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111 rivejä
2.1 KiB

package common
import (
"bytes"
"golang.org/x/text/encoding/simplifiedchinese"
"golang.org/x/text/transform"
"io/ioutil"
"math/rand"
"os"
"os/exec"
"runtime"
"strconv"
"time"
)
func Rand(min, max int) int {
if min > max {
panic("min: min cannot be greater than max")
}
if int31 := 1<<31 - 1; max > int31 {
panic("max: max can not be greater than " + strconv.Itoa(int31))
}
if min == max {
return min
}
r := rand.New(rand.NewSource(time.Now().UnixNano()))
return r.Intn(max+1-min) + min
}
func GbkToUtf8(s []byte) ([]byte, error) {
reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewDecoder())
d, e := ioutil.ReadAll(reader)
if e != nil {
return nil, e
}
return d, nil
}
func Utf8ToGbk(s []byte) ([]byte, error) {
reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewEncoder())
d, e := ioutil.ReadAll(reader)
if e != nil {
return nil, e
}
return d, nil
}
func NewRandStr(length int) string {
s:=[]string{
"a", "b", "c", "d", "e", "f",
"g", "h", "i", "j", "k", "l",
"m", "n", "o", "p", "q", "r",
"s", "t", "u", "v", "w", "x",
"y", "z", "A", "B", "C", "D",
"E", "F", "G", "H", "I", "J",
"K", "L", "M", "N", "O", "P",
"Q", "R", "S", "T", "U", "V",
"W", "X", "Y", "Z",
}
str:=""
for i:=1;i<=length;i++ {
r := rand.New(rand.NewSource(time.Now().UnixNano()))
str+=s[r.Intn(len(s)-1)]
}
return str
}
func Substr(s string,start,end int) string {
strRune:=[]rune(s)
if start==-1 {
return string(strRune[:end])
}
if end==-1 {
return string(strRune[start:])
}
return string(strRune[start:end])
}
func IsDir(path string) bool {
s, err := os.Stat(path)
if err != nil {
return false
}
return s.IsDir()
}
func Exists(path string) bool {
_, err := os.Stat(path)
if err != nil {
if os.IsExist(err) {
return true
}
return false
}
return true
}
func OpenImage(file string) {
if runtime.GOOS=="windows" {
cmd:=exec.Command("start",file)
_=cmd.Start()
}else{
if runtime.GOOS=="linux" {
cmd:=exec.Command("eog",file)
_=cmd.Start()
}else{
cmd:=exec.Command("open",file)
_=cmd.Start()
}
}
}