// Metro module 8 (f9).
let isArray;
const Deque = function Deque(a0) {
  let _capacity;
  L4: {
    let r14 = a0;
    if (typeof a0 !== "number") {
      const isArray2 = isArray(a0);
      _capacity = 16;
      if (!isArray2) {
        break L4;
      }
      r14 = a0.length;
    }
    const r3 = (Math.min(Math.max(16, r14), 1073741824) >>> 0) - 1;
    const r24 = r3 | r3 >> 1;
    const r27 = r24 | r24 >> 2;
    const r30 = r27 | r27 >> 4;
    const r33 = r30 | r30 >> 8;
    _capacity = 1 + (r33 | r33 >> 16);
  }
  this._capacity = _capacity;
  this._length = 0;
  this._front = 0;
  this._makeCapacity();
  if (isArray(a0)) {
    const length = a0.length;
    const r6 = 0 < length;
    let r44 = 0;
    if (r6) {
      do {
        this[r44] = a0[r44];
        r44 = r44 + 1;
      } while (r44 < length);
    }
    this._length = length;
  }
};
Deque.prototype.toArray = function Deque$toArray() {
  const _length = this._length;
  const array = new Array(_length);
  const _front = this._front;
  const _capacity = this._capacity;
  let r0 = 0;
  while (r0 < _length) {
    array[r0] = this[_front + r0 & _capacity - 1];
    r0 = r0 + 1;
  }
  return array;
};
Deque.prototype.push = function Deque$push(a0) {
  const length = arguments.length;
  const _length = this._length;
  if (length > 1) {
    const _capacity = this._capacity;
    if (_length + length > _capacity) {
      let r29 = 0;
      const r30 = 0 < length;
      let r31 = _length;
      let r32 = r31;
      if (r30) {
        do {
          this._checkCapacity(r31 + 1);
          this[this._front + r31 & this._capacity - 1] = arguments[r29];
          const _length2 = r31 + 1;
          this._length = _length2;
          r29 = r29 + 1;
          r31 = _length2;
          r32 = r31;
        } while (r29 < length);
      }
      return r32;
    }
    let _front = this._front;
    let r23 = 0;
    while (r23 < length) {
      this[_front + _length & _capacity - 1] = arguments[r23];
      _front = _front + 1;
      r23 = r23 + 1;
    }
    this._length = _length + length;
    return _length + length;
  }
  let r5 = _length;
  if (length !== 0) {
    this._checkCapacity(_length + 1);
    this[this._front + _length & this._capacity - 1] = a0;
    this._length = _length + 1;
    r5 = _length + 1;
  }
  return r5;
};
Deque.prototype.pop = function Deque$pop() {
  const _length = this._length;
  if (_length !== 0) {
    const r10 = this._front + _length - 1 & this._capacity - 1;
    const r11 = this[r10];
    this[r10] = void 0;
    this._length = _length - 1;
    return r11;
  }
};
Deque.prototype.shift = function Deque$shift() {
  const _length = this._length;
  if (_length !== 0) {
    const _front = this._front;
    const r3 = this[_front];
    this[_front] = void 0;
    this._front = _front + 1 & this._capacity - 1;
    this._length = _length - 1;
    return r3;
  }
};
Deque.prototype.unshift = function Deque$unshift(a0) {
  const _length = this._length;
  const length = arguments.length;
  if (length > 1) {
    const r24 = _length + length;
    const _capacity2 = this._capacity;
    if (r24 > _capacity2) {
      let r35 = length - 1;
      let r37 = _length;
      let r38 = r37;
      while (0 <= r35) {
        this._checkCapacity(r37 + 1);
        const _capacity3 = this._capacity;
        const _front4 = (this._front - 1 & _capacity3 - 1 ^ _capacity3) - _capacity3;
        this[_front4] = arguments[r35];
        const _length2 = r37 + 1;
        this._length = _length2;
        this._front = _front4;
        r35 = r35 - 1;
        r37 = _length2;
        r38 = r37;
      }
      return r38;
    }
    let _front = this._front;
    let r27 = length - 1;
    let _front3 = _front;
    while (0 <= r27) {
      const r32 = (_front - 1 & _capacity2 - 1 ^ _capacity2) - _capacity2;
      this[r32] = arguments[r27];
