ByteParser (xbytes)

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

Installing

Via NPM:

1npm install xbytes

Usage

1// Node CommonJS
2const xbytes = require('xbytes');
3// Or Node ES6 Modules
4import xbytes from 'xbytes';
5// Or TypeScript
6import * as xbytes from 'xbytes';

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

Examples

1xbytes(4747); // '4.75 KB'
2xbytes(-3946); // '-3.95 KB'
3xbytes(34.724e+4); // '347.24 KB'
4xbytes(32000000000); // '32.00 GB'
5xbytes(21474836480, {iec: true}); // '20.00 GiB'
6xbytes.parseSize('10 GB'); // 10000000
7xbytes.parseSize('-50 GiB'); // -53687091200

IEC Specification*

1xbytes(5242880, {iec: true}); // '5 MiB'
2
3xbytes.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.

1xbytes(2472946)
2// << '2.47 MB'
3xbytes(49392123904, {iec: true})
4// << '46.00 GiB'

xbytes.parseSize(str[, config])

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

Parse human readable size to bytes

1xbytes.parseSize('15.967 MB')
2// << 15967000
3xbytes.parseSize('5.97 PiB')
4// << 6721622443850465

xbytes.parse(size)

• str: <HybridByte>
• Returns: <ByteUnitObject>

Create a ByteUnitObject around the specified HybridByte

1xbytes.parse('10 MiB')
2// << ByteUnitObject { bytes: 10485760 }
3xbytes.parse('10 MiB').add('20 MiB')
4// << ByteUnitObject { bytes: 31457280 }
5xbytes.parse('10 MiB').add('20 MiB').toIECBytes()
6// << '30.00 MiB'

xbytes.isBytes(str)

• str: <string>
• Returns: <boolean>

Check if the provided string is a ByteString

1xbytes.isBytes('10 MiB')
2// << true
3xbytes.isBytes('Hello')
4// << false
5xbytes.isBytes('10 iB')
6// << false
7xbytes.isBytes('10b')
8// << true

xbytes.isUnit(str)

• str: <UnitString>
• Returns: <boolean>

Check if the provided string is an UnitString

1xbytes.isUnit('GB')
2// << true
3xbytes.isUnit('giB')
4// << true
5xbytes.isUnit('iB')
6// << false
7xbytes.isUnit('BB')
8// << 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

Index	Prefix	Decimal Bits	Binary Bits (IEC)	Decimal Bytes	Binary Bytes (IEC)
0	-	b (Bits)	b (Bits)	b (Bits)	b (Bits)
0	-	B (Bytes)	B (Bytes)	B (Bytes)	B (Bytes)
1	K	Kb (KiloBits)	Kib (KiloBits)	KB (KiloBytes)	KiB (KibiBytes)
2	M	Mb (MegaBits)	Mib (MebiBits)	MB (MegaBytes)	MiB (MebiBytes)
3	G	Gb (GigaBits)	Gib (GibiBits)	GB (GigaBytes)	GiB (GibiBytes)
4	T	Tb (TeraBits)	Tib (TebiBits)	TB (TeraBytes)	TiB (TebiBytes)
5	P	Pb (PetaBits)	Pib (PebiBits)	PB (PetaBytes)	PiB (PebiBytes)
6	E	Eb (ExaBits)	Eib (ExbiBits)	EB (ExaBytes)	EiB (ExbiBytes)
7	Z	Zb (ZettaBits)	Zib (ZebiBits)	ZB (ZettaBytes)	ZiB (ZebiBytes)
8	Y	Yb (YottaBits)	Yib (YobiBits)	YB (YottaBytes)	YiB (YobiBytes)

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.

1new ByteUnitObject('10 MiB')
2// << ByteUnitObject { bytes: 10485760 }
3new ByteUnitObject('10 MiB').add('20 MiB')
4// << ByteUnitObject { bytes: 31457280 }
5new ByteUnitObject('10 MiB').add('20 MiB').toIECBytes()
6// << '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.

