@arcblock/xbytes

v1.9.1

Published

2 months ago

Parse bytes to human readable sizes (4747) → ('4.75 KB') and vice versa.

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convert size bytes bits parser iec binary decimal human humanized data filesize file readable utility convert converter pretty

ByteParser (xbytes)

NodeJS Byte Parser Parse bytes to human readable sizes (4747) → ('4.75 KB') and vice versa.

Installing

Via NPM:

npm install xbytes

Usage

// Node CommonJS
const xbytes = require('xbytes');
// Or Node ES6 Modules
import xbytes from 'xbytes';
// Or TypeScript
import * as xbytes from 'xbytes';

<!-- Or in the Browser -->
<script src="xbytes/dist/index.js"></script>

Examples

xbytes(4747); // '4.75 KB'
xbytes(-3946); // '-3.95 KB'
xbytes(34.724e+4); // '347.24 KB'
xbytes(32000000000); // '32.00 GB'
xbytes(21474836480, {iec: true}); // '20.00 GiB'
xbytes.parseSize('10 GB'); // 10000000
xbytes.parseSize('-50 GiB'); // -53687091200

IEC Specification*

xbytes(5242880, {iec: true}); // '5 MiB'

xbytes.parseSize('10 GiB'); // 10485760

API

xbytes(byte[, options])

byte: <number>
options: <ByteOptions>
Returns: <ByteString>

Parse byte to human readable size. If byte is not a number or an number-like string, return null appropriately.

xbytes(2472946)
// << '2.47 MB'
xbytes(49392123904, {iec: true})
// << '46.00 GiB'

xbytes.parseSize(str[, config])

str: <ByteString>
config: <ParseOptions>
Returns: <number>

Parse human readable size to bytes

xbytes.parseSize('15.967 MB')
// << 15967000
xbytes.parseSize('5.97 PiB')
// << 6721622443850465

xbytes.parse(size)

str: <HybridByte>
Returns: <ByteUnitObject>

Create a ByteUnitObject around the specified HybridByte

xbytes.parse('10 MiB')
// << ByteUnitObject { bytes: 10485760 }
xbytes.parse('10 MiB').add('20 MiB')
// << ByteUnitObject { bytes: 31457280 }
xbytes.parse('10 MiB').add('20 MiB').toIECBytes()
// << '30.00 MiB'

xbytes.isBytes(str)

str: <string>
Returns: <boolean>

Check if the provided string is a ByteString

xbytes.isBytes('10 MiB')
// << true
xbytes.isBytes('Hello')
// << false
xbytes.isBytes('10 iB')
// << false
xbytes.isBytes('10b')
// << true

xbytes.isUnit(str)

str: <UnitString>
Returns: <boolean>

Check if the provided string is an UnitString

xbytes.isUnit('GB')
// << true
xbytes.isUnit('giB')
// << true
xbytes.isUnit('iB')
// << false
xbytes.isUnit('BB')
// << false

xbytes.isParsable(input)

input: <HybridByte>
Returns: <boolean>

Check if the provided argument is parsable i.e raw_bytes (number) or ByteString.

xbytes.relative(size[, options])

size: <HybridByte>
options: <ByteOptions>
Returns: <HybridByteRelations>

xbytes.relative.bits(size[, options])

size: <HybridByte>
options: <ByteOptions>
Returns: <ByteString>

Show the input size in relation to its bit format

xbytes.relative.bytes(size[, options])

size: <HybridByte>
options: <ByteOptions>
Returns: <ByteString>

Show the input size in relation to its byte format

xbytes.relative.iecBits(size[, options])

size: <HybridByte>
options: <ByteOptions>
Returns: <ByteString>

Show the input size in relation to its bit format under IEC Standards

xbytes.relative.iecBytes(size[, options])

size: <HybridByte>
options: <ByteOptions>
Returns: <ByteString>

Show the input size in relation to its bytes format under IEC Standards

xbytes.relative.size(size[, unit[, options]])

size: <HybridByte>
unit: <UnitString>
options: <ByteOptions>
Returns: <ByteString>

xbytes.parseString(str)

str: <ByteString>
Returns: <ParsedByteString>

Parse a human readable byte into its components

xbytes.parseBytes(str, options)

str: <HybridByte>
options: <ByteOptions>
Returns: <ParsedBytes>

Parse a human readable byte into its components. Extended from parseString(), but with a few extra properties. And flexibility to use parse either an integer byte value or a ByteString resulting in the same object.

