69 lines
1.8 KiB
C#
69 lines
1.8 KiB
C#
using System.Text;
|
||
|
||
namespace NB.Map;
|
||
|
||
public static class RoomHelper
|
||
{
|
||
#region 房间id
|
||
|
||
private const string Base36Chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
|
||
private const int RoomSeqBits = 16; // 每个服务最多 65535 个房间
|
||
|
||
/// <summary>
|
||
/// 生成房间码（固定5位）
|
||
/// </summary>
|
||
/// <param name="serviceId"></param>
|
||
/// <param name="roomSeq"></param>
|
||
/// <returns></returns>
|
||
public static string GenerateCode(uint serviceId, int roomSeq)
|
||
{
|
||
long packed = ((long)serviceId << RoomSeqBits) | (uint)roomSeq;
|
||
string code = EncodeBase36(packed);
|
||
|
||
// 固定5位，不够左侧补0
|
||
return code.PadLeft(5, '0');
|
||
}
|
||
|
||
/// <summary>
|
||
/// 解析房间码
|
||
/// </summary>
|
||
/// <param name="code"></param>
|
||
/// <param name="serviceId"></param>
|
||
/// <param name="roomSeq"></param>
|
||
public static void ParseCode(string code, out uint serviceId, out int roomSeq)
|
||
{
|
||
long packed = DecodeBase36(code);
|
||
roomSeq = (int)(packed & ((1 << RoomSeqBits) - 1));
|
||
serviceId = (uint)(packed >> RoomSeqBits);
|
||
}
|
||
|
||
private static string EncodeBase36(long value)
|
||
{
|
||
if (value == 0) return "0";
|
||
StringBuilder sb = new StringBuilder();
|
||
while (value > 0)
|
||
{
|
||
int remainder = (int)(value % 36);
|
||
sb.Insert(0, Base36Chars[remainder]);
|
||
value /= 36;
|
||
}
|
||
|
||
return sb.ToString();
|
||
}
|
||
|
||
private static long DecodeBase36(string str)
|
||
{
|
||
long result = 0;
|
||
foreach (char c in str)
|
||
{
|
||
int val = Base36Chars.IndexOf(c);
|
||
if (val < 0) throw new ArgumentException("Invalid Base36 character: " + c);
|
||
result = result * 36 + val;
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
#endregion
|
||
|
||
} |