| // 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 doubles correctly |
| */ |
| var SlowBuffer = process.binding('buffer').SlowBuffer; |
| var common = require('../common'); |
| var ASSERT = require('assert'); |
| |
| function test(clazz) { |
| var buffer = new clazz(16); |
| |
| buffer.writeDoubleBE(2.225073858507201e-308, 0); |
| buffer.writeDoubleLE(2.225073858507201e-308, 8); |
| ASSERT.equal(0x00, buffer[0]); |
| ASSERT.equal(0x0f, buffer[1]); |
| ASSERT.equal(0xff, buffer[2]); |
| ASSERT.equal(0xff, buffer[3]); |
| ASSERT.equal(0xff, buffer[4]); |
| ASSERT.equal(0xff, buffer[5]); |
| ASSERT.equal(0xff, buffer[6]); |
| ASSERT.equal(0xff, buffer[7]); |
| ASSERT.equal(0xff, buffer[8]); |
| ASSERT.equal(0xff, buffer[9]); |
| ASSERT.equal(0xff, buffer[10]); |
| ASSERT.equal(0xff, buffer[11]); |
| ASSERT.equal(0xff, buffer[12]); |
| ASSERT.equal(0xff, buffer[13]); |
| ASSERT.equal(0x0f, buffer[14]); |
| ASSERT.equal(0x00, buffer[15]); |
| |
| buffer.writeDoubleBE(1.0000000000000004, 0); |
| buffer.writeDoubleLE(1.0000000000000004, 8); |
| ASSERT.equal(0x3f, buffer[0]); |
| ASSERT.equal(0xf0, 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(0x02, buffer[7]); |
| ASSERT.equal(0x02, buffer[8]); |
| ASSERT.equal(0x00, buffer[9]); |
| ASSERT.equal(0x00, buffer[10]); |
| ASSERT.equal(0x00, buffer[11]); |
| ASSERT.equal(0x00, buffer[12]); |
| ASSERT.equal(0x00, buffer[13]); |
| ASSERT.equal(0xf0, buffer[14]); |
| ASSERT.equal(0x3f, buffer[15]); |
| |
| buffer.writeDoubleBE(-2, 0); |
| buffer.writeDoubleLE(-2, 8); |
| ASSERT.equal(0xc0, 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(0x00, buffer[7]); |
| ASSERT.equal(0x00, buffer[8]); |
| ASSERT.equal(0x00, buffer[9]); |
| ASSERT.equal(0x00, buffer[10]); |
| ASSERT.equal(0x00, buffer[11]); |
| ASSERT.equal(0x00, buffer[12]); |
| ASSERT.equal(0x00, buffer[13]); |
| ASSERT.equal(0x00, buffer[14]); |
| ASSERT.equal(0xc0, buffer[15]); |
| |
| buffer.writeDoubleBE(1.7976931348623157e+308, 0); |
| buffer.writeDoubleLE(1.7976931348623157e+308, 8); |
| ASSERT.equal(0x7f, buffer[0]); |
| ASSERT.equal(0xef, buffer[1]); |
| ASSERT.equal(0xff, buffer[2]); |
| ASSERT.equal(0xff, buffer[3]); |
| ASSERT.equal(0xff, buffer[4]); |
| ASSERT.equal(0xff, buffer[5]); |
| ASSERT.equal(0xff, buffer[6]); |
| ASSERT.equal(0xff, buffer[7]); |
| ASSERT.equal(0xff, buffer[8]); |
| ASSERT.equal(0xff, buffer[9]); |
| ASSERT.equal(0xff, buffer[10]); |
| ASSERT.equal(0xff, buffer[11]); |
| ASSERT.equal(0xff, buffer[12]); |
| ASSERT.equal(0xff, buffer[13]); |
| ASSERT.equal(0xef, buffer[14]); |
| ASSERT.equal(0x7f, buffer[15]); |
| |
| buffer.writeDoubleBE(0 * -1, 0); |
| buffer.writeDoubleLE(0 * -1, 8); |
| 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(0x00, buffer[7]); |
| ASSERT.equal(0x00, buffer[8]); |
| ASSERT.equal(0x00, buffer[9]); |
| ASSERT.equal(0x00, buffer[10]); |
| ASSERT.equal(0x00, buffer[11]); |
| ASSERT.equal(0x00, buffer[12]); |
| ASSERT.equal(0x00, buffer[13]); |
| ASSERT.equal(0x00, buffer[14]); |
| ASSERT.equal(0x80, buffer[15]); |
| |
| buffer.writeDoubleBE(Infinity, 0); |
| buffer.writeDoubleLE(Infinity, 8); |
| ASSERT.equal(0x7F, buffer[0]); |
| ASSERT.equal(0xF0, 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(0x00, buffer[7]); |
| ASSERT.equal(0x00, buffer[8]); |
| ASSERT.equal(0x00, buffer[9]); |
| ASSERT.equal(0x00, buffer[10]); |
| ASSERT.equal(0x00, buffer[11]); |
| ASSERT.equal(0x00, buffer[12]); |
| ASSERT.equal(0x00, buffer[13]); |
| ASSERT.equal(0xF0, buffer[14]); |
| ASSERT.equal(0x7F, buffer[15]); |
| ASSERT.equal(Infinity, buffer.readDoubleBE(0)); |
| ASSERT.equal(Infinity, buffer.readDoubleLE(8)); |
| |
| buffer.writeDoubleBE(-Infinity, 0); |
| buffer.writeDoubleLE(-Infinity, 8); |
| ASSERT.equal(0xFF, buffer[0]); |
| ASSERT.equal(0xF0, 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(0x00, buffer[7]); |
| ASSERT.equal(0x00, buffer[8]); |
| ASSERT.equal(0x00, buffer[9]); |
| ASSERT.equal(0x00, buffer[10]); |
| ASSERT.equal(0x00, buffer[11]); |
| ASSERT.equal(0x00, buffer[12]); |
| ASSERT.equal(0x00, buffer[13]); |
| ASSERT.equal(0xF0, buffer[14]); |
| ASSERT.equal(0xFF, buffer[15]); |
| ASSERT.equal(-Infinity, buffer.readDoubleBE(0)); |
| ASSERT.equal(-Infinity, buffer.readDoubleLE(8)); |
| |
| buffer.writeDoubleBE(NaN, 0); |
| buffer.writeDoubleLE(NaN, 8); |
| // Darwin ia32 does the other kind of NaN. |
| // Compiler bug. No one really cares. |
| ASSERT(0x7F === buffer[0] || 0xFF === buffer[0]); |
| ASSERT.equal(0xF8, 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(0x00, buffer[7]); |
| ASSERT.equal(0x00, buffer[8]); |
| ASSERT.equal(0x00, buffer[9]); |
| ASSERT.equal(0x00, buffer[10]); |
| ASSERT.equal(0x00, buffer[11]); |
| ASSERT.equal(0x00, buffer[12]); |
| ASSERT.equal(0x00, buffer[13]); |
| ASSERT.equal(0xF8, buffer[14]); |
| // Darwin ia32 does the other kind of NaN. |
| // Compiler bug. No one really cares. |
| ASSERT(0x7F === buffer[15] || 0xFF === buffer[15]); |
| ASSERT.ok(isNaN(buffer.readDoubleBE(0))); |
| ASSERT.ok(isNaN(buffer.readDoubleLE(8))); |
| } |
| |
| |
| test(Buffer); |
| test(SlowBuffer); |