mirror of https://github.com/lukechilds/node.git
Browse Source
- create a typed array from a node::Buffer object - update TypedArray::set() to spec - add TypedArray::get() methodv0.7.4-release
Mikael Bourges-Sevenier
13 years ago
committed by
Ben Noordhuis
Ben Noordhuis
3 changed files with 238 additions and 64 deletions
@ -0,0 +1,110 @@ |
|||
// Copyright Joyent, Inc. and other Node contributors.
|
|||
|
|||
// Permission is hereby granted, free of charge, to any person obtaining a
|
|||
// copy of this software and associated documentation files (the
|
|||
// "Software"), to deal in the Software without restriction, including
|
|||
// without limitation the rights to use, copy, modify, merge, publish,
|
|||
// distribute, sublicense, and/or sell copies of the Software, and to permit
|
|||
// persons to whom the Software is furnished to do so, subject to the
|
|||
// following conditions:
|
|||
|
|||
// The above copyright notice and this permission notice shall be included
|
|||
// in all copies or substantial portions of the Software.
|
|||
|
|||
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|||
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|||
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
|||
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
|||
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|||
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
|||
// USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|||
|
|||
/* |
|||
* Test to verify we are using Typed Arrays |
|||
* (http://www.khronos.org/registry/typedarray/specs/latest/) correctly Test to
|
|||
* verify Buffer can used in Typed Arrays |
|||
*/ |
|||
|
|||
var assert = require('assert'); |
|||
var SlowBuffer = process.binding('buffer').SlowBuffer; |
|||
var ArrayBuffer = process.binding('typed_array').ArrayBuffer; |
|||
var Int32Array = process.binding('typed_array').Int32Array; |
|||
var Int16Array = process.binding('typed_array').Int16Array; |
|||
var Uint8Array = process.binding('typed_array').Uint8Array; |
|||
|
|||
function test(clazz) { |
|||
var size = clazz.length; |
|||
var b = clazz; |
|||
|
|||
// create a view v1 referring to b, of type Int32, starting at
|
|||
// the default byte index (0) and extending until the end of the buffer
|
|||
var v1 = new Int32Array(b); |
|||
assert(4, v1.BYTES_PER_ELEMENT); |
|||
|
|||
// create a view v2 referring to b, of type Uint8, starting at
|
|||
// byte index 2 and extending until the end of the buffer
|
|||
var v2 = new Uint8Array(b, 2); |
|||
assert(1, v1.BYTES_PER_ELEMENT); |
|||
|
|||
// create a view v3 referring to b, of type Int16, starting at
|
|||
// byte index 2 and having a length of 2
|
|||
var v3 = new Int16Array(b, 2, 2); |
|||
assert(2, v1.BYTES_PER_ELEMENT); |
|||
|
|||
// The layout is now
|
|||
// var index
|
|||
// b = |0|1|2|3|4|5|6|7| bytes (not indexable)
|
|||
// v1 = |0 |1 | indices (indexable)
|
|||
// v2 = |0|1|2|3|4|5|
|
|||
// v3 = |0 |1 |
|
|||
|
|||
// testing values
|
|||
v1[0] = 0x1234; |
|||
v1[1] = 0x5678; |
|||
|
|||
assert(0x1234, v1[0]); |
|||
assert(0x5678, v1[1]); |
|||
|
|||
assert(0x3, v2[0]); |
|||
assert(0x4, v2[1]); |
|||
assert(0x5, v2[2]); |
|||
assert(0x6, v2[3]); |
|||
assert(0x7, v2[4]); |
|||
assert(0x8, v2[5]); |
|||
|
|||
assert(0x34, v3[0]); |
|||
assert(0x56, v3[1]); |
|||
|
|||
// test get/set
|
|||
v2.set(1, 0x8); |
|||
v2.set(2, 0xF); |
|||
assert(0x8, v2.get(1)); |
|||
assert(0xF, v2.get(2)); |
|||
assert(0x38, v3.get(0)); |
|||
assert(0xF6, v3.get(1)); |
|||
|
|||
// test subarray
|
|||
var v4 = v1.subarray(1); |
|||
assert(Int32Array, typeof v4); |
|||
assert(0xF678, v4[0]); |
|||
|
|||
// test set with typed array and []
|
|||
v2.set([ 1, 2, 3, 4 ], 2); |
|||
assert(0x1234, v1[0]); |
|||
|
|||
var sub = new Int32Array(4); |
|||
sub[0] = 0xabcd; |
|||
v2.set(sub, 1); |
|||
assert(0x3a, v3[0]); |
|||
assert(0xbc, v3[1]); |
|||
} |
|||
|
|||
// basic Typed Arrays tests
|
|||
var size = 8; |
|||
var ab = new ArrayBuffer(size); |
|||
assert.equal(size, ab.byteLength); |
|||
test(ab); |
|||
|
|||
// testing sharing Buffer object
|
|||
var buffer = new Buffer(size); |
|||
test(buffer); |
|||
Loading…
Reference in new issue