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