Vendor go-humanize.
This commit is contained in:
Igor Mandrigin
parent
57425f0d48
commit
fd5748bd50
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@ -44,6 +44,12 @@
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]
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revision = "dcd4997b0664bcfd6ef48e4ae9da8396e08b1cd9"
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[[projects]]
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branch = "master"
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name = "github.com/dustin/go-humanize"
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packages = ["."]
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revision = "bb3d318650d48840a39aa21a027c6630e198e626"
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[[projects]]
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branch = "master"
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name = "github.com/edsrzf/mmap-go"
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@ -481,6 +487,6 @@
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[solve-meta]
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analyzer-name = "dep"
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analyzer-version = 1
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inputs-digest = "60de5c02bdb44bd7dab97643f7c8f730b5f496c7dcacaa68a6667aa909d0ac55"
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inputs-digest = "e09463dc940256a43b9438aecfef8d2205e5a6aec7ce203deea226dbe3ed67b9"
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solver-name = "gps-cdcl"
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solver-version = 1
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@ -0,0 +1,21 @@
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sudo: false
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language: go
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go:
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- 1.3.x
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- 1.5.x
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- 1.6.x
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- 1.7.x
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- 1.8.x
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- 1.9.x
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- master
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matrix:
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allow_failures:
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- go: master
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fast_finish: true
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install:
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- # Do nothing. This is needed to prevent default install action "go get -t -v ./..." from happening here (we want it to happen inside script step).
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script:
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- go get -t -v ./...
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- diff -u <(echo -n) <(gofmt -d -s .)
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- go tool vet .
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- go test -v -race ./...
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@ -0,0 +1,21 @@
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Copyright (c) 2005-2008 Dustin Sallings <dustin@spy.net>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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<http://www.opensource.org/licenses/mit-license.php>
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@ -0,0 +1,124 @@
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# Humane Units [](https://travis-ci.org/dustin/go-humanize) [](https://godoc.org/github.com/dustin/go-humanize)
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Just a few functions for helping humanize times and sizes.
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`go get` it as `github.com/dustin/go-humanize`, import it as
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`"github.com/dustin/go-humanize"`, use it as `humanize`.
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See [godoc](https://godoc.org/github.com/dustin/go-humanize) for
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complete documentation.
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## Sizes
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This lets you take numbers like `82854982` and convert them to useful
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strings like, `83 MB` or `79 MiB` (whichever you prefer).
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Example:
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```go
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fmt.Printf("That file is %s.", humanize.Bytes(82854982)) // That file is 83 MB.
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```
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## Times
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This lets you take a `time.Time` and spit it out in relative terms.
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For example, `12 seconds ago` or `3 days from now`.
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Example:
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```go
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fmt.Printf("This was touched %s.", humanize.Time(someTimeInstance)) // This was touched 7 hours ago.
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```
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Thanks to Kyle Lemons for the time implementation from an IRC
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conversation one day. It's pretty neat.
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## Ordinals
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From a [mailing list discussion][odisc] where a user wanted to be able
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to label ordinals.
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0 -> 0th
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1 -> 1st
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2 -> 2nd
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3 -> 3rd
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4 -> 4th
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[...]
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Example:
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```go
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fmt.Printf("You're my %s best friend.", humanize.Ordinal(193)) // You are my 193rd best friend.
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```
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## Commas
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Want to shove commas into numbers? Be my guest.
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0 -> 0
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100 -> 100
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1000 -> 1,000
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1000000000 -> 1,000,000,000
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-100000 -> -100,000
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Example:
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```go
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fmt.Printf("You owe $%s.\n", humanize.Comma(6582491)) // You owe $6,582,491.
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```
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## Ftoa
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Nicer float64 formatter that removes trailing zeros.
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```go
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fmt.Printf("%f", 2.24) // 2.240000
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fmt.Printf("%s", humanize.Ftoa(2.24)) // 2.24
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fmt.Printf("%f", 2.0) // 2.000000
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fmt.Printf("%s", humanize.Ftoa(2.0)) // 2
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```
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## SI notation
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Format numbers with [SI notation][sinotation].
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Example:
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```go
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humanize.SI(0.00000000223, "M") // 2.23 nM
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```
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## English-specific functions
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The following functions are in the `humanize/english` subpackage.
