TpIntSet

## TpIntSet TpIntSet — a set of unsigned integers |

## Synopsis

    #include <telepathy-glib/intset.h>

                        TpIntSet;
    void                (*TpIntFunc)                        (guint i,
                                                             gpointer userdata);
    TpIntSet*           tp_intset_sized_new                 (guint size);
    TpIntSet*           tp_intset_new                       (void);
    void                tp_intset_destroy                   (TpIntSet *set);
    void                tp_intset_clear                     (TpIntSet *set);
    void                tp_intset_add                       (TpIntSet *set,
                                                             guint element);
    gboolean            tp_intset_remove                    (TpIntSet *set,
                                                             guint element);
    gboolean            tp_intset_is_member                 (const TpIntSet *set,
                                                             guint element);
    void                tp_intset_foreach                   (const TpIntSet *set,
                                                             TpIntFunc func,
                                                             gpointer userdata);
    GArray*             tp_intset_to_array                  (TpIntSet *set);
    TpIntSet*           tp_intset_from_array                (GArray *array);
    guint               tp_intset_size                      (const TpIntSet *set);
    gboolean            tp_intset_is_equal                  (const TpIntSet *left,
                                                             const TpIntSet *right);
    TpIntSet*           tp_intset_copy                      (const TpIntSet *orig);
    TpIntSet*           tp_intset_intersection              (const TpIntSet *left,
                                                             const TpIntSet *right);
    TpIntSet*           tp_intset_union                     (const TpIntSet *left,
                                                             const TpIntSet *right);
    TpIntSet*           tp_intset_difference                (const TpIntSet *left,
                                                             const TpIntSet *right);
    TpIntSet*           tp_intset_symmetric_difference      (const TpIntSet *left,
                                                             const TpIntSet *right);
    gchar*              tp_intset_dump                      (const TpIntSet *set);
    #define             TP_INTSET_ITER_INIT                 (set)
                        TpIntSetIter;
    gboolean            tp_intset_iter_next                 (TpIntSetIter *iter);

## Description

A TpIntSet is a set of unsigned integers, implemented as a dynamically-allocated bitfield.

## Details

### TpIntSet

    typedef struct _TpIntSet TpIntSet;

Opaque type representing a set of unsigned integers.

### TpIntFunc ()

    void                (*TpIntFunc)                        (guint i,
                                                             gpointer userdata);

A callback function acting on unsigned integers.

`i` : | The relevant integer
`userdata` : | Opaque user data

### tp_intset_sized_new ()

    TpIntSet*           tp_intset_sized_new                 (guint size);

Allocate an integer set just large enough to store the given number of bits, rounded up as necessary.

The set will still expand automatically if you store larger integers; this is just an optimization to avoid wasting memory (if the set is too large) or time (if the set is too small and needs reallocation).

`size` : | 1 more than the largest integer you expect to store
Returns : | a new, empty integer set to be destroyed with `tp_intset_destroy()`

### tp_intset_new ()

    TpIntSet*           tp_intset_new                       (void);

Allocate a new integer set with a default memory allocation.

Returns : | a new, empty integer set to be destroyed with `tp_intset_destroy()`

### tp_intset_destroy ()

    void                tp_intset_destroy                   (TpIntSet *set);

Free all memory used by the set.

`set` : | set

### tp_intset_clear ()

    void                tp_intset_clear                     (TpIntSet *set);

Unset every integer in the set.

`set` : | set

### tp_intset_add ()

    void                tp_intset_add                       (TpIntSet *set,
                                                             guint element);

Add an integer into a TpIntSet.

`set` : | set
`element` : | integer to add

### tp_intset_remove ()

    gboolean            tp_intset_remove                    (TpIntSet *set,
                                                             guint element);

Remove an integer from a TpIntSet

`set` : | set
`element` : | integer to add
Returns : | `TRUE` if `element` was previously in `set`

### tp_intset_is_member ()

    gboolean            tp_intset_is_member                 (const TpIntSet *set,
                                                             guint element);

Tests if `element` is a member of `set`

`set` : | set
`element` : | integer to test
Returns : | `TRUE` if `element` is in `set`

### tp_intset_foreach ()

    void                tp_intset_foreach                   (const TpIntSet *set,
                                                             TpIntFunc func,
                                                             gpointer userdata);

Call `func`(element, `userdata`) for each element of `set`.

