mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
133 lines
4.5 KiB
133 lines
4.5 KiB
// 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.
|
|
|
|
/*
|
|
* Tests to verify we're writing floats correctly
|
|
*/
|
|
var common = require('../common');
|
|
var ASSERT = require('assert');
|
|
|
|
function test(clazz) {
|
|
var buffer = new clazz(8);
|
|
|
|
buffer.writeFloatBE(1, 0);
|
|
buffer.writeFloatLE(1, 4);
|
|
ASSERT.equal(0x3f, buffer[0]);
|
|
ASSERT.equal(0x80, buffer[1]);
|
|
ASSERT.equal(0x00, buffer[2]);
|
|
ASSERT.equal(0x00, buffer[3]);
|
|
ASSERT.equal(0x00, buffer[4]);
|
|
ASSERT.equal(0x00, buffer[5]);
|
|
ASSERT.equal(0x80, buffer[6]);
|
|
ASSERT.equal(0x3f, buffer[7]);
|
|
|
|
buffer.writeFloatBE(1 / 3, 0);
|
|
buffer.writeFloatLE(1 / 3, 4);
|
|
ASSERT.equal(0x3e, buffer[0]);
|
|
ASSERT.equal(0xaa, buffer[1]);
|
|
ASSERT.equal(0xaa, buffer[2]);
|
|
ASSERT.equal(0xab, buffer[3]);
|
|
ASSERT.equal(0xab, buffer[4]);
|
|
ASSERT.equal(0xaa, buffer[5]);
|
|
ASSERT.equal(0xaa, buffer[6]);
|
|
ASSERT.equal(0x3e, buffer[7]);
|
|
|
|
buffer.writeFloatBE(3.4028234663852886e+38, 0);
|
|
buffer.writeFloatLE(3.4028234663852886e+38, 4);
|
|
ASSERT.equal(0x7f, buffer[0]);
|
|
ASSERT.equal(0x7f, buffer[1]);
|
|
ASSERT.equal(0xff, buffer[2]);
|
|
ASSERT.equal(0xff, buffer[3]);
|
|
ASSERT.equal(0xff, buffer[4]);
|
|
ASSERT.equal(0xff, buffer[5]);
|
|
ASSERT.equal(0x7f, buffer[6]);
|
|
ASSERT.equal(0x7f, buffer[7]);
|
|
|
|
buffer.writeFloatLE(1.1754943508222875e-38, 0);
|
|
buffer.writeFloatBE(1.1754943508222875e-38, 4);
|
|
ASSERT.equal(0x00, buffer[0]);
|
|
ASSERT.equal(0x00, buffer[1]);
|
|
ASSERT.equal(0x80, buffer[2]);
|
|
ASSERT.equal(0x00, buffer[3]);
|
|
ASSERT.equal(0x00, buffer[4]);
|
|
ASSERT.equal(0x80, buffer[5]);
|
|
ASSERT.equal(0x00, buffer[6]);
|
|
ASSERT.equal(0x00, buffer[7]);
|
|
|
|
buffer.writeFloatBE(0 * -1, 0);
|
|
buffer.writeFloatLE(0 * -1, 4);
|
|
ASSERT.equal(0x80, buffer[0]);
|
|
ASSERT.equal(0x00, buffer[1]);
|
|
ASSERT.equal(0x00, buffer[2]);
|
|
ASSERT.equal(0x00, buffer[3]);
|
|
ASSERT.equal(0x00, buffer[4]);
|
|
ASSERT.equal(0x00, buffer[5]);
|
|
ASSERT.equal(0x00, buffer[6]);
|
|
ASSERT.equal(0x80, buffer[7]);
|
|
|
|
buffer.writeFloatBE(Infinity, 0);
|
|
buffer.writeFloatLE(Infinity, 4);
|
|
ASSERT.equal(0x7F, buffer[0]);
|
|
ASSERT.equal(0x80, buffer[1]);
|
|
ASSERT.equal(0x00, buffer[2]);
|
|
ASSERT.equal(0x00, buffer[3]);
|
|
ASSERT.equal(0x00, buffer[4]);
|
|
ASSERT.equal(0x00, buffer[5]);
|
|
ASSERT.equal(0x80, buffer[6]);
|
|
ASSERT.equal(0x7F, buffer[7]);
|
|
ASSERT.equal(Infinity, buffer.readFloatBE(0));
|
|
ASSERT.equal(Infinity, buffer.readFloatLE(4));
|
|
|
|
buffer.writeFloatBE(-Infinity, 0);
|
|
buffer.writeFloatLE(-Infinity, 4);
|
|
// Darwin ia32 does the other kind of NaN.
|
|
// Compiler bug. No one really cares.
|
|
ASSERT(0xFF === buffer[0] || 0x7F === buffer[0]);
|
|
ASSERT.equal(0x80, buffer[1]);
|
|
ASSERT.equal(0x00, buffer[2]);
|
|
ASSERT.equal(0x00, buffer[3]);
|
|
ASSERT.equal(0x00, buffer[4]);
|
|
ASSERT.equal(0x00, buffer[5]);
|
|
ASSERT.equal(0x80, buffer[6]);
|
|
ASSERT.equal(0xFF, buffer[7]);
|
|
ASSERT.equal(-Infinity, buffer.readFloatBE(0));
|
|
ASSERT.equal(-Infinity, buffer.readFloatLE(4));
|
|
|
|
buffer.writeFloatBE(NaN, 0);
|
|
buffer.writeFloatLE(NaN, 4);
|
|
// Darwin ia32 does the other kind of NaN.
|
|
// Compiler bug. No one really cares.
|
|
ASSERT(0x7F === buffer[0] || 0xFF === buffer[0]);
|
|
ASSERT.equal(0xc0, buffer[1]);
|
|
ASSERT.equal(0x00, buffer[2]);
|
|
ASSERT.equal(0x00, buffer[3]);
|
|
ASSERT.equal(0x00, buffer[4]);
|
|
ASSERT.equal(0x00, buffer[5]);
|
|
ASSERT.equal(0xc0, buffer[6]);
|
|
// Darwin ia32 does the other kind of NaN.
|
|
// Compiler bug. No one really cares.
|
|
ASSERT(0x7F === buffer[7] || 0xFF === buffer[7]);
|
|
ASSERT.ok(isNaN(buffer.readFloatBE(0)));
|
|
ASSERT.ok(isNaN(buffer.readFloatLE(4)));
|
|
}
|
|
|
|
|
|
test(Buffer);
|
|
|