libgphoto2 photo camera library (libgphoto2) API 2.5.31
gphoto2-list.h File Reference

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Typedefs

typedef struct _CameraList CameraList
 A generic list.
 

Functions

int gp_list_new (CameraList **list)
 Creates a new CameraList.
 
int gp_list_ref (CameraList *list)
 Increments the reference count of the list.
 
int gp_list_unref (CameraList *list)
 Decrements the reference count of the list.
 
int gp_list_free (CameraList *list)
 
int gp_list_count (CameraList *list)
 
int gp_list_append (CameraList *list, const char *name, const char *value)
 
int gp_list_reset (CameraList *list)
 
int gp_list_sort (CameraList *list)
 
int gp_list_find_by_name (CameraList *list, int *index, const char *name)
 
int gp_list_get_name (CameraList *list, int index, const char **name)
 
int gp_list_get_value (CameraList *list, int index, const char **value)
 
int gp_list_set_name (CameraList *list, int index, const char *name)
 
int gp_list_set_value (CameraList *list, int index, const char *value)
 
int gp_list_populate (CameraList *list, const char *format, int count)
 

Detailed Description

Lists of files, folders, cameras, etc.

Author
Copyright 2001 Scott Fritzinger
Note
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Typedef Documentation

◆ CameraList

typedef struct _CameraList CameraList

A generic list.

This structure provides a list with name:value pairs that is used in various parts of libgphoto2. Its details are internal, please use the gp_list_xxx accessor functions.

Usage pattern for CameraList for users external of libgphoto2, such as libgphoto2 frontends:

CameraList *list;
gp_list_new (&list);
init_list_somehow (list);
for (i=0; i < gp_list_count(list); i++) {
char *name, *value;
gp_list_get_name (list, i, &name);
gp_list_get_name (list, i, &value);
do_something_with (name, value);
}
gp_list_free (list);
int gp_list_new(CameraList **list)
Creates a new CameraList.
Definition gphoto2-list.c:63
int gp_list_free(CameraList *list)
Definition gphoto2-list.c:120
int gp_list_count(CameraList *list)
Definition gphoto2-list.c:229
int gp_list_get_name(CameraList *list, int index, const char **name)
Definition gphoto2-list.c:280
Definition gphoto2-list.c:47

Please do NOT directly instantiate a CameraList object like this:

CameraList foo; // DO NOT DO THIS

Please do NOT directly access the structure members like this:

list->entry[i].name // DO NOT DO THIS

Function Documentation

◆ gp_list_append()

int gp_list_append ( CameraList list,
const char *  name,
const char *  value 
)

Appends name and value to the list.

Parameters
lista CameraList
namethe name of the entry to append
valuethe value of the entry to append
Returns
a gphoto2 error code

References GP_OK.

Referenced by gp_abilities_list_detect(), gp_camera_autodetect(), gp_filesystem_list_files(), gp_filesystem_list_folders(), and gp_list_populate().

◆ gp_list_count()

int gp_list_count ( CameraList list)

Counts the entries in the list.

Parameters
lista CameraList
Returns
a gphoto2 error code

Referenced by gp_camera_autodetect(), gp_camera_init(), gp_filesystem_list_files(), and gp_filesystem_list_folders().

◆ gp_list_find_by_name()

int gp_list_find_by_name ( CameraList list,
int *  index,
const char *  name 
)

Retrieves the index of an arbitrary entry with name.

Parameters
lista CameraList
indexpointer to the result index (may be NULL, only set if found)
namename of the entry
Returns
a gphoto2 error code: GP_OK if found.

No guarantees as to the speed of the search, or in what sequence the list is searched.

References GP_ERROR, and GP_OK.

◆ gp_list_free()

int gp_list_free ( CameraList list)

Frees the list. It is recommended to use gp_list_unref instead.

Parameters
listthe CameraList to be freed
Returns
a gphoto2 error code

References GP_OK.

Referenced by gp_camera_autodetect(), gp_camera_init(), gp_filesystem_number(), gp_filesystem_remove_dir(), and gp_list_unref().

◆ gp_list_get_name()

int gp_list_get_name ( CameraList list,
int  index,
const char **  name 
)

Retrieves the name of entry with index.

Parameters
lista CameraList
indexindex of the entry
name
Returns
a gphoto2 error code.

References GP_OK.

Referenced by gp_camera_autodetect(), gp_camera_init(), gp_filesystem_list_files(), and gp_filesystem_list_folders().

◆ gp_list_get_value()

int gp_list_get_value ( CameraList list,
int  index,
const char **  value 
)

Retrieves the value of entry with index.

Parameters
lista CameraList
indexindex of the entry
value
Returns
a gphoto2 error code

References GP_OK.

Referenced by gp_camera_autodetect(), and gp_camera_init().

◆ gp_list_new()

int gp_list_new ( CameraList **  list)

Creates a new CameraList.

Parameters
list
Returns
a gphoto2 error code

References GP_OK.

Referenced by gp_camera_autodetect(), gp_camera_init(), gp_filesystem_number(), and gp_filesystem_remove_dir().

◆ gp_list_populate()

int gp_list_populate ( CameraList list,
const char *  format,
int  count 
)

Adds count entries to the list.

Parameters
lista CameraList
formatthe format
countnumber of entries to be added to the list return a gphoto2 error code

Typically, this function is called by a camera driver when there is no way of retrieving the real name of a picture. In this case, when asked for a file list (see CameraFilesystemListFunc), the list is populated with dummy names generated by this function.

References gp_list_append(), gp_list_reset(), and GP_OK.

◆ gp_list_ref()

int gp_list_ref ( CameraList list)

Increments the reference count of the list.

Parameters
lista CameraList
Returns
a gphoto2 error code.

References GP_OK.

◆ gp_list_reset()

int gp_list_reset ( CameraList list)

Resets the list and removes all entries.

Parameters
lista CameraList
Returns
a gphoto2 error code

References GP_OK.

Referenced by gp_abilities_list_detect(), gp_camera_folder_list_files(), gp_camera_folder_list_folders(), gp_filesystem_list_files(), gp_filesystem_list_folders(), and gp_list_populate().

◆ gp_list_set_name()

int gp_list_set_name ( CameraList list,
int  index,
const char *  name 
)

Sets the name of an entry.

Parameters
lista CameraList
indexindex of entry
namename to be set
Returns
a gphoto2 error code

References GP_OK.

◆ gp_list_set_value()

int gp_list_set_value ( CameraList list,
int  index,
const char *  value 
)

Sets the value of an entry.

Parameters
lista CameraList
indexindex of the entry
valuethe value to be set
Returns
a gphoto2 error code

References GP_OK.

◆ gp_list_sort()

int gp_list_sort ( CameraList list)

Sorts the list entries with respect to the names.

Parameters
lista CameraList
Returns
a gphoto2 error code

References GP_OK.

Referenced by gp_camera_folder_list_files(), and gp_camera_folder_list_folders().

◆ gp_list_unref()

int gp_list_unref ( CameraList list)

Decrements the reference count of the list.

Parameters
lista CameraList
Returns
a gphoto2 error code

If there are no references left, the list will be freed.

References gp_list_free(), and GP_OK.