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26
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Copyright (c) 2016, Daniel Wirtz 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 its author, 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.

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@protobufjs/float
=================
[![npm](https://img.shields.io/npm/v/@protobufjs/float.svg)](https://www.npmjs.com/package/@protobufjs/float)
Reads / writes floats / doubles from / to buffers in both modern and ancient browsers. Fast.
API
---
* **writeFloatLE(val: `number`, buf: `Uint8Array`, pos: `number`)**<br />
Writes a 32 bit float to a buffer using little endian byte order.
* **writeFloatBE(val: `number`, buf: `Uint8Array`, pos: `number`)**<br />
Writes a 32 bit float to a buffer using big endian byte order.
* **readFloatLE(buf: `Uint8Array`, pos: `number`): `number`**<br />
Reads a 32 bit float from a buffer using little endian byte order.
* **readFloatBE(buf: `Uint8Array`, pos: `number`): `number`**<br />
Reads a 32 bit float from a buffer using big endian byte order.
* **writeDoubleLE(val: `number`, buf: `Uint8Array`, pos: `number`)**<br />
Writes a 64 bit double to a buffer using little endian byte order.
* **writeDoubleBE(val: `number`, buf: `Uint8Array`, pos: `number`)**<br />
Writes a 64 bit double to a buffer using big endian byte order.
* **readDoubleLE(buf: `Uint8Array`, pos: `number`): `number`**<br />
Reads a 64 bit double from a buffer using little endian byte order.
* **readDoubleBE(buf: `Uint8Array`, pos: `number`): `number`**<br />
Reads a 64 bit double from a buffer using big endian byte order.
Performance
-----------
There is a simple benchmark included comparing raw read/write performance of this library (float), float's fallback for old browsers, the [ieee754](https://www.npmjs.com/package/ieee754) module and node's [buffer](https://nodejs.org/api/buffer.html). On an i7-2600k running node 6.9.1 it yields:
```
benchmarking writeFloat performance ...
float x 42,741,625 ops/sec ±1.75% (81 runs sampled)
float (fallback) x 11,272,532 ops/sec ±1.12% (85 runs sampled)
ieee754 x 8,653,337 ops/sec ±1.18% (84 runs sampled)
buffer x 12,412,414 ops/sec ±1.41% (83 runs sampled)
buffer (noAssert) x 13,471,149 ops/sec ±1.09% (84 runs sampled)
float was fastest
float (fallback) was 73.5% slower
ieee754 was 79.6% slower
buffer was 70.9% slower
buffer (noAssert) was 68.3% slower
benchmarking readFloat performance ...
float x 44,382,729 ops/sec ±1.70% (84 runs sampled)
float (fallback) x 20,925,938 ops/sec ±0.86% (87 runs sampled)
ieee754 x 17,189,009 ops/sec ±1.01% (87 runs sampled)
buffer x 10,518,437 ops/sec ±1.04% (83 runs sampled)
buffer (noAssert) x 11,031,636 ops/sec ±1.15% (87 runs sampled)
float was fastest
float (fallback) was 52.5% slower
ieee754 was 61.0% slower
buffer was 76.1% slower
buffer (noAssert) was 75.0% slower
benchmarking writeDouble performance ...
float x 38,624,906 ops/sec ±0.93% (83 runs sampled)
float (fallback) x 10,457,811 ops/sec ±1.54% (85 runs sampled)
ieee754 x 7,681,130 ops/sec ±1.11% (83 runs sampled)
buffer x 12,657,876 ops/sec ±1.03% (83 runs sampled)
buffer (noAssert) x 13,372,795 ops/sec ±0.84% (85 runs sampled)
float was fastest
float (fallback) was 73.1% slower
ieee754 was 80.1% slower
buffer was 67.3% slower
buffer (noAssert) was 65.3% slower
benchmarking readDouble performance ...
