Current File : //proc/self/root/usr/src/node-v0.10.4/test/simple/test-readdouble.js
// 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 reading in doubles correctly
*/
var SlowBuffer = process.binding('buffer').SlowBuffer;
var common = require('../common');
var ASSERT = require('assert');
/*
* Test (64 bit) double
*/
function test(clazz) {
var buffer = new clazz(8);
buffer[0] = 0x55;
buffer[1] = 0x55;
buffer[2] = 0x55;
buffer[3] = 0x55;
buffer[4] = 0x55;
buffer[5] = 0x55;
buffer[6] = 0xd5;
buffer[7] = 0x3f;
ASSERT.equal(1.1945305291680097e+103, buffer.readDoubleBE(0));
ASSERT.equal(0.3333333333333333, buffer.readDoubleLE(0));
buffer[0] = 1;
buffer[1] = 0;
buffer[2] = 0;
buffer[3] = 0;
buffer[4] = 0;
buffer[5] = 0;
buffer[6] = 0xf0;
buffer[7] = 0x3f;
ASSERT.equal(7.291122019655968e-304, buffer.readDoubleBE(0));
ASSERT.equal(1.0000000000000002, buffer.readDoubleLE(0));
buffer[0] = 2;
ASSERT.equal(4.778309726801735e-299, buffer.readDoubleBE(0));
ASSERT.equal(1.0000000000000004, buffer.readDoubleLE(0));
buffer[0] = 1;
buffer[6] = 0;
buffer[7] = 0;
ASSERT.equal(7.291122019556398e-304, buffer.readDoubleBE(0));
ASSERT.equal(5e-324, buffer.readDoubleLE(0));
buffer[0] = 0xff;
buffer[1] = 0xff;
buffer[2] = 0xff;
buffer[3] = 0xff;
buffer[4] = 0xff;
buffer[5] = 0xff;
buffer[6] = 0x0f;
buffer[7] = 0x00;
ASSERT.ok(isNaN(buffer.readDoubleBE(0)));
ASSERT.equal(2.225073858507201e-308, buffer.readDoubleLE(0));
buffer[6] = 0xef;
buffer[7] = 0x7f;
ASSERT.ok(isNaN(buffer.readDoubleBE(0)));
ASSERT.equal(1.7976931348623157e+308, buffer.readDoubleLE(0));
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0;
buffer[3] = 0;
buffer[4] = 0;
buffer[5] = 0;
buffer[6] = 0xf0;
buffer[7] = 0x3f;
ASSERT.equal(3.03865e-319, buffer.readDoubleBE(0));
ASSERT.equal(1, buffer.readDoubleLE(0));
buffer[6] = 0;
buffer[7] = 0x40;
ASSERT.equal(3.16e-322, buffer.readDoubleBE(0));
ASSERT.equal(2, buffer.readDoubleLE(0));
buffer[7] = 0xc0;
ASSERT.equal(9.5e-322, buffer.readDoubleBE(0));
ASSERT.equal(-2, buffer.readDoubleLE(0));
buffer[6] = 0x10;
buffer[7] = 0;
ASSERT.equal(2.0237e-320, buffer.readDoubleBE(0));
ASSERT.equal(2.2250738585072014e-308, buffer.readDoubleLE(0));
buffer[6] = 0;
ASSERT.equal(0, buffer.readDoubleBE(0));
ASSERT.equal(0, buffer.readDoubleLE(0));
ASSERT.equal(false, 1 / buffer.readDoubleLE(0) < 0);
buffer[7] = 0x80;
ASSERT.equal(6.3e-322, buffer.readDoubleBE(0));
ASSERT.equal(0, buffer.readDoubleLE(0));
ASSERT.equal(true, 1 / buffer.readDoubleLE(0) < 0);
buffer[6] = 0xf0;
buffer[7] = 0x7f;
ASSERT.equal(3.0418e-319, buffer.readDoubleBE(0));
ASSERT.equal(Infinity, buffer.readDoubleLE(0));
buffer[6] = 0xf0;
buffer[7] = 0xff;
ASSERT.equal(3.04814e-319, buffer.readDoubleBE(0));
ASSERT.equal(-Infinity, buffer.readDoubleLE(0));
}
test(Buffer);
test(SlowBuffer);
Mini Shell