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'use strict';
var global = require('./_global');
var DESCRIPTORS = require('./_descriptors');
var LIBRARY = require('./_library');
var $typed = require('./_typed');
var hide = require('./_hide');
var redefineAll = require('./_redefine-all');
var fails = require('./_fails');
var anInstance = require('./_an-instance');
var toInteger = require('./_to-integer');
var toLength = require('./_to-length');
var toIndex = require('./_to-index');
var gOPN = require('./_object-gopn').f;
var dP = require('./_object-dp').f;
var arrayFill = require('./_array-fill');
var setToStringTag = require('./_set-to-string-tag');
var ARRAY_BUFFER = 'ArrayBuffer';
var DATA_VIEW = 'DataView';
var PROTOTYPE = 'prototype';
var WRONG_LENGTH = 'Wrong length!';
var WRONG_INDEX = 'Wrong index!';
var $ArrayBuffer = global[ARRAY_BUFFER];
var $DataView = global[DATA_VIEW];
var Math = global.Math;
var RangeError = global.RangeError;
// eslint-disable-next-line no-shadow-restricted-names
var Infinity = global.Infinity;
var BaseBuffer = $ArrayBuffer;
var abs = Math.abs;
var pow = Math.pow;
var floor = Math.floor;
var log = Math.log;
var LN2 = Math.LN2;
var BUFFER = 'buffer';
var BYTE_LENGTH = 'byteLength';
var BYTE_OFFSET = 'byteOffset';
var $BUFFER = DESCRIPTORS ? '_b' : BUFFER;
var $LENGTH = DESCRIPTORS ? '_l' : BYTE_LENGTH;
var $OFFSET = DESCRIPTORS ? '_o' : BYTE_OFFSET;
// IEEE754 conversions based on https://github.com/feross/ieee754
function packIEEE754(value, mLen, nBytes) {
var buffer = new Array(nBytes);
var eLen = nBytes * 8 - mLen - 1;
var eMax = (1 << eLen) - 1;
var eBias = eMax >> 1;
var rt = mLen === 23 ? pow(2, -24) - pow(2, -77) : 0;
var i = 0;
var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
var e, m, c;
value = abs(value);
// eslint-disable-next-line no-self-compare
if (value != value || value === Infinity) {
// eslint-disable-next-line no-self-compare
m = value != value ? 1 : 0;
e = eMax;
} else {
e = floor(log(value) / LN2);
if (value * (c = pow(2, -e)) < 1) {
e--;
c *= 2;
}
if (e + eBias >= 1) {
value += rt / c;
} else {
value += rt * pow(2, 1 - eBias);
}
if (value * c >= 2) {
e++;
c /= 2;
}
if (e + eBias >= eMax) {
m = 0;
e = eMax;
} else if (e + eBias >= 1) {
m = (value * c - 1) * pow(2, mLen);
e = e + eBias;
} else {
m = value * pow(2, eBias - 1) * pow(2, mLen);
e = 0;
}
}
for (; mLen >= 8; buffer[i++] = m & 255, m /= 256, mLen -= 8);
e = e << mLen | m;
eLen += mLen;
for (; eLen > 0; buffer[i++] = e & 255, e /= 256, eLen -= 8);
buffer[--i] |= s * 128;
return buffer;
}
function unpackIEEE754(buffer, mLen, nBytes) {
var eLen = nBytes * 8 - mLen - 1;
var eMax = (1 << eLen) - 1;
var eBias = eMax >> 1;
var nBits = eLen - 7;
var i = nBytes - 1;
var s = buffer[i--];
var e = s & 127;
var m;
s >>= 7;
for (; nBits > 0; e = e * 256 + buffer[i], i--, nBits -= 8);
m = e & (1 << -nBits) - 1;
e >>= -nBits;
nBits += mLen;
for (; nBits > 0; m = m * 256 + buffer[i], i--, nBits -= 8);
if (e === 0) {
e = 1 - eBias;
} else if (e === eMax) {
return m ? NaN : s ? -Infinity : Infinity;
} else {
m = m + pow(2, mLen);
e = e - eBias;
} return (s ? -1 : 1) * m * pow(2, e - mLen);
}
function unpackI32(bytes) {
return bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0];
}
function packI8(it) {
return [it & 0xff];
}
function packI16(it) {
return [it & 0xff, it >> 8 & 0xff];
}
function packI32(it) {
return [it & 0xff, it >> 8 & 0xff, it >> 16 & 0xff, it >> 24 & 0xff];
}
function packF64(it) {
return packIEEE754(it, 52, 8);
}
function packF32(it) {
return packIEEE754(it, 23, 4);
}
function addGetter(C, key, internal) {
dP(C[PROTOTYPE], key, { get: function () { return this[internal]; } });
}
function get(view, bytes, index, isLittleEndian) {
var numIndex = +index;
var intIndex = toIndex(numIndex);
if (intIndex + bytes > view[$LENGTH]) throw RangeError(WRONG_INDEX);
var store = view[$BUFFER]._b;
var start = intIndex + view[$OFFSET];
var pack = store.slice(start, start + bytes);
return isLittleEndian ? pack : pack.reverse();
}
function set(view, bytes, index, conversion, value, isLittleEndian) {
var numIndex = +index;
var intIndex = toIndex(numIndex);
if (intIndex + bytes > view[$LENGTH]) throw RangeError(WRONG_INDEX);
var store = view[$BUFFER]._b;
var start = intIndex + view[$OFFSET];
var pack = conversion(+value);
for (var i = 0; i < bytes; i++) store[start + i] = pack[isLittleEndian ? i : bytes - i - 1];