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### Plurals
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Simple English pluralization
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```go
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english.PluralWord(1, "object", "") // object
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english.PluralWord(42, "object", "") // objects
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english.PluralWord(2, "bus", "") // buses
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english.PluralWord(99, "locus", "loci") // loci
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english.Plural(1, "object", "") // 1 object
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english.Plural(42, "object", "") // 42 objects
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english.Plural(2, "bus", "") // 2 buses
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english.Plural(99, "locus", "loci") // 99 loci
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```
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### Word series
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Format comma-separated words lists with conjuctions:
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```go
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english.WordSeries([]string{"foo"}, "and") // foo
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english.WordSeries([]string{"foo", "bar"}, "and") // foo and bar
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english.WordSeries([]string{"foo", "bar", "baz"}, "and") // foo, bar and baz
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english.OxfordWordSeries([]string{"foo", "bar", "baz"}, "and") // foo, bar, and baz
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```
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[odisc]: https://groups.google.com/d/topic/golang-nuts/l8NhI74jl-4/discussion
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[sinotation]: http://en.wikipedia.org/wiki/Metric_prefix
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@ -0,0 +1,31 @@
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package humanize
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import (
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"math/big"
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)
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// order of magnitude (to a max order)
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func oomm(n, b *big.Int, maxmag int) (float64, int) {
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mag := 0
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m := &big.Int{}
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for n.Cmp(b) >= 0 {
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n.DivMod(n, b, m)
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mag++
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if mag == maxmag && maxmag >= 0 {
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break
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}
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}
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return float64(n.Int64()) + (float64(m.Int64()) / float64(b.Int64())), mag
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}
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// total order of magnitude
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// (same as above, but with no upper limit)
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func oom(n, b *big.Int) (float64, int) {
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mag := 0
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m := &big.Int{}
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for n.Cmp(b) >= 0 {
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n.DivMod(n, b, m)
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mag++
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}
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return float64(n.Int64()) + (float64(m.Int64()) / float64(b.Int64())), mag
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}
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@ -0,0 +1,173 @@
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package humanize
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import (
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"fmt"
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"math/big"
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"strings"
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"unicode"
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)
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var (
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bigIECExp = big.NewInt(1024)
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// BigByte is one byte in bit.Ints
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BigByte = big.NewInt(1)
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// BigKiByte is 1,024 bytes in bit.Ints
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BigKiByte = (&big.Int{}).Mul(BigByte, bigIECExp)
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// BigMiByte is 1,024 k bytes in bit.Ints
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BigMiByte = (&big.Int{}).Mul(BigKiByte, bigIECExp)
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// BigGiByte is 1,024 m bytes in bit.Ints
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BigGiByte = (&big.Int{}).Mul(BigMiByte, bigIECExp)
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// BigTiByte is 1,024 g bytes in bit.Ints
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BigTiByte = (&big.Int{}).Mul(BigGiByte, bigIECExp)
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// BigPiByte is 1,024 t bytes in bit.Ints
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BigPiByte = (&big.Int{}).Mul(BigTiByte, bigIECExp)
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// BigEiByte is 1,024 p bytes in bit.Ints
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BigEiByte = (&big.Int{}).Mul(BigPiByte, bigIECExp)
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// BigZiByte is 1,024 e bytes in bit.Ints
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BigZiByte = (&big.Int{}).Mul(BigEiByte, bigIECExp)
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// BigYiByte is 1,024 z bytes in bit.Ints
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BigYiByte = (&big.Int{}).Mul(BigZiByte, bigIECExp)
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)
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var (
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bigSIExp = big.NewInt(1000)
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// BigSIByte is one SI byte in big.Ints
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BigSIByte = big.NewInt(1)
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// BigKByte is 1,000 SI bytes in big.Ints
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BigKByte = (&big.Int{}).Mul(BigSIByte, bigSIExp)
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// BigMByte is 1,000 SI k bytes in big.Ints
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BigMByte = (&big.Int{}).Mul(BigKByte, bigSIExp)
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// BigGByte is 1,000 SI m bytes in big.Ints
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BigGByte = (&big.Int{}).Mul(BigMByte, bigSIExp)
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// BigTByte is 1,000 SI g bytes in big.Ints
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BigTByte = (&big.Int{}).Mul(BigGByte, bigSIExp)
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// BigPByte is 1,000 SI t bytes in big.Ints
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BigPByte = (&big.Int{}).Mul(BigTByte, bigSIExp)
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// BigEByte is 1,000 SI p bytes in big.Ints
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BigEByte = (&big.Int{}).Mul(BigPByte, bigSIExp)
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// BigZByte is 1,000 SI e bytes in big.Ints
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BigZByte = (&big.Int{}).Mul(BigEByte, bigSIExp)
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// BigYByte is 1,000 SI z bytes in big.Ints
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BigYByte = (&big.Int{}).Mul(BigZByte, bigSIExp)
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)
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var bigBytesSizeTable = map[string]*big.Int{
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"b": BigByte,
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"kib": BigKiByte,
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"kb": BigKByte,
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"mib": BigMiByte,
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"mb": BigMByte,
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"gib": BigGiByte,
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"gb": BigGByte,
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"tib": BigTiByte,
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"tb": BigTByte,
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"pib": BigPiByte,
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"pb": BigPByte,
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"eib": BigEiByte,
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"eb": BigEByte,
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"zib": BigZiByte,
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"zb": BigZByte,
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"yib": BigYiByte,
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"yb": BigYByte,
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// Without suffix
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"": BigByte,
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"ki": BigKiByte,
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"k": BigKByte,
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"mi": BigMiByte,
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"m": BigMByte,
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"gi": BigGiByte,
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"g": BigGByte,
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"ti": BigTiByte,
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"t": BigTByte,
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"pi": BigPiByte,
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"p": BigPByte,
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"ei": BigEiByte,
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"e": BigEByte,
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"z": BigZByte,
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"zi": BigZiByte,
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"y": BigYByte,
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"yi": BigYiByte,
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}
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var ten = big.NewInt(10)
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func humanateBigBytes(s, base *big.Int, sizes []string) string {
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if s.Cmp(ten) < 0 {
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return fmt.Sprintf("%d B", s)
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}
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c := (&big.Int{}).Set(s)
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val, mag := oomm(c, base, len(sizes)-1)
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suffix := sizes[mag]
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f := "%.0f %s"
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if val < 10 {
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f = "%.1f %s"
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}
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return fmt.Sprintf(f, val, suffix)
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}
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// BigBytes produces a human readable representation of an SI size.
