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129 lines
4.3 KiB
129 lines
4.3 KiB
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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/*
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* Tests to verify we're writing floats correctly
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*/
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var SlowBuffer = process.binding('buffer').SlowBuffer;
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var common = require('../common');
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var ASSERT = require('assert');
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function test(clazz) {
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var buffer = new clazz(8);
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buffer.writeFloatBE(1, 0);
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buffer.writeFloatLE(1, 4);
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ASSERT.equal(0x3f, buffer[0]);
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ASSERT.equal(0x80, buffer[1]);
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ASSERT.equal(0x00, buffer[2]);
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ASSERT.equal(0x00, buffer[3]);
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ASSERT.equal(0x00, buffer[4]);
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ASSERT.equal(0x00, buffer[5]);
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ASSERT.equal(0x80, buffer[6]);
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ASSERT.equal(0x3f, buffer[7]);
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buffer.writeFloatBE(1.793662034335766e-43, 0);
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buffer.writeFloatLE(1.793662034335766e-43, 4);
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ASSERT.equal(0x00, buffer[0]);
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ASSERT.equal(0x00, buffer[1]);
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ASSERT.equal(0x00, buffer[2]);
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ASSERT.equal(0x80, buffer[3]);
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ASSERT.equal(0x80, buffer[4]);
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ASSERT.equal(0x00, buffer[5]);
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ASSERT.equal(0x00, buffer[6]);
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ASSERT.equal(0x00, buffer[7]);
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buffer.writeFloatBE(1 / 3, 0);
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buffer.writeFloatLE(1 / 3, 4);
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ASSERT.equal(0x3e, buffer[0]);
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ASSERT.equal(0xaa, buffer[1]);
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ASSERT.equal(0xaa, buffer[2]);
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ASSERT.equal(0xab, buffer[3]);
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ASSERT.equal(0xab, buffer[4]);
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ASSERT.equal(0xaa, buffer[5]);
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ASSERT.equal(0xaa, buffer[6]);
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ASSERT.equal(0x3e, buffer[7]);
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buffer.writeFloatBE(3.4028234663852886e+38, 0);
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buffer.writeFloatLE(3.4028234663852886e+38, 4);
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ASSERT.equal(0x7f, buffer[0]);
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ASSERT.equal(0x7f, buffer[1]);
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ASSERT.equal(0xff, buffer[2]);
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ASSERT.equal(0xff, buffer[3]);
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ASSERT.equal(0xff, buffer[4]);
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ASSERT.equal(0xff, buffer[5]);
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ASSERT.equal(0x7f, buffer[6]);
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ASSERT.equal(0x7f, buffer[7]);
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buffer.writeFloatBE(0 * -1, 0);
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buffer.writeFloatLE(0 * -1, 4);
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ASSERT.equal(0x80, buffer[0]);
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ASSERT.equal(0x00, buffer[1]);
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ASSERT.equal(0x00, buffer[2]);
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ASSERT.equal(0x00, buffer[3]);
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ASSERT.equal(0x00, buffer[4]);
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ASSERT.equal(0x00, buffer[5]);
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ASSERT.equal(0x00, buffer[6]);
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ASSERT.equal(0x80, buffer[7]);
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buffer.writeFloatBE(Infinity, 0);
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buffer.writeFloatLE(Infinity, 4);
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ASSERT.equal(0x7F, buffer[0]);
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ASSERT.equal(0x80, buffer[1]);
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ASSERT.equal(0x00, buffer[2]);
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ASSERT.equal(0x00, buffer[3]);
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ASSERT.equal(0x00, buffer[4]);
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ASSERT.equal(0x00, buffer[5]);
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ASSERT.equal(0x80, buffer[6]);
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ASSERT.equal(0x7F, buffer[7]);
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ASSERT.equal(Infinity, buffer.readFloatBE(0));
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ASSERT.equal(Infinity, buffer.readFloatLE(4));
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buffer.writeFloatBE(-Infinity, 0);
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buffer.writeFloatLE(-Infinity, 4);
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ASSERT.equal(0xFF, buffer[0]);
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ASSERT.equal(0x80, buffer[1]);
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ASSERT.equal(0x00, buffer[2]);
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ASSERT.equal(0x00, buffer[3]);
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ASSERT.equal(0x00, buffer[4]);
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ASSERT.equal(0x00, buffer[5]);
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ASSERT.equal(0x80, buffer[6]);
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ASSERT.equal(0xFF, buffer[7]);
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ASSERT.equal(-Infinity, buffer.readFloatBE(0));
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ASSERT.equal(-Infinity, buffer.readFloatLE(4));
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buffer.writeFloatBE(NaN, 0);
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buffer.writeFloatLE(NaN, 4);
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ASSERT.equal(0x7F, buffer[0]);
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ASSERT.equal(0x80, buffer[1]);
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ASSERT.equal(0x00, buffer[2]);
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ASSERT.equal(0x01, buffer[3]);
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ASSERT.equal(0x01, buffer[4]);
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ASSERT.equal(0x00, buffer[5]);
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ASSERT.equal(0x80, buffer[6]);
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ASSERT.equal(0x7F, buffer[7]);
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ASSERT.ok(isNaN(buffer.readFloatBE(0)));
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ASSERT.ok(isNaN(buffer.readFloatLE(4)));
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}
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test(Buffer);
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test(SlowBuffer);
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