vlc_arrays.h File Reference

This file defines functions, structures and macros for handling arrays in vlc. More...

Include dependency graph for vlc_arrays.h:

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Data Structures
struct	vlc_array_t
struct	vlc_dictionary_entry_t
struct	vlc_dictionary_t

Macros
#define	TAB_INIT(count, tab)
#define	TAB_CLEAN(count, tab)
#define	TAB_APPEND_CAST(cast, count, tab, p)
#define	TAB_APPEND(count, tab, p)    TAB_APPEND_CAST( , count, tab, p )
#define	TAB_FIND(count, tab, p, idx)
#define	TAB_ERASE(count, tab, index)
#define	TAB_REMOVE(count, tab, p)
#define	TAB_INSERT_CAST(cast, count, tab, p, index)
#define	TAB_INSERT(count, tab, p, index)    TAB_INSERT_CAST( , count, tab, p, index )
#define	BSEARCH(entries, count, elem, zetype, key, answer)
	Binary search in a sorted array.
#define	_ARRAY_ALLOC(array, newsize)
#define	_ARRAY_GROW1(array)
#define	DECL_ARRAY(type)
#define	TYPEDEF_ARRAY(type, name)   typedef DECL_ARRAY(type) name;
#define	ARRAY_INIT(array)
#define	ARRAY_RESET(array)
#define	ARRAY_APPEND(array, elem)
#define	ARRAY_INSERT(array, elem, pos)
#define	_ARRAY_SHRINK(array)
#define	ARRAY_FIND(array, p, idx)    TAB_FIND((array).i_size, (array).p_elems, p, idx)
#define	ARRAY_REMOVE(array, pos)
#define	ARRAY_VAL(array, pos)   array.p_elems[pos]
#define	ARRAY_BSEARCH(array, elem, zetype, key, answer)    BSEARCH( (array).p_elems, (array).i_size, elem, zetype, key, answer)
#define	ARRAY_FOREACH(item, array)
#define	vlc_array_item_at_index(ar, idx)

Typedefs
typedef struct vlc_array_t	vlc_array_t
typedef struct vlc_dictionary_entry_t	vlc_dictionary_entry_t
typedef struct vlc_dictionary_t	vlc_dictionary_t

Functions
static void *	realloc_down (void *ptr, size_t size)
static void *	realloc_or_free (void *p, size_t sz)
	This wrapper around realloc() will free the input pointer when realloc() returns NULL.
static void	vlc_array_init (vlc_array_t *p_array)
static void	vlc_array_clear (vlc_array_t *p_array)
static size_t	vlc_array_count (const vlc_array_t *p_array)
static ssize_t	vlc_array_index_of_item (const vlc_array_t *ar, const void *elem)
static int	vlc_array_insert (vlc_array_t *ar, void *elem, int idx)
static void	vlc_array_insert_or_abort (vlc_array_t *ar, void *elem, int idx)
static int	vlc_array_append (vlc_array_t *ar, void *elem)
static void	vlc_array_append_or_abort (vlc_array_t *ar, void *elem)
static void	vlc_array_remove (vlc_array_t *ar, size_t idx)
static uint64_t	DictHash (const char *psz_string, int hashsize)
static void	vlc_dictionary_init (vlc_dictionary_t *p_dict, int i_size)
static void	vlc_dictionary_clear (vlc_dictionary_t *p_dict, void(*pf_free)(void *p_data, void *p_obj), void *p_obj)
static int	vlc_dictionary_has_key (const vlc_dictionary_t *p_dict, const char *psz_key)
static void *	vlc_dictionary_value_for_key (const vlc_dictionary_t *p_dict, const char *psz_key)
static int	vlc_dictionary_keys_count (const vlc_dictionary_t *p_dict)
static bool	vlc_dictionary_is_empty (const vlc_dictionary_t *p_dict)
static char **	vlc_dictionary_all_keys (const vlc_dictionary_t *p_dict)
static void	vlc_dictionary_insert_impl_ (vlc_dictionary_t *p_dict, const char *psz_key, void *p_value, bool rebuild)
static void	vlc_dictionary_insert (vlc_dictionary_t *p_dict, const char *psz_key, void *p_value)
static void	vlc_dictionary_remove_value_for_key (const vlc_dictionary_t *p_dict, const char *psz_key, void(*pf_free)(void *p_data, void *p_obj), void *p_obj)

Variables
static void *const	kVLCDictionaryNotFound = NULL

Detailed Description

This file defines functions, structures and macros for handling arrays in vlc.

