int get_utf8(const char *buffer, int offset, unsigned int *code)
{
  *code = 0;

  /* 0x80 = b10000000 */
  if (isbitset(buffer[offset], 7))
  {
    *code |= ((int)buffer[offset + 1] & 0x7F) << 00;
    return 1;
  }
  if (isbitclear(buffer[offset], 5))
  {
    *code |= ((int)buffer[offset + 0] & 0x1F) << 06;
    *code |= ((int)buffer[offset + 1] & 0x3F) << 00;
    return 2;
  }
  if (isbitclear(buffer[offset], 4))
  {
    *code |= ((int)buffer[offset + 0] & 0x0E) << 12;
    *code |= ((int)buffer[offset + 1] & 0x3F) << 06;
    *code |= ((int)buffer[offset + 2] & 0x3F) << 00;
    return 3;
  }
  if (isbitclear(buffer[offset], 3))
  {
    *code |= ((int)buffer[offset + 0] & 0x07) << 18;
    *code |= ((int)buffer[offset + 1] & 0x3F) << 12;
    *code |= ((int)buffer[offset + 2] & 0x3F) << 06;
    *code |= ((int)buffer[offset + 3] & 0x3F) << 00;
    return 4;
  }
  if (isbitclear(buffer[offset], 2))
  {
    *code |= ((int)buffer[offset + 0] & 0x03) << 24;
    *code |= ((int)buffer[offset + 1] & 0x3F) << 18;
    *code |= ((int)buffer[offset + 2] & 0x3F) << 12;
    *code |= ((int)buffer[offset + 3] & 0x3F) << 06;
    *code |= ((int)buffer[offset + 4] & 0x3F) << 00;
    return 5;
  }
  if (isbitclear(buffer[offset], 1))
  {
    *code |= ((int)buffer[offset + 0] & 0x01) << 30;
    *code |= ((int)buffer[offset + 1] & 0x3F) << 24;
    *code |= ((int)buffer[offset + 2] & 0x3F) << 18;
    *code |= ((int)buffer[offset + 3] & 0x3F) << 12;
    *code |= ((int)buffer[offset + 4] & 0x3F) << 06;
    *code |= ((int)buffer[offset + 5] & 0x3F) << 00;
    return 6;
  }

  return 0;
}