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#include "rawDataReader.h"
#include "helpers.h"
#include "streamSupport.h"
#include <cstring>
#include <iomanip>
#include <iostream>
namespace MyGrate {
RawDataReader::RawDataReader(const void * const d, std::size_t l) :
rawdata {static_cast<const std::byte *>(d)}, len {l}
{
}
RawDataReader::RawDataReader(const MARIADB_STRING & str) : RawDataReader {str.str, str.length} { }
void
RawDataReader::offsetSizeCheck(size_t l) const
{
if (offset + l > len) {
throw std::range_error("Read beyond end of data");
}
}
void
RawDataReader::discard(size_t d)
{
offset += d;
}
template<>
uint64_t
RawDataReader::readValue<PackedInteger>()
{
switch (const auto byte1 {readValue<uint8_t>()}) {
case 0 ... 250: // The value as-is
return byte1;
case 252: // 2 bytes
return readValue<uint16_t, 2>();
case 253: // 3 bytes
return readValue<uint32_t, 3>();
case 254: // 8 bytes
return readValue<uint64_t, 8>();
default:;
}
throw std::domain_error("Invalid first byte of packed integer");
}
}
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