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49 lines
1015 B
Go
49 lines
1015 B
Go
package util
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import (
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"context"
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"os"
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"os/signal"
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"path/filepath"
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"runtime"
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"syscall"
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)
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var Null = struct{}{}
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func Clone[T any](x T) *T {
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return &x
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}
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func CurrentDir(path ...string) string {
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if _, currentFilePath, _, _ := runtime.Caller(1); len(path) == 0 {
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return filepath.Dir(currentFilePath)
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} else {
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return filepath.Join(filepath.Dir(currentFilePath), filepath.Join(path...))
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}
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}
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// 检查文件或目录是否存在
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// 如果由 filename 指定的文件或目录存在则返回 true，否则返回 false
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func Exist(filename string) bool {
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_, err := os.Stat(filename)
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return err == nil || os.IsExist(err)
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}
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func ConvertNum[F Integer, T Integer](from F, to T) T {
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return T(from)
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}
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// Bit1 检查字节中的某一位是否为1 |0|1|2|3|4|5|6|7|
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func Bit1(b byte, index int) bool {
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return b&(1<<(7-index)) != 0
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}
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func WaitTerm(cancel context.CancelFunc) {
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sigc := make(chan os.Signal, 1)
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signal.Notify(sigc, syscall.SIGINT, syscall.SIGTERM)
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defer signal.Stop(sigc)
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<-sigc
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cancel()
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}
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