`set` : | set
`func` : | `TpIntFunc` to use to iterate the set
`userdata` : | user data to pass to each call of `func`

### tp_intset_to_array ()

    GArray*             tp_intset_to_array                  (TpIntSet *set);

`set` : | set to convert
Returns : | a GArray of guint (which must be freed by the caller) containing the same integers as `set`.

### tp_intset_from_array ()

    TpIntSet*           tp_intset_from_array                (GArray *array);

`array` : | An array of guint
Returns : | A set containing the same integers as `array`.

### tp_intset_size ()

    guint               tp_intset_size                      (const TpIntSet *set);

`set` : | A set of integers
Returns : | The number of integers in `set`

### tp_intset_is_equal ()

    gboolean            tp_intset_is_equal                  (const TpIntSet *left,
                                                             const TpIntSet *right);

`left` : | A set of integers
`right` : | A set of integers
Returns : | `TRUE` if `left` and `right` contain the same bits

### tp_intset_copy ()

    TpIntSet*           tp_intset_copy                      (const TpIntSet *orig);

`orig` : | A set of integers
Returns : | A set containing the same integers as `orig`, to be freed with `tp_intset_destroy()` by the caller

### tp_intset_intersection ()

    TpIntSet*           tp_intset_intersection              (const TpIntSet *left,
                                                             const TpIntSet *right);

`left` : | The left operand
`right` : | The right operand
Returns : | The set of those integers which are in both `left` and `right` (analogous to the bitwise operation left & right), to be freed with `tp_intset_destroy()` by the caller

### tp_intset_union ()

    TpIntSet*           tp_intset_union                     (const TpIntSet *left,
                                                             const TpIntSet *right);

`left` : | The left operand
`right` : | The right operand
Returns : | The set of those integers which are in either `left` or `right` (analogous to the bitwise operation left | right), to be freed with `tp_intset_destroy()` by the caller

### tp_intset_difference ()

    TpIntSet*           tp_intset_difference                (const TpIntSet *left,
                                                             const TpIntSet *right);

`left` : | The left operand
`right` : | The right operand
Returns : | The set of those integers which are in `left` and not in `right` (analogous to the bitwise operation left & (~right)), to be freed with `tp_intset_destroy()` by the caller

### tp_intset_symmetric_difference ()

    TpIntSet*           tp_intset_symmetric_difference      (const TpIntSet *left,
                                                             const TpIntSet *right);

`left` : | The left operand
`right` : | The right operand
Returns : | The set of those integers which are in either `left` or `right` but not both (analogous to the bitwise operation left ^ right), to be freed with `tp_intset_destroy()` by the caller

### tp_intset_dump ()

    gchar*              tp_intset_dump                      (const TpIntSet *set);

`set` : | An integer set
Returns : | a string which the caller must free with g_free, listing the numbers in `set` in a human-readable format

### TP_INTSET_ITER_INIT()

    #define TP_INTSET_ITER_INIT(set) { (set), (guint)(-1) }

A suitable static initializer for a TpIntSetIter, to be used as follows:

    void
    do_something (const TpIntSet *intset)
    {
      TpIntSetIter iter = TP_INTSET_ITER_INIT (intset);
      /* ... do something with iter ... */
    }

`set` : | A set of integers

### TpIntSetIter

    typedef struct {
        const TpIntSet *set;
        guint element;
    } TpIntSetIter;

A structure representing iteration over a set of integers. Must be initialized with either `TP_INTSET_ITER_INIT()` or `tp_intset_iter_init()`.

const TpIntSet *`set`; | The set iterated over.
guint `element`; | Must be (guint)(-1) before iteration starts. Set to the next element in the set by `tp_intset_iter_next()`; undefined after `tp_intset_iter_next()` returns `FALSE`.

### tp_intset_iter_next ()

    gboolean            tp_intset_iter_next                 (TpIntSetIter *iter);

If there are integers in (`iter->set`) higher than (`iter->element`), set (iter->element) to the next one and return `TRUE`. Otherwise return `FALSE`.

Usage:

    TpIntSetIter iter = TP_INTSET_INIT (intset);
    while (tp_intset_iter_next (&iter))
    {
      printf ("%u is in the intset\n", iter.element);
    }

`iter` : | An iterator originally initialized with TP_INTSET_INIT(set)
Returns : | `TRUE` if (`iter->element`) has been advanced

## See Also

TpHandleSet