PROP_DICTIONARY(3)      NetBSD Library Functions Manual     PROP_DICTIONARY(3)

NAME
     prop_dictionary, prop_dictionary_create,
     prop_dictionary_create_with_capacity, prop_dictionary_copy,
     prop_dictionary_copy_mutable, prop_dictionary_count,
     prop_dictionary_ensure_capacity, prop_dictionary_iterator,
     prop_dictionary_all_keys, prop_dictionary_make_immutable,
     prop_dictionary_mutable, prop_dictionary_get, prop_dictionary_set,
     prop_dictionary_remove, prop_dictionary_get_keysym,
     prop_dictionary_set_keysym, prop_dictionary_remove_keysym,
     prop_dictionary_externalize, prop_dictionary_internalize,
     prop_dictionary_externalize_to_file,
     prop_dictionary_internalize_from_file,
     prop_dictionary_externalize_to_pref,
     prop_dictionary_internalize_from_pref, prop_dictionary_equals,
     prop_dictionary_keysym_cstring_nocopy, prop_dictionary_keysym_equals --
     dictionary property collection object

LIBRARY
     Property Container Object Library (libprop, -lprop)

SYNOPSIS
     #include <prop/proplib.h>

     prop_dictionary_t
     prop_dictionary_create(void);

     prop_dictionary_t
     prop_dictionary_create_with_capacity(unsigned int capacity);

     prop_dictionary_t
     prop_dictionary_copy(prop_dictionary_t dict);

     prop_dictionary_t
     prop_dictionary_copy_mutable(prop_dictionary_t dict);

     unsigned int
     prop_dictionary_count(prop_dictionary_t dict);

     bool
     prop_dictionary_ensure_capacity(prop_dictionary_t dict,
         unsigned int capacity);

     prop_object_iterator_t
     prop_dictionary_iterator(prop_dictionary_t dict);

     prop_array_t
     prop_dictionary_all_keys(prop_dictionary_t dict);

     void
     prop_dictionary_make_immutable(prop_dictionary_t dict);

     bool
     prop_dictionary_mutable(prop_dictionary_t dict);

     prop_object_t
     prop_dictionary_get(prop_dictionary_t dict, const char *key);

     bool
     prop_dictionary_set(prop_dictionary_t dict, const char *key,
         prop_object_t obj);

     void
     prop_dictionary_remove(prop_dictionary_t dict, const char *key);

     prop_object_t
     prop_dictionary_get_keysym(prop_dictionary_t dict,
         prop_dictionary_keysym_t keysym);

     bool
     prop_dictionary_set_keysym(prop_dictionary_t dict,
         prop_dictionary_keysym_t keysym, prop_object_t obj);

     void
     prop_dictionary_remove_keysym(prop_dictionary_t dict,
         prop_dictionary_keysym_t keysym);

     bool
     prop_dictionary_equals(prop_dictionary_t dict1, prop_dictionary_t dict2);

     const char *
     prop_dictionary_keysym_cstring_nocopy(prop_dictionary_keysym_t sym);

     bool
     prop_dictionary_keysym_equals(prop_dictionary_keysym_t keysym1,
         prop_dictionary_keysym_t keysym2);

     char *
     prop_dictionary_externalize(prop_dictionary_t dict);

     prop_dictionary_t
     prop_dictionary_internalize(const char *xml);

     bool
     prop_dictionary_externalize_to_file(prop_dictionary_t dict,
         const char *path);

     prop_dictionary_t
     prop_dictionary_internalize_from_file(const char *path);

     bool
     prop_dictionary_externalize_to_pref(prop_dictionary_t dict,
         struct plistref *pref);

     bool
     prop_dictionary_internalize_from_pref(const struct plistref *pref,
         prop_dictionary_t *dictp);

DESCRIPTION
     The prop_dictionary family of functions operate on the dictionary prop-
     erty collection object type.  A dictionary is an unordered set of objects
     stored as key-value pairs.

     prop_dictionary_create(void)
            Create an empty dictionary.  The dictionary initially has no
            capacity.  Returns NULL on failure.

     prop_dictionary_create_with_capacity(unsigned int capacity)
            Create a dictionary with the capacity to store capacity objects.
            Returns NULL on failure.

     prop_dictionary_copy(prop_dictionary_t dict)
            Copy a dictionary.  The new dictionary has an initial capacity
            equal to the number of objects stored in the dictionary being
            copied.  The new dictionary contains references to the original
            dictionary's objects, not copies of those objects (i.e. a shallow
            copy is made).  If the original dictionary is immutable, the
            resulting dictionary is also immutable.

     prop_dictionary_copy_mutable(prop_dictionary_t dict)
            Like prop_dictionary_copy(), except the resulting dictionary is
            always mutable.

     prop_dictionary_count(prop_dictionary_t dict)
            Returns the number of objects stored in the dictionary.

