path: root/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/util.go

// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package leveldb

import (
    "fmt"
    "sort"

    "github.com/syndtr/goleveldb/leveldb/storage"
)

func shorten(str string) string {
    if len(str) <= 4 {
        return str
    }
    return str[:1] + ".." + str[len(str)-1:]
}

var bunits = [...]string{"", "Ki", "Mi", "Gi"}

func shortenb(bytes int) string {
    i := 0
    for ; bytes > 1024 && i < 4; i++ {
        bytes /= 1024
    }
    return fmt.Sprintf("%d%sB", bytes, bunits[i])
}

func sshortenb(bytes int) string {
    if bytes == 0 {
        return "~"
    }
    sign := "+"
    if bytes < 0 {
        sign = "-"
        bytes *= -1
    }
    i := 0
    for ; bytes > 1024 && i < 4; i++ {
        bytes /= 1024
    }
    return fmt.Sprintf("%s%d%sB", sign, bytes, bunits[i])
}

func sint(x int) string {
    if x == 0 {
        return "~"
    }
    sign := "+"
    if x < 0 {
        sign = "-"
        x *= -1
    }
    return fmt.Sprintf("%s%d", sign, x)
}

func minInt(a, b int) int {
    if a < b {
        return a
    }
    return b
}

func maxInt(a, b int) int {
    if a > b {
        return a
    }
    return b
}

type files []storage.File

func (p files) Len() int {
    return len(p)
}

func (p files) Less(i, j int) bool {
    return p[i].Num() < p[j].Num()
}

func (p files) Swap(i, j int) {
    p[i], p[j] = p[j], p[i]
}

func (p files) sort() {
    sort.Sort(p)
}