Macro Definition Documentation

_ARRAY_ALLOC

#define _ARRAY_ALLOC	(		array,
			newsize
	)

Value:

    {                                      \
    (array).i_alloc = newsize;                                              \
    (array).p_elems = vlc_reallocarray( (array).p_elems, (array).i_alloc,   \
                               sizeof(*(array).p_elems) );                  \
    if( !(array).p_elems ) abort();                                         \
}

_ARRAY_GROW1

#define _ARRAY_GROW1

(

array

)

Value:

    {                                               \
    if( (array).i_alloc < 10 )                                              \
        _ARRAY_ALLOC(array, 10 )                                            \
    else if( (array).i_alloc == (array).i_size )                            \
        _ARRAY_ALLOC(array, (int)((array).i_alloc * 1.5) )                    \
}

_ARRAY_SHRINK

#define _ARRAY_SHRINK

(

array

)

Value:

    {                                              \
    if( (array).i_size > 10 && (array).i_size < (int)((array).i_alloc / 1.5) ) {  \
        _ARRAY_ALLOC(array, (array).i_size + 5);                            \
    }                                                                       \
}

ARRAY_APPEND

#define ARRAY_APPEND	(		array,
			elem
	)

Value:

  do {                                                                      \
    _ARRAY_GROW1(array);                                                    \
    (array).p_elems[(array).i_size] = elem;                                 \
    (array).i_size++;                                                       \
  } while(0)

ARRAY_BSEARCH

#define ARRAY_BSEARCH	(		array,
			elem,
			zetype,
			key,
			answer
	)		BSEARCH( (array).p_elems, (array).i_size, elem, zetype, key, answer)

ARRAY_FIND

#define ARRAY_FIND	(		array,
			p,
			idx
	)		TAB_FIND((array).i_size, (array).p_elems, p, idx)

ARRAY_FOREACH

#define ARRAY_FOREACH	(		item,
			array
	)

Value:

    for (int array_index_##item = 0; \
         array_index_##item < (array).i_size && \
            ((item) = (array).p_elems[array_index_##item], 1); \
         ++array_index_##item)

ARRAY_INIT

#define ARRAY_INIT

(

array

)

Value:

  do {                                                                      \
    (array).i_alloc = 0;                                                    \
    (array).i_size = 0;                                                     \
    (array).p_elems = NULL;                                                 \
  } while(0)

ARRAY_INSERT

#define ARRAY_INSERT	(		array,
			elem,
			pos
	)

Value:

  do {                                                                      \
    _ARRAY_GROW1(array);                                                    \
    if( (array).i_size - (pos) ) {                                          \
        memmove( (array).p_elems + (pos) + 1, (array).p_elems + (pos),      \
                 ((array).i_size-(pos)) * sizeof(*(array).p_elems) );       \
    }                                                                       \
    (array).p_elems[pos] = elem;                                            \
    (array).i_size++;                                                       \
  } while(0)

ARRAY_REMOVE

#define ARRAY_REMOVE	(		array,
			pos
	)

Value:

  do {                                                                      \
    if( (array).i_size - (pos) - 1 )                                        \
    {                                                                       \
        memmove( (array).p_elems + (pos), (array).p_elems + (pos) + 1,      \
                 ( (array).i_size - (pos) - 1 ) *sizeof(*(array).p_elems) );\
    }                                                                       \
    (array).i_size--;                                                       \
    _ARRAY_SHRINK(array);                                                   \
  } while(0)

ARRAY_RESET

#define ARRAY_RESET

(

array

)

Value:

  do {                                                                      \
    (array).i_alloc = 0;                                                    \
    (array).i_size = 0;                                                     \
    free( (array).p_elems ); (array).p_elems = NULL;                        \
  } while(0)

ARRAY_VAL

#define ARRAY_VAL	(		array,
			pos
	)		array.p_elems[pos]

BSEARCH

#define BSEARCH	(		entries,
			count,
			elem,
			zetype,
			key,
			answer
	)

Value:

   do {  \
    int low = 0, high = count - 1;   \
    answer = -1; \
    while( low <= high ) {\
        int mid = ((unsigned int)low + (unsigned int)high) >> 1;\
        zetype mid_val = entries[mid] elem;\
        if( mid_val < key ) \
            low = mid + 1; \
        else if ( mid_val > key ) \
            high = mid -1;  \
        else    \
        {   \
            answer = mid;  break;   \
        }\
    } \
 } while(0)

Binary search in a sorted array.