xbytes.extractBytes(str)

str: <string>
Returns: <ByteString[]>

Extract all ByteStrings within a string into an array, alternative to str.match(xbytes.byteFilter)

xbytes.createByteParser(config)

config: <ByteOptions>
Returns: <ByteParser>

Construct a static ByteParser with predefined configurations

xbytes.createSizeParser(config)

config: <ParseOptions>
Returns: <SizeParser>

Construct a static SizeParser with predefined configurations

xbytes.createRelativeSizer(unit[, config])

unit: <UnitString>
config: <ByteOptions>
Returns: <RelativeSizer>

Create a RelativeSizer for converting a hybrid byte into any set unit under predefined configuration

xbytes.unitMatcher: `RegExp`

The raw Regular expression used in scanning all string byte units.

xbytes.genericMatcher: `RegExp`

The raw regular expression used in scanning all byte containing strings.

xbytes.byteFilter: `RegExp`

An regular expression extension of genericMatcher with the 'i' flag.

xbytes.globalByteFilter: `RegExp`

An regular expression extension of genericMatcher with the 'gi' flags.

UnitString: `String`

Supported Unit Strings

ByteString: `String`

A stringed byte representation. The result of a parsed byte value.

'5 MB'
'10 GiB'
'0.67 Tb'
'-50 KB'
'2e+15 KB'
'-9e-4 GB'

HybridByte: `Number`|`ByteString`

Used to identify a variable thats either a ByteString or a number

'47 MiB'
'50kb'
74753
'105'

ByteOptions: `Object`

iec: <boolean> Whether or not to parse under the IEC standard i.e in terms of 1024. Default: true
bits: <boolean> Whether or not to convert inputed bytes to bits and parse in terms of bits [1 byte = 8 bits]. Default: false.
fixed: <number> Number of digits to include after decimal point. Default: 2.
short: <boolean> Whether or not to shorten unit String [short: 'MB', long: 'MegaBytes']. Default: true.
space: <boolean> Whether or not to include a white space inbetween value and unit. Default: true.
sticky: <boolean> Whether or not to retain unit on max unit values. e.g '1024.00 GiB' instead of '1.00 TiB'. Default: false.
prefixIndex: <number> The index of unit relativity [See UnitString].

ParseOptions: `Object`

iec: <boolean> Whether or not to enforce compliance to IEC standards. Default: true.
bits: <boolean> Whether or not to parse a lower case 'b' in bit format. Default: true.

ByteParser: `Function`

size: <number>
Returns: <ByteString>

Byte parser with predefined configuration. Result of createByteParser.

SizeParser: `Function`

str: <ByteString[]>
Returns: <number>

ByteString parser with predefined configuration. Result of createSizeParser.

RelativeSizer: `Function`

size: <HybridByte>
Returns: <ByteString>

HybridByte parser with predefined configuration. Result of createRelativeSizer.

ParsedUnit: `Object`

iec: <boolean> Whether or not the byte is represented under the IEC standard i.e in terms of 1024.
- true in '7 TiB'
- false in '3 TB'
type: <string> Whether the size is represented as bits(b) or bytes(B).
- 'b' in '499Yb'
- 'B' in '7 MB'
bits: <boolean> Whether or not the size is specifically represented as a bit.
- true in 84 Yb
- false in 278.58 KB
bytes: <boolean> Whether or not the size is specifically represented as a byte.
- true in 92 EB
- false in 28 Mb
unit: <UnitString> Re-parsed UnitString of inputUnit, fixing formatting.
- 'TB' if 'TB'
- 'Gib' if 'gib'
inputUnit: <UnitString> The unparsed String as was provided.
- '47TB' in '47TB'
prefix: <string> The prefix of the size string.
- 'K' in 'KB'
prefixIndex: <number> The index of the size unit [See UnitString].
- 3 in 'GB'