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//
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// See also: ParseBigBytes.
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//
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// BigBytes(82854982) -> 83 MB
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func BigBytes(s *big.Int) string {
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sizes := []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
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return humanateBigBytes(s, bigSIExp, sizes)
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}
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// BigIBytes produces a human readable representation of an IEC size.
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//
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// See also: ParseBigBytes.
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//
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// BigIBytes(82854982) -> 79 MiB
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func BigIBytes(s *big.Int) string {
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sizes := []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"}
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return humanateBigBytes(s, bigIECExp, sizes)
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}
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// ParseBigBytes parses a string representation of bytes into the number
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// of bytes it represents.
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//
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// See also: BigBytes, BigIBytes.
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//
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// ParseBigBytes("42 MB") -> 42000000, nil
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// ParseBigBytes("42 mib") -> 44040192, nil
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func ParseBigBytes(s string) (*big.Int, error) {
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lastDigit := 0
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hasComma := false
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for _, r := range s {
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if !(unicode.IsDigit(r) || r == '.' || r == ',') {
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break
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}
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if r == ',' {
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hasComma = true
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}
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lastDigit++
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}
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num := s[:lastDigit]
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if hasComma {
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num = strings.Replace(num, ",", "", -1)
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}
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val := &big.Rat{}
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_, err := fmt.Sscanf(num, "%f", val)
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if err != nil {
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return nil, err
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}
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extra := strings.ToLower(strings.TrimSpace(s[lastDigit:]))
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if m, ok := bigBytesSizeTable[extra]; ok {
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mv := (&big.Rat{}).SetInt(m)
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val.Mul(val, mv)
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rv := &big.Int{}
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rv.Div(val.Num(), val.Denom())
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return rv, nil
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}
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return nil, fmt.Errorf("unhandled size name: %v", extra)
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}
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@ -0,0 +1,143 @@
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package humanize
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import (
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"fmt"
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"math"
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"strconv"
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"strings"
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"unicode"
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)
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// IEC Sizes.
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// kibis of bits
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const (
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Byte = 1 << (iota * 10)
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KiByte
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MiByte
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GiByte
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TiByte
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PiByte
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EiByte
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)
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// SI Sizes.
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const (
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IByte = 1
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KByte = IByte * 1000
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MByte = KByte * 1000
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GByte = MByte * 1000
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TByte = GByte * 1000
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PByte = TByte * 1000
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EByte = PByte * 1000
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)
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var bytesSizeTable = map[string]uint64{
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"b": Byte,
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"kib": KiByte,
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"kb": KByte,
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"mib": MiByte,
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"mb": MByte,
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"gib": GiByte,
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"gb": GByte,
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"tib": TiByte,
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"tb": TByte,
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"pib": PiByte,
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"pb": PByte,
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"eib": EiByte,
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"eb": EByte,
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// Without suffix
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"": Byte,
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"ki": KiByte,
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"k": KByte,
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"mi": MiByte,
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"m": MByte,
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"gi": GiByte,
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"g": GByte,
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"ti": TiByte,
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"t": TByte,
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"pi": PiByte,
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"p": PByte,
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"ei": EiByte,
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"e": EByte,
|
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}
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func logn(n, b float64) float64 {
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return math.Log(n) / math.Log(b)
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}
|
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|
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func humanateBytes(s uint64, base float64, sizes []string) string {
|
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if s < 10 {
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return fmt.Sprintf("%d B", s)
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}
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e := math.Floor(logn(float64(s), base))
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suffix := sizes[int(e)]
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val := math.Floor(float64(s)/math.Pow(base, e)*10+0.5) / 10
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f := "%.0f %s"
|
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if val < 10 {
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f = "%.1f %s"
|
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}
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|
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return fmt.Sprintf(f, val, suffix)
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}
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|
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// Bytes produces a human readable representation of an SI size.
|
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//
|
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// See also: ParseBytes.
|
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//
|
||||
// Bytes(82854982) -> 83 MB
|
||||
func Bytes(s uint64) string {
|
||||
sizes := []string{"B", "kB", "MB", "GB", "TB", "PB", "EB"}
|
||||
return humanateBytes(s, 1000, sizes)
|
||||
}
|
||||
|
||||
// IBytes produces a human readable representation of an IEC size.
|
||||
//
|
||||
// See also: ParseBytes.
