/** @module std/portable *//***/

var globalScope = typeof window !== "undefined" && window || typeof global !== "undefined" && global || self;

globalScope.ASC_TARGET = 0; // Target.JS
globalScope.ASC_NO_ASSERT = false;
globalScope.ASC_MEMORY_BASE = 0;
globalScope.ASC_OPTIMIZE_LEVEL = 3;
globalScope.ASC_SHRINK_LEVEL = 0;
globalScope.ASC_FEATURE_MUTABLE_GLOBAL = false;
globalScope.ASC_FEATURE_SIGN_EXTENSION = false;
globalScope.ASC_FEATURE_BULK_MEMORY = false;
globalScope.ASC_FEATURE_SIMD = false;
globalScope.ASC_FEATURE_THREADS = false;

var F64 = new Float64Array(1);
var U64 = new Uint32Array(F64.buffer);

Object.defineProperties(
  globalScope["i8"] = function i8(value) { return value << 24 >> 24; },
  {
    "MIN_VALUE": { value: -128, writable: false },
    "MAX_VALUE": { value:  127, writable: false }
  }
);

Object.defineProperties(
  globalScope["i16"] = function i16(value) { return value << 16 >> 16; },
  {
    "MIN_VALUE": { value: -32768, writable: false },
    "MAX_VALUE": { value:  32767, writable: false }
  }
);

Object.defineProperties(
  globalScope["i32"] = globalScope["isize"] = function i32(value) { return value | 0; },
  {
    "MIN_VALUE": { value: -2147483648, writable: false },
    "MAX_VALUE": { value:  2147483647, writable: false }
  }
);

Object.defineProperties(
  globalScope["u8"] = function u8(value) { return value & 0xff; },
  {
    "MIN_VALUE": { value:   0, writable: false },
    "MAX_VALUE": { value: 255, writable: false }
  }
);

Object.defineProperties(
  globalScope["u16"] = function u16(value) { return value & 0xffff; },
  {
    "MIN_VALUE": { value:     0, writable: false },
    "MAX_VALUE": { value: 65535, writable: false }
  }
);

Object.defineProperties(
  globalScope["u32"] = globalScope["usize"] = function u32(value) { return value >>> 0; },
  {
    "MIN_VALUE": { value:          0, writable: false },
    "MAX_VALUE": { value: 4294967295, writable: false }
  }
);

Object.defineProperties(
  globalScope["bool"] = function bool(value) { return !!value; },
  {
    "MIN_VALUE": { value: false, writable: false },
    "MAX_VALUE": { value: true,  writable: false }
  }
);

Object.defineProperties(
  globalScope["f32"] = function f32(value) { return Math.fround(value); },
  {
    "EPSILON":   { value: 1.1920928955078125e-07, writable: false },
    "MIN_VALUE": { value: 1.4012984643248170e-45, writable: false },
    "MAX_VALUE": { value: 3.4028234663852886e+38, writable: false },
    "MIN_NORMAL_VALUE":  { value:  1.1754943508222875e-38, writable: false },
    "MIN_SAFE_INTEGER":  { value: -16777215, writable: false },
    "MAX_SAFE_INTEGER":  { value:  16777215, writable: false },
    "POSITIVE_INFINITY": { value:  Infinity, writable: false },
    "NEGATIVE_INFINITY": { value: -Infinity, writable: false },
    "NaN": { value: NaN, writable: false }
  }
);

Object.defineProperties(
  globalScope["f64"] = function f64(value) { return +value; },
  {
    "EPSILON":   { value: 2.2204460492503131e-016, writable: false },
    "MIN_VALUE": { value:                  5e-324, writable: false },
    "MAX_VALUE": { value: 1.7976931348623157e+308, writable: false },
    "MIN_NORMAL_VALUE":  { value:  2.2250738585072014e-308, writable: false },
    "MIN_SAFE_INTEGER":  { value: -9007199254740991, writable: false },
    "MAX_SAFE_INTEGER":  { value:  9007199254740991, writable: false },
    "POSITIVE_INFINITY": { value:  Infinity, writable: false },
    "NEGATIVE_INFINITY": { value: -Infinity, writable: false },
    "NaN": { value: NaN, writable: false }
  }
);

globalScope["clz"] = Math.clz32;

globalScope["ctz"] = function ctz(value) {
  var c = Math.clz32(value & -value);
  return value ? 31 - c : c;
};

globalScope["popcnt"] = function popcnt(value) {
  value -= value >>> 1 & 0x55555555;
  value = (value & 0x33333333) + (value >>> 2 & 0x33333333);
  return (((value + (value >>> 4)) & 0x0F0F0F0F) * 0x01010101) >>> 24;
};

globalScope["rotl"] = function rotl(value, shift) {
  shift &= 31;
  return (value << shift) | (value >>> (32 - shift));
};

globalScope["rotr"] = function rotr(value, shift) {
  shift &= 31;
  return (value >>> shift) | (value << (32 - shift));
};

globalScope["abs"] = Math.abs;

globalScope["max"] = Math.max;

globalScope["min"] = Math.min;

globalScope["ceil"] = Math.ceil;

globalScope["floor"] = Math.floor;

