Add HasBitFlag, SetBitFlag, UnSetBitFlag

sysutils.go

@@ -1,18 +1,18 @@
 package q5
 
 import (
-	"os"
-	"net"
-	"fmt"
-	"net/http"
-	"time"
-	"io/ioutil"
-	"reflect"
 	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"os"
+	"reflect"
+	"time"
 )
 
 func GetDaySeconds(seconds int64, timeZone int64) int64 {
-	return ((seconds + timeZone * 3600)/3600/24 + 1) * 3600 * 24 - 3600 * timeZone;
+	return ((seconds+timeZone*3600)/3600/24+1)*3600*24 - 3600*timeZone
 }
 
 func GetTickCount() int64 {
@@ -130,3 +130,29 @@ func FormatUnixDateEx(sec int64) string {
 	strTime := time.Unix(sec, 0).Format("20060102")
 	return strTime
 }
+
+const (
+	maxBitNum = 63 // 最大的有效位号，根据 int64 的位宽确定
+)
+
+func HasBitFlag(val int64, bitNum int32) bool {
+	if bitNum < 0 || bitNum > maxBitNum {
+		return false
+	}
+	mask := int64(1) << bitNum
+	return (val & mask) != 0
+}
+
+func SetBitFlag(val *int64, bitNum int32) {
+	if bitNum < 0 || bitNum > maxBitNum {
+		return
+	}
+	*val |= int64(1) << bitNum
+}
+
+func UnSetBitFlag(val *int64, bitNum int32) {
+	if bitNum < 0 || bitNum > maxBitNum {
+		return
+	}
+	*val &= ^(int64(1) << bitNum)
+}