|
||||
//
|
||||
// IBytes(82854982) -> 79 MiB
|
||||
func IBytes(s uint64) string {
|
||||
sizes := []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB"}
|
||||
return humanateBytes(s, 1024, sizes)
|
||||
}
|
||||
|
||||
// ParseBytes parses a string representation of bytes into the number
|
||||
// of bytes it represents.
|
||||
//
|
||||
// See Also: Bytes, IBytes.
|
||||
//
|
||||
// ParseBytes("42 MB") -> 42000000, nil
|
||||
// ParseBytes("42 mib") -> 44040192, nil
|
||||
func ParseBytes(s string) (uint64, error) {
|
||||
lastDigit := 0
|
||||
hasComma := false
|
||||
for _, r := range s {
|
||||
if !(unicode.IsDigit(r) || r == '.' || r == ',') {
|
||||
break
|
||||
}
|
||||
if r == ',' {
|
||||
hasComma = true
|
||||
}
|
||||
lastDigit++
|
||||
}
|
||||
|
||||
num := s[:lastDigit]
|
||||
if hasComma {
|
||||
num = strings.Replace(num, ",", "", -1)
|
||||
}
|
||||
|
||||
f, err := strconv.ParseFloat(num, 64)
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
|
||||
extra := strings.ToLower(strings.TrimSpace(s[lastDigit:]))
|
||||
if m, ok := bytesSizeTable[extra]; ok {
|
||||
f *= float64(m)
|
||||
if f >= math.MaxUint64 {
|
||||
return 0, fmt.Errorf("too large: %v", s)
|
||||
}
|
||||
return uint64(f), nil
|
||||
}
|
||||
|
||||
return 0, fmt.Errorf("unhandled size name: %v", extra)
|
||||
}
|
||||
|
|
@ -0,0 +1,108 @@
|
|||
package humanize
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"math"
|
||||
"math/big"
|
||||
"strconv"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// Comma produces a string form of the given number in base 10 with
|
||||
// commas after every three orders of magnitude.
|
||||
//
|
||||
// e.g. Comma(834142) -> 834,142
|
||||
func Comma(v int64) string {
|
||||
sign := ""
|
||||
|
||||
// Min int64 can't be negated to a usable value, so it has to be special cased.
|
||||
if v == math.MinInt64 {
|
||||
return "-9,223,372,036,854,775,808"
|
||||
}
|
||||
|
||||
if v < 0 {
|
||||
sign = "-"
|
||||
v = 0 - v
|
||||
}
|
||||
|
||||
parts := []string{"", "", "", "", "", "", ""}
|
||||
j := len(parts) - 1
|
||||
|
||||
for v > 999 {
|
||||
parts[j] = strconv.FormatInt(v%1000, 10)
|
||||
switch len(parts[j]) {
|
||||
case 2:
|
||||
parts[j] = "0" + parts[j]
|
||||
case 1:
|
||||
parts[j] = "00" + parts[j]
|
||||
}
|
||||
v = v / 1000
|
||||
j--
|
||||
}
|
||||
parts[j] = strconv.Itoa(int(v))
|
||||
return sign + strings.Join(parts[j:], ",")
|
||||
}
|
||||
|
||||
// Commaf produces a string form of the given number in base 10 with
|
||||
// commas after every three orders of magnitude.
|
||||
//
|
||||
// e.g. Commaf(834142.32) -> 834,142.32
|
||||
func Commaf(v float64) string {
|
||||
buf := &bytes.Buffer{}
|
||||
if v < 0 {
|
||||
buf.Write([]byte{'-'})
|
||||
v = 0 - v
|
||||
}
|
||||
|
||||
comma := []byte{','}
|
||||
|
||||
parts := strings.Split(strconv.FormatFloat(v, 'f', -1, 64), ".")
|
||||
pos := 0
|
||||
if len(parts[0])%3 != 0 {
|
||||
pos += len(parts[0]) % 3
|
||||
buf.WriteString(parts[0][:pos])
|
||||
buf.Write(comma)
|
||||
}
|
||||
for ; pos < len(parts[0]); pos += 3 {
|
||||
buf.WriteString(parts[0][pos : pos+3])
|
||||
buf.Write(comma)
|
||||
}
|
||||
buf.Truncate(buf.Len() - 1)
|
||||
|
||||
if len(parts) > 1 {
|
||||
buf.Write([]byte{'.'})
|
||||
buf.WriteString(parts[1])
|
||||
}
|
||||
return buf.String()
|
||||
}
|
||||
|
||||
// BigComma produces a string form of the given big.Int in base 10
|
||||
// with commas after every three orders of magnitude.
