#include <config.h>
#include <xapian/error.h>
#include "chert_btreebase.h"
#include "errno_to_string.h"
#include "fd.h"
#include "io_utils.h"
#include "omassert.h"
#include "pack.h"
#include "posixy_wrapper.h"
#include "str.h"
#include <algorithm>
#include <cerrno>
#include <climits>
#include <cstring>

Include dependency graph for chert_btreebase.cc:

Macros
#define	CURR_FORMAT 5U
	This is the current description of the base file format: More...

#define	DO_UNPACK_UINT_ERRCHECK(start, end, var)

#define	REASONABLE_BASE_SIZE 1024

#define	BIT_MAP_INC 1000

Functions
static bool	do_unpack_uint (const char *start, const char end, uint4 dest, string &err_msg, const string &basename, const char varname)
	Do most of the error handling from unpack_uint() More...

static bool	do_unpack_uint (const char *start, const char end, chert_tablesize_t dest, string &err_msg, const string &basename, const char varname)

Macro Definition Documentation

◆ BIT_MAP_INC

#define BIT_MAP_INC 1000

Definition at line 386 of file chert_btreebase.cc.

Referenced by ChertTable_base::extend_bit_map().

◆ CURR_FORMAT

#define CURR_FORMAT 5U

This is the current description of the base file format:

Numbers are (unless mentioned otherwise) stored in the variable length format used by pack_uint() - that is 7 bits at a time in a byte, starting with lower-order bits, and setting the high bit on all bytes before the last one.

The format consists of a sequence of numbers in this order:

REVISION FORMAT will be = CURR_FORMAT for the current format. If this value higher then it is a different format which we doesn't yet understand, so we bomb out. If it's lower, then it depends if we have backwards-compatibility code implemented (we don't for format versions < 5). BLOCK_SIZE ROOT LEVEL BIT_MAP_SIZE ITEM_COUNT LAST_BLOCK HAVE_FAKEROOT SEQUENTIAL REVISION2 A second copy of the revision number, for consistency checks. BITMAP The bitmap. This will be BIT_MAP_SIZE raw bytes. REVISION3 A third copy of the revision number, for consistency checks.

Definition at line 72 of file chert_btreebase.cc.

Referenced by ChertTable_base::read(), and ChertTable_base::write_to_file().

◆ DO_UNPACK_UINT_ERRCHECK

#define DO_UNPACK_UINT_ERRCHECK	(	start,
		end,
		var
	)

Value:

do { \
    if (!do_unpack_uint(start, end, &var, err_msg, basename, #var)) { \
        return false; \
    } \
} while (0)

Definition at line 150 of file chert_btreebase.cc.

Referenced by ChertTable_base::read().

◆ REASONABLE_BASE_SIZE

#define REASONABLE_BASE_SIZE 1024

Definition at line 163 of file chert_btreebase.cc.

Referenced by ChertTable_base::read().

Function Documentation

◆ do_unpack_uint() [1/2]

static bool do_unpack_uint	(	const char **	start,
		const char *	end,
		uint4 *	dest,
		string &	err_msg,
		const string &	basename,
		const char *	varname
	)

static

Do most of the error handling from unpack_uint()

Definition at line 117 of file chert_btreebase.cc.

References rare, and unpack_uint().

◆ do_unpack_uint() [2/2]

static bool do_unpack_uint	(	const char **	start,
		const char *	end,
		chert_tablesize_t *	dest,
		string &	err_msg,
		const string &	basename,
		const char *	varname
	)