units

package
Version: v0.5.6 Latest Latest
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Published: Jan 15, 2016 License: Apache-2.0, CC-BY-SA-4.0, Apache-2.0 Imports: 5 Imported by: 0

README

GoDoc

Introduction

go-units is a library to transform human friendly measurements into machine friendly values.

Usage

See the docs in godoc for examples and documentation.

Copyright © 2015 Docker, Inc. All rights reserved, except as follows. Code is released under the Apache 2.0 license. The README.md file, and files in the "docs" folder are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file "LICENSE.docs". You may obtain a duplicate copy of the same license, titled CC-BY-SA-4.0, at http://creativecommons.org/licenses/by/4.0/.

Documentation

Overview

Package units provides helper function to parse and print size and time units in human-readable format.

Index

Examples

Constants

View Source
const (
	KB = 1000
	MB = 1000 * KB
	GB = 1000 * MB
	TB = 1000 * GB
	PB = 1000 * TB

	KiB = 1024
	MiB = 1024 * KiB
	GiB = 1024 * MiB
	TiB = 1024 * GiB
	PiB = 1024 * TiB
)

See: http://en.wikipedia.org/wiki/Binary_prefix

Variables

This section is empty.

Functions

func BytesSize

func BytesSize(size float64) string

BytesSize returns a human-readable size in bytes, kibibytes, mebibytes, gibibytes, or tebibytes (eg. "44kiB", "17MiB").

Example
fmt.Println(BytesSize(1024))
fmt.Println(BytesSize(1024 * 1024))
fmt.Println(BytesSize(1048576))
fmt.Println(BytesSize(2 * MiB))
fmt.Println(BytesSize(3.42 * GiB))
fmt.Println(BytesSize(5.372 * TiB))
fmt.Println(BytesSize(2.22 * PiB))
Output:

func CustomSize

func CustomSize(format string, size float64, base float64, _map []string) string

CustomSize returns a human-readable approximation of a size using custom format.

func FromHumanSize

func FromHumanSize(size string) (int64, error)

FromHumanSize returns an integer from a human-readable specification of a size using SI standard (eg. "44kB", "17MB").

Example
fmt.Println(FromHumanSize("32"))
fmt.Println(FromHumanSize("32b"))
fmt.Println(FromHumanSize("32B"))
fmt.Println(FromHumanSize("32k"))
fmt.Println(FromHumanSize("32K"))
fmt.Println(FromHumanSize("32kb"))
fmt.Println(FromHumanSize("32Kb"))
fmt.Println(FromHumanSize("32Mb"))
fmt.Println(FromHumanSize("32Gb"))
fmt.Println(FromHumanSize("32Tb"))
fmt.Println(FromHumanSize("32Pb"))
Output:

func HumanDuration

func HumanDuration(d time.Duration) string

HumanDuration returns a human-readable approximation of a duration (eg. "About a minute", "4 hours ago", etc.).

