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vendor: add go-units 

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
docker-18.09
Tonis Tiigi 2017-06-16 16:12:22 -07:00
parent 13f3a45b1d
commit faf258dd2e
6 changed files with 469 additions and 1 deletions
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vendor.conf
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@ -27,4 +27,4 @@ google.golang.org/genproto d80a6e20e776b0b17a324d0ba1ab50a39c8e8944
golang.org/x/text 19e51611da83d6be54ddafce4a4af510cb3e9ea4
github.com/urfave/cli d70f47eeca3afd795160003bc6e28b001d60c67c
github.com/morikuni/aec 39771216ff4c63d11f5e604076f9c45e8be1067b
github.com/docker/go-units 0dadbb0345b35ec7ef35e228dabb8de89a65bf52

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[![GoDoc](https://godoc.org/github.com/docker/go-units?status.svg)](https://godoc.org/github.com/docker/go-units)
# Introduction
go-units is a library to transform human friendly measurements into machine friendly values.
## Usage
See the [docs in godoc](https://godoc.org/github.com/docker/go-units) for examples and documentation.
## Copyright and license
Copyright © 2015 Docker, Inc.
go-units is licensed under the Apache License, Version 2.0.
See [LICENSE](LICENSE) for the full text of the license.

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// Package units provides helper function to parse and print size and time units
// in human-readable format.
package units
import (
"fmt"
"time"
)
// HumanDuration returns a human-readable approximation of a duration
// (eg. "About a minute", "4 hours ago", etc.).
func HumanDuration(d time.Duration) string {
if seconds := int(d.Seconds()); seconds < 1 {
return "Less than a second"
} else if seconds == 1 {
return "1 second"
} else if seconds < 60 {
return fmt.Sprintf("%d seconds", seconds)
} else if minutes := int(d.Minutes()); minutes == 1 {
return "About a minute"
} else if minutes < 46 {
return fmt.Sprintf("%d minutes", minutes)
} else if hours := int(d.Hours() + 0.5); hours == 1 {
return "About an hour"
} else if hours < 48 {
return fmt.Sprintf("%d hours", hours)
} else if hours < 24*7*2 {
return fmt.Sprintf("%d days", hours/24)
} else if hours < 24*30*2 {
return fmt.Sprintf("%d weeks", hours/24/7)
} else if hours < 24*365*2 {
return fmt.Sprintf("%d months", hours/24/30)
}
return fmt.Sprintf("%d years", int(d.Hours())/24/365)
}

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package units
import (
"fmt"
"regexp"
"strconv"
"strings"
)
// See: http://en.wikipedia.org/wiki/Binary_prefix
const (
// Decimal
KB = 1000
MB = 1000 * KB
GB = 1000 * MB
TB = 1000 * GB
PB = 1000 * TB
// Binary
KiB = 1024
MiB = 1024 * KiB
GiB = 1024 * MiB
TiB = 1024 * GiB
PiB = 1024 * TiB
)
type unitMap map[string]int64
var (
decimalMap = unitMap{"k": KB, "m": MB, "g": GB, "t": TB, "p": PB}
binaryMap = unitMap{"k": KiB, "m": MiB, "g": GiB, "t": TiB, "p": PiB}
sizeRegex = regexp.MustCompile(`^(\d+(\.\d+)*) ?([kKmMgGtTpP])?[bB]?$`)
)
var decimapAbbrs = []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
var binaryAbbrs = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"}
func getSizeAndUnit(size float64, base float64, _map []string) (float64, string) {
i := 0
unitsLimit := len(_map) - 1
for size >= base && i < unitsLimit {
size = size / base
i++
}
return size, _map[i]
}
// CustomSize returns a human-readable approximation of a size
// using custom format.
func CustomSize(format string, size float64, base float64, _map []string) string {
size, unit := getSizeAndUnit(size, base, _map)
return fmt.Sprintf(format, size, unit)
}
// HumanSizeWithPrecision allows the size to be in any precision,
// instead of 4 digit precision used in units.HumanSize.
func HumanSizeWithPrecision(size float64, precision int) string {
size, unit := getSizeAndUnit(size, 1000.0, decimapAbbrs)
return fmt.Sprintf("%.*g%s", precision, size, unit)
}
// HumanSize returns a human-readable approximation of a size
// capped at 4 valid numbers (eg. "2.746 MB", "796 KB").
func HumanSize(size float64) string {
return HumanSizeWithPrecision(size, 4)
}
// BytesSize returns a human-readable size in bytes, kibibytes,
// mebibytes, gibibytes, or tebibytes (eg. "44kiB", "17MiB").
func BytesSize(size float64) string {
return CustomSize("%.4g%s", size, 1024.0, binaryAbbrs)
}
// FromHumanSize returns an integer from a human-readable specification of a
// size using SI standard (eg. "44kB", "17MB").
func FromHumanSize(size string) (int64, error) {
return parseSize(size, decimalMap)
}
// 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.
func RAMInBytes(size string) (int64, error) {
return parseSize(size, binaryMap)
}
// Parses the human-readable size string into the amount it represents.
func parseSize(sizeStr string, uMap unitMap) (int64, error) {
matches := sizeRegex.FindStringSubmatch(sizeStr)
if len(matches) != 4 {
return -1, fmt.Errorf("invalid size: '%s'", sizeStr)
}
size, err := strconv.ParseFloat(matches[1], 64)
if err != nil {
return -1, err
}
unitPrefix := strings.ToLower(matches[3])
if mul, ok := uMap[unitPrefix]; ok {
size *= float64(mul)
}
return int64(size), nil
}

