void
RecordSetInBase::parse_header_v1 (size_t const size)
{
assert (size > 1);
int off = 1;
off += uleb128_decode (head_ + off, size - off, size_);
if (gu_unlikely(static_cast<size_t>(size_) > static_cast<size_t>(size)))
{
gu_throw_error (EPROTO) << "RecordSet size " << size_
<< " exceeds buffer size " << size
<< "\nfirst 4 bytes: " << gu::Hexdump(head_, 4);
}
off += uleb128_decode (head_ + off, size - off, count_);
if (gu_unlikely(static_cast<size_t>(size_) < static_cast<size_t>(count_)))
{
gu_throw_error (EPROTO) << "Corrupted RecordSet header: count "
<< count_ << " exceeds size " << size_;
}
/* verify header CRC */
uint32_t const crc_comp(gu_fast_hash32(head_, off));
uint32_t const crc_orig(
gtoh(*(reinterpret_cast<const uint32_t*>(head_ + off))));
if (gu_unlikely(crc_comp != crc_orig))
{
gu_throw_error (EPROTO)
<< "RecordSet header CRC mismatch: "
<< std::showbase << std::internal << std::hex
<< std::setfill('0') << std::setw(10)
<< "\ncomputed: " << crc_comp
<< "\nfound: " << crc_orig << std::dec;
}
off += VER1_CRC_SIZE;
/* checksum is between header and records */
begin_ = off + check_size(check_type_);
}
inline size_t uleb128_decode(const byte_t* buf,
size_t buflen,
UI& value)
{
return uleb128_decode(buf, buflen, 0, value);
}