pub const XACT_XINFO_HAS_DROPPED_STATS: u32 = 1u32 << 8;

pub const XLOG_DBASE_CREATE_FILE_COPY: u8 = 0x00;
pub const XLOG_DBASE_CREATE_WAL_LOG: u8 = 0x10;
pub const XLOG_DBASE_DROP: u8 = 0x20;

pub const BKPIMAGE_APPLY: u8 = 0x02; /* page image should be restored during replay */
pub const BKPIMAGE_COMPRESS_PGLZ: u8 = 0x04; /* page image is compressed */
pub const BKPIMAGE_COMPRESS_LZ4: u8 = 0x08; /* page image is compressed */
pub const BKPIMAGE_COMPRESS_ZSTD: u8 = 0x10; /* page image is compressed */

pub const SIZEOF_RELMAPFILE: usize = 524; /* sizeof(RelMapFile) in relmapper.c */

// List of subdirectories inside pgdata.
// Copied from src/bin/initdb/initdb.c
pub const PGDATA_SUBDIRS: [&str; 23] = [
    "global",
    "pg_wal/archive_status",
    "pg_wal/summaries",
    "pg_commit_ts",
    "pg_dynshmem",
    "pg_notify",
    "pg_serial",
    "pg_snapshots",
    "pg_subtrans",
    "pg_twophase",
    "pg_multixact",
    "pg_multixact/members",
    "pg_multixact/offsets",
    "base",
    "base/1",
    "pg_replslot",
    "pg_tblspc",
    "pg_stat",
    "pg_stat_tmp",
    "pg_xact",
    "pg_logical",
    "pg_logical/snapshots",
    "pg_logical/mappings",
];

pub fn bkpimg_is_compressed(bimg_info: u8) -> bool {
    const ANY_COMPRESS_FLAG: u8 = BKPIMAGE_COMPRESS_PGLZ | BKPIMAGE_COMPRESS_LZ4 | BKPIMAGE_COMPRESS_ZSTD;

    (bimg_info & ANY_COMPRESS_FLAG) != 0
}


pub const XLOG_HEAP2_PRUNE_ON_ACCESS: u8 = 0x10;
pub const XLOG_HEAP2_PRUNE_VACUUM_SCAN: u8 = 0x20;
pub const XLOG_HEAP2_PRUNE_VACUUM_CLEANUP: u8 = 0x30;


pub const XLOG_OVERWRITE_CONTRECORD: u8 = 0xD0;
pub const XLOG_CHECKPOINT_REDO: u8 = 0xE0;