| // 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 common = require('../common'); |
| var assert = require('assert'); |
| |
| [ |
| 'ArrayBuffer', |
| 'Int8Array', |
| 'Uint8Array', |
| 'Int16Array', |
| 'Uint16Array', |
| 'Int32Array', |
| 'Uint32Array', |
| 'Float32Array', |
| 'Float64Array', |
| 'Uint8ClampedArray' |
| ].forEach(function(name) { |
| var expected = '[object ' + name + ']'; |
| var clazz = global[name]; |
| var obj = new clazz(1); |
| |
| assert.equal(obj.toString(), expected); |
| assert.equal(Object.prototype.toString.call(obj), expected); |
| |
| obj = new DataView(obj.buffer || obj); |
| assert.equal(obj.toString(), '[object DataView]'); |
| assert.equal(Object.prototype.toString.call(obj), '[object DataView]'); |
| |
| // Calling constructor as function should work. |
| clazz(32); |
| }); |
| |
| // Calling constructor as function should work. |
| DataView(ArrayBuffer(32)); |
| |
| var buffer = new ArrayBuffer(16); |
| var uint8 = new Uint8Array(buffer); |
| var uint16 = new Uint16Array(buffer); |
| var uint16slice = new Uint16Array(buffer, 2, 2); |
| var uint32 = new Uint32Array(buffer); |
| |
| assert.equal(uint8.BYTES_PER_ELEMENT, 1); |
| assert.equal(uint16.BYTES_PER_ELEMENT, 2); |
| assert.equal(uint16slice.BYTES_PER_ELEMENT, 2); |
| assert.equal(uint32.BYTES_PER_ELEMENT, 4); |
| |
| // now change the underlying buffer |
| buffer[0] = 0x08; |
| buffer[1] = 0x09; |
| buffer[2] = 0x0a; |
| buffer[3] = 0x0b; |
| buffer[4] = 0x0c; |
| buffer[5] = 0x0d; |
| buffer[6] = 0x0e; |
| buffer[7] = 0x0f; |
| |
| /* |
| This is what we expect the variables to look like at this point (on |
| little-endian machines): |
| |
| uint8 | 0x08 | 0x09 | 0x0a | 0x0b | 0x0c | 0x0d | 0x0e | 0x0f | |
| uint16 | 0x0908 | 0x0b0a | 0x0d0c | 0x0f0e | |
| uint16slice --------------| 0x0b0a | 0x0d0c |-------------- |
| uint32 | 0x0b0a0908 | 0x0f0e0d0c | |
| */ |
| |
| assert.equal(uint8[0], 0x08); |
| assert.equal(uint8[1], 0x09); |
| assert.equal(uint8[2], 0x0a); |
| assert.equal(uint8[3], 0x0b); |
| assert.equal(uint8[4], 0x0c); |
| assert.equal(uint8[5], 0x0d); |
| assert.equal(uint8[6], 0x0e); |
| assert.equal(uint8[7], 0x0f); |
| |
| // determine whether or not typed array values are stored little-endian first |
| // internally |
| var IS_LITTLE_ENDIAN = (new Uint16Array([0x1234])).buffer[0] === 0x34; |
| |
| if (IS_LITTLE_ENDIAN) { |
| assert.equal(uint16[0], 0x0908); |
| assert.equal(uint16[1], 0x0b0a); |
| assert.equal(uint16[2], 0x0d0c); |
| assert.equal(uint16[3], 0x0f0e); |
| |
| assert.equal(uint16slice[0], 0x0b0a); |
| assert.equal(uint16slice[1], 0x0d0c); |
| |
| assert.equal(uint32[0], 0x0b0a0908); |
| assert.equal(uint32[1], 0x0f0e0d0c); |
| } else { |
| assert.equal(uint16[0], 0x0809); |
| assert.equal(uint16[1], 0x0a0b); |
| assert.equal(uint16[2], 0x0c0d); |
| assert.equal(uint16[3], 0x0e0f); |
| |
| assert.equal(uint16slice[0], 0x0a0b); |
| assert.equal(uint16slice[1], 0x0c0d); |
| |
| assert.equal(uint32[0], 0x08090a0b); |
| assert.equal(uint32[1], 0x0c0d0e0f); |
| } |
| |
| // test .subarray(begin, end) |
| var sub = uint8.subarray(2, 4); |
| |
| assert.ok(sub instanceof Uint8Array); |