The key must be comparable by < and >

Parameters

entries	array of entries
count	number of entries
elem	key to check within an entry (like .id, or ->i_id)
zetype	type of the key
key	value of the key
answer	index of answer within the array. -1 if not found

DECL_ARRAY

#define DECL_ARRAY

(

type

)

Value:

    struct {                                           \
    int i_alloc;                                                            \
    int i_size;                                                             \
    type *p_elems;                                                          \
}

TAB_APPEND

#define TAB_APPEND	(		count,
			tab,
			p
	)		TAB_APPEND_CAST( , count, tab, p )

TAB_APPEND_CAST

#define TAB_APPEND_CAST	(		cast,
			count,
			tab,
			p
	)

Value:

  do {                                          \
    if( (count) > 0 )                           \
        (tab) = cast realloc( tab, sizeof( *(tab) ) * ( (count) + 1 ) ); \
    else                                        \
        (tab) = cast malloc( sizeof( *(tab) ) );    \
    if( !(tab) ) abort();                       \
    (tab)[count] = (p);                         \
    (count)++;                                  \
  } while(0)

TAB_CLEAN

#define TAB_CLEAN	(		count,
			tab
	)

Value:

  do {                                          \
    free( tab );                                \
    (count)= 0;                                 \
    (tab)= NULL;                                \
  } while(0)

TAB_ERASE

#define TAB_ERASE	(		count,
			tab,
			index
	)

Value:

  do {                                      \
        if( (count) > 1 )                   \
            memmove( (tab) + (index),       \
                     (tab) + (index) + 1,   \
                     ((count) - (index) - 1 ) * sizeof( *(tab) ) );\
        (count)--;                          \
        if( (count) == 0 )                  \
        {                                   \
            free( tab );                    \
            (tab) = NULL;                   \
        }                                   \
  } while(0)

TAB_FIND

#define TAB_FIND	(		count,
			tab,
			p,
			idx
	)

Value:

  do {                                          \
    for( (idx) = 0; (idx) < (count); (idx)++ )  \
        if( (tab)[(idx)] == (p) )               \
            break;                              \
    if( (idx) >= (count) )                      \
        (idx) = -1;                             \
  } while(0)

TAB_INIT

#define TAB_INIT	(		count,
			tab
	)

Value:

  do {                                          \
    (count) = 0;                                \
    (tab) = NULL;                               \
  } while(0)

TAB_INSERT

#define TAB_INSERT	(		count,
			tab,
			p,
			index
	)		TAB_INSERT_CAST( , count, tab, p, index )

TAB_INSERT_CAST

#define TAB_INSERT_CAST	(		cast,
			count,
			tab,
			p,
			index
	)

Value:

    do { \
    if( (count) > 0 )                           \
        (tab) = cast realloc( tab, sizeof( *(tab) ) * ( (count) + 1 ) ); \
    else                                        \
        (tab) = cast malloc( sizeof( *(tab) ) );       \
    if( !(tab) ) abort();                       \
    if( (count) - (index) > 0 )                 \
        memmove( (tab) + (index) + 1,           \
                 (tab) + (index),               \
                 ((count) - (index)) * sizeof( *(tab) ) );\
    (tab)[(index)] = (p);                       \
    (count)++;                                  \
} while(0)

TAB_REMOVE

#define TAB_REMOVE	(		count,
			tab,
			p
	)

Value:

  do {                                          \
        int i_index;                            \
        TAB_FIND( count, tab, p, i_index );     \
        if( i_index >= 0 )                      \
            TAB_ERASE( count, tab, i_index );   \
  } while(0)

TYPEDEF_ARRAY

#define TYPEDEF_ARRAY	(		type,
			name
	)		typedef DECL_ARRAY(type) name;

vlc_array_item_at_index

#define vlc_array_item_at_index	(		ar,
			idx
	)

Value:

    _Generic((ar), \
        const vlc_array_t *: ((ar)->pp_elems[idx]), \
        vlc_array_t *: ((ar)->pp_elems[idx]))

