supportDewDew();

  var base64 = _base64DewDew();

  var nodejsUtils = _nodejsUtilsDewDew();

  var setImmediate = _npmSetImmediateShimDew();

  var external = _externalDewDew();
  /**
   * Convert a string that pass as a "binary string": it should represent a byte
   * array but may have > 255 char codes. Be sure to take only the first byte
   * and returns the byte array.
   * @param {String} str the string to transform.
   * @return {Array|Uint8Array} the string in a binary format.
   */


  function string2binary(str) {
    var result = null;

    if (support.uint8array) {
      result = new Uint8Array(str.length);
    } else {
      result = new Array(str.length);
    }

    return stringToArrayLike(str, result);
  }
  /**
   * Create a new blob with the given content and the given type.
   * @param {String|ArrayBuffer} part the content to put in the blob. DO NOT use
   * an Uint8Array because the stock browser of android 4 won't accept it (it
   * will be silently converted to a string, "[object Uint8Array]").
   *
   * Use only ONE part to build the blob to avoid a memory leak in IE11 / Edge:
   * when a large amount of Array is used to create the Blob, the amount of
   * memory consumed is nearly 100 times the original data amount.
   *
   * @param {String} type the mime type of the blob.
   * @return {Blob} the created blob.
   */


  exports.newBlob = function (part, type) {
    exports.checkSupport("blob");

    try {
      // Blob constructor
      return new Blob([part], {
        type: type
      });
    } catch (e) {
      try {
        // deprecated, browser only, old way
        var Builder = self.BlobBuilder || self.WebKitBlobBuilder || self.MozBlobBuilder || self.MSBlobBuilder;
        var builder = new Builder();
        builder.append(part);
        return builder.getBlob(type);
      } catch (e) {
        // well, fuck ?!
        throw new Error("Bug : can't construct the Blob.");
      }
    }
  };
  /**
   * The identity function.
   * @param {Object} input the input.
   * @return {Object} the same input.
   */


  function identity(input) {
    return input;
  }
  /**
   * Fill in an array with a string.
   * @param {String} str the string to use.
   * @param {Array|ArrayBuffer|Uint8Array|Buffer} array the array to fill in (will be mutated).
   * @return {Array|ArrayBuffer|Uint8Array|Buffer} the updated array.
   */


  function stringToArrayLike(str, array) {
    for (var i = 0; i < str.length; ++i) {
      array[i] = str.charCodeAt(i) & 0xFF;
    }

    return array;
  }
  /**
   * An helper for the function arrayLikeToString.
   * This contains static information and functions that
   * can be optimized by the browser JIT compiler.
   */


  var arrayToStringHelper = {
    /**
     * Transform an array of int into a string, chunk by chunk.
     * See the performances notes on arrayLikeToString.
     * @param {Array|ArrayBuffer|Uint8Array|Buffer} array the array to transform.
     * @param {String} type the type of the array.
     * @param {Integer} chunk the chunk size.
     * @return {String} the resulting string.
     * @throws Error if the chunk is too big for the stack.
     */
    stringifyByChunk: function (array, type, chunk) {
      var result = [],
          k = 0,
          len = array.length; // shortcut

      if (len <= chunk) {
        return String.fromCharCode.apply(null, array);
      }

      while (k < len) {
        if (type === "array" || type === "nodebuffer") {
          result.push(String.fromCharCode.apply(null, array.slice(k, Math.min(k + chunk, len))));
        } else {
          result.push(String.fromCharCode.apply(null, array.subarray(k, Math.min(k + chunk, len))));
        }

        k += chunk;
      }

      return result.join("");
    },

    /**
     * Call String.fromCharCode on every item in the array.
     * This is the naive implementation, which generate A LOT of intermediate string.
     * This should be used when everything else fail.
     * @param {Array|ArrayBuffer|Uint8Array|Buffer} array the array to transform.
     * @return {String} the result.
     */
    stringifyByChar: function (array) {
      var resultStr = "";

      for (var i = 0; i < array.length; i++) {
        resultStr += String.fromCharCode(array[i]);
      }

      return resultStr;
    },
    applyCanBeUsed: {
      /**
       * true if the browser accepts to use String.fromCharCode on Uint8Array
       */
      uint8array: function () {
        try {
          return support.uint8array && String.fromCharCode.apply(null, new Uint8Array(1)).length === 1;
        } catch (e) {
          return false;
        }
      }(),