float x 40,527,888 ops/sec ±1.05% (84 runs sampled)
float (fallback) x 18,696,480 ops/sec ±0.84% (86 runs sampled)
ieee754 x 14,074,028 ops/sec ±1.04% (87 runs sampled)
buffer x 10,092,367 ops/sec ±1.15% (84 runs sampled)
buffer (noAssert) x 10,623,793 ops/sec ±0.96% (84 runs sampled)
float was fastest
float (fallback) was 53.8% slower
ieee754 was 65.3% slower
buffer was 75.1% slower
buffer (noAssert) was 73.8% slower
```
To run it yourself:
```
$> npm run bench
```
**License:** [BSD 3-Clause License](https://opensource.org/licenses/BSD-3-Clause)

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"use strict";
var float = require(".."),
ieee754 = require("ieee754"),
newSuite = require("./suite");
var F32 = Float32Array;
var F64 = Float64Array;
delete global.Float32Array;
delete global.Float64Array;
var floatFallback = float({});
global.Float32Array = F32;
global.Float64Array = F64;
var buf = new Buffer(8);
newSuite("writeFloat")
.add("float", function() {
float.writeFloatLE(0.1, buf, 0);
})
.add("float (fallback)", function() {
floatFallback.writeFloatLE(0.1, buf, 0);
})
.add("ieee754", function() {
ieee754.write(buf, 0.1, 0, true, 23, 4);
})
.add("buffer", function() {
buf.writeFloatLE(0.1, 0);
})
.add("buffer (noAssert)", function() {
buf.writeFloatLE(0.1, 0, true);
})
.run();
newSuite("readFloat")
.add("float", function() {
float.readFloatLE(buf, 0);
})
.add("float (fallback)", function() {
floatFallback.readFloatLE(buf, 0);
})
.add("ieee754", function() {
ieee754.read(buf, 0, true, 23, 4);
})
.add("buffer", function() {
buf.readFloatLE(0);
})
.add("buffer (noAssert)", function() {
buf.readFloatLE(0, true);
})
.run();
newSuite("writeDouble")
.add("float", function() {
float.writeDoubleLE(0.1, buf, 0);
})
.add("float (fallback)", function() {
floatFallback.writeDoubleLE(0.1, buf, 0);
})
.add("ieee754", function() {
ieee754.write(buf, 0.1, 0, true, 52, 8);
})
.add("buffer", function() {
buf.writeDoubleLE(0.1, 0);
})
.add("buffer (noAssert)", function() {
buf.writeDoubleLE(0.1, 0, true);
})
.run();
newSuite("readDouble")
.add("float", function() {
float.readDoubleLE(buf, 0);
})
.add("float (fallback)", function() {
floatFallback.readDoubleLE(buf, 0);
})
.add("ieee754", function() {
ieee754.read(buf, 0, true, 52, 8);
})
.add("buffer", function() {
buf.readDoubleLE(0);
})
.add("buffer (noAssert)", function() {
buf.readDoubleLE(0, true);
})
.run();

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"use strict";
module.exports = newSuite;
var benchmark = require("benchmark"),
chalk = require("chalk");
var padSize = 27;
function newSuite(name) {
var benches = [];
return new benchmark.Suite(name)
.on("add", function(event) {
benches.push(event.target);
})
.on("start", function() {
process.stdout.write("benchmarking " + name + " performance ...\n\n");
})
.on("cycle", function(event) {
process.stdout.write(String(event.target) + "\n");
})
.on("complete", function() {
if (benches.length > 1) {
var fastest = this.filter("fastest"), // eslint-disable-line no-invalid-this
fastestHz = getHz(fastest[0]);
process.stdout.write("\n" + chalk.white(pad(fastest[0].name, padSize)) + " was " + chalk.green("fastest") + "\n");
benches.forEach(function(bench) {
if (fastest.indexOf(bench) === 0)
return;
var hz = hz = getHz(bench);
var percent = (1 - hz / fastestHz) * 100;
process.stdout.write(chalk.white(pad(bench.name, padSize)) + " was " + chalk.red(percent.toFixed(1) + "% slower") + "\n");
});
}
process.stdout.write("\n");
});
}
function getHz(bench) {
return 1 / (bench.stats.mean + bench.stats.moe);
}
function pad(str, len, l) {
while (str.length < len)
str = l ? str + " " : " " + str;
return str;
}

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/**
* Writes a 32 bit float to a buffer using little endian byte order.
* @name writeFloatLE
* @function
* @param {number} val Value to write
* @param {Uint8Array} buf Target buffer
* @param {number} pos Target buffer offset
* @returns {undefined}
*/
export function writeFloatLE(val: number, buf: Uint8Array, pos: number): void;
/**
* Writes a 32 bit float to a buffer using big endian byte order.
* @name writeFloatBE
* @function
* @param {number} val Value to write
* @param {Uint8Array} buf Target buffer
* @param {number} pos Target buffer offset
* @returns {undefined}
*/
export function writeFloatBE(val: number, buf: Uint8Array, pos: number): void;
/**
* Reads a 32 bit float from a buffer using little endian byte order.
