/
memsize.go
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/
memsize.go
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// Copyright (c) 2016-2019 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package memsize
import (
"fmt"
)
// Defines number of bits in each bit unit.
const (
bit uint64 = 1 << (10 * iota)
Kbit
Mbit
Gbit
Tbit
)
// Defines number of bytes in each byte unit.
const (
B uint64 = 1 << (10 * iota)
KB
MB
GB
TB
)
type unit struct {
val uint64
str string
}
func format(units []unit, n uint64) (string, bool) {
for _, u := range units {
if n >= u.val {
f := float64(n) / float64(u.val)
return fmt.Sprintf("%.2f%s", f, u.str), true
}
}
return "", false
}
// Format returns a human readable representation for the given number of bytes.
func Format(bytes uint64) string {
units := []unit{
{TB, "TB"},
{GB, "GB"},
{MB, "MB"},
{KB, "KB"},
{B, "B"},
}
s, ok := format(units, bytes)
if !ok {
s = "0B"
}
return s
}
// BitFormat returns a human readable representation for the given number of bits.
func BitFormat(bits uint64) string {
units := []unit{
{Tbit, "Tbit"},
{Gbit, "Gbit"},
{Mbit, "Mbit"},
{Kbit, "Kbit"},
{1, "bit"},
}
s, ok := format(units, bits)
if !ok {
s = "0bit"
}
return s
}