| // 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 SlowBuffer = process.binding('buffer').SlowBuffer; |
| 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); |
| test(SlowBuffer); |