      r27 = r27 - 1;
      _front = r32;
      _front3 = _front;
    }
    this._front = _front3;
    this._length = _length + length;
    return _length + length;
  }
  if (length === 0) {
    return _length;
  }
  this._checkCapacity(_length + 1);
  const _capacity = this._capacity;
  const _front2 = (this._front - 1 & _capacity - 1 ^ _capacity) - _capacity;
  this[_front2] = a0;
  this._length = _length + 1;
  this._front = _front2;
  return _length + 1;
};
Deque.prototype.peekBack = function Deque$peekBack() {
  const _length = this._length;
  if (_length !== 0) {
    return this[this._front + _length - 1 & this._capacity - 1];
  }
};
Deque.prototype.peekFront = function Deque$peekFront() {
  if (this._length !== 0) {
    return this[this._front];
  }
};
Deque.prototype.get = function Deque$get(a0) {
  if (a0 === (a0 | 0)) {
    const _length = this._length;
    const r4 = a0 < 0 ? a0 + _length : a0;
    if (!(r4 < 0) && !(r4 >= _length)) {
      return this[this._front + r4 & this._capacity - 1];
    }
  }
};
Deque.prototype.isEmpty = function Deque$isEmpty() {
  return this._length === 0;
};
Deque.prototype.clear = function Deque$clear() {
  this._length = 0;
  this._front = 0;
  this._makeCapacity();
};
Deque.prototype.toString = function Deque$toString() {
  return this.toArray().toString();
};
Deque.prototype.valueOf = Deque.prototype.toString;
Deque.prototype.removeFront = Deque.prototype.shift;
Deque.prototype.removeBack = Deque.prototype.pop;
Deque.prototype.insertFront = Deque.prototype.unshift;
Deque.prototype.insertBack = Deque.prototype.push;
Deque.prototype.enqueue = Deque.prototype.push;
Deque.prototype.dequeue = Deque.prototype.shift;
Deque.prototype.toJSON = Deque.prototype.toArray;
Object.defineProperty(Deque.prototype, "length", {
  get: function get() {
    return this._length;
  },
  set: function set() {
    throw new RangeError("");
  }
});
Deque.prototype._makeCapacity = function Deque$_makeCapacity() {
  const _capacity = this._capacity;
  let r0 = 0;
  while (r0 < _capacity) {
    this[r0] = void 0;
    r0 = r0 + 1;
  }
};
Deque.prototype._checkCapacity = function Deque$_checkCapacity(a0) {
  let r19, _resizeTo;
  if (this._capacity < a0) {
    L5: {
      _resizeTo = this._resizeTo;
      const r2 = 1.5 * this._capacity + 16;
      let r12 = r2;
      if (typeof r12 !== "number") {
        const isArray2 = isArray(r2);
        r19 = 16;
        if (!isArray2) {
          break L5;
        }
        r12 = r2.length;
      }
      const r1 = (Math.min(Math.max(16, r12), 1073741824) >>> 0) - 1;
      const r28 = r1 | r1 >> 1;
      const r31 = r28 | r28 >> 2;
      const r34 = r31 | r31 >> 4;
      const r37 = r34 | r34 >> 8;
      r19 = 1 + (r37 | r37 >> 16);
    }
    _resizeTo.call(this, r19);
  }
};
Deque.prototype._resizeTo = function Deque$_resizeTo(a0) {
  const _front = this._front;
  const _capacity = this._capacity;
  const array = new Array(_capacity);
  const _length = this._length;
  const r6 = 0 < _capacity;
  let r0 = 0;
  if (r6) {
    do {
      const r3 = r0 + 0;
      array[r3] = this[r3];
      r0 = r0 + 1;
    } while (r0 < _capacity);
  }
  this._capacity = a0;
  this._makeCapacity();
  this._front = 0;
  if (_front + _length <= _capacity) {
    const r34 = 0 < _length;
    let r35 = 0;
    if (r34) {
      do {
        this[r35 + 0] = array[r35 + _front];
        r35 = r35 + 1;
      } while (r35 < _length);
    }
  } else {
    const r5 = _length - (_front + _length & _capacity - 1);
    let r26 = 0;
    while (r26 < r5) {
      this[r26 + 0] = array[r26 + _front];
      r26 = r26 + 1;
    }
    const r30 = _length - r5;
    let r31 = 0;
    while (r31 < r30) {
      this[r31 + r5] = array[r31 + 0];
      r31 = r31 + 1;
    }
  }
};
isArray = Array.isArray;
module.exports = Deque;