|
||||
func BigComma(b *big.Int) string {
|
||||
sign := ""
|
||||
if b.Sign() < 0 {
|
||||
sign = "-"
|
||||
b.Abs(b)
|
||||
}
|
||||
|
||||
athousand := big.NewInt(1000)
|
||||
c := (&big.Int{}).Set(b)
|
||||
_, m := oom(c, athousand)
|
||||
parts := make([]string, m+1)
|
||||
j := len(parts) - 1
|
||||
|
||||
mod := &big.Int{}
|
||||
for b.Cmp(athousand) >= 0 {
|
||||
b.DivMod(b, athousand, mod)
|
||||
parts[j] = strconv.FormatInt(mod.Int64(), 10)
|
||||
switch len(parts[j]) {
|
||||
case 2:
|
||||
parts[j] = "0" + parts[j]
|
||||
case 1:
|
||||
parts[j] = "00" + parts[j]
|
||||
}
|
||||
j--
|
||||
}
|
||||
parts[j] = strconv.Itoa(int(b.Int64()))
|
||||
return sign + strings.Join(parts[j:], ",")
|
||||
}
|
||||
|
|
@ -0,0 +1,40 @@
|
|||
// +build go1.6
|
||||
|
||||
package humanize
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"math/big"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// BigCommaf produces a string form of the given big.Float in base 10
|
||||
// with commas after every three orders of magnitude.
|
||||
func BigCommaf(v *big.Float) string {
|
||||
buf := &bytes.Buffer{}
|
||||
if v.Sign() < 0 {
|
||||
buf.Write([]byte{'-'})
|
||||
v.Abs(v)
|
||||
}
|
||||
|
||||
comma := []byte{','}
|
||||
|
||||
parts := strings.Split(v.Text('f', -1), ".")
|
||||
pos := 0
|
||||
if len(parts[0])%3 != 0 {
|
||||
pos += len(parts[0]) % 3
|
||||
buf.WriteString(parts[0][:pos])
|
||||
buf.Write(comma)
|
||||
}
|
||||
for ; pos < len(parts[0]); pos += 3 {
|
||||
buf.WriteString(parts[0][pos : pos+3])
|
||||
buf.Write(comma)
|
||||
}
|
||||
buf.Truncate(buf.Len() - 1)
|
||||
|
||||
if len(parts) > 1 {
|
||||
buf.Write([]byte{'.'})
|
||||
buf.WriteString(parts[1])
|
||||
}
|
||||
return buf.String()
|
||||
}
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
package humanize
|
||||
|
||||
import "strconv"
|
||||
|
||||
func stripTrailingZeros(s string) string {
|
||||
offset := len(s) - 1
|
||||
for offset > 0 {
|
||||
if s[offset] == '.' {
|
||||
offset--
|
||||
break
|
||||
}
|
||||
if s[offset] != '0' {
|
||||
break
|
||||
}
|
||||
offset--
|
||||
}
|
||||
return s[:offset+1]
|
||||
}
|
||||
|
||||
// Ftoa converts a float to a string with no trailing zeros.
|
||||
func Ftoa(num float64) string {
|
||||
return stripTrailingZeros(strconv.FormatFloat(num, 'f', 6, 64))
|
||||
}
|
||||
|
|
@ -0,0 +1,8 @@
|
|||
/*
|
||||
Package humanize converts boring ugly numbers to human-friendly strings and back.
|
||||
|
||||
Durations can be turned into strings such as "3 days ago", numbers
|
||||
representing sizes like 82854982 into useful strings like, "83 MB" or
|
||||
"79 MiB" (whichever you prefer).
|
||||
*/
|
||||
package humanize
|
||||
|
|
@ -0,0 +1,192 @@
|
|||
package humanize
|
||||
|
||||
/*
|
||||
Slightly adapted from the source to fit go-humanize.
|
||||
|
||||
Author: https://github.com/gorhill
|
||||
Source: https://gist.github.com/gorhill/5285193
|
||||
|
||||
*/
|
||||
|
||||
import (
|
||||
"math"
|
||||
"strconv"
|
||||
)
|
||||
|
||||
var (
|
||||
renderFloatPrecisionMultipliers = [...]float64{
|
||||
1,
|
||||
10,
|
||||
100,
|
||||
1000,
|
||||
10000,
|
||||
100000,
|
||||
1000000,
|
||||
10000000,
|
||||
100000000,
|
||||
1000000000,
|
||||
}
|
||||
|
||||
renderFloatPrecisionRounders = [...]float64{
|
||||
0.5,
|
||||
0.05,
|
||||
0.005,
|
||||
0.0005,
|
||||
0.00005,
|
||||
0.000005,
|
||||
0.0000005,
|
||||
0.00000005,
|
||||
0.000000005,
|
||||
0.0000000005,
|
||||
}
|
||||
)
|
||||
|
||||
// FormatFloat produces a formatted number as string based on the following user-specified criteria:
|
||||
// * thousands separator
|
||||
// * decimal separator
|
||||
// * decimal precision
|
||||
//
|
||||
// Usage: s := RenderFloat(format, n)
|
||||
// The format parameter tells how to render the number n.