      /**
       * true if the browser accepts to use String.fromCharCode on nodejs Buffer.
       */
      nodebuffer: function () {
        try {
          return support.nodebuffer && String.fromCharCode.apply(null, nodejsUtils.allocBuffer(1)).length === 1;
        } catch (e) {
          return false;
        }
      }()
    }
  };
  /**
   * Transform an array-like object to a string.
   * @param {Array|ArrayBuffer|Uint8Array|Buffer} array the array to transform.
   * @return {String} the result.
   */

  function arrayLikeToString(array) {
    // Performances notes :
    // --------------------
    // String.fromCharCode.apply(null, array) is the fastest, see
    // see http://jsperf.com/converting-a-uint8array-to-a-string/2
    // but the stack is limited (and we can get huge arrays !).
    //
    // result += String.fromCharCode(array[i]); generate too many strings !
    //
    // This code is inspired by http://jsperf.com/arraybuffer-to-string-apply-performance/2
    // TODO : we now have workers that split the work. Do we still need that ?
    var chunk = 65536,
        type = exports.getTypeOf(array),
        canUseApply = true;

    if (type === "uint8array") {
      canUseApply = arrayToStringHelper.applyCanBeUsed.uint8array;
    } else if (type === "nodebuffer") {
      canUseApply = arrayToStringHelper.applyCanBeUsed.nodebuffer;
    }

    if (canUseApply) {
      while (chunk > 1) {
        try {
          return arrayToStringHelper.stringifyByChunk(array, type, chunk);
        } catch (e) {
          chunk = Math.floor(chunk / 2);
        }
      }
    } // no apply or chunk error : slow and painful algorithm
    // default browser on android 4.*


    return arrayToStringHelper.stringifyByChar(array);
  }

  exports.applyFromCharCode = arrayLikeToString;
  /**
   * Copy the data from an array-like to an other array-like.
   * @param {Array|ArrayBuffer|Uint8Array|Buffer} arrayFrom the origin array.
   * @param {Array|ArrayBuffer|Uint8Array|Buffer} arrayTo the destination array which will be mutated.
   * @return {Array|ArrayBuffer|Uint8Array|Buffer} the updated destination array.
   */

  function arrayLikeToArrayLike(arrayFrom, arrayTo) {
    for (var i = 0; i < arrayFrom.length; i++) {
      arrayTo[i] = arrayFrom[i];
    }

    return arrayTo;
  } // a matrix containing functions to transform everything into everything.


  var transform = {}; // string to ?

  transform["string"] = {
    "string": identity,
    "array": function (input) {
      return stringToArrayLike(input, new Array(input.length));
    },
    "arraybuffer": function (input) {
      return transform["string"]["uint8array"](input).buffer;
    },
    "uint8array": function (input) {
      return stringToArrayLike(input, new Uint8Array(input.length));
    },
    "nodebuffer": function (input) {
      return stringToArrayLike(input, nodejsUtils.allocBuffer(input.length));
    }
  }; // array to ?

  transform["array"] = {
    "string": arrayLikeToString,
    "array": identity,
    "arraybuffer": function (input) {
      return new Uint8Array(input).buffer;
    },
    "uint8array": function (input) {
      return new Uint8Array(input);
    },
    "nodebuffer": function (input) {
      return nodejsUtils.newBufferFrom(input);
    }
  }; // arraybuffer to ?

  transform["arraybuffer"] = {
    "string": function (input) {
      return arrayLikeToString(new Uint8Array(input));
    },
    "array": function (input) {
      return arrayLikeToArrayLike(new Uint8Array(input), new Array(input.byteLength));
    },
    "arraybuffer": identity,
    "uint8array": function (input) {
      return new Uint8Array(input);
    },
    "nodebuffer": function (input) {
      return nodejsUtils.newBufferFrom(new Uint8Array(input));
    }
  }; // uint8array to ?

  transform["uint8array"] = {
    "string": arrayLikeToString,
    "array": function (input) {
      return arrayLikeToArrayLike(input, new Array(input.length));
    },
    "arraybuffer": function (input) {
      return input.buffer;
    },
    "uint8array": identity,
    "nodebuffer": function (input) {
      return nodejsUtils.newBufferFrom(input);
    }
  }; // nodebuffer to ?

  transform["nodebuffer"] = {
    "string": arrayLikeToString,
    "array": function (input) {
      return arrayLikeToArrayLike(input, new Array(input.length));
    },
    "arraybuffer": function (input) {
      return transform["nodebuffer"]["uint8array"](input).buffer;
    },
    "uint8array": function (input) {
      return arrayLikeToArrayLike(input, new Uint8Array(input.length));
    },
    "nodebuffer": identity
  };
  /**
   * Transform an input into any type.
   * The supported output type are : string, array, uint8array, arraybuffer, nodebuffer.
   * If no output type is specified, the unmodified input will be returned.
   * @param {String} outputType the output type.
   * @param {String|Array|ArrayBuffer|Uint8Array|Buffer} input the input to convert.
   * @throws {Error} an Error if the browser doesn't support the requested output type.
   */

  exports.transformTo = function (outputType, input) {
    if (!input) {
      // undefined, null, etc
      // an empty string won't harm.
      input = "";
    }

    if (!outputType) {
      return input;
    }

    exports.checkSupport(outputType);
    var inputType = exports.getTypeOf(input);
    var result = transform[inputType][outputType](input);
    return result;
  };
  /**
   * Return the type of the input.
   * The type will be in a format valid for JSZip.utils.transformTo : string, array, uint8array, arraybuffer.
   * @param {Object} input the input to identify.
   * @return {String} the (lowercase) type of the input.
   */


