6ae2cafde3The offset was formerly coerced to a integer and this reimplements that. PR-URL: https://github.com/nodejs/node/pull/18215 Fixes: https://github.com/nodejs/node/issues/18208 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Richard Lau <riclau@uk.ibm.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de>
129 lines
4 KiB
JavaScript
129 lines
4 KiB
JavaScript
// 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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'use strict';
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/*
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* Tests to verify we're reading in doubles correctly
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*/
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require('../common');
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const assert = require('assert');
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/*
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* Test (64 bit) double
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*/
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const buffer = Buffer.allocUnsafe(8);
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buffer[0] = 0x55;
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buffer[1] = 0x55;
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buffer[2] = 0x55;
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buffer[3] = 0x55;
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buffer[4] = 0x55;
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buffer[5] = 0x55;
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buffer[6] = 0xd5;
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buffer[7] = 0x3f;
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assert.strictEqual(1.1945305291680097e+103, buffer.readDoubleBE(0));
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assert.strictEqual(0.3333333333333333, buffer.readDoubleLE(0));
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buffer[0] = 1;
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buffer[1] = 0;
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buffer[2] = 0;
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buffer[3] = 0;
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buffer[4] = 0;
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buffer[5] = 0;
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buffer[6] = 0xf0;
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buffer[7] = 0x3f;
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assert.strictEqual(7.291122019655968e-304, buffer.readDoubleBE(0));
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assert.strictEqual(1.0000000000000002, buffer.readDoubleLE(0));
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buffer[0] = 2;
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assert.strictEqual(4.778309726801735e-299, buffer.readDoubleBE(0));
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assert.strictEqual(1.0000000000000004, buffer.readDoubleLE(0));
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buffer[0] = 1;
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buffer[6] = 0;
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buffer[7] = 0;
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assert.strictEqual(7.291122019556398e-304, buffer.readDoubleBE(0));
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assert.strictEqual(5e-324, buffer.readDoubleLE(0));
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buffer[0] = 0xff;
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buffer[1] = 0xff;
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buffer[2] = 0xff;
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buffer[3] = 0xff;
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buffer[4] = 0xff;
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buffer[5] = 0xff;
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buffer[6] = 0x0f;
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buffer[7] = 0x00;
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assert.ok(Number.isNaN(buffer.readDoubleBE(0)));
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assert.strictEqual(2.225073858507201e-308, buffer.readDoubleLE(0));
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buffer[6] = 0xef;
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buffer[7] = 0x7f;
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assert.ok(Number.isNaN(buffer.readDoubleBE(0)));
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assert.strictEqual(1.7976931348623157e+308, buffer.readDoubleLE(0));
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buffer[0] = 0;
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buffer[1] = 0;
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buffer[2] = 0;
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buffer[3] = 0;
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buffer[4] = 0;
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buffer[5] = 0;
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buffer[6] = 0xf0;
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buffer[7] = 0x3f;
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assert.strictEqual(3.03865e-319, buffer.readDoubleBE(0));
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assert.strictEqual(1, buffer.readDoubleLE(0));
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buffer[6] = 0;
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buffer[7] = 0x40;
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assert.strictEqual(3.16e-322, buffer.readDoubleBE(0));
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assert.strictEqual(2, buffer.readDoubleLE(0));
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buffer[7] = 0xc0;
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assert.strictEqual(9.5e-322, buffer.readDoubleBE(0));
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assert.strictEqual(-2, buffer.readDoubleLE(0));
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buffer[6] = 0x10;
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buffer[7] = 0;
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assert.strictEqual(2.0237e-320, buffer.readDoubleBE(0));
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assert.strictEqual(2.2250738585072014e-308, buffer.readDoubleLE(0));
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buffer[6] = 0;
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assert.strictEqual(0, buffer.readDoubleBE(0));
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assert.strictEqual(0, buffer.readDoubleLE(0));
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assert.strictEqual(false, 1 / buffer.readDoubleLE(0) < 0);
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buffer[7] = 0x80;
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assert.strictEqual(6.3e-322, buffer.readDoubleBE(0));
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assert.strictEqual(-0, buffer.readDoubleLE(0));
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assert.strictEqual(true, 1 / buffer.readDoubleLE(0) < 0);
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buffer[6] = 0xf0;
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buffer[7] = 0x7f;
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assert.strictEqual(3.0418e-319, buffer.readDoubleBE(0));
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assert.strictEqual(Infinity, buffer.readDoubleLE(0));
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buffer[7] = 0xff;
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assert.strictEqual(3.04814e-319, buffer.readDoubleBE(0));
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assert.strictEqual(-Infinity, buffer.readDoubleLE(0));
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buffer.writeDoubleBE(246800);
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assert.strictEqual(buffer.readDoubleBE(), 246800);
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assert.strictEqual(buffer.readDoubleBE(0.7), 246800);
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assert.strictEqual(buffer.readDoubleBE(NaN), 246800);
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