* @name readFloatLE
* @function
* @param {Uint8Array} buf Source buffer
* @param {number} pos Source buffer offset
* @returns {number} Value read
*/
export function readFloatLE(buf: Uint8Array, pos: number): number;
/**
* Reads a 32 bit float from a buffer using big endian byte order.
* @name readFloatBE
* @function
* @param {Uint8Array} buf Source buffer
* @param {number} pos Source buffer offset
* @returns {number} Value read
*/
export function readFloatBE(buf: Uint8Array, pos: number): number;
/**
* Writes a 64 bit double to a buffer using little endian byte order.
* @name writeDoubleLE
* @function
* @param {number} val Value to write
* @param {Uint8Array} buf Target buffer
* @param {number} pos Target buffer offset
* @returns {undefined}
*/
export function writeDoubleLE(val: number, buf: Uint8Array, pos: number): void;
/**
* Writes a 64 bit double to a buffer using big endian byte order.
* @name writeDoubleBE
* @function
* @param {number} val Value to write
* @param {Uint8Array} buf Target buffer
* @param {number} pos Target buffer offset
* @returns {undefined}
*/
export function writeDoubleBE(val: number, buf: Uint8Array, pos: number): void;
/**
* Reads a 64 bit double from a buffer using little endian byte order.
* @name readDoubleLE
* @function
* @param {Uint8Array} buf Source buffer
* @param {number} pos Source buffer offset
* @returns {number} Value read
*/
export function readDoubleLE(buf: Uint8Array, pos: number): number;
/**
* Reads a 64 bit double from a buffer using big endian byte order.
* @name readDoubleBE
* @function
* @param {Uint8Array} buf Source buffer
* @param {number} pos Source buffer offset
* @returns {number} Value read
*/
export function readDoubleBE(buf: Uint8Array, pos: number): number;

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"use strict";
module.exports = factory(factory);
/**
* Reads / writes floats / doubles from / to buffers.
* @name util.float
* @namespace
*/
/**
* Writes a 32 bit float to a buffer using little endian byte order.
* @name util.float.writeFloatLE
* @function
* @param {number} val Value to write
* @param {Uint8Array} buf Target buffer
* @param {number} pos Target buffer offset
* @returns {undefined}
*/
/**
* Writes a 32 bit float to a buffer using big endian byte order.
* @name util.float.writeFloatBE
* @function
* @param {number} val Value to write
* @param {Uint8Array} buf Target buffer
* @param {number} pos Target buffer offset
* @returns {undefined}
*/
/**
* Reads a 32 bit float from a buffer using little endian byte order.
* @name util.float.readFloatLE
* @function
* @param {Uint8Array} buf Source buffer
* @param {number} pos Source buffer offset
* @returns {number} Value read
*/
/**
* Reads a 32 bit float from a buffer using big endian byte order.
* @name util.float.readFloatBE
* @function
* @param {Uint8Array} buf Source buffer
* @param {number} pos Source buffer offset
* @returns {number} Value read
*/
/**
* Writes a 64 bit double to a buffer using little endian byte order.
* @name util.float.writeDoubleLE
* @function
* @param {number} val Value to write
* @param {Uint8Array} buf Target buffer
* @param {number} pos Target buffer offset
* @returns {undefined}
*/
/**
* Writes a 64 bit double to a buffer using big endian byte order.
* @name util.float.writeDoubleBE
* @function
* @param {number} val Value to write
* @param {Uint8Array} buf Target buffer
* @param {number} pos Target buffer offset
* @returns {undefined}
*/
/**
* Reads a 64 bit double from a buffer using little endian byte order.
* @name util.float.readDoubleLE
* @function
* @param {Uint8Array} buf Source buffer
* @param {number} pos Source buffer offset
* @returns {number} Value read
*/
/**
* Reads a 64 bit double from a buffer using big endian byte order.
