Struct LogFile 

pub struct LogFile { /* private fields */ }

Redo log file reader.

Implementations

impl LogFile

pub fn open(path: &str) -> Result<Self, IdbError>

Open a redo log file.

pub fn from_bytes(data: Vec<u8>) -> Result<Self, IdbError>

Create a log file reader from an in-memory byte buffer.

The buffer must be at least 2048 bytes (4 blocks of 512 bytes each for the header and checkpoint blocks).

Examples

use idb::innodb::log::LogFile;

// Build a minimal valid redo log (4 header blocks + 1 data block)
let data = vec![0u8; 512 * 5];
let mut log = LogFile::from_bytes(data).unwrap();
let header = log.read_header().unwrap();
println!("Created by: {}", header.created_by);

pub fn block_count(&self) -> u64

Total number of 512-byte blocks in the file.

pub fn data_block_count(&self) -> u64

Number of data blocks (excluding the 4 header/checkpoint blocks).

pub fn read_block(&mut self, block_no: u64) -> Result<Vec<u8>, IdbError>

Read a single 512-byte block by block number.

pub fn read_header(&mut self) -> Result<LogFileHeader, IdbError>

Read and parse the log file header (block 0).

pub fn read_checkpoint(&mut self, slot: u8) -> Result<LogCheckpoint, IdbError>

Read and parse a checkpoint (slot 0 = block 1, slot 1 = block 3).

pub fn file_size(&self) -> u64

File size in bytes.