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package units
import (
"fmt"
"strconv"
"strings"
)
// Ulimit is a human friendly version of Rlimit.
type Ulimit struct {
Name string
Hard int64
Soft int64
}
// Rlimit specifies the resource limits, such as max open files.
type Rlimit struct {
Type int `json:"type,omitempty"`
Hard uint64 `json:"hard,omitempty"`
Soft uint64 `json:"soft,omitempty"`
}
const (
// magic numbers for making the syscall
// some of these are defined in the syscall package, but not all.
// Also since Windows client doesn't get access to the syscall package, need to
// define these here
rlimitAs = 9
rlimitCore = 4
rlimitCPU = 0
rlimitData = 2
rlimitFsize = 1
rlimitLocks = 10
rlimitMemlock = 8
rlimitMsgqueue = 12
rlimitNice = 13
rlimitNofile = 7
rlimitNproc = 6
rlimitRss = 5
rlimitRtprio = 14
rlimitRttime = 15
rlimitSigpending = 11
rlimitStack = 3
)
var ulimitNameMapping = map[string]int{
//"as": rlimitAs, // Disabled since this doesn't seem usable with the way Docker inits a container.
"core": rlimitCore,
"cpu": rlimitCPU,
"data": rlimitData,
"fsize": rlimitFsize,
"locks": rlimitLocks,
"memlock": rlimitMemlock,
"msgqueue": rlimitMsgqueue,
"nice": rlimitNice,
"nofile": rlimitNofile,
"nproc": rlimitNproc,
"rss": rlimitRss,
"rtprio": rlimitRtprio,
"rttime": rlimitRttime,
"sigpending": rlimitSigpending,
"stack": rlimitStack,
}
// ParseUlimit parses and returns a Ulimit from the specified string.
func ParseUlimit(val string) (*Ulimit, error) {
parts := strings.SplitN(val, "=", 2)
if len(parts) != 2 {
return nil, fmt.Errorf("invalid ulimit argument: %s", val)
}
if _, exists := ulimitNameMapping[parts[0]]; !exists {
return nil, fmt.Errorf("invalid ulimit type: %s", parts[0])
}
var (
soft int64
hard = &soft // default to soft in case no hard was set
temp int64
err error
)
switch limitVals := strings.Split(parts[1], ":"); len(limitVals) {
case 2:
temp, err = strconv.ParseInt(limitVals[1], 10, 64)
if err != nil {
return nil, err
}
hard = &temp
fallthrough
case 1:
soft, err = strconv.ParseInt(limitVals[0], 10, 64)
if err != nil {
return nil, err
}
default:
return nil, fmt.Errorf("too many limit value arguments - %s, can only have up to two, `soft[:hard]`", parts[1])
}
if soft > *hard {
return nil, fmt.Errorf("ulimit soft limit must be less than or equal to hard limit: %d > %d", soft, *hard)
}
return &Ulimit{Name: parts[0], Soft: soft, Hard: *hard}, nil
}
// GetRlimit returns the RLimit corresponding to Ulimit.
func (u *Ulimit) GetRlimit() (*Rlimit, error) {
t, exists := ulimitNameMapping[u.Name]
if !exists {
return nil, fmt.Errorf("invalid ulimit name %s", u.Name)
}
return &Rlimit{Type: t, Soft: uint64(u.Soft), Hard: uint64(u.Hard)}, nil
}
func (u *Ulimit) String() string {
return fmt.Sprintf("%s=%d:%d", u.Name, u.Soft, u.Hard)
}