1new ByteUnitObject('10 MiB')
2// >> ByteUnitObject { bytes: 10485760 }
3new ByteUnitObject('10 MiB').convertTo('MB')
4// >> '10.49 MB'
5new ByteUnitObject('10 MiB').add('50 MB').convertTo('KB')
6    '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

1$ node examples/index.js 'Hey, its 6GB, but my 8 TB flash drive is better'
2┌─────────┬──────────┬───────────┬────────┬───────────┬────────────┬────────────┬─────────────┐
3│ (index) │  parsed  │   size    │  raw   │   bytes   │  iecBytes  │    bits    │   iecBits   │
4├─────────┼──────────┼───────────┼────────┼───────────┼────────────┼────────────┼─────────────┤
5│    0    │ [Object] │ '6.00 GB' │ '6GB'  │ '6.00 GB' │ '5.59 GiB' │ '48.00 Gb' │ '44.70 Gib' │
6│    1    │ [Object] │ '8.00 TB' │ '8 TB' │ '8.00 TB' │ '7.28 TiB' │ '64.00 Tb' │ '58.21 Tib' │
7└─────────┴──────────┴───────────┴────────┴───────────┴────────────┴────────────┴─────────────┘
8$ node examples/parse.js 'The 10GB file was downloaded in 50MB/s'
9The 10737418240 file was downloaded in 52428800/s
10$ node examples/relative.js mb '10GiB, 1mb 6   gb'
1185899.35 Mb, 1.00 Mb 6000.00 Mb
12$ node examples/random.js 10 // Parse 10 random bytes
13[tabular data]
14$ node examples/extract.js 'Hey, its 6GB, but my 8 TB flash drive is better'
15┌─────────┬────────┬───────────────┐
16│ (index) │  size  │     bytes     │
17├─────────┼────────┼───────────────┤
18│    0    │ '6GB'  │  6000000000   │
19│    1    │ '8 TB' │ 8000000000000 │
20└─────────┴────────┴───────────────┘

Features

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

1$ nvm exec v1.8.4 node -pe 'require(".")(3748587)'
2"3.75 MB"
3$ nvm exec v5.12.0 node -pe 'require(".").parseSize("476 TiB")'
4523367534821376
5$ nvm exec v11.10.0 node -e '
6  let xbytes = require("./dist");
7  let str = "My 10GB drive transmits at 250MiB/sec"
8  console.log(str.replace(xbytes.globalByteFilter, xbytes.relative.bits))
9'
10"My 80.00 Gb drive transmits at 2.10 Gb/sec"

Decimal parsing

1xbytes(524334545.847775856); // 524.33 MB
2xbytes.parseSize('665.284 TiB'); // 731487493773328.4
3
4xbytes(.24283884748955); // 0.24 B
5xbytes.parseSize('.295 MB'); // 295000

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

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

Parse byte values to extended human readable sizes

1xbytes(50000000, {short: false}); // '50.00 MegaBytes'

Match or extract ByteStrings in a string

1let data = 'My 16GB flash drive has a 4GB Zip Archive and a 5MB JavaScript file';
2xbytes.extractBytes(data);
3  //> [ '16GB', '4GB', '5MB' ]
4data.match(xbytes.globalByteFilter)
5  //> [ '16GB', '4GB', '5MB' ]
6data.replace(xbytes.globalByteFilter, xbytes.parseSize)
7  //> 'My 16000000000 flash drive has a 4000000000 Zip Archive and a 5000000 JavaScript file'
8data.replace(xbytes.globalByteFilter, xbytes.createSizeParser({ iec: false }))
9  //> 'My 17179869184 flash drive has a 4294967296 Zip Archive and a 5242880 JavaScript file'

Decimal and Binary Unit Relativity

1import { parseSize, relative } from 'xbytes';
2
3relative('35 TiB').bits // '307.86 Tb'
4relative('35 TiB').bytes // '38.48 TB'
5relative('35 TiB').iecBits // '280.00 Tib'
6relative('35 TiB').iecBytes // '35.00 TiB'
7
8parseSize(relative('35 TiB', {fixed: 20}).bits);
9  //> 38482906972160
10parseSize(relative('35 TiB', {fixed: 20}).bytes);
11  //> 38482906972160
12parseSize(relative('35 TiB', {fixed: 20}).iecBits);
13  //> 38482906972160
14parseSize(relative('35 TiB', {fixed: 20}).iecBytes);
15  //> 38482906972160

Development

Building

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

1git clone https://github.com/miraclx/xbytes.git
2cd xbytes
3npm install
4# hack on code
5npm run build
6npm 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:

1npm install
2npm run build
3npm test

License

Apache 2.0 © Miraculous Owonubi (@miraclx) <omiraculous@gmail.com>