mirror of
https://github.com/idanoo/GoScrobble.git
synced 2024-11-25 09:55:15 +00:00
229 lines
8.9 KiB
JavaScript
229 lines
8.9 KiB
JavaScript
'use strict';
|
|
var global = require('../internals/global');
|
|
var DESCRIPTORS = require('../internals/descriptors');
|
|
var NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native');
|
|
var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
|
|
var redefineAll = require('../internals/redefine-all');
|
|
var fails = require('../internals/fails');
|
|
var anInstance = require('../internals/an-instance');
|
|
var toInteger = require('../internals/to-integer');
|
|
var toLength = require('../internals/to-length');
|
|
var toIndex = require('../internals/to-index');
|
|
var IEEE754 = require('../internals/ieee754');
|
|
var getPrototypeOf = require('../internals/object-get-prototype-of');
|
|
var setPrototypeOf = require('../internals/object-set-prototype-of');
|
|
var getOwnPropertyNames = require('../internals/object-get-own-property-names').f;
|
|
var defineProperty = require('../internals/object-define-property').f;
|
|
var arrayFill = require('../internals/array-fill');
|
|
var setToStringTag = require('../internals/set-to-string-tag');
|
|
var InternalStateModule = require('../internals/internal-state');
|
|
|
|
var getInternalState = InternalStateModule.get;
|
|
var setInternalState = InternalStateModule.set;
|
|
var ARRAY_BUFFER = 'ArrayBuffer';
|
|
var DATA_VIEW = 'DataView';
|
|
var PROTOTYPE = 'prototype';
|
|
var WRONG_LENGTH = 'Wrong length';
|
|
var WRONG_INDEX = 'Wrong index';
|
|
var NativeArrayBuffer = global[ARRAY_BUFFER];
|
|
var $ArrayBuffer = NativeArrayBuffer;
|
|
var $DataView = global[DATA_VIEW];
|
|
var $DataViewPrototype = $DataView && $DataView[PROTOTYPE];
|
|
var ObjectPrototype = Object.prototype;
|
|
var RangeError = global.RangeError;
|
|
|
|
var packIEEE754 = IEEE754.pack;
|
|
var unpackIEEE754 = IEEE754.unpack;
|
|
|
|
var packInt8 = function (number) {
|
|
return [number & 0xFF];
|
|
};
|
|
|
|
var packInt16 = function (number) {
|
|
return [number & 0xFF, number >> 8 & 0xFF];
|
|
};
|
|
|
|
var packInt32 = function (number) {
|
|
return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
|
|
};
|
|
|
|
var unpackInt32 = function (buffer) {
|
|
return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
|
|
};
|
|
|
|
var packFloat32 = function (number) {
|
|
return packIEEE754(number, 23, 4);
|
|
};
|
|
|
|
var packFloat64 = function (number) {
|
|
return packIEEE754(number, 52, 8);
|
|
};
|
|
|
|
var addGetter = function (Constructor, key) {
|
|
defineProperty(Constructor[PROTOTYPE], key, { get: function () { return getInternalState(this)[key]; } });
|
|
};
|
|
|
|
var get = function (view, count, index, isLittleEndian) {
|
|
var intIndex = toIndex(index);
|
|
var store = getInternalState(view);
|
|
if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX);
|
|
var bytes = getInternalState(store.buffer).bytes;
|
|
var start = intIndex + store.byteOffset;
|
|
var pack = bytes.slice(start, start + count);
|
|
return isLittleEndian ? pack : pack.reverse();
|
|
};
|
|
|
|
var set = function (view, count, index, conversion, value, isLittleEndian) {
|
|
var intIndex = toIndex(index);
|
|
var store = getInternalState(view);
|
|
if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX);
|
|
var bytes = getInternalState(store.buffer).bytes;
|
|
var start = intIndex + store.byteOffset;
|
|
var pack = conversion(+value);
|
|
for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];
|
|
};
|
|
|
|
if (!NATIVE_ARRAY_BUFFER) {
|
|
$ArrayBuffer = function ArrayBuffer(length) {
|
|
anInstance(this, $ArrayBuffer, ARRAY_BUFFER);
|
|
var byteLength = toIndex(length);
|
|
setInternalState(this, {
|
|
bytes: arrayFill.call(new Array(byteLength), 0),
|
|
byteLength: byteLength
|
|
});
|
|
if (!DESCRIPTORS) this.byteLength = byteLength;
|
|
};
|
|
|
|
$DataView = function DataView(buffer, byteOffset, byteLength) {
|
|
anInstance(this, $DataView, DATA_VIEW);
|
|
anInstance(buffer, $ArrayBuffer, DATA_VIEW);
|
|
var bufferLength = getInternalState(buffer).byteLength;
|
|
var offset = toInteger(byteOffset);
|
|
if (offset < 0 || offset > bufferLength) throw RangeError('Wrong offset');
|
|
byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);
|
|