  exports.getTypeOf = function (input) {
    if (typeof input === "string") {
      return "string";
    }

    if (Object.prototype.toString.call(input) === "[object Array]") {
      return "array";
    }

    if (support.nodebuffer && nodejsUtils.isBuffer(input)) {
      return "nodebuffer";
    }

    if (support.uint8array && input instanceof Uint8Array) {
      return "uint8array";
    }

    if (support.arraybuffer && input instanceof ArrayBuffer) {
      return "arraybuffer";
    }
  };
  /**
   * Throw an exception if the type is not supported.
   * @param {String} type the type to check.
   * @throws {Error} an Error if the browser doesn't support the requested type.
   */


  exports.checkSupport = function (type) {
    var supported = support[type.toLowerCase()];

    if (!supported) {
      throw new Error(type + " is not supported by this platform");
    }
  };

  exports.MAX_VALUE_16BITS = 65535;
  exports.MAX_VALUE_32BITS = -1; // well, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF" is parsed as -1

  /**
   * Prettify a string read as binary.
   * @param {string} str the string to prettify.
   * @return {string} a pretty string.
   */

  exports.pretty = function (str) {
    var res = '',
        code,
        i;

    for (i = 0; i < (str || "").length; i++) {
      code = str.charCodeAt(i);
      res += '\\x' + (code < 16 ? "0" : "") + code.toString(16).toUpperCase();
    }

    return res;
  };
  /**
   * Defer the call of a function.
   * @param {Function} callback the function to call asynchronously.
   * @param {Array} args the arguments to give to the callback.
   */


  exports.delay = function (callback, args, self) {
    setImmediate(function () {
      callback.apply(self || null, args || []);
    });
  };
  /**
   * Extends a prototype with an other, without calling a constructor with
   * side effects. Inspired by nodejs' `utils.inherits`
   * @param {Function} ctor the constructor to augment
   * @param {Function} superCtor the parent constructor to use
   */


  exports.inherits = function (ctor, superCtor) {
    var Obj = function () {};

    Obj.prototype = superCtor.prototype;
    ctor.prototype = new Obj();
  };
  /**
   * Merge the objects passed as parameters into a new one.
   * @private
   * @param {...Object} var_args All objects to merge.
   * @return {Object} a new object with the data of the others.
   */


  exports.extend = function () {
    var result = {},
        i,
        attr;

    for (i = 0; i < arguments.length; i++) {
      // arguments is not enumerable in some browsers
      for (attr in arguments[i]) {
        if (arguments[i].hasOwnProperty(attr) && typeof result[attr] === "undefined") {
          result[attr] = arguments[i][attr];
        }
      }
    }

    return result;
  };
  /**
   * Transform arbitrary content into a Promise.
   * @param {String} name a name for the content being processed.
   * @param {Object} inputData the content to process.
   * @param {Boolean} isBinary true if the content is not an unicode string
   * @param {Boolean} isOptimizedBinaryString true if the string content only has one byte per character.
   * @param {Boolean} isBase64 true if the string content is encoded with base64.
   * @return {Promise} a promise in a format usable by JSZip.
   */


  exports.prepareContent = function (name, inputData, isBinary, isOptimizedBinaryString, isBase64) {
    // if inputData is already a promise, this flatten it.
    var promise = external.Promise.resolve(inputData).then(function (data) {
      var isBlob = support.blob && (data instanceof Blob || ['[object File]', '[object Blob]'].indexOf(Object.prototype.toString.call(data)) !== -1);

      if (isBlob && typeof FileReader !== "undefined") {
        return new external.Promise(function (resolve, reject) {
          var reader = new FileReader();

          reader.onload = function (e) {
            resolve(e.target.result);
          };

          reader.onerror = function (e) {
            reject(e.target.error);
          };

          reader.readAsArrayBuffer(data);
        });
      } else {
        return data;
      }
    });
    return promise.then(function (data) {
      var dataType = exports.getTypeOf(data);

      if (!dataType) {
        return external.Promise.reject(new Error("Can't read the data of '" + name + "'. Is it " + "in a supported JavaScript type (String, Blob, ArrayBuffer, etc) ?"));
      } // special case : it's way easier to work with Uint8Array than with ArrayBuffer


      if (dataType === "arraybuffer") {
        data = exports.transformTo("uint8array", data);
      } else if (dataType === "string") {
        if (isBase64) {
          data = base64.decode(data);
        } else if (isBinary) {
          // optimizedBinaryString === true means that the file has already been filtered with a 0xFF mask
          if (isOptimizedBinaryString !== true) {
            // this is a string, not in a base64 format.
            // Be sure that this is a correct "binary string"
            data = string2binary(data);
          }
        }
      }

      return data;
    });
  };

  return exports;
}