68928c3485
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
package units
|
|
|
|
import (
|
|
"fmt"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
// HumanSize returns a human-readable approximation of a size
|
|
// using SI standard (eg. "44kB", "17MB")
|
|
func HumanSize(size int64) string {
|
|
i := 0
|
|
var sizef float64
|
|
sizef = float64(size)
|
|
units := []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
|
|
for sizef >= 1000.0 {
|
|
sizef = sizef / 1000.0
|
|
i++
|
|
}
|
|
return fmt.Sprintf("%.4g %s", sizef, units[i])
|
|
}
|
|
|
|
// Parses a human-readable string representing an amount of RAM
|
|
// in bytes, kibibytes, mebibytes or gibibytes, 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) (bytes int64, err error) {
|
|
re, error := regexp.Compile("^(\\d+)([kKmMgG])?[bB]?$")
|
|
if error != nil {
|
|
return -1, error
|
|
}
|
|
|
|
matches := re.FindStringSubmatch(size)
|
|
|
|
if len(matches) != 3 {
|
|
return -1, fmt.Errorf("Invalid size: '%s'", size)
|
|
}
|
|
|
|
memLimit, error := strconv.ParseInt(matches[1], 10, 0)
|
|
if error != nil {
|
|
return -1, error
|
|
}
|
|
|
|
unit := strings.ToLower(matches[2])
|
|
|
|
if unit == "k" {
|
|
memLimit *= 1024
|
|
} else if unit == "m" {
|
|
memLimit *= 1024 * 1024
|
|
} else if unit == "g" {
|
|
memLimit *= 1024 * 1024 * 1024
|
|
}
|
|
|
|
return memLimit, nil
|
|
}
|