kc3-lang/brotli/js/polyfill.js

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• Hash : 630b5084
  Author :
  Date : 2021-07-29T22:29:43
  

  Update (#914)
  
   * slimmer stack frames in encoder
   * fix MSAN problem in hasher_composite
     (not dangerous, only in large_window mode)
   * fix JNI decoder wrapper - power-of-two payloads fail to decode sometimes
   * reformat polyfil.js and decode_test.js
  

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• js/polyfill.js

• if (!Int32Array.__proto__.from) {
    Object.defineProperty(Int32Array.__proto__, 'from', {
      value: function(obj) {
        obj = Object(obj);
        if (!obj['length']) {
          return new this(0);
        }
        let typed_array = new this(obj.length);
        for (let i = 0; i < typed_array.length; i++) {
          typed_array[i] = obj[i];
        }
        return typed_array;
      }
    });
  }
  
  if (!Array.prototype.copyWithin) {
    Array.prototype.copyWithin = function(target, start, end) {
      let O = Object(this);
      let len = O.length >>> 0;
      let to = target | 0;
      let from = start | 0;
      let count = Math.min(Math.min(end | 0, len) - from, len - to);
      let direction = 1;
      if (from < to && to < (from + count)) {
        direction = -1;
        from += count - 1;
        to += count - 1;
      }
      while (count > 0) {
        O[to] = O[from];
        from += direction;
        to += direction;
        count--;
      }
      return O;
    };
  }
  
  if (!Array.prototype.fill) {
    Object.defineProperty(Array.prototype, 'fill', {
      value: function(value, start, end) {
        end = end | 0;
        let O = Object(this);
        let k = start | 0;
        while (k < end) {
          O[k] = value;
          k++;
        }
        return O;
      }
    });
  }
  
  if (!Int8Array.prototype.copyWithin) {
    Int8Array.prototype.copyWithin = Array.prototype.copyWithin;
  }
  
  if (!Int8Array.prototype.fill) {
    Int8Array.prototype.fill = Array.prototype.fill;
  }
  
  if (!Int32Array.prototype.fill) {
    Int32Array.prototype.fill = Array.prototype.fill;
  }
  
  if (!Int8Array.prototype.slice) {
    Object.defineProperty(Int8Array.prototype, 'slice', {
      value: function(begin, end) {
        return new Int8Array(Array.prototype.slice.call(this, begin, end));
      }
    });
  }
  

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