Database functions

Create, destroy and search database for objects. More...

Classes
struct	lfDatabase
	A lens database object. More...

Enumerations
enum	{ LF_SEARCH_LOOSE = 1, LF_SEARCH_SORT_AND_UNIQUIFY = 2 }
	Flags controlling the behavior of database searches. More...

Functions
lfDatabase *	lf_db_new (void)
	Create a new empty database object. More...
void	lf_db_destroy (lfDatabase *db)
	Destroy the database object. More...
lfError	lf_db_load (lfDatabase *db)
lfError	lf_db_load_file (lfDatabase *db, const char *filename)
lfError	lf_db_load_data (lfDatabase *db, const char *errcontext, const char *data, size_t data_size)
lfError	lf_db_save_all (const lfDatabase *db, const char *filename)
lfError	lf_db_save_file (const lfDatabase *db, const char *filename, const lfMount *const *mounts, const lfCamera *const *cameras, const lfLens *const *lenses)
char *	lf_db_save (const lfMount *const *mounts, const lfCamera *const *cameras, const lfLens *const *lenses)
const lfCamera **	lf_db_find_cameras (const lfDatabase *db, const char *maker, const char *model)
const lfCamera **	lf_db_find_cameras_ext (const lfDatabase *db, const char *maker, const char *model, int sflags)
const lfCamera *const *	lf_db_get_cameras (const lfDatabase *db)
const lfLens **	lf_db_find_lenses_hd (const lfDatabase *db, const lfCamera *camera, const char *maker, const char *lens, int sflags)
const lfLens **	lf_db_find_lenses (const lfDatabase *db, const lfLens *lens, int sflags)
const lfLens *const *	lf_db_get_lenses (const lfDatabase *db)
const lfMount *	lf_db_find_mount (const lfDatabase *db, const char *mount)
const char *	lf_db_mount_name (const lfDatabase *db, const char *mount)
const lfMount *const *	lf_db_get_mounts (const lfDatabase *db)

Detailed Description

Create, destroy and search database for objects.

Enumeration Type Documentation

anonymous enum

Flags controlling the behavior of database searches.

Enumerator
LF_SEARCH_LOOSE	This flag selects a looser search algorithm resulting in more results (still sorted by score). If it is not present, all results where at least one of the input words is missing will be discarded.
LF_SEARCH_SORT_AND_UNIQUIFY	This flag makes Lensfun to sort the results by focal length, and remove all double lens names. If a lens has entries for different crop factors/aspect ratios, the only best match is included into the result. This is meant to be used to create a list presented to the user to pick a lens. Or, to lookup a lens for which you know maker and model exactly, and to check whether the result list really contains only one element.

Function Documentation

void lf_db_destroy

(

lfDatabase *

db

)

Destroy the database object.

This is the only way to correctly destroy the database object.

Parameters

db	The database to destroy.

See also

lfDatabase::~lfDatabase

Examples:

example.c.

const lfCamera** lf_db_find_cameras	(	const lfDatabase *	db,
		const char *	maker,
		const char *	model
	)

See also

lfDatabase::FindCameras

const lfCamera** lf_db_find_cameras_ext	(	const lfDatabase *	db,
		const char *	maker,
		const char *	model,
		int	sflags
	)

See also

lfDatabase::FindCamerasExt

const lfLens** lf_db_find_lenses	(	const lfDatabase *	db,
		const lfLens *	lens,
		int	sflags
	)

See also

lfDatabase::FindLenses(const lfCamera *, const lfLens *)

const lfLens** lf_db_find_lenses_hd	(	const lfDatabase *	db,
		const lfCamera *	camera,
		const char *	maker,
		const char *	lens,
		int	sflags
	)

See also

lfDatabase::FindLenses(const lfCamera *, const char *, const char *)

const lfMount* lf_db_find_mount	(	const lfDatabase *	db,
		const char *	mount
	)

See also

lfDatabase::FindMount

const lfCamera* const* lf_db_get_cameras

(

const lfDatabase *

db

)

See also

lfDatabase::GetCameras

Examples:

example.c.

const lfLens* const* lf_db_get_lenses

(

const lfDatabase *

db

)

See also

lfDatabase::GetLenses

Examples:

example.c.

const lfMount* const* lf_db_get_mounts

(

const lfDatabase *

db

)

See also

lfDatabase::GetMounts

Examples:

example.c.

lfError lf_db_load

(

lfDatabase *

db

)

See also

lfDatabase::Load()

Examples:

example.c.

lfError lf_db_load_data	(	lfDatabase *	db,
		const char *	errcontext,
		const char *	data,
		size_t	data_size
	)

See also

lfDatabase::Load(const char *, const char *, size_t)

lfError lf_db_load_file	(	lfDatabase *	db,
		const char *	filename
	)

See also

lfDatabase::Load(const char *)

const char* lf_db_mount_name	(	const lfDatabase *	db,
		const char *	mount
	)

See also

lfDatabase::MountName

Examples:

example.c, and tfun.cpp.

lfDatabase* lf_db_new

(

void

)

Create a new empty database object.

Usually the application will want to do this at startup, after which it would be a good idea to call lf_db_load().

Returns

A new empty database object.

See also

lfDatabase::lfDatabase

Examples:

example.c, and tfun.cpp.

char* lf_db_save	(	const lfMount *const *	mounts,
		const lfCamera *const *	cameras,
		const lfLens *const *	lenses
	)

See also

lfDatabase::Save(const lfMount *const *, const lfCamera *const *, const lfLens *const *)

lfError lf_db_save_all	(	const lfDatabase *	db,
		const char *	filename
	)

See also

lfDatabase::Save(const char *)

lfError lf_db_save_file	(	const lfDatabase *	db,
		const char *	filename,
		const lfMount *const *	mounts,
		const lfCamera *const *	cameras,
		const lfLens *const *	lenses
	)

See also

lfDatabase::Save(const char *, const lfMount *const *, const lfCamera *const *, const lfLens *const *)

Examples:

example.c.