ooni-probe-cli/internal/humanize/humanize.go
Simone Basso 721ce95315
fix(all): introduce and use iox.CopyContext (#380)
* fix(all): introduce and use iox.CopyContext

This PR is part of https://github.com/ooni/probe/issues/1417.

In https://github.com/ooni/probe-cli/pull/379 we introduced a context
aware wrapper for io.ReadAll (formerly ioutil.ReadAll).

Here we introduce a context aware wrapper for io.Copy.

* fix(humanize): more significant digits

* fix: rename humanize files to follow the common pattern

* fix aligment

* fix test
2021-06-15 13:44:28 +02:00

30 lines
678 B
Go

// Package humanize is like dustin/go-humanize.
package humanize
import "fmt"
// SI is like dustin/go-humanize.SI but its implementation is
// specially tailored for printing download speeds.
func SI(value float64, unit string) string {
value, prefix := reduce(value)
return fmt.Sprintf("%6.2f %s%s", value, prefix, unit)
}
// reduce reduces value to a base value and a unit prefix. For
// example, reduce(1055) returns (1.055, "k").
func reduce(value float64) (float64, string) {
if value < 1e03 {
return value, " "
}
value /= 1e03
if value < 1e03 {
return value, "k"
}
value /= 1e03
if value < 1e03 {
return value, "M"
}
value /= 1e03
return value, "G"
}