Typedef Documentation

vlc_array_t

typedef struct vlc_array_t vlc_array_t

vlc_dictionary_entry_t

typedef struct vlc_dictionary_entry_t vlc_dictionary_entry_t

vlc_dictionary_t

typedef struct vlc_dictionary_t vlc_dictionary_t

Function Documentation

DictHash()

static uint64_t DictHash ( const char *  psz_string, int  hashsize  )

inlinestatic

Referenced by vlc_dictionary_has_key(), vlc_dictionary_insert_impl_(), vlc_dictionary_remove_value_for_key(), and vlc_dictionary_value_for_key().

realloc_down()

static void * realloc_down ( void *  ptr, size_t  size  )

inlinestatic

realloc_or_free()

static void * realloc_or_free ( void *  p, size_t  sz  )

inlinestatic

This wrapper around realloc() will free the input pointer when realloc() returns NULL.

The use case ptr = realloc(ptr, newsize) will cause a memory leak when ptr pointed to a heap allocation before, leaving the buffer allocated but unreferenced. vlc_realloc() is a drop-in replacement for that use case (and only that use case).

References p.

Referenced by vlc_config_create().

vlc_array_append()

static int vlc_array_append ( vlc_array_t *  ar, void *  elem  )

inlinestatic

References vlc_array_t::i_count, vlc_array_t::pp_elems, and unlikely.

Referenced by dialog_add_locked(), mrl_FragmentSplit(), vlc_array_append_or_abort(), and vlc_http_cookies_store().

vlc_array_append_or_abort()

static void vlc_array_append_or_abort ( vlc_array_t *  ar, void *  elem  )

inlinestatic

References vlc_array_append().

Referenced by ChangeFilters(), and sout_StreamChainNew().

vlc_array_clear()

static void vlc_array_clear ( vlc_array_t *  p_array )

inlinestatic

References vlc_array_t::pp_elems, and vlc_array_init().

Referenced by ChangeFilters(), mrl_info_Clean(), sout_StreamChainNew(), and vlc_http_cookies_destroy().

vlc_array_count()

static size_t vlc_array_count ( const vlc_array_t *  p_array )

inlinestatic

References vlc_array_t::i_count.

Referenced by ChangeFilters(), dialog_clear_all_locked(), fingerprint_request_Delete(), mrl_FragmentSplit(), mrl_info_Clean(), sout_StreamChainNew(), stream_extractor_AttachParsed(), vlc_http_cookies_destroy(), vlc_http_cookies_fetch(), and vlc_http_cookies_store().

vlc_array_index_of_item()

static ssize_t vlc_array_index_of_item ( const vlc_array_t *  ar, const void *  elem  )

inlinestatic

References vlc_array_t::i_count, and vlc_array_t::pp_elems.

Referenced by dialog_remove_locked().

vlc_array_init()

static void vlc_array_init ( vlc_array_t *  p_array )

inlinestatic

References vlc_array_t::i_count, and vlc_array_t::pp_elems.

Referenced by ChangeFilters(), fingerprint_request_New(), libvlc_InternalDialogInit(), mrl_info_Init(), sout_StreamChainNew(), vlc_array_clear(), and vlc_http_cookies_new().

vlc_array_insert()

static int vlc_array_insert ( vlc_array_t *  ar, void *  elem, int  idx  )

inlinestatic

References vlc_array_t::i_count, vlc_array_t::pp_elems, and unlikely.

Referenced by vlc_array_insert_or_abort().

vlc_array_insert_or_abort()

static void vlc_array_insert_or_abort ( vlc_array_t *  ar, void *  elem, int  idx  )

inlinestatic

References vlc_array_insert().

vlc_array_remove()

static void vlc_array_remove ( vlc_array_t *  ar, size_t  idx  )

inlinestatic

References vlc_array_t::i_count, likely, and vlc_array_t::pp_elems.

Referenced by dialog_remove_locked(), and vlc_http_cookies_store().

vlc_dictionary_all_keys()

static char ** vlc_dictionary_all_keys ( const vlc_dictionary_t *  p_dict )

inlinestatic

References count, vlc_dictionary_t::i_size, vlc_dictionary_t::p_entries, vlc_dictionary_entry_t::p_next, vlc_dictionary_entry_t::psz_key, strdup(), unlikely, and vlc_dictionary_keys_count().

