NAME
prop_array
,
prop_array_create
,
prop_array_create_with_capacity
,
prop_array_copy
,
prop_array_copy_mutable
,
prop_array_capacity
,
prop_array_count
,
prop_array_ensure_capacity
,
prop_array_iterator
,
prop_array_make_immutable
,
prop_array_mutable
,
prop_array_get
,
prop_array_set
,
prop_array_add
,
prop_array_remove
,
prop_array_externalize
,
prop_array_internalize
,
prop_array_externalize_to_file
,
prop_array_internalize_from_file
,
prop_array_externalize_to_pref
,
prop_array_internalize_from_pref
,
prop_array_equals
—
array property collection
object
LIBRARY
library “libprop”
SYNOPSIS
#include
<libprop/proplib.h>
prop_array_t
prop_array_create
(void);
prop_array_t
prop_array_create_with_capacity
(unsigned
int capacity);
prop_array_t
prop_array_copy
(prop_array_t
array);
prop_array_t
prop_array_copy_mutable
(prop_array_t
array);
unsigned int
prop_array_capacity
(prop_array_t
array);
unsigned int
prop_array_count
(prop_array_t
array);
bool
prop_array_ensure_capacity
(prop_array_t
array, unsigned int
capacity);
prop_object_iterator_t
prop_array_iterator
(prop_array_t
array);
void
prop_array_make_immutable
(prop_array_t
array);
bool
prop_array_mutable
(prop_array_t
array);
prop_object_t
prop_array_get
(prop_array_t
array, unsigned int
index);
bool
prop_array_set
(prop_array_t
array, unsigned int
index, prop_object_t
obj);
bool
prop_array_add
(prop_array_t
array, prop_object_t
obj);
void
prop_array_remove
(prop_array_t
array, unsigned int
index);
char *
prop_array_externalize
(prop_array_t
array);
prop_array_t
prop_array_internalize
(const
char *xml);
bool
prop_array_externalize_to_file
(prop_array_t
array, const char
*path);
prop_array_t
prop_array_internalize_from_file
(const
char *path);
bool
prop_array_externalize_to_pref
(prop_array_t
array, struct plistref
*pref);
bool
prop_array_internalize_from_pref
(const
struct plistref *pref,
prop_array_t
*arrayp);
bool
prop_array_equals
(prop_array_t
array1, prop_array_t
array2);
DESCRIPTION
Theprop_array
family of functions operate on the array
property collection object type. An array is an ordered set; an iterated array
will return objects in the same order with which they were stored.
prop_array_create
(void)- Create an empty array. The array initially has no capacity. Returns
NULL
on failure. prop_array_create_with_capacity
(unsigned int capacity)- Create an array with the capacity to store capacity
objects. Returns
NULL
on failure. prop_array_copy
(prop_array_t array)- Copy an array. The new array has an initial capacity equal to the number
of objects stored in the array being copied. The new array contains
references to the original array's objects, not copies of those objects
(i.e. a shallow copy is made). If the original array is immutable, the
resulting array is also immutable. Returns
NULL
on failure. prop_array_copy_mutable
(prop_array_t array)- Like
prop_array_copy
(), except the resulting array is always mutable. prop_array_capacity
(prop_array_t array)- Returns the total capacity of the array, including objects already stored in the array. If the supplied object isn't an array, zero is returned.
prop_array_count
(prop_array_t array)- Returns the number of objects stored in the array. If the supplied object isn't an array, zero is returned.
prop_array_ensure_capacity
(prop_array_t array, unsigned int capacity)- Ensure that the array has a total capacity of
capacity, including objects already stored in the
array. Returns
true
if the capacity of the array is greater or equal to capacity or if expansion of the array's capacity was successful andfalse
otherwise. prop_array_iterator
(prop_array_t array)- Create an iterator for the array. The array is retained by the iterator.
An array iterator returns the object references stored in the array.
Storing to or removing from the array invalidates any active iterators for
the array. Returns
NULL
on failure. prop_array_make_immutable
(prop_array_t array)- Make array immutable.
prop_array_mutable
(prop_array_t array)- Returns
true
if the array is mutable. prop_array_get
(prop_array_t array, unsigned int index)- Return the object stored at the array index index.
Returns
NULL
on failure. prop_array_set
(prop_array_t array, unsigned int index, prop_object_t obj)- Store a reference to the object obj at the array
index index. This function is not allowed to create
holes in the array; the caller must either be setting the object just
beyond the existing count or replacing an already existing object
reference. The object will be retained by the array. If an existing object
reference is being replaced, that object will be released. Returns
true
if storing the object was successful andfalse
otherwise. prop_array_add
(prop_array_t array, prop_object_t obj)- Add a reference to the object obj to the array,
appending to the end and growing the array's capacity if necessary. The
object will be retained by the array. Returns
true
if storing the object was successful andfalse
otherwise.During expansion, array's capacity is augmented by the
EXPAND_STEP
constant, as defined in libprop/prop_array.c file, e.g.#define EXPAND_STEP 16
prop_array_remove
(prop_array_t array, unsigned int index)- Remove the reference to the object stored at array index index. The object will be released and the array compacted following the removal.
prop_array_externalize
(prop_array_t array)- Externalizes an array, returning a NUL-terminated buffer containing the
XML representation of the array. The caller is responsible for freeing the
returned buffer. If converting to the external representation fails for
any reason,
NULL
is returned.In user space, the buffer is allocated using malloc(3). In the kernel, the buffer is allocated using kmalloc(9) using the malloc type
M_TEMP
. prop_array_internalize
(const char *xml)- Parse the XML representation of a property list in the NUL-terminated
buffer xml and return the corresponding array.
Returns
NULL
if parsing fails for any reason. prop_array_externalize_to_file
(prop_array_t array, const char *path)- Externalizes an array and writes it to the file specified by
path. The file is saved with the mode
0666
as modified by the process's file creation mask (see umask(2)) and is written atomically. Returnsfalse
if externalizing or writing the array fails for any reason. prop_array_internalize_from_file
(const char *path)- Reads the XML property list contained in the file specified by
path, internalizes it, and returns the corresponding
array. Returns
NULL
on failure. prop_array_externalize_to_pref
(prop_array_t array, struct plistref *pref)- Externalizes an array and packs it into the plistref specified by
pref. Returns
false
if externalizing the array fails for any reason. prop_array_internalize_from_pref
(const struct plistref *pref, prop_array_t *arrayp)- Reads the plistref specified by pref, internalizes
it, and returns the corresponding array. Returns
false
if internalizing or writing the array fails for any reason. prop_array_equals
(prop_array_t array1, prop_array_t array2)- Returns
true
if the two arrays are equivalent. If at least one of the supplied objects isn't an array,false
is returned. Note: Objects contained in the array are compared by value, not by reference.
SEE ALSO
prop_bool(3), prop_data(3), prop_dictionary(3), prop_number(3), prop_object(3), prop_string(3), proplib(3)
HISTORY
The proplib
property container object
library first appeared in NetBSD 4.0.