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Simplify bufferClone.

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jdalton
2015-05-26 11:26:48 -07:00
parent ae0bb54b2d
commit 98956056e3
1 changed files with 3 additions and 27 deletions
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30
lodash.src.js
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@@ -773,18 +773,6 @@
Uint8Array = getNative(context, 'Uint8Array'), Uint8Array = getNative(context, 'Uint8Array'),
WeakMap = getNative(context, 'WeakMap'); WeakMap = getNative(context, 'WeakMap');
/** Used to clone array buffers. */
var Float64Array = (function() {
// Safari 5 errors when using an array buffer to initialize a typed array
// where the array buffer's `byteLength` is not a multiple of the typed
// array's `BYTES_PER_ELEMENT`.
try {
var func = getNative(context, 'Float64Array'),
result = new func(new ArrayBuffer(10), 0, 1) && func;
} catch(e) {}
return result || null;
}());
/* Native method references for those with the same name as other `lodash` methods. */ /* Native method references for those with the same name as other `lodash` methods. */
var nativeCreate = getNative(Object, 'create'), var nativeCreate = getNative(Object, 'create'),
nativeIsArray = getNative(Array, 'isArray'), nativeIsArray = getNative(Array, 'isArray'),
@@ -806,9 +794,6 @@
MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1, MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1; HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
/** Used as the size, in bytes, of each `Float64Array` element. */
var FLOAT64_BYTES_PER_ELEMENT = Float64Array ? Float64Array.BYTES_PER_ELEMENT : 0;
/** /**
* Used as the [maximum length](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer) * Used as the [maximum length](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer)
* of an array-like value. * of an array-like value.
@@ -3030,19 +3015,10 @@
* @returns {ArrayBuffer} Returns the cloned array buffer. * @returns {ArrayBuffer} Returns the cloned array buffer.
*/ */
var bufferClone = !(ArrayBuffer && Uint8Array) ? constant(null) : function(buffer) { var bufferClone = !(ArrayBuffer && Uint8Array) ? constant(null) : function(buffer) {
var byteLength = buffer.byteLength, var result = new ArrayBuffer(buffer.byteLength),
floatLength = Float64Array ? floor(byteLength / FLOAT64_BYTES_PER_ELEMENT) : 0, view = new Uint8Array(result);
offset = floatLength * FLOAT64_BYTES_PER_ELEMENT,
result = new ArrayBuffer(byteLength);
if (floatLength) { view.set(new Uint8Array(buffer));
var view = new Float64Array(result, 0, floatLength);
view.set(new Float64Array(buffer, 0, floatLength));
}
if (byteLength != offset) {
view = new Uint8Array(result, offset);
view.set(new Uint8Array(buffer, offset));
}
return result; return result;
}; };