* @name util.float.readDoubleBE
* @function
* @param {Uint8Array} buf Source buffer
* @param {number} pos Source buffer offset
* @returns {number} Value read
*/
// Factory function for the purpose of node-based testing in modified global environments
function factory(exports) {
// float: typed array
if (typeof Float32Array !== "undefined") (function() {
var f32 = new Float32Array([ -0 ]),
f8b = new Uint8Array(f32.buffer),
le = f8b[3] === 128;
function writeFloat_f32_cpy(val, buf, pos) {
f32[0] = val;
buf[pos ] = f8b[0];
buf[pos + 1] = f8b[1];
buf[pos + 2] = f8b[2];
buf[pos + 3] = f8b[3];
}
function writeFloat_f32_rev(val, buf, pos) {
f32[0] = val;
buf[pos ] = f8b[3];
buf[pos + 1] = f8b[2];
buf[pos + 2] = f8b[1];
buf[pos + 3] = f8b[0];
}
/* istanbul ignore next */
exports.writeFloatLE = le ? writeFloat_f32_cpy : writeFloat_f32_rev;
/* istanbul ignore next */
exports.writeFloatBE = le ? writeFloat_f32_rev : writeFloat_f32_cpy;
function readFloat_f32_cpy(buf, pos) {
f8b[0] = buf[pos ];
f8b[1] = buf[pos + 1];
f8b[2] = buf[pos + 2];
f8b[3] = buf[pos + 3];
return f32[0];
}
function readFloat_f32_rev(buf, pos) {
f8b[3] = buf[pos ];
f8b[2] = buf[pos + 1];
f8b[1] = buf[pos + 2];
f8b[0] = buf[pos + 3];
return f32[0];
}
/* istanbul ignore next */
exports.readFloatLE = le ? readFloat_f32_cpy : readFloat_f32_rev;
/* istanbul ignore next */
exports.readFloatBE = le ? readFloat_f32_rev : readFloat_f32_cpy;
// float: ieee754
})(); else (function() {
function writeFloat_ieee754(writeUint, val, buf, pos) {
var sign = val < 0 ? 1 : 0;
if (sign)
val = -val;
if (val === 0)
writeUint(1 / val > 0 ? /* positive */ 0 : /* negative 0 */ 2147483648, buf, pos);
else if (isNaN(val))
writeUint(2143289344, buf, pos);
else if (val > 3.4028234663852886e+38) // +-Infinity
writeUint((sign << 31 | 2139095040) >>> 0, buf, pos);
else if (val < 1.1754943508222875e-38) // denormal
writeUint((sign << 31 | Math.round(val / 1.401298464324817e-45)) >>> 0, buf, pos);
else {
var exponent = Math.floor(Math.log(val) / Math.LN2),
mantissa = Math.round(val * Math.pow(2, -exponent) * 8388608) & 8388607;
writeUint((sign << 31 | exponent + 127 << 23 | mantissa) >>> 0, buf, pos);
}
}
exports.writeFloatLE = writeFloat_ieee754.bind(null, writeUintLE);
exports.writeFloatBE = writeFloat_ieee754.bind(null, writeUintBE);
function readFloat_ieee754(readUint, buf, pos) {
var uint = readUint(buf, pos),
sign = (uint >> 31) * 2 + 1,
exponent = uint >>> 23 & 255,
mantissa = uint & 8388607;
return exponent === 255
? mantissa
? NaN
: sign * Infinity
: exponent === 0 // denormal
? sign * 1.401298464324817e-45 * mantissa
: sign * Math.pow(2, exponent - 150) * (mantissa + 8388608);
}
exports.readFloatLE = readFloat_ieee754.bind(null, readUintLE);
exports.readFloatBE = readFloat_ieee754.bind(null, readUintBE);
})();
// double: typed array
if (typeof Float64Array !== "undefined") (function() {
var f64 = new Float64Array([-0]),
f8b = new Uint8Array(f64.buffer),
le = f8b[7] === 128;
function writeDouble_f64_cpy(val, buf, pos) {
f64[0] = val;
buf[pos ] = f8b[0];
buf[pos + 1] = f8b[1];
buf[pos + 2] = f8b[2];
buf[pos + 3] = f8b[3];
buf[pos + 4] = f8b[4];
buf[pos + 5] = f8b[5];
buf[pos + 6] = f8b[6];
buf[pos + 7] = f8b[7];
}
function writeDouble_f64_rev(val, buf, pos) {
f64[0] = val;
buf[pos ] = f8b[7];
buf[pos + 1] = f8b[6];
buf[pos + 2] = f8b[5];
buf[pos + 3] = f8b[4];
buf[pos + 4] = f8b[3];
buf[pos + 5] = f8b[2];
buf[pos + 6] = f8b[1];
buf[pos + 7] = f8b[0];
}
/* istanbul ignore next */
exports.writeDoubleLE = le ? writeDouble_f64_cpy : writeDouble_f64_rev;
/* istanbul ignore next */