// Adopt code from https://github.com/rfk/wasm-polyfill
globalScope["nearest"] = function nearest(value) {
  if (Math.abs(value - Math.trunc(value)) === 0.5) {
    return 2.0 * Math.round(value * 0.5);
  }
  return Math.round(value);
};

globalScope["select"] = function select(ifTrue, ifFalse, condition) {
  return condition ? ifTrue : ifFalse;
};

globalScope["sqrt"] = Math.sqrt;

globalScope["trunc"] = Math.trunc;

globalScope["copysign"] = function copysign(x, y) {
  return Math.abs(x) * Math.sign(y);
};

globalScope["bswap"] = function bswap(value) {
  var a = value >> 8 & 0x00FF00FF;
  var b = (value & 0x00FF00FF) << 8;
  value = a | b;
  a = value >> 16 & 0x0000FFFF;
  b = (value & 0x0000FFFF) << 16;
  return a | b;
};

globalScope["bswap16"] = function bswap16(value) {
  return ((value << 8) & 0xFF00) | ((value >> 8) & 0x00FF) | (value & 0xFFFF0000);
};

function UnreachableError() {
  if (Error.captureStackTrace) {
    Error.captureStackTrace(this, UnreachableError);
  } else {
    this.stack = this.name + ": " + this.message + "\n" + new Error().stack;
  }
}
UnreachableError.prototype = Object.create(Error.prototype);
UnreachableError.prototype.name = "UnreachableError";
UnreachableError.prototype.message = "unreachable";

globalScope["unreachable"] = function unreachable() {
  throw new UnreachableError();
};

function AssertionError(message) {
  this.message = message || "assertion failed";
  if (Error.captureStackTrace) {
    Error.captureStackTrace(this, AssertionError);
  } else {
    this.stack = this.name + ": " + this.message + "\n" + new Error().stack;
  }
}
AssertionError.prototype = Object.create(Error.prototype);
AssertionError.prototype.name = "AssertionError";

globalScope["assert"] = function assert(isTrueish, message) {
  if (isTrueish) return isTrueish;
  throw new AssertionError(message);
};

globalScope["changetype"] = function changetype(value) {
  return value;
};

String["fromCharCodes"] = function fromCharCodes(arr) {
  const CHUNKSIZE = 1 << 13;
  const len = arr.length;
  if (len <= CHUNKSIZE) {
    return String.fromCharCode.apply(String, arr);
  }
  let index = 0;
  let parts = '';
  while (index < len) {
    parts += String.fromCharCode.apply(
      String,
      arr.slice(index, Math.min(index + CHUNKSIZE, len))
    );
    index += CHUNKSIZE;
  }
  return parts;
};

String["fromCodePoints"] = function fromCodePoints(arr) {
  const CHUNKSIZE = 1 << 13;
  const len = arr.length;
  if (len <= CHUNKSIZE) {
    return String.fromCodePoint.apply(String, arr);
  }
  let index = 0;
  let parts = '';
  while (index < len) {
    parts += String.fromCodePoint.apply(
      String,
      arr.slice(index, Math.min(index + CHUNKSIZE, len))
    );
    index += CHUNKSIZE;
  }
  return parts;
};

if (!String.prototype.at) {
  Object.defineProperty(String.prototype, "at", {
    value: function at(index) {
      return this.charAt(index >= 0 ? index : index + this.length);
    },
    configurable: true
  });
}

if (!String.prototype.replaceAll) {
  Object.defineProperty(String.prototype, "replaceAll", {
    value: function replaceAll(search, replacment) {
      var res = this.split(search).join(replacment);
      if (!search.length) res = replacment + res + replacment;
      return res;
    },
    configurable: true
  });
}

function defaultComparator(a, b) {
  if (a === b) {
    if (a !== 0) return 0;
    a = 1 / a, b = 1 / b;
  } else {
    var nanA = a != a, nanB = b != b;
    if (nanA | nanB) return nanA - nanB;
    if (a == null) a = String(a);
    if (b == null) b = String(b);
  }
  return a > b ? 1 : -1;
}

const arraySort = Array.prototype.sort;
Array.prototype.sort = function sort(comparator) {
  return arraySort.call(this, comparator || defaultComparator);
};