| assert.equal(sub[0], 0x0a); |
| assert.equal(sub[1], 0x0b); |
| |
| // modifications of a value in the subarray of `uint8` should propagate to |
| // the other views |
| sub[0] = 0x12; |
| sub[1] = 0x34; |
| |
| assert.equal(uint8[2], 0x12); |
| assert.equal(uint8[3], 0x34); |
| |
| // test .set(index, value), .set(arr, offset) and .get(index) |
| uint8.set(1, 0x09); |
| uint8.set([0x0a, 0x0b], 2); |
| |
| assert.equal(uint8.get(1), 0x09); |
| assert.equal(uint8.get(2), 0x0a); |
| assert.equal(uint8.get(3), 0x0b); |
| |
| // test clamped array |
| var uint8c = new Uint8ClampedArray(buffer); |
| uint8c[0] = -1; |
| uint8c[1] = 257; |
| |
| assert.equal(uint8c[0], 0); |
| assert.equal(uint8c[1], 255); |
| |
| uint8c.set(0, -10); |
| uint8c.set(1, 260); |
| |
| assert.equal(uint8c[0], 0); |
| assert.equal(uint8c[1], 255); |
| |
| (function() { |
| var numbers = []; |
| for (var i = 128; i <= 255; ++i) numbers.push(i); |
| var array = new Uint8Array(numbers); |
| var view = new DataView(array.buffer); |
| for (var i = 128; i <= 255; ++i) assert.equal(view.getInt8(i - 128), i - 256); |
| })(); |
| |
| assert.throws(function() { |
| var buf = new DataView(new ArrayBuffer(8)); |
| buf.getFloat64(0xffffffff, true); |
| }, /Index out of range/); |
| |
| assert.throws(function() { |
| var buf = new DataView(new ArrayBuffer(8)); |
| buf.setFloat64(0xffffffff, 0.0, true); |
| }, /Index out of range/); |
| |
| // DataView::setGeneric() default endianness regression test, |
| // see https://github.com/joyent/node/issues/4626 |
| (function() { |
| var buf = new Uint8Array(2); |
| var view = new DataView(buf.buffer); |
| view.setUint16(0, 1); |
| assert.equal(view.getUint16(0), 1); |
| })(); |
| |
| (function() { |
| // Typed array should make a copy of the buffer object, i.e. it's not shared. |
| var b = new Buffer([0]); |
| var a = new Uint8Array(b); |
| assert.notEqual(a.buffer, b); |
| assert.equal(a[0], 0); |
| assert.equal(b[0], 0); |
| a[0] = 1; |
| assert.equal(a[0], 1); |
| assert.equal(b[0], 0); |
| a[0] = 0; |
| b[0] = 1; |
| assert.equal(a[0], 0); |
| assert.equal(b[0], 1); |
| })(); |
| |
| (function() { |
| // Backing store should not be shared. |
| var a = new Uint8Array(1); |
| var b = new Uint8Array(a); |
| a[0] = 0; |
| b[0] = 1; |
| assert.equal(a[0], 0); |
| assert.equal(b[0], 1); |
| assert.notEqual(a, b.buffer); |
| assert.notEqual(a.buffer, b.buffer); |
| })(); |
| |
| (function() { |
| // Backing store should not be shared. |
| var a = new Uint8Array(2); |
| var b = new Uint16Array(a); |
| a[0] = 0; |
| a[1] = 0; |
| b[0] = 257; |
| assert.equal(a[0], 0); |
| assert.equal(a[1], 0); |
| assert.equal(b[0], 257); |
| assert.notEqual(a, b.buffer); |
| assert.notEqual(a.buffer, b.buffer); |
| })(); |
| |
| (function() { |
| // Backing store should be shared. |
| var abuf = new ArrayBuffer(32); |
| var a = new Uint8Array(abuf); |
| var b = new Uint8Array(abuf); |
| a[0] = 0; |
| b[0] = 1; |
| assert.equal(a[0], 1); |
| assert.equal(b[0], 1); |
| assert.equal(a.buffer, b.buffer); |
| })(); |
| |
| assert.throws(function() { |
| new DataView(new Int8Array(1)); |
| }); |