internal static unsafe void TerminateImpl(Base64Info *ptr_info, UnsafeRefToNativeList <Char16> buff)
{
uint tmp = ptr_info->store;
switch (ptr_info->bytePos)
{
case 0:
// do nothing
break;
case 1:
// two character padding needed
buff.Add(Base64EncodeTable.Get((tmp & 0xfc) >> 2));
buff.Add(Base64EncodeTable.Get((tmp & 0x03) << 4));
buff.Add(Base64EncodeTable.Get(64)); // pad
buff.Add(Base64EncodeTable.Get(64)); // pad
break;
case 2:
// one character padding needed
buff.Add(Base64EncodeTable.Get((tmp & 0xfc00) >> 10));
buff.Add(Base64EncodeTable.Get((tmp & 0x03f0) >> 4));
buff.Add(Base64EncodeTable.Get((tmp & 0x000f) << 2));
buff.Add(Base64EncodeTable.Get(64)); // pad
break;
}
ptr_info->store = 0;
ptr_info->bytePos = 0;
}
internal static unsafe void GetCharsImpl(Base64Info *ptr_info,
UnsafeRefToNativeList <Char16> buff,
byte *byte_ptr, int byte_len, bool splitData)
{
CheckLengthIsPositive(byte_len);
uint store = ptr_info->store;
int bytePos = ptr_info->bytePos;
int charcount = 0;
for (uint i = 0; i < byte_len; i++)
{
if (ptr_info->insertLF)
{
if (charcount == Base64Const.LineBreakPos)
{
buff.Add(UTF16CodeSet.code_CR);
buff.Add(UTF16CodeSet.code_LF);
charcount = 0;
}
}
store = (store << 8) | byte_ptr[i];
bytePos++;
// encoding 3 bytes -> 4 chars
if (bytePos == 3)
{
buff.Add(Base64EncodeTable.Get((store & 0xfc0000) >> 18));
buff.Add(Base64EncodeTable.Get((store & 0x03f000) >> 12));
buff.Add(Base64EncodeTable.Get((store & 0x000fc0) >> 6));
buff.Add(Base64EncodeTable.Get((store & 0x00003f)));
charcount += 4;
store = 0;
bytePos = 0;
}
}
ptr_info->store = store;
ptr_info->bytePos = bytePos;
if (!splitData)
{
TerminateImpl(ptr_info, buff);
}
}