if (offset + byteLength > bufferLength) throw RangeError(WRONG_LENGTH);
|
|
setInternalState(this, {
|
|
buffer: buffer,
|
|
byteLength: byteLength,
|
|
byteOffset: offset
|
|
});
|
|
if (!DESCRIPTORS) {
|
|
this.buffer = buffer;
|
|
this.byteLength = byteLength;
|
|
this.byteOffset = offset;
|
|
}
|
|
};
|
|
|
|
if (DESCRIPTORS) {
|
|
addGetter($ArrayBuffer, 'byteLength');
|
|
addGetter($DataView, 'buffer');
|
|
addGetter($DataView, 'byteLength');
|
|
addGetter($DataView, 'byteOffset');
|
|
}
|
|
|
|
redefineAll($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.length > 1 ? arguments[1] : undefined);
|
|
return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
|
|
},
|
|
getUint16: function getUint16(byteOffset /* , littleEndian */) {
|
|
var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
|
|
return bytes[1] << 8 | bytes[0];
|
|
},
|
|
getInt32: function getInt32(byteOffset /* , littleEndian */) {
|
|
return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
|
|
},
|
|
getUint32: function getUint32(byteOffset /* , littleEndian */) {
|
|
return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
|
|
},
|
|
getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
|
|
return unpackIEEE754(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
|
|
},
|
|
getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
|
|
return unpackIEEE754(get(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
|
|
},
|
|
setInt8: function setInt8(byteOffset, value) {
|
|
set(this, 1, byteOffset, packInt8, value);
|
|
},
|
|
setUint8: function setUint8(byteOffset, value) {
|
|
set(this, 1, byteOffset, packInt8, value);
|
|
},
|
|
setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
|
|
set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
|
|
},
|
|
setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
|
|
set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
|
|
},
|
|
setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
|
|
set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
|
|
},
|
|
setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
|
|
set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
|
|
},
|
|
setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
|
|
set(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
|
|
},
|
|
setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
|
|
set(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
|
|
}
|
|
});
|
|
} else {
|
|
/* eslint-disable no-new -- required for testing */
|
|
if (!fails(function () {
|
|
NativeArrayBuffer(1);
|
|
}) || !fails(function () {
|
|
new NativeArrayBuffer(-1);
|
|
}) || fails(function () {
|
|
new NativeArrayBuffer();
|
|
new NativeArrayBuffer(1.5);
|
|
new NativeArrayBuffer(NaN);
|
|
return NativeArrayBuffer.name != ARRAY_BUFFER;
|
|
})) {
|
|
/* eslint-enable no-new -- required for testing */
|
|
$ArrayBuffer = function ArrayBuffer(length) {
|
|
anInstance(this, $ArrayBuffer);
|
|
return new NativeArrayBuffer(toIndex(length));
|
|
};
|
|
var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE] = NativeArrayBuffer[PROTOTYPE];
|
|
for (var keys = getOwnPropertyNames(NativeArrayBuffer), j = 0, key; keys.length > j;) {
|
|
if (!((key = keys[j++]) in $ArrayBuffer)) {
|
|
createNonEnumerableProperty($ArrayBuffer, key, NativeArrayBuffer[key]);
|
|
}
|
|
}
|
|
ArrayBufferPrototype.constructor = $ArrayBuffer;
|
|
}
|
|
|
|
// WebKit bug - the same parent prototype for typed arrays and data view
|
|
if (setPrototypeOf && getPrototypeOf($DataViewPrototype) !== ObjectPrototype) {
|
|
setPrototypeOf($DataViewPrototype, ObjectPrototype);
|
|
}
|
|
|
|
// iOS Safari 7.x bug
|
|
var testView = new $DataView(new $ArrayBuffer(2));
|
|
var $setInt8 = $DataViewPrototype.setInt8;
|
|
testView.setInt8(0, 2147483648);
|
|
testView.setInt8(1, 2147483649);
|
|
if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll($DataViewPrototype, {
|
|
setInt8: function setInt8(byteOffset, value) {
|
|
$setInt8.call(this, byteOffset, value << 24 >> 24);
|
|
},
|
|
setUint8: function setUint8(byteOffset, value) {
|
|
$setInt8.call(this, byteOffset, value << 24 >> 24);
|
|
}
|
|
}, { unsafe: true });
|
|
}
|
|
|
|
setToStringTag($ArrayBuffer, ARRAY_BUFFER);
|
|
setToStringTag($DataView, DATA_VIEW);
|
|
|
|
module.exports = {
|
|
ArrayBuffer: $ArrayBuffer,
|
|
DataView: $DataView
|
|
};
|