|
||||
//
|
||||
// See examples: http://play.golang.org/p/LXc1Ddm1lJ
|
||||
//
|
||||
// Examples of format strings, given n = 12345.6789:
|
||||
// "#,###.##" => "12,345.67"
|
||||
// "#,###." => "12,345"
|
||||
// "#,###" => "12345,678"
|
||||
// "#\u202F###,##" => "12 345,68"
|
||||
// "#.###,###### => 12.345,678900
|
||||
// "" (aka default format) => 12,345.67
|
||||
//
|
||||
// The highest precision allowed is 9 digits after the decimal symbol.
|
||||
// There is also a version for integer number, FormatInteger(),
|
||||
// which is convenient for calls within template.
|
||||
func FormatFloat(format string, n float64) string {
|
||||
// Special cases:
|
||||
// NaN = "NaN"
|
||||
// +Inf = "+Infinity"
|
||||
// -Inf = "-Infinity"
|
||||
if math.IsNaN(n) {
|
||||
return "NaN"
|
||||
}
|
||||
if n > math.MaxFloat64 {
|
||||
return "Infinity"
|
||||
}
|
||||
if n < -math.MaxFloat64 {
|
||||
return "-Infinity"
|
||||
}
|
||||
|
||||
// default format
|
||||
precision := 2
|
||||
decimalStr := "."
|
||||
thousandStr := ","
|
||||
positiveStr := ""
|
||||
negativeStr := "-"
|
||||
|
||||
if len(format) > 0 {
|
||||
format := []rune(format)
|
||||
|
||||
// If there is an explicit format directive,
|
||||
// then default values are these:
|
||||
precision = 9
|
||||
thousandStr = ""
|
||||
|
||||
// collect indices of meaningful formatting directives
|
||||
formatIndx := []int{}
|
||||
for i, char := range format {
|
||||
if char != '#' && char != '0' {
|
||||
formatIndx = append(formatIndx, i)
|
||||
}
|
||||
}
|
||||
|
||||
if len(formatIndx) > 0 {
|
||||
// Directive at index 0:
|
||||
// Must be a '+'
|
||||
// Raise an error if not the case
|
||||
// index: 0123456789
|
||||
// +0.000,000
|
||||
// +000,000.0
|
||||
// +0000.00
|
||||
// +0000
|
||||
if formatIndx[0] == 0 {
|
||||
if format[formatIndx[0]] != '+' {
|
||||
panic("RenderFloat(): invalid positive sign directive")
|
||||
}
|
||||
positiveStr = "+"
|
||||
formatIndx = formatIndx[1:]
|
||||
}
|
||||
|
||||
// Two directives:
|
||||
// First is thousands separator
|
||||
// Raise an error if not followed by 3-digit
|
||||
// 0123456789
|
||||
// 0.000,000
|
||||
// 000,000.00
|
||||
if len(formatIndx) == 2 {
|
||||
if (formatIndx[1] - formatIndx[0]) != 4 {
|
||||
panic("RenderFloat(): thousands separator directive must be followed by 3 digit-specifiers")
|
||||
}
|
||||
thousandStr = string(format[formatIndx[0]])
|
||||
formatIndx = formatIndx[1:]
|
||||
}
|
||||
|
||||
// One directive:
|
||||
// Directive is decimal separator
|
||||
// The number of digit-specifier following the separator indicates wanted precision
|
||||
// 0123456789
|
||||
// 0.00
|
||||
// 000,0000
|
||||
if len(formatIndx) == 1 {
|
||||
decimalStr = string(format[formatIndx[0]])
|
||||
precision = len(format) - formatIndx[0] - 1
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// generate sign part
|
||||
var signStr string
|
||||
if n >= 0.000000001 {
|
||||
signStr = positiveStr
|
||||
} else if n <= -0.000000001 {
|
||||
signStr = negativeStr
|
||||
n = -n
|
||||
} else {
|
||||
signStr = ""
|
||||
n = 0.0
|
||||
}
|
||||
|
||||
// split number into integer and fractional parts
|
||||
intf, fracf := math.Modf(n + renderFloatPrecisionRounders[precision])
|
||||
|
||||
// generate integer part string
|
||||
intStr := strconv.FormatInt(int64(intf), 10)
|
||||
|
||||
// add thousand separator if required
|
||||
if len(thousandStr) > 0 {
|
||||
for i := len(intStr); i > 3; {
|
||||
i -= 3
|
||||
intStr = intStr[:i] + thousandStr + intStr[i:]
|
||||
}
|
||||
}
|
||||
|
||||
// no fractional part, we can leave now
|
||||
if precision == 0 {
|
||||
return signStr + intStr
|
||||
}
|
||||
|
||||
// generate fractional part
|
||||
fracStr := strconv.Itoa(int(fracf * renderFloatPrecisionMultipliers[precision]))
|
||||
// may need padding
|
||||
if len(fracStr) < precision {
|
||||
fracStr = "000000000000000"[:precision-len(fracStr)] + fracStr
|
||||
}
|
||||
|
||||
return signStr + intStr + decimalStr + fracStr
|
||||
}
|
||||
|
||||
// FormatInteger produces a formatted number as string.
|
||||
// See FormatFloat.