exports.writeDoubleBE = le ? writeDouble_f64_rev : writeDouble_f64_cpy;
function readDouble_f64_cpy(buf, pos) {
f8b[0] = buf[pos ];
f8b[1] = buf[pos + 1];
f8b[2] = buf[pos + 2];
f8b[3] = buf[pos + 3];
f8b[4] = buf[pos + 4];
f8b[5] = buf[pos + 5];
f8b[6] = buf[pos + 6];
f8b[7] = buf[pos + 7];
return f64[0];
}
function readDouble_f64_rev(buf, pos) {
f8b[7] = buf[pos ];
f8b[6] = buf[pos + 1];
f8b[5] = buf[pos + 2];
f8b[4] = buf[pos + 3];
f8b[3] = buf[pos + 4];
f8b[2] = buf[pos + 5];
f8b[1] = buf[pos + 6];
f8b[0] = buf[pos + 7];
return f64[0];
}
/* istanbul ignore next */
exports.readDoubleLE = le ? readDouble_f64_cpy : readDouble_f64_rev;
/* istanbul ignore next */
exports.readDoubleBE = le ? readDouble_f64_rev : readDouble_f64_cpy;
// double: ieee754
})(); else (function() {
function writeDouble_ieee754(writeUint, off0, off1, val, buf, pos) {
var sign = val < 0 ? 1 : 0;
if (sign)
val = -val;
if (val === 0) {
writeUint(0, buf, pos + off0);
writeUint(1 / val > 0 ? /* positive */ 0 : /* negative 0 */ 2147483648, buf, pos + off1);
} else if (isNaN(val)) {
writeUint(0, buf, pos + off0);
writeUint(2146959360, buf, pos + off1);
} else if (val > 1.7976931348623157e+308) { // +-Infinity
writeUint(0, buf, pos + off0);
writeUint((sign << 31 | 2146435072) >>> 0, buf, pos + off1);
} else {
var mantissa;
if (val < 2.2250738585072014e-308) { // denormal
mantissa = val / 5e-324;
writeUint(mantissa >>> 0, buf, pos + off0);
writeUint((sign << 31 | mantissa / 4294967296) >>> 0, buf, pos + off1);
} else {
var exponent = Math.floor(Math.log(val) / Math.LN2);
if (exponent === 1024)
exponent = 1023;
mantissa = val * Math.pow(2, -exponent);
writeUint(mantissa * 4503599627370496 >>> 0, buf, pos + off0);
writeUint((sign << 31 | exponent + 1023 << 20 | mantissa * 1048576 & 1048575) >>> 0, buf, pos + off1);
}
}
}
exports.writeDoubleLE = writeDouble_ieee754.bind(null, writeUintLE, 0, 4);
exports.writeDoubleBE = writeDouble_ieee754.bind(null, writeUintBE, 4, 0);
function readDouble_ieee754(readUint, off0, off1, buf, pos) {
var lo = readUint(buf, pos + off0),
hi = readUint(buf, pos + off1);
var sign = (hi >> 31) * 2 + 1,
exponent = hi >>> 20 & 2047,
mantissa = 4294967296 * (hi & 1048575) + lo;
return exponent === 2047
? mantissa
? NaN
: sign * Infinity
: exponent === 0 // denormal
? sign * 5e-324 * mantissa
: sign * Math.pow(2, exponent - 1075) * (mantissa + 4503599627370496);
}
exports.readDoubleLE = readDouble_ieee754.bind(null, readUintLE, 0, 4);
exports.readDoubleBE = readDouble_ieee754.bind(null, readUintBE, 4, 0);
})();
return exports;
}
// uint helpers
function writeUintLE(val, buf, pos) {
buf[pos ] = val & 255;
buf[pos + 1] = val >>> 8 & 255;
buf[pos + 2] = val >>> 16 & 255;
buf[pos + 3] = val >>> 24;
}
function writeUintBE(val, buf, pos) {
buf[pos ] = val >>> 24;
buf[pos + 1] = val >>> 16 & 255;
buf[pos + 2] = val >>> 8 & 255;
buf[pos + 3] = val & 255;
}
function readUintLE(buf, pos) {
return (buf[pos ]
| buf[pos + 1] << 8
| buf[pos + 2] << 16
| buf[pos + 3] << 24) >>> 0;
}
function readUintBE(buf, pos) {
return (buf[pos ] << 24
| buf[pos + 1] << 16
| buf[pos + 2] << 8
| buf[pos + 3]) >>> 0;
}

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{
"_args": [
[
"@protobufjs/float@1.0.2",
"C:\\Users\\matia\\Musix"
]
],
"_from": "@protobufjs/float@1.0.2",
"_id": "@protobufjs/float@1.0.2",
"_inBundle": false,
"_integrity": "sha1-Xp4avctz/Ap8uLKR33jIy9l7h9E=",
"_location": "/@protobufjs/float",
"_phantomChildren": {},
"_requested": {
"type": "version",
"registry": true,
"raw": "@protobufjs/float@1.0.2",
"name": "@protobufjs/float",
