public static String ReadString(byte strFlag, Stream ms)
{
//
//fixstr stores a byte array whose length is upto 31 bytes:
//+--------+========+
//|101XXXXX| data |
//+--------+========+
//
//str 8 stores a byte array whose length is upto (2^8)-1 bytes:
//+--------+--------+========+
//| 0xd9 |YYYYYYYY| data |
//+--------+--------+========+
//
//str 16 stores a byte array whose length is upto (2^16)-1 bytes:
//+--------+--------+--------+========+
//| 0xda |ZZZZZZZZ|ZZZZZZZZ| data |
//+--------+--------+--------+========+
//
//str 32 stores a byte array whose length is upto (2^32)-1 bytes:
//+--------+--------+--------+--------+--------+========+
//| 0xdb |AAAAAAAA|AAAAAAAA|AAAAAAAA|AAAAAAAA| data |
//+--------+--------+--------+--------+--------+========+
//
//where
//* XXXXX is a 5-bit unsigned integer which represents N
//* YYYYYYYY is a 8-bit unsigned integer which represents N
//* ZZZZZZZZ_ZZZZZZZZ is a 16-bit big-endian unsigned integer which represents N
//* AAAAAAAA_AAAAAAAA_AAAAAAAA_AAAAAAAA is a 32-bit big-endian unsigned integer which represents N
//* N is the length of data
byte[] rawBytes = null;
int len = 0;
if ((strFlag >= 0xA0) && (strFlag <= 0xBF))
{
len = strFlag - 0xA0;
}
else if (strFlag == 0xD9)
{
len = ms.ReadByte();
}
else if (strFlag == 0xDA)
{
rawBytes = new byte[2];
ms.Read(rawBytes, 0, 2);
rawBytes = BytesTools.SwapBytes(rawBytes);
len = BitConverter.ToUInt16(rawBytes, 0);
}
else if (strFlag == 0xDB)
{
rawBytes = new byte[4];
ms.Read(rawBytes, 0, 4);
rawBytes = BytesTools.SwapBytes(rawBytes);
len = BitConverter.ToInt32(rawBytes, 0);
}
rawBytes = new byte[len];
ms.Read(rawBytes, 0, len);
return(BytesTools.GetString(rawBytes));
}
public static String ReadString(Stream ms, int len)
{
byte[] rawBytes = new byte[len];
ms.Read(rawBytes, 0, len);
return(BytesTools.GetString(rawBytes));
}