|
||||
func FormatInteger(format string, n int) string {
|
||||
return FormatFloat(format, float64(n))
|
||||
}
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
package humanize
|
||||
|
||||
import "strconv"
|
||||
|
||||
// Ordinal gives you the input number in a rank/ordinal format.
|
||||
//
|
||||
// Ordinal(3) -> 3rd
|
||||
func Ordinal(x int) string {
|
||||
suffix := "th"
|
||||
switch x % 10 {
|
||||
case 1:
|
||||
if x%100 != 11 {
|
||||
suffix = "st"
|
||||
}
|
||||
case 2:
|
||||
if x%100 != 12 {
|
||||
suffix = "nd"
|
||||
}
|
||||
case 3:
|
||||
if x%100 != 13 {
|
||||
suffix = "rd"
|
||||
}
|
||||
}
|
||||
return strconv.Itoa(x) + suffix
|
||||
}
|
||||
|
|
@ -0,0 +1,113 @@
|
|||
package humanize
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"math"
|
||||
"regexp"
|
||||
"strconv"
|
||||
)
|
||||
|
||||
var siPrefixTable = map[float64]string{
|
||||
-24: "y", // yocto
|
||||
-21: "z", // zepto
|
||||
-18: "a", // atto
|
||||
-15: "f", // femto
|
||||
-12: "p", // pico
|
||||
-9: "n", // nano
|
||||
-6: "µ", // micro
|
||||
-3: "m", // milli
|
||||
0: "",
|
||||
3: "k", // kilo
|
||||
6: "M", // mega
|
||||
9: "G", // giga
|
||||
12: "T", // tera
|
||||
15: "P", // peta
|
||||
18: "E", // exa
|
||||
21: "Z", // zetta
|
||||
24: "Y", // yotta
|
||||
}
|
||||
|
||||
var revSIPrefixTable = revfmap(siPrefixTable)
|
||||
|
||||
// revfmap reverses the map and precomputes the power multiplier
|
||||
func revfmap(in map[float64]string) map[string]float64 {
|
||||
rv := map[string]float64{}
|
||||
for k, v := range in {
|
||||
rv[v] = math.Pow(10, k)
|
||||
}
|
||||
return rv
|
||||
}
|
||||
|
||||
var riParseRegex *regexp.Regexp
|
||||
|
||||
func init() {
|
||||
ri := `^([\-0-9.]+)\s?([`
|
||||
for _, v := range siPrefixTable {
|
||||
ri += v
|
||||
}
|
||||
ri += `]?)(.*)`
|
||||
|
||||
riParseRegex = regexp.MustCompile(ri)
|
||||
}
|
||||
|
||||
// ComputeSI finds the most appropriate SI prefix for the given number
|
||||
// and returns the prefix along with the value adjusted to be within
|
||||
// that prefix.
|
||||
//
|
||||
// See also: SI, ParseSI.
|
||||
//
|
||||
// e.g. ComputeSI(2.2345e-12) -> (2.2345, "p")
|
||||
func ComputeSI(input float64) (float64, string) {
|
||||
if input == 0 {
|
||||
return 0, ""
|
||||
}
|
||||
mag := math.Abs(input)
|
||||
exponent := math.Floor(logn(mag, 10))
|
||||
exponent = math.Floor(exponent/3) * 3
|
||||
|
||||
value := mag / math.Pow(10, exponent)
|
||||
|
||||
// Handle special case where value is exactly 1000.0
|
||||
// Should return 1 M instead of 1000 k
|
||||
if value == 1000.0 {
|
||||
exponent += 3
|
||||
value = mag / math.Pow(10, exponent)
|
||||
}
|
||||
|
||||
value = math.Copysign(value, input)
|
||||
|
||||
prefix := siPrefixTable[exponent]
|
||||
return value, prefix
|
||||
}
|
||||
|
||||
// SI returns a string with default formatting.
|
||||
//
|
||||
// SI uses Ftoa to format float value, removing trailing zeros.
|
||||
//
|
||||
// See also: ComputeSI, ParseSI.
|
||||
//
|
||||
// e.g. SI(1000000, "B") -> 1 MB
|
||||
// e.g. SI(2.2345e-12, "F") -> 2.2345 pF
|
||||
func SI(input float64, unit string) string {
|
||||
value, prefix := ComputeSI(input)
|
||||
return Ftoa(value) + " " + prefix + unit
|
||||
}
|
||||
|
||||
var errInvalid = errors.New("invalid input")
|
||||
|
||||
// ParseSI parses an SI string back into the number and unit.
|
||||
//
|
||||
// See also: SI, ComputeSI.
