Function WideToUtf

Libraries/unrar/unicode.cpp:255–294

void WideToUtf(const wchar *Src,char *Dest,size_t DestSize)
{
  long dsize=(long)DestSize;
  dsize--;
  while (*Src!=0 && --dsize>=0)
  {
    uint c=*(Src++);
    if (c<0x80)
      *(Dest++)=c;
    else
      if (c<0x800 && --dsize>=0)
      {
        *(Dest++)=(0xc0|(c>>6));
        *(Dest++)=(0x80|(c&0x3f));
      }
      else
      {
        if (c>=0xd800 && c<=0xdbff && *Src>=0xdc00 && *Src<=0xdfff) // Surrogate pair.
        {
          c=((c-0xd800)<<10)+(*Src-0xdc00)+0x10000;
          Src++;
        }
        if (c<0x10000 && (dsize-=2)>=0)
        {
          *(Dest++)=(0xe0|(c>>12));
          *(Dest++)=(0x80|((c>>6)&0x3f));
          *(Dest++)=(0x80|(c&0x3f));
        }
        else
          if (c < 0x200000 && (dsize-=3)>=0)
          {
            *(Dest++)=(0xf0|(c>>18));
            *(Dest++)=(0x80|((c>>12)&0x3f));
            *(Dest++)=(0x80|((c>>6)&0x3f));
            *(Dest++)=(0x80|(c&0x3f));
          }
      }
  }
  *Dest=0;
}


size_t WideToUtfSize(const wchar *Src)