bblog_file_header Struct Reference

BBLogger file header definition. More...

#include <file.h>

List of all members.

Public Attributes
uint32_t	file_magic
	Magic value to identify file, must be 0xFFBBFFBB (big endian).
uint32_t	file_version
	File version, set to BBLOGGER_FILE_VERSION on write and verify on read (big endian).
uint32_t	endianess: 1
	Endianess, 0 little endian, 1 big endian.
uint32_t	reserved: 31
	Reserved for future use.
uint32_t	num_data_items
	Number of data items in file, if set to zero reader must scan the file for this number.
char	scenario [BBLOG_SCENARIO_SIZE]
	Scenario as defined in config.
char	interface_type [BBLOG_INTERFACE_TYPE_SIZE]
	Interface type.
char	interface_id [BBLOG_INTERFACE_ID_SIZE]
	Interface ID.
unsigned char	interface_hash [BBLOG_INTERFACE_HASH_SIZE]
	Interface Hash.
uint32_t	data_size
	size of one interface data block
uint64_t	start_time_sec
	Start time, timestamp seconds.
uint64_t	start_time_usec
	Start time, timestamp microseconds.

---

Detailed Description

BBLogger file header definition.

To identify log files created for different interfaces but belonging to a single run files must be

• created at the exact same timestamp (filename and start_time_* fields
• have the same scenario id The file_version is stored in network byte order. Anything beyond this is stored in the native system format, read the endianess field to check whether you must do data conversion.

Definition at line 53 of file file.h.

---

Member Data Documentation

uint32_t bblog_file_header::data_size

size of one interface data block

Definition at line 67 of file file.h.

Referenced by BBLogFile::data_size(), BBLogFile::print_info(), BBLogFile::read_index(), BBLogFile::read_next(), and BBLogFile::remaining_entries().

uint32_t bblog_file_header::endianess

Endianess, 0 little endian, 1 big endian.

Definition at line 58 of file file.h.

Referenced by BBLogFile::is_big_endian(), and BBLogFile::print_info().

uint32_t bblog_file_header::file_magic

Magic value to identify file, must be 0xFFBBFFBB (big endian).

Definition at line 54 of file file.h.

uint32_t bblog_file_header::file_version

File version, set to BBLOGGER_FILE_VERSION on write and verify on read (big endian).

Definition at line 56 of file file.h.

Referenced by BBLogFile::file_version(), and BBLogFile::print_info().

unsigned char bblog_file_header::interface_hash[BBLOG_INTERFACE_HASH_SIZE]

Interface Hash.

Definition at line 66 of file file.h.

Referenced by BBLogFile::interface_hash(), BBLogFile::print_info(), and BBLogFile::set_interface().

char bblog_file_header::interface_id[BBLOG_INTERFACE_ID_SIZE]

Interface ID.

Definition at line 65 of file file.h.

char bblog_file_header::interface_type[BBLOG_INTERFACE_TYPE_SIZE]

Interface type.

Definition at line 64 of file file.h.

uint32_t bblog_file_header::num_data_items

Number of data items in file, if set to zero reader must scan the file for this number.

Definition at line 60 of file file.h.

Referenced by BBLogFile::num_data_items(), BBLogFile::print_info(), and BBLogFile::set_num_entries().

uint32_t bblog_file_header::reserved

Reserved for future use.

Definition at line 59 of file file.h.

char bblog_file_header::scenario[BBLOG_SCENARIO_SIZE]

Scenario as defined in config.

Definition at line 62 of file file.h.

uint64_t bblog_file_header::start_time_sec

Start time, timestamp seconds.

Definition at line 68 of file file.h.

uint64_t bblog_file_header::start_time_usec

Start time, timestamp microseconds.

Definition at line 69 of file file.h.

---

The documentation for this struct was generated from the following file:

• src/plugins/bblogger/file.h