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197 lines
6.7 KiB
197 lines
6.7 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 doubles 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(16);
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buffer.writeDoubleBE(2.225073858507201e-308, 0);
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buffer.writeDoubleLE(2.225073858507201e-308, 8);
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ASSERT.equal(0x00, buffer[0]);
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ASSERT.equal(0x0f, 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(0xff, buffer[6]);
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ASSERT.equal(0xff, buffer[7]);
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ASSERT.equal(0xff, buffer[8]);
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ASSERT.equal(0xff, buffer[9]);
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ASSERT.equal(0xff, buffer[10]);
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ASSERT.equal(0xff, buffer[11]);
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ASSERT.equal(0xff, buffer[12]);
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ASSERT.equal(0xff, buffer[13]);
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ASSERT.equal(0x0f, buffer[14]);
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ASSERT.equal(0x00, buffer[15]);
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buffer.writeDoubleBE(1.0000000000000004, 0);
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buffer.writeDoubleLE(1.0000000000000004, 8);
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ASSERT.equal(0x3f, buffer[0]);
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ASSERT.equal(0xf0, 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(0x02, buffer[7]);
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ASSERT.equal(0x02, buffer[8]);
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ASSERT.equal(0x00, buffer[9]);
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ASSERT.equal(0x00, buffer[10]);
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ASSERT.equal(0x00, buffer[11]);
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ASSERT.equal(0x00, buffer[12]);
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ASSERT.equal(0x00, buffer[13]);
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ASSERT.equal(0xf0, buffer[14]);
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ASSERT.equal(0x3f, buffer[15]);
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buffer.writeDoubleBE(-2, 0);
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buffer.writeDoubleLE(-2, 8);
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ASSERT.equal(0xc0, 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(0x00, buffer[7]);
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ASSERT.equal(0x00, buffer[8]);
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ASSERT.equal(0x00, buffer[9]);
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ASSERT.equal(0x00, buffer[10]);
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ASSERT.equal(0x00, buffer[11]);
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ASSERT.equal(0x00, buffer[12]);
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ASSERT.equal(0x00, buffer[13]);
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ASSERT.equal(0x00, buffer[14]);
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ASSERT.equal(0xc0, buffer[15]);
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buffer.writeDoubleBE(1.7976931348623157e+308, 0);
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buffer.writeDoubleLE(1.7976931348623157e+308, 8);
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ASSERT.equal(0x7f, buffer[0]);
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ASSERT.equal(0xef, 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(0xff, buffer[6]);
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ASSERT.equal(0xff, buffer[7]);
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ASSERT.equal(0xff, buffer[8]);
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ASSERT.equal(0xff, buffer[9]);
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ASSERT.equal(0xff, buffer[10]);
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ASSERT.equal(0xff, buffer[11]);
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ASSERT.equal(0xff, buffer[12]);
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ASSERT.equal(0xff, buffer[13]);
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ASSERT.equal(0xef, buffer[14]);
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ASSERT.equal(0x7f, buffer[15]);
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buffer.writeDoubleBE(0 * -1, 0);
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buffer.writeDoubleLE(0 * -1, 8);
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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(0x00, buffer[7]);
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ASSERT.equal(0x00, buffer[8]);
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ASSERT.equal(0x00, buffer[9]);
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ASSERT.equal(0x00, buffer[10]);
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ASSERT.equal(0x00, buffer[11]);
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ASSERT.equal(0x00, buffer[12]);
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ASSERT.equal(0x00, buffer[13]);
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ASSERT.equal(0x00, buffer[14]);
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ASSERT.equal(0x80, buffer[15]);
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buffer.writeDoubleBE(Infinity, 0);
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buffer.writeDoubleLE(Infinity, 8);
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ASSERT.equal(0x7F, buffer[0]);
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ASSERT.equal(0xF0, 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(0x00, buffer[7]);
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ASSERT.equal(0x00, buffer[8]);
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ASSERT.equal(0x00, buffer[9]);
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ASSERT.equal(0x00, buffer[10]);
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ASSERT.equal(0x00, buffer[11]);
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ASSERT.equal(0x00, buffer[12]);
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ASSERT.equal(0x00, buffer[13]);
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ASSERT.equal(0xF0, buffer[14]);
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ASSERT.equal(0x7F, buffer[15]);
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ASSERT.equal(Infinity, buffer.readDoubleBE(0));
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ASSERT.equal(Infinity, buffer.readDoubleLE(8));
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buffer.writeDoubleBE(-Infinity, 0);
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buffer.writeDoubleLE(-Infinity, 8);
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ASSERT.equal(0xFF, buffer[0]);
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ASSERT.equal(0xF0, 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(0x00, buffer[7]);
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ASSERT.equal(0x00, buffer[8]);
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ASSERT.equal(0x00, buffer[9]);
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ASSERT.equal(0x00, buffer[10]);
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ASSERT.equal(0x00, buffer[11]);
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ASSERT.equal(0x00, buffer[12]);
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ASSERT.equal(0x00, buffer[13]);
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ASSERT.equal(0xF0, buffer[14]);
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ASSERT.equal(0xFF, buffer[15]);
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ASSERT.equal(-Infinity, buffer.readDoubleBE(0));
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ASSERT.equal(-Infinity, buffer.readDoubleLE(8));
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buffer.writeDoubleBE(NaN, 0);
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buffer.writeDoubleLE(NaN, 8);
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// Darwin ia32 does the other kind of NaN.
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// Compiler bug. No one really cares.
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ASSERT(0x7F === buffer[0] || 0xFF === buffer[0]);
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ASSERT.equal(0xF8, 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(0x00, buffer[7]);
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ASSERT.equal(0x00, buffer[8]);
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ASSERT.equal(0x00, buffer[9]);
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ASSERT.equal(0x00, buffer[10]);
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ASSERT.equal(0x00, buffer[11]);
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ASSERT.equal(0x00, buffer[12]);
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ASSERT.equal(0x00, buffer[13]);
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ASSERT.equal(0xF8, buffer[14]);
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// Darwin ia32 does the other kind of NaN.
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// Compiler bug. No one really cares.
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ASSERT(0x7F === buffer[15] || 0xFF === buffer[15]);
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ASSERT.ok(isNaN(buffer.readDoubleBE(0)));
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ASSERT.ok(isNaN(buffer.readDoubleLE(8)));
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}
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test(Buffer);
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test(SlowBuffer);
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