You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
150 lines
2.5 KiB
150 lines
2.5 KiB
package util
|
|
|
|
import (
|
|
"crypto/md5"
|
|
"crypto/rand"
|
|
"encoding/base64"
|
|
"fmt"
|
|
"io"
|
|
)
|
|
|
|
// BytesToHumanReadable returns the converted human readable representation of the bytes.
|
|
func BytesToHumanReadable(b uint64) string {
|
|
const unit = 1024
|
|
if b < unit {
|
|
return fmt.Sprintf("%d B", b)
|
|
}
|
|
|
|
div, exp := uint64(unit), 0
|
|
for n := b / unit; n >= unit; n /= unit {
|
|
div *= unit
|
|
exp++
|
|
}
|
|
|
|
return fmt.Sprintf("%.2f %ciB", float64(b)/float64(div), "KMGTPE"[exp])
|
|
}
|
|
|
|
// big endian
|
|
|
|
func BytesToUint64(b []byte) (v uint64) {
|
|
length := uint(len(b))
|
|
for i := uint(0); i < length-1; i++ {
|
|
v += uint64(b[i])
|
|
v <<= 8
|
|
}
|
|
v += uint64(b[length-1])
|
|
return
|
|
}
|
|
func BytesToUint32(b []byte) (v uint32) {
|
|
length := uint(len(b))
|
|
for i := uint(0); i < length-1; i++ {
|
|
v += uint32(b[i])
|
|
v <<= 8
|
|
}
|
|
v += uint32(b[length-1])
|
|
return
|
|
}
|
|
func BytesToUint16(b []byte) (v uint16) {
|
|
v += uint16(b[0])
|
|
v <<= 8
|
|
v += uint16(b[1])
|
|
return
|
|
}
|
|
func Uint64toBytes(b []byte, v uint64) {
|
|
for i := uint(0); i < 8; i++ {
|
|
b[7-i] = byte(v >> (i * 8))
|
|
}
|
|
}
|
|
func Uint32toBytes(b []byte, v uint32) {
|
|
for i := uint(0); i < 4; i++ {
|
|
b[3-i] = byte(v >> (i * 8))
|
|
}
|
|
}
|
|
func Uint16toBytes(b []byte, v uint16) {
|
|
b[0] = byte(v >> 8)
|
|
b[1] = byte(v)
|
|
}
|
|
func Uint8toBytes(b []byte, v uint8) {
|
|
b[0] = byte(v)
|
|
}
|
|
|
|
// returns a 64 bit big int
|
|
func HashStringToLong(dir string) (v int64) {
|
|
h := md5.New()
|
|
io.WriteString(h, dir)
|
|
|
|
b := h.Sum(nil)
|
|
|
|
v += int64(b[0])
|
|
v <<= 8
|
|
v += int64(b[1])
|
|
v <<= 8
|
|
v += int64(b[2])
|
|
v <<= 8
|
|
v += int64(b[3])
|
|
v <<= 8
|
|
v += int64(b[4])
|
|
v <<= 8
|
|
v += int64(b[5])
|
|
v <<= 8
|
|
v += int64(b[6])
|
|
v <<= 8
|
|
v += int64(b[7])
|
|
|
|
return
|
|
}
|
|
|
|
func HashToInt32(data []byte) (v int32) {
|
|
h := md5.New()
|
|
h.Write(data)
|
|
|
|
b := h.Sum(nil)
|
|
|
|
v += int32(b[0])
|
|
v <<= 8
|
|
v += int32(b[1])
|
|
v <<= 8
|
|
v += int32(b[2])
|
|
v <<= 8
|
|
v += int32(b[3])
|
|
|
|
return
|
|
}
|
|
|
|
func Base64Encode(data []byte) string {
|
|
return base64.StdEncoding.EncodeToString(data)
|
|
}
|
|
|
|
func Base64Md5(data []byte) string {
|
|
return Base64Encode(Md5(data))
|
|
}
|
|
|
|
func Md5(data []byte) []byte {
|
|
hash := md5.New()
|
|
hash.Write(data)
|
|
return hash.Sum(nil)
|
|
}
|
|
|
|
func Md5String(data []byte) string {
|
|
return fmt.Sprintf("%x", Md5(data))
|
|
}
|
|
|
|
func Base64Md5ToBytes(contentMd5 string) []byte {
|
|
data, err := base64.StdEncoding.DecodeString(contentMd5)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
return data
|
|
}
|
|
|
|
func RandomInt32() int32 {
|
|
buf := make([]byte, 4)
|
|
rand.Read(buf)
|
|
return int32(BytesToUint32(buf))
|
|
}
|
|
|
|
func RandomBytes(byteCount int) []byte {
|
|
buf := make([]byte, byteCount)
|
|
rand.Read(buf)
|
|
return buf
|
|
}
|