187 lines
8.2 KiB
C
187 lines
8.2 KiB
C
/*
|
|
* ***** BEGIN GPL LICENSE BLOCK *****
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* The Original Code is Copyright (C) 2008 Blender Foundation.
|
|
* All rights reserved.
|
|
*
|
|
* The Original Code is: all of this file.
|
|
*
|
|
* Contributor(s): Joseph Eagar.
|
|
*
|
|
* ***** END GPL LICENSE BLOCK *****
|
|
*/
|
|
|
|
#ifndef __BLI_ARRAY_H__
|
|
#define __BLI_ARRAY_H__
|
|
|
|
/** \file BLI_array.h
|
|
* \ingroup bli
|
|
* \brief A (mainly) macro array library.
|
|
*/
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* internal defines */
|
|
|
|
/* this returns the entire size of the array, including any buffering. */
|
|
#define _bli_array_totalsize_dynamic(arr) ( \
|
|
((arr) == NULL) ? \
|
|
0 : \
|
|
MEM_allocN_len(arr) / sizeof(*(arr)) \
|
|
)
|
|
|
|
#define _bli_array_totalsize_static(arr) \
|
|
(sizeof(_##arr##_static) / sizeof(*(arr)))
|
|
|
|
#define _bli_array_totalsize(arr) ( \
|
|
(size_t) \
|
|
(((void *)(arr) == (void *)_##arr##_static && (void *)(arr) != NULL) ? \
|
|
_bli_array_totalsize_static(arr) : \
|
|
_bli_array_totalsize_dynamic(arr)) \
|
|
)
|
|
|
|
/* BLI_array.c
|
|
*
|
|
* Doing the realloc in a macro isn't so simple,
|
|
* so use a function the macros can use.
|
|
*/
|
|
void _bli_array_grow_func(void **arr_p, const void *arr_static,
|
|
const int sizeof_arr_p, const int arr_count, const int num,
|
|
const char *alloc_str);
|
|
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* public defines */
|
|
|
|
/* use sizeof(*(arr)) to ensure the array exists and is an array */
|
|
#define BLI_array_declare(arr) \
|
|
int _##arr##_count = ((void)(sizeof(*(arr))), 0); \
|
|
void *_##arr##_static = NULL
|
|
|
|
/* this will use stack space, up to maxstatic array elements, before
|
|
* switching to dynamic heap allocation */
|
|
#define BLI_array_staticdeclare(arr, maxstatic) \
|
|
int _##arr##_count = 0; \
|
|
char _##arr##_static[maxstatic * sizeof(arr)]
|
|
|
|
/* this returns the logical size of the array, not including buffering. */
|
|
#define BLI_array_count(arr) _##arr##_count
|
|
|
|
/* Grow the array by a fixed number of items.
|
|
*
|
|
* Allow for a large 'num' value when the new size is more than double
|
|
* to allocate the exact sized array. */
|
|
#define BLI_array_grow_items(arr, num) (( \
|
|
(((void *)(arr) == NULL) && \
|
|
((void *)(_##arr##_static) != NULL) && \
|
|
/* don't add _##arr##_count below because it must be zero */ \
|
|
(_bli_array_totalsize_static(arr) >= _##arr##_count + num)) ? \
|
|
/* we have an empty array and a static var big enough */ \
|
|
(void)(arr = (void *)_##arr##_static) \
|
|
: \
|
|
/* use existing static array or allocate */ \
|
|
(LIKELY(_bli_array_totalsize(arr) >= _##arr##_count + num) ? \
|
|
(void)0 /* do nothing */ : \
|
|
_bli_array_grow_func((void **)&(arr), _##arr##_static, \
|
|
sizeof(*(arr)), _##arr##_count, num, \
|
|
"BLI_array." #arr), \
|
|
(void)0) /* msvc2008 needs this */ \
|
|
), \
|
|
/* increment the array count, all conditions above are accounted for. */ \
|
|
(_##arr##_count += num))
|
|
|
|
/* returns length of array */
|
|
#define BLI_array_grow_one(arr) BLI_array_grow_items(arr, 1)
|
|
|
|
|
|
/* appends an item to the array. */
|
|
#define BLI_array_append(arr, item) ( \
|
|
(void) BLI_array_grow_one(arr), \
|
|
(void) (arr[_##arr##_count - 1] = item) \
|
|
)
|
|
|
|
/* appends an item to the array and returns a pointer to the item in the array.
|
|
* item is not a pointer, but actual data value.*/
|
|
#define BLI_array_append_r(arr, item) ( \
|
|
(void) BLI_array_grow_one(arr), \
|
|
(void) (arr[_##arr##_count - 1] = item), \
|
|
(&arr[_##arr##_count - 1]) \
|
|
)
|
|
|
|
#define BLI_array_reserve(arr, num) \
|
|
BLI_array_grow_items(arr, num), (void)(_##arr##_count -= (num))
|
|
|
|
|
|
#define BLI_array_free(arr) \
|
|
if (arr && (char *)arr != _##arr##_static) { \
|
|
BLI_array_fake_user(arr); \
|
|
MEM_freeN(arr); \
|
|
} (void)0
|
|
|
|
#define BLI_array_pop(arr) ( \
|
|
(arr && _##arr##_count) ? \
|
|
arr[--_##arr##_count] : \
|
|
NULL \
|
|
)
|
|
|
|
/* resets the logical size of an array to zero, but doesn't
|
|
* free the memory. */
|
|
#define BLI_array_empty(arr) \
|
|
{ _##arr##_count = 0; } (void)0
|
|
|
|
/* set the count of the array, doesn't actually increase the allocated array
|
|
* size. don't use this unless you know what you're doing. */
|
|
#define BLI_array_length_set(arr, count) \
|
|
{ _##arr##_count = (count); }(void)0
|
|
|
|
/* only to prevent unused warnings */
|
|
#define BLI_array_fake_user(arr) \
|
|
((void)_##arr##_count, \
|
|
(void)_##arr##_static)
|
|
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* other useful defines
|
|
* (unrelated to the main array macros) */
|
|
|
|
/* not part of the 'API' but handy funcs,
|
|
* same purpose as BLI_array_staticdeclare()
|
|
* but use when the max size is known ahead of time */
|
|
#define BLI_array_fixedstack_declare(arr, maxstatic, realsize, allocstr) \
|
|
char _##arr##_static[maxstatic * sizeof(*(arr))]; \
|
|
const bool _##arr##_is_static = ((void *)_##arr##_static) != ( \
|
|
arr = ((realsize) <= maxstatic) ? \
|
|
(void *)_##arr##_static : \
|
|
MEM_mallocN(sizeof(*(arr)) * (realsize), allocstr) \
|
|
) \
|
|
|
|
#define BLI_array_fixedstack_free(arr) \
|
|
if (_##arr##_is_static) { \
|
|
MEM_freeN(arr); \
|
|
} (void)0
|
|
|
|
|
|
void _bli_array_reverse(void *arr, unsigned int arr_len, size_t arr_stride);
|
|
#define BLI_array_reverse(arr, arr_len) \
|
|
_bli_array_reverse(arr, arr_len, sizeof(*(arr)))
|
|
|
|
void _bli_array_wrap(void *arr, unsigned int arr_len, size_t arr_stride, int dir);
|
|
#define BLI_array_wrap(arr, arr_len, dir) \
|
|
_bli_array_wrap(arr, arr_len, sizeof(*(arr)), dir)
|
|
|
|
|
|
#endif /* __BLI_ARRAY_H__ */
|