| 1 |
/* |
| 2 |
* i-scream libstatgrab |
| 3 |
* http://www.i-scream.org |
| 4 |
* Copyright (C) 2000-2004 i-scream |
| 5 |
* |
| 6 |
* This library is free software; you can redistribute it and/or |
| 7 |
* modify it under the terms of the GNU Lesser General Public |
| 8 |
* License as published by the Free Software Foundation; either |
| 9 |
* version 2.1 of the License, or (at your option) any later version. |
| 10 |
* |
| 11 |
* This library is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 |
* Lesser General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU Lesser General Public |
| 17 |
* License along with this library; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 19 |
* 02111-1307 USA |
| 20 |
* |
| 21 |
* $Id$ |
| 22 |
*/ |
| 23 |
|
| 24 |
#include <stdlib.h> |
| 25 |
|
| 26 |
typedef void (*vector_init_function)(void *item); |
| 27 |
typedef void (*vector_destroy_function)(void *item); |
| 28 |
|
| 29 |
typedef struct { |
| 30 |
size_t item_size; |
| 31 |
int used_count; |
| 32 |
int alloc_count; |
| 33 |
int error; |
| 34 |
int block_size; |
| 35 |
vector_init_function init_fn; |
| 36 |
vector_destroy_function destroy_fn; |
| 37 |
} vector_header; |
| 38 |
|
| 39 |
#define VECTOR_HEADER(name, item_type, block_size, init_fn, destroy_fn) \ |
| 40 |
vector_header name##_header = { \ |
| 41 |
sizeof(item_type), \ |
| 42 |
0, \ |
| 43 |
0, \ |
| 44 |
0, \ |
| 45 |
block_size, \ |
| 46 |
(vector_init_function) init_fn, \ |
| 47 |
(vector_destroy_function) destroy_fn \ |
| 48 |
} |
| 49 |
|
| 50 |
/* Internal function to resize the vector. */ |
| 51 |
void *sg_vector_resize(void *vector, vector_header *h, int count); |
| 52 |
|
| 53 |
/* Declare a vector. Specify the init/destroy functions as NULL if you don't |
| 54 |
* need them. The block size is how many items to allocate at once. */ |
| 55 |
#define VECTOR_DECLARE(name, item_type, block_size, init_fn, destroy_fn) \ |
| 56 |
item_type *name = NULL; \ |
| 57 |
VECTOR_HEADER(name, item_type, block_size, init_fn, destroy_fn) |
| 58 |
|
| 59 |
/* As VECTOR_DECLARE, but for a static vector. */ |
| 60 |
#define VECTOR_DECLARE_STATIC(name, item_type, block_size, init_fn, destroy_fn) \ |
| 61 |
static item_type *name = NULL; \ |
| 62 |
static VECTOR_HEADER(name, item_type, block_size, init_fn, destroy_fn) |
| 63 |
|
| 64 |
/* Return the current size of a vector. */ |
| 65 |
#define VECTOR_SIZE(name) \ |
| 66 |
name##_header.used_count |
| 67 |
|
| 68 |
/* Resize a vector. Returns 0 on success, -1 on out-of-memory. On |
| 69 |
* out-of-memory, the old contents of the vector will be destroyed and the old |
| 70 |
* vector will be freed. */ |
| 71 |
#define VECTOR_RESIZE(name, num_items) \ |
| 72 |
(name = sg_vector_resize((char *) name, &name##_header, num_items), \ |
| 73 |
name##_header.error) |
| 74 |
|
| 75 |
/* Free a vector, destroying its contents. */ |
| 76 |
#define VECTOR_FREE(name) \ |
| 77 |
VECTOR_RESIZE(name, 0) |
| 78 |
|
