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add own version of utf8 getbytes. More recent .net versions (core?) do have similar, but not want got there now, besides only similar..

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UbitUmarov
2020-05-21 22:41:15 +01:00
parent 6e0d82f584
commit 8d8ead9776
2 changed files with 177 additions and 121 deletions
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93
OpenSim/Region/ClientStack/Linden/UDP/LLUDPZeroEncoder.cs
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@@ -135,6 +135,34 @@ namespace OpenSim.Region.ClientStack.LindenUDP
}
}
public unsafe void AddBytes(byte* src, int srclen)
{
for (int i = 0; i < srclen; ++i)
{
if (src[i] == 0x00)
{
zerocount++;
if (zerocount == 0)
{
m_dest[pos++] = 0x00;
m_dest[pos++] = 0xff;
zerocount++;
}
}
else
{
if (zerocount != 0)
{
m_dest[pos++] = 0x00;
m_dest[pos++] = (byte)zerocount;
zerocount = 0;
}
m_dest[pos++] = src[i];
}
}
}
public unsafe void AddByte(byte v)
{
if (v == 0x00)
@@ -278,7 +306,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
}
// maxlen <= 255 and includes null termination byte
public void AddShortString(string str, int maxlen)
public unsafe void AddShortString(string str, int maxlen)
{
if (String.IsNullOrEmpty(str))
{
@@ -286,33 +314,21 @@ namespace OpenSim.Region.ClientStack.LindenUDP
return;
}
--maxlen; // account for null term
bool NullTerm = str.EndsWith("\0");
byte* data = stackalloc byte[maxlen];
int len = Util.osUTF8Getbytes(str, data, maxlen, true);
byte[] data = Util.UTF8.GetBytes(str);
int len = data.Length;
if(NullTerm)
--len;
if(len <= maxlen)
if (len == 0)
{
AddByte((byte)(len + 1));
AddBytes(data, len);
AddZeros(1);
return;
}
if ((data[maxlen] & 0x80) != 0)
{
while (maxlen > 0 && (data[maxlen] & 0xc0) != 0xc0)
maxlen--;
}
AddByte((byte)(maxlen + 1));
AddBytes(data, maxlen);
AddZeros(1);
AddByte((byte)(len));
AddBytes(data, len);
}
// maxlen <= 255 and includes null termination byte, maxchars == max len of utf8 source
public void AddShortString(string str, int maxchars, int maxlen)
// maxlen <= 255 and includes null termination byte, maxchars == max len of utf16 source
public unsafe void AddShortString(string str, int maxchars, int maxlen)
{
if (String.IsNullOrEmpty(str))
{
@@ -320,42 +336,21 @@ namespace OpenSim.Region.ClientStack.LindenUDP
return;
}
--maxlen; // account for null term
bool NullTerm = false;
byte[] data;
if (str.Length > maxchars)
{
data = Util.UTF8.GetBytes(str.Substring(0,maxchars));
}
else
{
NullTerm = str.EndsWith("\0");
data = Util.UTF8.GetBytes(str);
}
str = str.Substring(0, maxchars);
int len = data.Length;
if (NullTerm)
--len;
byte* data = stackalloc byte[maxlen];
int len = Util.osUTF8Getbytes(str, data, maxlen, true);
if (len <= maxlen)
if (len == 0)
{
AddByte((byte)(len + 1));
AddBytes(data, len);
AddZeros(1);
return;
}
if ((data[maxlen] & 0x80) != 0)
{
while (maxlen > 0 && (data[maxlen] & 0xc0) != 0xc0)
maxlen--;
}
AddByte((byte)(maxlen + 1));
AddBytes(data, maxlen);
AddZeros(1);
AddByte((byte)(len));
AddBytes(data, len);
}
}
}
}