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#include <Core/MySQL/IMySQLWritePacket.h>
#include <IO/MySQLPacketPayloadWriteBuffer.h>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
namespace MySQLProtocol
{
void IMySQLWritePacket::writePayload(WriteBuffer & buffer, uint8_t & sequence_id) const
{
MySQLPacketPayloadWriteBuffer buf(buffer, getPayloadSize(), sequence_id);
writePayloadImpl(buf);
buf.finalize();
if (buf.remainingPayloadSize())
{
throw Exception(ErrorCodes::LOGICAL_ERROR, "Incomplete payload. Written {} bytes, expected {} bytes.",
getPayloadSize() - buf.remainingPayloadSize(), getPayloadSize());
}
}
size_t getLengthEncodedNumberSize(uint64_t x)
{
if (x < 251)
{
return 1;
}
else if (x < (1 << 16))
{
return 3;
}
else if (x < (1 << 24))
{
return 4;
}
else
{
return 9;
}
}
size_t getLengthEncodedStringSize(const String & s)
{
return getLengthEncodedNumberSize(s.size()) + s.size();
}
void writeLengthEncodedNumber(uint64_t x, WriteBuffer & buffer)
{
if (x < 251)
{
buffer.write(static_cast<char>(x));
}
else if (x < (1 << 16))
{
buffer.write(0xfc);
buffer.write(reinterpret_cast<char *>(&x), 2);
}
else if (x < (1 << 24))
{
buffer.write(0xfd);
buffer.write(reinterpret_cast<char *>(&x), 3);
}
else
{
buffer.write(0xfe);
buffer.write(reinterpret_cast<char *>(&x), 8);
}
}
void writeLengthEncodedString(const String & s, WriteBuffer & buffer)
{
writeLengthEncodedNumber(s.size(), buffer);
buffer.write(s.data(), s.size());
}
void writeNulTerminatedString(const String & s, WriteBuffer & buffer)
{
buffer.write(s.data(), s.size());
buffer.write(0);
}
}
}
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