"escapedName": "@protobufjs%2ffloat",
"scope": "@protobufjs",
"rawSpec": "1.0.2",
"saveSpec": null,
"fetchSpec": "1.0.2"
},
"_requiredBy": [
"/protobufjs"
],
"_resolved": "https://registry.npmjs.org/@protobufjs/float/-/float-1.0.2.tgz",
"_spec": "1.0.2",
"_where": "C:\\Users\\matia\\Musix",
"author": {
"name": "Daniel Wirtz",
"email": "dcode+protobufjs@dcode.io"
},
"bugs": {
"url": "https://github.com/dcodeIO/protobuf.js/issues"
},
"dependencies": {},
"description": "Reads / writes floats / doubles from / to buffers in both modern and ancient browsers.",
"devDependencies": {
"benchmark": "^2.1.4",
"chalk": "^1.1.3",
"ieee754": "^1.1.8",
"istanbul": "^0.4.5",
"tape": "^4.6.3"
},
"homepage": "https://github.com/dcodeIO/protobuf.js#readme",
"license": "BSD-3-Clause",
"main": "index.js",
"name": "@protobufjs/float",
"repository": {
"type": "git",
"url": "git+https://github.com/dcodeIO/protobuf.js.git"
},
"scripts": {
"bench": "node bench",
"coverage": "istanbul cover node_modules/tape/bin/tape tests/*.js",
"test": "tape tests/*.js"
},
"types": "index.d.ts",
"version": "1.0.2"
}

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node_modules/@protobufjs/float/tests/index.js generated vendored Normal file
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var tape = require("tape");
var float = require("..");
tape.test("float", function(test) {
// default
test.test(test.name + " - typed array", function(test) {
runTest(float, test);
});
// ieee754
test.test(test.name + " - fallback", function(test) {
var F32 = global.Float32Array,
F64 = global.Float64Array;
delete global.Float32Array;
delete global.Float64Array;
runTest(float({}), test);
global.Float32Array = F32;
global.Float64Array = F64;
});
});
function runTest(float, test) {
var common = [
0,
-0,
Infinity,
-Infinity,
0.125,
1024.5,
-4096.5,
NaN
];
test.test(test.name + " - using 32 bits", function(test) {
common.concat([
3.4028234663852886e+38,
1.1754943508222875e-38,
1.1754946310819804e-39
])
.forEach(function(value) {
var strval = value === 0 && 1 / value < 0 ? "-0" : value.toString();
test.ok(
checkValue(value, 4, float.readFloatLE, float.writeFloatLE, Buffer.prototype.writeFloatLE),
"should write and read back " + strval + " (32 bit LE)"
);
test.ok(
checkValue(value, 4, float.readFloatBE, float.writeFloatBE, Buffer.prototype.writeFloatBE),
"should write and read back " + strval + " (32 bit BE)"
);
});
test.end();
});
test.test(test.name + " - using 64 bits", function(test) {
common.concat([
1.7976931348623157e+308,
2.2250738585072014e-308,
2.2250738585072014e-309
])
.forEach(function(value) {
var strval = value === 0 && 1 / value < 0 ? "-0" : value.toString();
test.ok(
checkValue(value, 8, float.readDoubleLE, float.writeDoubleLE, Buffer.prototype.writeDoubleLE),
"should write and read back " + strval + " (64 bit LE)"
);
test.ok(
checkValue(value, 8, float.readDoubleBE, float.writeDoubleBE, Buffer.prototype.writeDoubleBE),
"should write and read back " + strval + " (64 bit BE)"
);
});
test.end();
});
test.end();
}
function checkValue(value, size, read, write, write_comp) {
var buffer = new Buffer(size);
write(value, buffer, 0);
var value_comp = read(buffer, 0);
var strval = value === 0 && 1 / value < 0 ? "-0" : value.toString();
if (value !== value) {
if (value_comp === value_comp)
return false;
} else if (value_comp !== value)
return false;
var buffer_comp = new Buffer(size);
write_comp.call(buffer_comp, value, 0);
for (var i = 0; i < size; ++i)
if (buffer[i] !== buffer_comp[i]) {
console.error(">", buffer, buffer_comp);
return false;
}
return true;
}