     prop_dictionary_ensure_capacity(prop_dictionary_t dict, unsigned int
            capacity)
            Ensure that the dictionary has a total capacity of capacity,
            including objects already stored in the dictionary.  Returns true
            if the capacity of the dictionary is greater or equal to capacity
            or if the expansion of the dictionary's capacity was successful
            and false otherwise.  If the supplied object isn't a dictionary,
            false is returned.

     prop_dictionary_iterator(prop_dictionary_t dict)
            Create an iterator for the dictionary.  The dictionary is retained
            by the iterator.  A dictionary iterator returns the key symbols
            used to look up objects stored in the dictionary; to get the
            object itself, a dictionary lookup using this key symbol must be
            performed.  Storing to or removing from the dictionary invalidates
            any active iterators for the dictionary.  Returns NULL on failure.

     prop_dictionary_all_keys(prop_dictionary_t dict)
            Return an array of all of the dictionary key symbols
            (prop_dictionary_keysym_t) in the dictionary.  This provides a way
            to iterate over the items in the dictionary while retaining the
            ability to mutate the dictionary; instead of iterating over the
            dictionary itself, iterate over the array of keys.  The caller is
            responsible for releasing the array.  Returns NULL on failure.

     prop_dictionary_make_immutable(prop_dictionary_t dict)
            Make dict immutable.

     prop_dictionary_mutable(prop_dictionary_t dict)
            Returns true if the dictionary is mutable.

     prop_dictionary_get(prop_dictionary_t dict, const char *key)
            Return the object stored in the dictionary with the key key.  If
            no object is stored with the specified key, NULL is returned.

     prop_dictionary_set(prop_dictionary_t dict, const char *key,
            prop_object_t obj)
            Store a reference to the object obj with the key key.  The object
            will be retained by the dictionary.  If the key already exists in
            the dictionary, the object associated with that key will be
            released and replaced with the new object.  Returns true if stor-
            ing the object was successful and false otherwise.

     prop_dictionary_remove(prop_dictionary_t dict, const char *key)
            Remove the reference to the object stored in the dictionary with
            the key key.  The object will be released.

     prop_dictionary_get_keysym(prop_dictionary_t dict,
            prop_dictionary_keysym_t sym)
            Like prop_dictionary_get(), but the lookup is performed using a
            key symbol returned by a dictionary iterator.  The results are
            undefined if the iterator used to obtain the key symbol is not
            associated with dict.

     prop_dictionary_set_keysym(prop_dictionary_t dict,
            prop_dictionary_keysym_t sym, prop_object_t obj)
            Like prop_dictionary_set(), but the lookup of the object to
            replace is performed using a key symbol returned by a dictionary
            iterator.  The results are undefined if the iterator used to
            obtain the key symbol is not associated with dict.

     prop_dictionary_remove_keysym(prop_dictionary_t dict,
            prop_dictionary_keysym_t sym)
            Like prop_dictionary_remove(), but the lookup of the object to
            remove is performed using a key symbol returned by a dictionary
            iterator.  The results are undefined if the iterator used to
            obtain the key symbol is not associated with dict.

     prop_dictionary_equals(prop_dictionary_t dict1, prop_dictionary_t dict2)
            Returns true if the two dictionaries are equivalent.  Note:
            Objects contained in the dictionary are compared by value, not by
            reference.

     prop_dictionary_keysym_cstring_nocopy(prop_dictionary_keysym_t keysym)
            Returns an immutable reference to the dictionary key symbol's
            string value.

     prop_dictionary_keysym_equals(prop_dictionary_keysym_t keysym1,
            prop_dictionary_keysym_t keysym2)
            Returns true if the two dictionary key symbols are equivalent.

     prop_dictionary_externalize(prop_dictionary_t dict)
            Externalizes a dictionary, returning a NUL-terminated buffer con-
            taining the XML representation of the dictionary.  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 malloc(9) using the malloc
            type M_TEMP.

     prop_dictionary_internalize(const char *xml)
            Parse the XML representation of a property list in the NUL-termi-
            nated buffer xml and return the corresponding dictionary.  Returns
            NULL if parsing fails for any reason.

     prop_dictionary_externalize_to_file(prop_dictionary_t dict, const char
            *path)
            Externalizes a dictionary 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 atomi-
            cally.  Returns false if externalizing or writing the dictionary
            fails for any reason.

     prop_dictionary_internalize_from_file(const char *path)
            Reads the XML property list contained in the file specified by
            path, internalizes it, and returns the corresponding dictionary.
            Returns NULL on failure.

     prop_dictionary_externalize_to_pref(prop_dictionary_t dict, struct
            plistref *pref)
            Externalizes a dictionary and packs it into the plistref specified
            by pref.  Returns false if externalizing the dictionary fails for
            any reason.

     prop_dictionary_internalize_from_pref(const struct plistref *pref,
            prop_dictionary_t *dictp)
            Reads the plistref specified by pref, internalizes it, and returns
            the corresponding dictionary.  Returns false if internalizing or
            writing the dictionary fails for any reason.

SEE ALSO
     prop_array(3), prop_bool(3), prop_data(3), prop_dictionary_util(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.

NetBSD 6.0                     December 5, 2009                     NetBSD 6.0

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