Referenced by vlc_meta_CopyExtraNames(), and vlc_meta_Merge().

vlc_dictionary_clear()

static void vlc_dictionary_clear ( vlc_dictionary_t *  p_dict, void(*)(void *p_data, void *p_obj)  pf_free, void *  p_obj  )

inlinestatic

References vlc_dictionary_t::i_size, vlc_dictionary_t::p_entries, vlc_dictionary_entry_t::p_next, vlc_dictionary_entry_t::p_value, and vlc_dictionary_entry_t::psz_key.

Referenced by input_fetcher_Delete(), vlc_dictionary_insert_impl_(), and vlc_meta_Delete().

vlc_dictionary_has_key()

static int vlc_dictionary_has_key ( const vlc_dictionary_t *  p_dict, const char *  psz_key  )

inlinestatic

References DictHash(), vlc_dictionary_t::i_size, vlc_dictionary_t::p_entries, vlc_dictionary_entry_t::p_next, and vlc_dictionary_entry_t::psz_key.

Referenced by AddAlbumCache().

vlc_dictionary_init()

static void vlc_dictionary_init ( vlc_dictionary_t *  p_dict, int  i_size  )

inlinestatic

References vlc_dictionary_t::i_size, and vlc_dictionary_t::p_entries.

Referenced by input_fetcher_New(), vlc_dictionary_insert_impl_(), and vlc_meta_New().

vlc_dictionary_insert()

static void vlc_dictionary_insert ( vlc_dictionary_t *  p_dict, const char *  psz_key, void *  p_value  )

inlinestatic

References vlc_dictionary_insert_impl_().

Referenced by AddAlbumCache(), and vlc_meta_InsertExtra().

vlc_dictionary_insert_impl_()

static void vlc_dictionary_insert_impl_ ( vlc_dictionary_t *  p_dict, const char *  psz_key, void *  p_value, bool  rebuild  )

inlinestatic

References count, DictHash(), vlc_dictionary_t::i_size, vlc_dictionary_t::p_entries, vlc_dictionary_entry_t::p_next, vlc_dictionary_entry_t::p_value, vlc_dictionary_entry_t::psz_key, strdup(), vlc_dictionary_clear(), vlc_dictionary_init(), and vlc_dictionary_insert_impl_().

Referenced by vlc_dictionary_insert(), and vlc_dictionary_insert_impl_().

vlc_dictionary_is_empty()

static bool vlc_dictionary_is_empty ( const vlc_dictionary_t *  p_dict )

inlinestatic

References vlc_dictionary_t::i_size, and vlc_dictionary_t::p_entries.

vlc_dictionary_keys_count()

static int vlc_dictionary_keys_count ( const vlc_dictionary_t *  p_dict )

inlinestatic

References count, vlc_dictionary_t::i_size, vlc_dictionary_t::p_entries, and vlc_dictionary_entry_t::p_next.

Referenced by vlc_dictionary_all_keys(), and vlc_meta_GetExtraCount().

vlc_dictionary_remove_value_for_key()

static void vlc_dictionary_remove_value_for_key ( const vlc_dictionary_t *  p_dict, const char *  psz_key, void(*)(void *p_data, void *p_obj)  pf_free, void *  p_obj  )

inlinestatic

References DictHash(), vlc_dictionary_t::i_size, vlc_dictionary_t::p_entries, vlc_dictionary_entry_t::p_next, vlc_dictionary_entry_t::p_value, and vlc_dictionary_entry_t::psz_key.

Referenced by vlc_meta_Merge(), and vlc_meta_SetExtraWithPriority().

vlc_dictionary_value_for_key()

static void * vlc_dictionary_value_for_key ( const vlc_dictionary_t *  p_dict, const char *  psz_key  )

inlinestatic

References DictHash(), vlc_dictionary_t::i_size, kVLCDictionaryNotFound, vlc_dictionary_t::p_entries, vlc_dictionary_entry_t::p_next, vlc_dictionary_entry_t::p_value, and vlc_dictionary_entry_t::psz_key.

Referenced by ReadAlbumCache(), vlc_meta_GetExtra(), vlc_meta_Merge(), and vlc_meta_SetExtraWithPriority().

Variable Documentation

kVLCDictionaryNotFound

void* const kVLCDictionaryNotFound = NULL

static

Referenced by vlc_dictionary_value_for_key(), and vlc_meta_SetExtraWithPriority().