}
if (!$typed.ABV) {
$ArrayBuffer = function ArrayBuffer(length) {
anInstance(this, $ArrayBuffer, ARRAY_BUFFER);
var byteLength = toIndex(length);
this._b = arrayFill.call(new Array(byteLength), 0);
this[$LENGTH] = byteLength;
};
$DataView = function DataView(buffer, byteOffset, byteLength) {
anInstance(this, $DataView, DATA_VIEW);
anInstance(buffer, $ArrayBuffer, DATA_VIEW);
var bufferLength = buffer[$LENGTH];
var offset = toInteger(byteOffset);
if (offset < 0 || offset > bufferLength) throw RangeError('Wrong offset!');
byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);
if (offset + byteLength > bufferLength) throw RangeError(WRONG_LENGTH);
this[$BUFFER] = buffer;
this[$OFFSET] = offset;
this[$LENGTH] = byteLength;
};
if (DESCRIPTORS) {
addGetter($ArrayBuffer, BYTE_LENGTH, '_l');
addGetter($DataView, BUFFER, '_b');
addGetter($DataView, BYTE_LENGTH, '_l');
addGetter($DataView, BYTE_OFFSET, '_o');
}
redefineAll($DataView[PROTOTYPE], {
getInt8: function getInt8(byteOffset) {
return get(this, 1, byteOffset)[0] << 24 >> 24;
},
getUint8: function getUint8(byteOffset) {
return get(this, 1, byteOffset)[0];
},
getInt16: function getInt16(byteOffset /* , littleEndian */) {
var bytes = get(this, 2, byteOffset, arguments[1]);
return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
},
getUint16: function getUint16(byteOffset /* , littleEndian */) {
var bytes = get(this, 2, byteOffset, arguments[1]);
return bytes[1] << 8 | bytes[0];
},
getInt32: function getInt32(byteOffset /* , littleEndian */) {
return unpackI32(get(this, 4, byteOffset, arguments[1]));
},
getUint32: function getUint32(byteOffset /* , littleEndian */) {
return unpackI32(get(this, 4, byteOffset, arguments[1])) >>> 0;
},
getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
return unpackIEEE754(get(this, 4, byteOffset, arguments[1]), 23, 4);
},
getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
return unpackIEEE754(get(this, 8, byteOffset, arguments[1]), 52, 8);
},
setInt8: function setInt8(byteOffset, value) {
set(this, 1, byteOffset, packI8, value);
},
setUint8: function setUint8(byteOffset, value) {
set(this, 1, byteOffset, packI8, value);
},
setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
set(this, 2, byteOffset, packI16, value, arguments[2]);
},
setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
set(this, 2, byteOffset, packI16, value, arguments[2]);
},
setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
set(this, 4, byteOffset, packI32, value, arguments[2]);
},
setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
set(this, 4, byteOffset, packI32, value, arguments[2]);
},
setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
set(this, 4, byteOffset, packF32, value, arguments[2]);
},
setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
set(this, 8, byteOffset, packF64, value, arguments[2]);
}
});
} else {
if (!fails(function () {
$ArrayBuffer(1);
}) || !fails(function () {
new $ArrayBuffer(-1); // eslint-disable-line no-new
}) || fails(function () {
new $ArrayBuffer(); // eslint-disable-line no-new
new $ArrayBuffer(1.5); // eslint-disable-line no-new
new $ArrayBuffer(NaN); // eslint-disable-line no-new
return $ArrayBuffer.name != ARRAY_BUFFER;
})) {
$ArrayBuffer = function ArrayBuffer(length) {
anInstance(this, $ArrayBuffer);
return new BaseBuffer(toIndex(length));
};
var ArrayBufferProto = $ArrayBuffer[PROTOTYPE] = BaseBuffer[PROTOTYPE];
for (var keys = gOPN(BaseBuffer), j = 0, key; keys.length > j;) {
if (!((key = keys[j++]) in $ArrayBuffer)) hide($ArrayBuffer, key, BaseBuffer[key]);
}
if (!LIBRARY) ArrayBufferProto.constructor = $ArrayBuffer;
}
// iOS Safari 7.x bug
var view = new $DataView(new $ArrayBuffer(2));
var $setInt8 = $DataView[PROTOTYPE].setInt8;
view.setInt8(0, 2147483648);
view.setInt8(1, 2147483649);
if (view.getInt8(0) || !view.getInt8(1)) redefineAll($DataView[PROTOTYPE], {
setInt8: function setInt8(byteOffset, value) {
$setInt8.call(this, byteOffset, value << 24 >> 24);
},
setUint8: function setUint8(byteOffset, value) {
$setInt8.call(this, byteOffset, value << 24 >> 24);
}
}, true);
}
setToStringTag($ArrayBuffer, ARRAY_BUFFER);
setToStringTag($DataView, DATA_VIEW);
hide($DataView[PROTOTYPE], $typed.VIEW, true);
exports[ARRAY_BUFFER] = $ArrayBuffer;
exports[DATA_VIEW] = $DataView;
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