Array

An array object. More...

Files
file	array.h
	pipewire/array.h

Data Structures
struct	pw_array

Macros
#define	PW_ARRAY_INIT(extend)   ((struct pw_array) { NULL, 0, 0, (extend) })
	Initialize an array.
#define	pw_array_get_len_s(a, s)   ((a)->size / (s))
	Return the length of an array.
#define	pw_array_get_unchecked_s(a, idx, s, t)   SPA_PTROFF((a)->data,(idx)*(s),t)
#define	pw_array_check_index_s(a, idx, s)   ((idx) < pw_array_get_len_s(a,s))
#define	pw_array_get_len(a, t)   pw_array_get_len_s(a,sizeof(t))
	Get the number of items of type t in array.
#define	pw_array_get_unchecked(a, idx, t)   pw_array_get_unchecked_s(a,idx,sizeof(t),t)
	Get the item with index idx and type t from array.
#define	pw_array_check_index(a, idx, t)   pw_array_check_index_s(a,idx,sizeof(t))
	Check if an item with index idx and type t exist in array.
#define	pw_array_first(a)   ((a)->data)
#define	pw_array_end(a)   SPA_PTROFF((a)->data, (a)->size, void)
#define	pw_array_check(a, p)   (SPA_PTROFF(p,sizeof(*(p)),void) <= pw_array_end(a))
#define	pw_array_for_each(pos, array)
#define	pw_array_consume(pos, array)
#define	pw_array_remove(a, p)

Functions
static void	pw_array_init (struct pw_array *arr, size_t extend)
	Initialize the array with given extend.
static void	pw_array_clear (struct pw_array *arr)
	Clear the array.
static void	pw_array_init_static (struct pw_array *arr, void *data, size_t size)
	Initialize a static array.
static void	pw_array_reset (struct pw_array *arr)
	Reset the array.
static int	pw_array_ensure_size (struct pw_array *arr, size_t size)
	Make sure size bytes can be added to the array.
static void *	pw_array_add (struct pw_array *arr, size_t size)
	Add ref size bytes to arr.
static int	pw_array_add_ptr (struct pw_array *arr, void *ptr)
	Add a pointer to array.

Detailed Description

An array object.

The array is a dynamically resizable data structure that can hold items of the same size.

Macro Definition Documentation

PW_ARRAY_INIT

#define PW_ARRAY_INIT

(

extend

)

((struct pw_array) { NULL, 0, 0, (extend) })

Initialize an array.

The new array is empty.

pw_array_get_len_s

#define pw_array_get_len_s	(		a,
			s
	)		((a)->size / (s))

Return the length of an array.

pw_array_get_unchecked_s

#define pw_array_get_unchecked_s	(		a,
			idx,
			s,
			t
	)		SPA_PTROFF((a)->data,(idx)*(s),t)

pw_array_check_index_s

#define pw_array_check_index_s	(		a,
			idx,
			s
	)		((idx) < pw_array_get_len_s(a,s))

pw_array_get_len

#define pw_array_get_len	(		a,
			t
	)		pw_array_get_len_s(a,sizeof(t))

Get the number of items of type t in array.

pw_array_get_unchecked

#define pw_array_get_unchecked	(		a,
			idx,
			t
	)		pw_array_get_unchecked_s(a,idx,sizeof(t),t)

Get the item with index idx and type t from array.

No bounds check is done.

pw_array_check_index

#define pw_array_check_index	(		a,
			idx,
			t
	)		pw_array_check_index_s(a,idx,sizeof(t))

Check if an item with index idx and type t exist in array.

pw_array_first

#define pw_array_first

(

a

)

((a)->data)

pw_array_end

#define pw_array_end

(

a

)

SPA_PTROFF((a)->data, (a)->size, void)

pw_array_check

#define pw_array_check	(		a,
			p
	)		(SPA_PTROFF(p,sizeof(*(p)),void) <= pw_array_end(a))

pw_array_for_each

#define pw_array_for_each	(		pos,
			array
	)

pw_array_consume

#define pw_array_consume	(		pos,
			array
	)

pw_array_remove

#define pw_array_remove	(		a,
			p
	)

Function Documentation

pw_array_init()

static void pw_array_init ( struct pw_array *  arr, size_t  extend  )

inlinestatic

Initialize the array with given extend.

Extend needs to be > 0 or else the array will not be able to expand.

pw_array_clear()

static void pw_array_clear ( struct pw_array *  arr )

inlinestatic

Clear the array.

This should be called when pw_array_init() was called.

pw_array_init_static()

static void pw_array_init_static ( struct pw_array *  arr, void *  data, size_t  size  )

inlinestatic

Initialize a static array.

pw_array_reset()

static void pw_array_reset ( struct pw_array *  arr )

inlinestatic

Reset the array.

pw_array_ensure_size()

static int pw_array_ensure_size ( struct pw_array *  arr, size_t  size  )

inlinestatic

Make sure size bytes can be added to the array.

pw_array_add()

static void * pw_array_add ( struct pw_array *  arr, size_t  size  )

inlinestatic

Add ref size bytes to arr.

A pointer to memory that can hold at least size bytes is returned or NULL when an error occured and errno will be set.

pw_array_add_ptr()

static int pw_array_add_ptr ( struct pw_array *  arr, void *  ptr  )

inlinestatic

Add a pointer to array.

Returns 0 on success and a negative errno style error on failure.