/// <summary>
/// Write utf-8 string
/// </summary>
/// <param name="val">string</param>
/// <param name="strPrefixByteLen">string prefix byte len</param>
/// <param name="isWriteEndChar">is Write End Char</param>
/// <param name="isPrefixContainEndCharByteLen">is Prefix Contain EndChar Byte Len</param>
/// <returns>bool</returns>
public bool WriteUTF8(string val, EStringPrefixLen strPrefixByteLen = EStringPrefixLen.Int32,
bool isWriteEndChar = true, bool isPrefixContainEndCharByteLen = true)
{
if (!isWriteEndChar)
{
isPrefixContainEndCharByteLen = false;
}
byte[] buf = new byte[0];
if (!string.IsNullOrEmpty(val))
{
buf = Encoding.UTF8.GetBytes(val);
}
int prefixVal = buf.Length;
if (isWriteEndChar && isPrefixContainEndCharByteLen)
{
prefixVal += 1;
}
int len = (int)strPrefixByteLen + buf.Length;
if (isWriteEndChar)
{
len += 1;
}
if (ms.AvaliableWrite() >= len)
{
switch (strPrefixByteLen)
{
case EStringPrefixLen.Byte:
WriteByte((byte)prefixVal);
break;
case EStringPrefixLen.Int16:
WriteUInt16((UInt16)prefixVal);
break;
case EStringPrefixLen.Int32:
WriteUInt32((UInt32)prefixVal);
break;
case EStringPrefixLen.Int64:
WriteUInt64((UInt64)prefixVal);
break;
}
ms.Write(buf, 0, buf.Length);
if (isWriteEndChar)
{
WriteByte(0);
}
return(true);
}
return(false);
}
/// <summary>
/// Get String Byte Count
/// </summary>
/// <param name="str">str</param>
/// <param name="encode">encode</param>
/// <param name="prefix">prefix</param>
/// <param name="hasEndChar">has EndChar</param>
/// <returns></returns>
public static int GetStringByteCount(string str, Encoding encode,
EStringPrefixLen prefix = EStringPrefixLen.Int32, bool hasEndChar = true)
{
int count = (int)prefix;
if (!string.IsNullOrEmpty(str))
{
count += encode.GetByteCount(str);
}
if (hasEndChar)
{
count += GetStringEndCharByteLength(encode);
}
return(count);
}
/// <summary>
/// Read UTF-8 string
/// </summary>
/// <param name="strPrefixByteLen">string prefix byte len</param>
/// <param name="hasEndChar">has EndChar</param>
/// <param name="isPrefixContainEndCharByteLen">is Prefix Contain EndChar Byte Len</param>
/// <returns>string</returns>
public string ReadUTF8Prefix(EStringPrefixLen strPrefixByteLen = EStringPrefixLen.Int32,
bool hasEndChar = true, bool isPrefixContainEndCharByteLen = true)
{
string result = "";
if (!hasEndChar)
{
isPrefixContainEndCharByteLen = false;
}
int len = 0;
switch (strPrefixByteLen)
{
case EStringPrefixLen.Byte:
len = ReadByte();
break;
case EStringPrefixLen.Int16:
len = ReadUInt16();
break;
case EStringPrefixLen.Int32:
len = (int)ReadUInt32();
break;
case EStringPrefixLen.Int64:
len = (int)ReadUInt64();
break;
}
if (hasEndChar && !isPrefixContainEndCharByteLen)
{
len += 1;
}
if (ms.AvaliableRead() >= len)
{
result = ReadUTF8(len);
}
return(result);
}
/// <summary>
/// Get String Byte Count
/// </summary>
/// <param name="str">str</param>
/// <param name="prefix">prefix</param>
/// <param name="hasEndChar">has EndChar</param>
/// <returns></returns>
public static int GetStringByteCount(string str,
EStringPrefixLen prefix = EStringPrefixLen.Int32, bool hasEndChar = true)
{
return(GetStringByteCount(str, Encoding.UTF8, prefix, hasEndChar));
}