|
||||
//
|
||||
// e.g. ParseSI("2.2345 pF") -> (2.2345e-12, "F", nil)
|
||||
func ParseSI(input string) (float64, string, error) {
|
||||
found := riParseRegex.FindStringSubmatch(input)
|
||||
if len(found) != 4 {
|
||||
return 0, "", errInvalid
|
||||
}
|
||||
mag := revSIPrefixTable[found[2]]
|
||||
unit := found[3]
|
||||
|
||||
base, err := strconv.ParseFloat(found[1], 64)
|
||||
return base * mag, unit, err
|
||||
}
|
||||
|
|
@ -0,0 +1,117 @@
|
|||
package humanize
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"math"
|
||||
"sort"
|
||||
"time"
|
||||
)
|
||||
|
||||
// Seconds-based time units
|
||||
const (
|
||||
Day = 24 * time.Hour
|
||||
Week = 7 * Day
|
||||
Month = 30 * Day
|
||||
Year = 12 * Month
|
||||
LongTime = 37 * Year
|
||||
)
|
||||
|
||||
// Time formats a time into a relative string.
|
||||
//
|
||||
// Time(someT) -> "3 weeks ago"
|
||||
func Time(then time.Time) string {
|
||||
return RelTime(then, time.Now(), "ago", "from now")
|
||||
}
|
||||
|
||||
// A RelTimeMagnitude struct contains a relative time point at which
|
||||
// the relative format of time will switch to a new format string. A
|
||||
// slice of these in ascending order by their "D" field is passed to
|
||||
// CustomRelTime to format durations.
|
||||
//
|
||||
// The Format field is a string that may contain a "%s" which will be
|
||||
// replaced with the appropriate signed label (e.g. "ago" or "from
|
||||
// now") and a "%d" that will be replaced by the quantity.
|
||||
//
|
||||
// The DivBy field is the amount of time the time difference must be
|
||||
// divided by in order to display correctly.
|
||||
//
|
||||
// e.g. if D is 2*time.Minute and you want to display "%d minutes %s"
|
||||
// DivBy should be time.Minute so whatever the duration is will be
|
||||
// expressed in minutes.
|
||||
type RelTimeMagnitude struct {
|
||||
D time.Duration
|
||||
Format string
|
||||
DivBy time.Duration
|
||||
}
|
||||
|
||||
var defaultMagnitudes = []RelTimeMagnitude{
|
||||
{time.Second, "now", time.Second},
|
||||
{2 * time.Second, "1 second %s", 1},
|
||||
{time.Minute, "%d seconds %s", time.Second},
|
||||
{2 * time.Minute, "1 minute %s", 1},
|
||||
{time.Hour, "%d minutes %s", time.Minute},
|
||||
{2 * time.Hour, "1 hour %s", 1},
|
||||
{Day, "%d hours %s", time.Hour},
|
||||
{2 * Day, "1 day %s", 1},
|
||||
{Week, "%d days %s", Day},
|
||||
{2 * Week, "1 week %s", 1},
|
||||
{Month, "%d weeks %s", Week},
|
||||
{2 * Month, "1 month %s", 1},
|
||||
{Year, "%d months %s", Month},
|
||||
{18 * Month, "1 year %s", 1},
|
||||
{2 * Year, "2 years %s", 1},
|
||||
{LongTime, "%d years %s", Year},
|
||||
{math.MaxInt64, "a long while %s", 1},
|
||||
}
|
||||
|
||||
// RelTime formats a time into a relative string.
|
||||
//
|
||||
// It takes two times and two labels. In addition to the generic time
|
||||
// delta string (e.g. 5 minutes), the labels are used applied so that
|
||||
// the label corresponding to the smaller time is applied.
|
||||
//
|
||||
// RelTime(timeInPast, timeInFuture, "earlier", "later") -> "3 weeks earlier"
|
||||
func RelTime(a, b time.Time, albl, blbl string) string {
|
||||
return CustomRelTime(a, b, albl, blbl, defaultMagnitudes)
|
||||
}
|
||||
|
||||
// CustomRelTime formats a time into a relative string.
|
||||
//
|
||||
// It takes two times two labels and a table of relative time formats.
|
||||
// In addition to the generic time delta string (e.g. 5 minutes), the
|
||||
// labels are used applied so that the label corresponding to the
|
||||
// smaller time is applied.
|
||||
func CustomRelTime(a, b time.Time, albl, blbl string, magnitudes []RelTimeMagnitude) string {
|
||||
lbl := albl
|
||||
diff := b.Sub(a)
|
||||
|
||||
if a.After(b) {
|
||||
lbl = blbl
|
||||
diff = a.Sub(b)
|
||||
}
|
||||
|
||||
n := sort.Search(len(magnitudes), func(i int) bool {
|
||||
return magnitudes[i].D > diff
|
||||
})
|
||||
|
||||
if n >= len(magnitudes) {
|
||||
n = len(magnitudes) - 1
|
||||
}
|
||||
mag := magnitudes[n]
|
||||
args := []interface{}{}
|
||||
escaped := false
|
||||
for _, ch := range mag.Format {
|
||||
if escaped {
|
||||
switch ch {
|
||||
case 's':
|
||||
args = append(args, lbl)
|
||||
case 'd':
|
||||
args = append(args, diff/mag.DivBy)
|
||||
}
|
||||
escaped = false
|
||||
} else {
|
||||
escaped = ch == '%'
|
||||
}
|
||||
}
|
||||
return fmt.Sprintf(mag.Format, args...)
|
||||
}
|
||||
Loading…
Reference in New Issue