[ Array,
  Uint8ClampedArray,
  Uint8Array, Int8Array,
  Uint16Array, Int16Array,
  Uint32Array, Int32Array,
  Float32Array, Float64Array
].forEach(Ctr => {
  if (!Ctr.prototype.at) {
    Object.defineProperty(Ctr.prototype, "at", {
      value: function at(index) {
        return this[index >= 0 ? index : index + this.length];
      },
      configurable: true
    });
  }

  if (!Ctr.prototype.findLastIndex) {
    Object.defineProperty(Ctr.prototype, "findLastIndex", {
      value: function findLastIndex(fn) {
        for (let i = this.length - 1; i >= 0; --i) {
          if (fn(this[i], i, this)) return i;
        }
        return -1;
      },
      configurable: true
    });
  }
});

globalScope["isInteger"] = Number.isInteger;

globalScope["isFloat"] = function isFloat(arg) {
  return typeof arg === "number";
};

globalScope["isNullable"] = function isNullable(arg) {
  return true;
};

globalScope["isReference"] = function isReference(arg) {
  return typeof arg === "object" || typeof arg === "string";
};

globalScope["isFunction"] = function isFunction(arg) {
  return typeof arg === "function";
};

globalScope["isString"] = function isString(arg) {
  return typeof arg === "string" || arg instanceof String;
};

globalScope["isArray"] = Array.isArray;
globalScope["isArrayLike"] = function isArrayLike(expr) {
  return expr
    && typeof expr === 'object'
    && typeof expr.length === 'number'
    && expr.length >= 0
    && Math.trunc(expr.length) === expr.length;
};

globalScope["isDefined"] = function isDefined(expr) {
  return typeof expr !== "undefined";
};

globalScope["isConstant"] = function isConstant(expr) {
  return false;
};

globalScope["unchecked"] = function unchecked(expr) {
  return expr;
};

globalScope["fmod"] = function fmod(x, y) {
  return x % y;
};

globalScope["fmodf"] = function fmodf(x, y) {
  return Math.fround(x % y);
};

globalScope["JSMath"] = Math;

Object.defineProperties(globalScope["JSMath"], {
  sincos_sin: { value: 0.0, writable: true },
  sincos_cos: { value: 0.0, writable: true },
  signbit: {
    value: function signbit(x) {
      F64[0] = x; return Boolean(U64[1] >>> 31);
    }
  },
  sincos: {
    value: function sincos(x) {
      this.sincos_sin = Math.sin(x);
      this.sincos_cos = Math.cos(x);
    }
  },
  exp2: {
    value: function exp2(x) {
      return Math.pow(2, x);
    }
  }
});

globalScope["unmanaged"] = function() { /* nop */ };

globalScope["trace"] = function(message, n) {
  if (n) message += Array.prototype.slice.call(arguments, 2, 2 + n);
  console.error("trace: " + message);
};

Object.defineProperty(Int8Array, "wrap", {
  value: function wrap(buffer, byteOffset, length) {
    return new Int8Array(buffer, byteOffset, length);
  }
});

Object.defineProperty(Uint8Array, "wrap", {
  value: function wrap(buffer, byteOffset, length) {
    return new Uint8Array(buffer, byteOffset, length);
  }
});

Object.defineProperty(Uint8ClampedArray, "wrap", {
  value: function wrap(buffer, byteOffset, length) {
    return new Uint8ClampedArray(buffer, byteOffset, length);
  }
});

Object.defineProperty(Int16Array, "wrap", {
  value: function wrap(buffer, byteOffset, length) {
    return new Int16Array(buffer, byteOffset, length);
  }
});

Object.defineProperty(Uint16Array, "wrap", {
  value: function wrap(buffer, byteOffset, length) {
    return new Uint16Array(buffer, byteOffset, length);
  }
});

Object.defineProperty(Int32Array, "wrap", {
  value: function wrap(buffer, byteOffset, length) {
    return new Int32Array(buffer, byteOffset, length);
  }
});

Object.defineProperty(Uint32Array, "wrap", {
  value: function wrap(buffer, byteOffset, length) {
    return new Uint32Array(buffer, byteOffset, length);
  }
});

Object.defineProperty(Float32Array, "wrap", {
  value: function wrap(buffer, byteOffset, length) {
    return new Float32Array(buffer, byteOffset, length);
  }
});

Object.defineProperty(Float64Array, "wrap", {
  value: function wrap(buffer, byteOffset, length) {
    return new Float64Array(buffer, byteOffset, length);
  }
});