pax_global_header00006660000000000000000000000064127744077710014532gustar00rootroot0000000000000052 comment=53d3f869cc527852156b8307353c55addc3e03ae ieee754-1.1.8/000077500000000000000000000000001277440777100127105ustar00rootroot00000000000000ieee754-1.1.8/.travis.yml000066400000000000000000000006451277440777100150260ustar00rootroot00000000000000language: node_js node_js: - 'node' env: global: - secure: f3NrmOV/A7oACn47J1mkIpH8Sn/LINtluZvo/9pGo3Ss4+D2lyt7UawpedHtnYgU9WEyjPSi7pDWopUrIzusQ2trLYRJr8WAOEyHlgaepDyy4BW3ghGMKHMsS05kilYLP8nu1sRd6y1AcUYKw+kUrrSPanI7kViWVQ5d5DuwXO8= - secure: a6teILh33z5fbGQbh5/EkFfAyXfa2fPJG1upy9K+jLAbG4WZxXD+YmXG9Tz33/2NJm6UplGfTJ8IQEXgxEfAFk3ao3xfKxzm3i64XxtroSlXIFNSiQKogxDfLEtWDoNNCodPHaV3ATEqxGJ5rkkUeU1+ROWW0sjG5JR26k8/Hfg= ieee754-1.1.8/.zuul.yml000066400000000000000000000005361277440777100145140ustar00rootroot00000000000000ui: tape scripts: - "./test/_polyfill.js" browsers: - name: chrome version: latest - name: firefox version: latest - name: safari version: latest - name: ie version: 11 - name: microsoftedge version: latest - name: opera version: latest - name: android version: latest - name: iphone version: latest ieee754-1.1.8/LICENSE000066400000000000000000000027421277440777100137220ustar00rootroot00000000000000Copyright (c) 2008, Fair Oaks Labs, Inc. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of Fair Oaks Labs, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ieee754-1.1.8/README.md000066400000000000000000000026051277440777100141720ustar00rootroot00000000000000# ieee754 [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][npm-url] [![saucelabs][saucelabs-image]][saucelabs-url] [travis-image]: https://img.shields.io/travis/feross/ieee754/master.svg [travis-url]: https://travis-ci.org/feross/ieee754 [npm-image]: https://img.shields.io/npm/v/ieee754.svg [npm-url]: https://npmjs.org/package/ieee754 [downloads-image]: https://img.shields.io/npm/dm/ieee754.svg [saucelabs-image]: https://saucelabs.com/browser-matrix/ieee754.svg [saucelabs-url]: https://saucelabs.com/u/ieee754 ### Read/write IEEE754 floating point numbers from/to a Buffer or array-like object. ## install ``` npm install ieee754 ``` ## methods `var ieee754 = require('ieee754')` The `ieee754` object has the following functions: ``` ieee754.read = function (buffer, offset, isLE, mLen, nBytes) ieee754.write = function (buffer, value, offset, isLE, mLen, nBytes) ``` The arguments mean the following: - buffer = the buffer - offset = offset into the buffer - value = value to set (only for `write`) - isLe = is little endian? - mLen = mantissa length - nBytes = number of bytes ## what is ieee754? The IEEE Standard for Floating-Point Arithmetic (IEEE 754) is a technical standard for floating-point computation. [Read more](http://en.wikipedia.org/wiki/IEEE_floating_point). ## license BSD 3 Clause. Copyright (c) 2008, Fair Oaks Labs, Inc. ieee754-1.1.8/index.js000066400000000000000000000040061277440777100143550ustar00rootroot00000000000000exports.read = function (buffer, offset, isLE, mLen, nBytes) { var e, m var eLen = nBytes * 8 - mLen - 1 var eMax = (1 << eLen) - 1 var eBias = eMax >> 1 var nBits = -7 var i = isLE ? (nBytes - 1) : 0 var d = isLE ? -1 : 1 var s = buffer[offset + i] i += d e = s & ((1 << (-nBits)) - 1) s >>= (-nBits) nBits += eLen for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {} m = e & ((1 << (-nBits)) - 1) e >>= (-nBits) nBits += mLen for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {} if (e === 0) { e = 1 - eBias } else if (e === eMax) { return m ? NaN : ((s ? -1 : 1) * Infinity) } else { m = m + Math.pow(2, mLen) e = e - eBias } return (s ? -1 : 1) * m * Math.pow(2, e - mLen) } exports.write = function (buffer, value, offset, isLE, mLen, nBytes) { var e, m, c var eLen = nBytes * 8 - mLen - 1 var eMax = (1 << eLen) - 1 var eBias = eMax >> 1 var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0) var i = isLE ? 0 : (nBytes - 1) var d = isLE ? 1 : -1 var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0 value = Math.abs(value) if (isNaN(value) || value === Infinity) { m = isNaN(value) ? 1 : 0 e = eMax } else { e = Math.floor(Math.log(value) / Math.LN2) if (value * (c = Math.pow(2, -e)) < 1) { e-- c *= 2 } if (e + eBias >= 1) { value += rt / c } else { value += rt * Math.pow(2, 1 - eBias) } if (value * c >= 2) { e++ c /= 2 } if (e + eBias >= eMax) { m = 0 e = eMax } else if (e + eBias >= 1) { m = (value * c - 1) * Math.pow(2, mLen) e = e + eBias } else { m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen) e = 0 } } for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {} e = (e << mLen) | m eLen += mLen for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {} buffer[offset + i - d] |= s * 128 } ieee754-1.1.8/package.json000066400000000000000000000015711277440777100152020ustar00rootroot00000000000000{ "name": "ieee754", "description": "Read/write IEEE754 floating point numbers from/to a Buffer or array-like object", "version": "1.1.8", "author": { "name": "Feross Aboukhadijeh", "email": "feross@feross.org", "url": "http://feross.org" }, "contributors": [ "Romain Beauxis " ], "devDependencies": { "standard": "*", "tape": "^4.0.0", "zuul": "^3.0.0" }, "keywords": [ "IEEE 754", "buffer", "convert", "floating point", "ieee754" ], "license": "BSD-3-Clause", "main": "index.js", "repository": { "type": "git", "url": "git://github.com/feross/ieee754.git" }, "scripts": { "test": "standard && npm run test-node && npm run test-browser", "test-browser": "zuul -- test/*.js", "test-browser-local": "zuul --local -- test/*.js", "test-node": "tape test/*.js" } } ieee754-1.1.8/test/000077500000000000000000000000001277440777100136675ustar00rootroot00000000000000ieee754-1.1.8/test/basic.js000066400000000000000000000007151277440777100153110ustar00rootroot00000000000000var ieee754 = require('../') var test = require('tape') var EPSILON = 0.00001 test('read float', function (t) { var buf = new Buffer(4) buf.writeFloatLE(42.42, 0) var num = ieee754.read(buf, 0, true, 23, 4) t.ok(Math.abs(num - 42.42) < EPSILON) t.end() }) test('write float', function (t) { var buf = new Buffer(4) ieee754.write(buf, 42.42, 0, true, 23, 4) var num = buf.readFloatLE(0) t.ok(Math.abs(num - 42.42) < EPSILON) t.end() })