Example
fmt.Println(HumanDuration(450 * time.Millisecond))
fmt.Println(HumanDuration(47 * time.Second))
fmt.Println(HumanDuration(1 * time.Minute))
fmt.Println(HumanDuration(3 * time.Minute))
fmt.Println(HumanDuration(35 * time.Minute))
fmt.Println(HumanDuration(35*time.Minute + 40*time.Second))
fmt.Println(HumanDuration(1 * time.Hour))
fmt.Println(HumanDuration(1*time.Hour + 45*time.Minute))
fmt.Println(HumanDuration(3 * time.Hour))
fmt.Println(HumanDuration(3*time.Hour + 59*time.Minute))
fmt.Println(HumanDuration(3*time.Hour + 60*time.Minute))
fmt.Println(HumanDuration(24 * time.Hour))
fmt.Println(HumanDuration(24*time.Hour + 12*time.Hour))
fmt.Println(HumanDuration(2 * 24 * time.Hour))
fmt.Println(HumanDuration(7 * 24 * time.Hour))
fmt.Println(HumanDuration(13*24*time.Hour + 5*time.Hour))
fmt.Println(HumanDuration(2 * 7 * 24 * time.Hour))
fmt.Println(HumanDuration(2*7*24*time.Hour + 4*24*time.Hour))
fmt.Println(HumanDuration(3 * 7 * 24 * time.Hour))
fmt.Println(HumanDuration(4 * 7 * 24 * time.Hour))
fmt.Println(HumanDuration(4*7*24*time.Hour + 3*24*time.Hour))
fmt.Println(HumanDuration(1 * 30 * 24 * time.Hour))
fmt.Println(HumanDuration(1*30*24*time.Hour + 2*7*24*time.Hour))
fmt.Println(HumanDuration(2 * 30 * 24 * time.Hour))
fmt.Println(HumanDuration(3*30*24*time.Hour + 1*7*24*time.Hour))
fmt.Println(HumanDuration(5*30*24*time.Hour + 2*7*24*time.Hour))
fmt.Println(HumanDuration(13 * 30 * 24 * time.Hour))
fmt.Println(HumanDuration(23 * 30 * 24 * time.Hour))
fmt.Println(HumanDuration(24 * 30 * 24 * time.Hour))
fmt.Println(HumanDuration(24*30*24*time.Hour + 2*7*24*time.Hour))
fmt.Println(HumanDuration(3*365*24*time.Hour + 2*30*24*time.Hour))
Output:

func HumanSize

func HumanSize(size float64) string

HumanSize returns a human-readable approximation of a size capped at 4 valid numbers (eg. "2.746 MB", "796 KB").

Example
fmt.Println(HumanSize(1000))
fmt.Println(HumanSize(1024))
fmt.Println(HumanSize(1000000))
fmt.Println(HumanSize(1048576))
fmt.Println(HumanSize(2 * MB))
fmt.Println(HumanSize(float64(3.42 * GB)))
fmt.Println(HumanSize(float64(5.372 * TB)))
fmt.Println(HumanSize(float64(2.22 * PB)))
Output:

func RAMInBytes

func RAMInBytes(size string) (int64, error)

RAMInBytes parses a human-readable string representing an amount of RAM in bytes, kibibytes, mebibytes, gibibytes, or tebibytes and returns the number of bytes, or -1 if the string is unparseable. Units are case-insensitive, and the 'b' suffix is optional.

Example
fmt.Println(RAMInBytes("32"))
fmt.Println(RAMInBytes("32b"))
fmt.Println(RAMInBytes("32B"))
fmt.Println(RAMInBytes("32k"))
fmt.Println(RAMInBytes("32K"))
fmt.Println(RAMInBytes("32kb"))
fmt.Println(RAMInBytes("32Kb"))
fmt.Println(RAMInBytes("32Mb"))
fmt.Println(RAMInBytes("32Gb"))
fmt.Println(RAMInBytes("32Tb"))
fmt.Println(RAMInBytes("32Pb"))
fmt.Println(RAMInBytes("32PB"))
fmt.Println(RAMInBytes("32P"))
Output:

Types

type Rlimit

type Rlimit struct {
	Type int    `json:"type,omitempty"`
	Hard uint64 `json:"hard,omitempty"`
	Soft uint64 `json:"soft,omitempty"`
}

Rlimit specifies the resource limits, such as max open files.

type Ulimit

type Ulimit struct {
	Name string
	Hard int64
	Soft int64
}

Ulimit is a human friendly version of Rlimit.

func ParseUlimit

func ParseUlimit(val string) (*Ulimit, error)

ParseUlimit parses and returns a Ulimit from the specified string.

Example
fmt.Println(ParseUlimit("nofile=512:1024"))
fmt.Println(ParseUlimit("nofile=1024"))
fmt.Println(ParseUlimit("cpu=2:4"))
fmt.Println(ParseUlimit("cpu=6"))
Output:

func (*Ulimit) GetRlimit

func (u *Ulimit) GetRlimit() (*Rlimit, error)

GetRlimit returns the RLimit corresponding to Ulimit.

func (*Ulimit) String

func (u *Ulimit) String() string

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