| // 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); |