ParsedByteString `extends` ParsedUnit: `Object`

input: <ByteString> The unparsed String as was provided.
- '47TB' in '47TB'
value: <number> The value for the size.
- 83 in '83MB'

ParsedBytes `extends` ParsedByteString: `Object`

input: <HybridByte> The unparsed String as was provided.
- 1024 in 1024
- '47TB' in '47TB'
size: <ByteString> The value for the size.
- 83 in '83MB'
bytes: <number> The value for the size.
- 10485760 from '10 MiB'

class ByteUnitObject

bytes: <number> Internal byte value.

Wrap a HybridByte in a chainable, transformative object.

new ByteUnitObject('10 MiB')
// << ByteUnitObject { bytes: 10485760 }
new ByteUnitObject('10 MiB').add('20 MiB')
// << ByteUnitObject { bytes: 31457280 }
new ByteUnitObject('10 MiB').add('20 MiB').toIECBytes()
// << '30.00 MiB'

ByteUnitObject().add(bytes)

bytes: <HybridByte|HybridByte[]> Byte(s) to subract from the root byte.
Returns: <ByteUnitObject>

Add byte(s) to the internal bytes, resulting in a new ByteUnitObject object with the value

ByteUnitObject().subtract(bytes)

bytes: <HybridByte|HybridByte[]> Subtract byte(s) from the internal bytes, resulting in a new ByteUnitObject object with the value.
Returns: <ByteUnitObject>

Subtract byte(s) from the internal bytes, resulting in a new ByteUnitObject object with the value

ByteUnitObject().multiply(bytes)

bytes: <HybridByte|HybridByte[]> Multiply byte(s) with the internal bytes, resulting in a new ByteUnitObject object with the value.
Returns: <ByteUnitObject>

Multiply byte(s) with the internal bytes, resulting in a new ByteUnitObject object with the value

ByteUnitObject().divide(bytes)

bytes: <HybridByte|HybridByte[]> Byte(s) to divide with.
Returns: <ByteUnitObject>

Divide internal bytes by byte(s) specified, resulting in a new ByteUnitObject object with the value

ByteUnitObject().convertTo(unit)

unit: <UnitString>
Returns: <ByteString>

Parse the internal byte into any unit, following the relativity.

new ByteUnitObject('10 MiB')
// >> ByteUnitObject { bytes: 10485760 }
new ByteUnitObject('10 MiB').convertTo('MB')
// >> '10.49 MB'
new ByteUnitObject('10 MiB').add('50 MB').convertTo('KB')
    '60485.76 KB'

ByteUnitObject().objectify(opts)

opts: <ByteOptions>

Parse the internal bytes property to a byte object.

ByteUnitObject().checkInternalByteVal(bytes)

Method to check integrity of internal bytes. Throw if there's an error somewhere.

HybridByteRelations: `Object`

raw: <HybridByte> The unparsed data
bits: <ByteString> A relative bit parsing of the input HybridByte
size: <number> The numeric byte format of the input HybridByte
bytes: <ByteString> A relative byte parsing of the input HybridByte
iecBits: <ByteString> A relative bit parsing of the input HybridByte under the IEC Specification
parsed: <ByteString> A relative bit parsing of the input HybridByte under the IEC Specification
iecBytes: <ByteString> A relative byte parsing of the input HybridByte under the IEC Specification

More Examples

Check out some examples in the examples folder

$ node examples/index.js 'Hey, its 6GB, but my 8 TB flash drive is better'
┌─────────┬──────────┬───────────┬────────┬───────────┬────────────┬────────────┬─────────────┐
│ (index) │  parsed  │   size    │  raw   │   bytes   │  iecBytes  │    bits    │   iecBits   │
├─────────┼──────────┼───────────┼────────┼───────────┼────────────┼────────────┼─────────────┤
│    0    │ [Object] │ '6.00 GB' │ '6GB'  │ '6.00 GB' │ '5.59 GiB' │ '48.00 Gb' │ '44.70 Gib' │
│    1    │ [Object] │ '8.00 TB' │ '8 TB' │ '8.00 TB' │ '7.28 TiB' │ '64.00 Tb' │ '58.21 Tib' │
└─────────┴──────────┴───────────┴────────┴───────────┴────────────┴────────────┴─────────────┘
$ node examples/parse.js 'The 10GB file was downloaded in 50MB/s'
The 10737418240 file was downloaded in 52428800/s
$ node examples/relative.js mb '10GiB, 1mb 6   gb'
85899.35 Mb, 1.00 Mb 6000.00 Mb
$ node examples/random.js 10 // Parse 10 random bytes
[tabular data]
$ node examples/extract.js 'Hey, its 6GB, but my 8 TB flash drive is better'
┌─────────┬────────┬───────────────┐
│ (index) │  size  │     bytes     │
├─────────┼────────┼───────────────┤
│    0    │ '6GB'  │  6000000000   │
│    1    │ '8 TB' │ 8000000000000 │
└─────────┴────────┴───────────────┘

Features

Compatible with all versions of NodeJS (tested from v1.8.4)

$ nvm exec v1.8.4 node -pe 'require(".")(3748587)'
"3.75 MB"
$ nvm exec v5.12.0 node -pe 'require(".").parseSize("476 TiB")'
523367534821376
$ nvm exec v11.10.0 node -e '
  let xbytes = require("./dist");
  let str = "My 10GB drive transmits at 250MiB/sec"
  console.log(str.replace(xbytes.globalByteFilter, xbytes.relative.bits))
'
"My 80.00 Gb drive transmits at 2.10 Gb/sec"

Decimal parsing

xbytes(524334545.847775856); // 524.33 MB
xbytes.parseSize('665.284 TiB'); // 731487493773328.4

xbytes(.24283884748955); // 0.24 B
xbytes.parseSize('.295 MB'); // 295000

Parse human readable sizes in binary (IEC) format to bytes

xbytes.parseSize('1 MiB'); // 1048576

Parse byte values to extended human readable sizes

xbytes(50000000, {short: false}); // '50.00 MegaBytes'

Match or extract ByteStrings in a string

let data = 'My 16GB flash drive has a 4GB Zip Archive and a 5MB JavaScript file';
xbytes.extractBytes(data);
  //> [ '16GB', '4GB', '5MB' ]
data.match(xbytes.globalByteFilter)
  //> [ '16GB', '4GB', '5MB' ]
data.replace(xbytes.globalByteFilter, xbytes.parseSize)
  //> 'My 16000000000 flash drive has a 4000000000 Zip Archive and a 5000000 JavaScript file'
data.replace(xbytes.globalByteFilter, xbytes.createSizeParser({ iec: false }))
  //> 'My 17179869184 flash drive has a 4294967296 Zip Archive and a 5242880 JavaScript file'

Decimal and Binary Unit Relativity

import { parseSize, relative } from 'xbytes';

relative('35 TiB').bits // '307.86 Tb'
relative('35 TiB').bytes // '38.48 TB'
relative('35 TiB').iecBits // '280.00 Tib'
relative('35 TiB').iecBytes // '35.00 TiB'

parseSize(relative('35 TiB', {fixed: 20}).bits);
  //> 38482906972160
parseSize(relative('35 TiB', {fixed: 20}).bytes);
  //> 38482906972160
parseSize(relative('35 TiB', {fixed: 20}).iecBits);
  //> 38482906972160
parseSize(relative('35 TiB', {fixed: 20}).iecBytes);
  //> 38482906972160

Development

Building

Feel free to clone, use in adherance to the license and perhaps send pull requests

git clone https://github.com/miraclx/xbytes.git
cd xbytes
npm install
# hack on code
npm run build
npm test

Testing

Tests are executed with Jest. To use it, simple run npm install, it will install Jest and its dependencies in your project's node_modules directory followed by npm run build and finally npm test.

To run the tests:

npm install
npm run build
npm test