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/* |
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* i-scream libstatgrab |
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* http://www.i-scream.org |
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* Copyright (C) 2000-2004 i-scream |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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* 02111-1307 USA |
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* |
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* $Id$ |
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*/ |
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|
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#include <stdlib.h> |
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typedef void (*vector_init_function)(void *item); |
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size_t item_size; |
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int used_count; |
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int alloc_count; |
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int error; |
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int block_size; |
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vector_init_function init_fn; |
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vector_destroy_function destroy_fn; |
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sizeof(item_type), \ |
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0, \ |
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0, \ |
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0, \ |
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block_size, \ |
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(vector_init_function) init_fn, \ |
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(vector_destroy_function) destroy_fn \ |
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} |
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|
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/* A pointer value that won't be returned by malloc, and isn't NULL, so can be |
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* used as a sentinel by allocation routines that need to return NULL |
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* sometimes. */ |
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extern char statgrab_vector_sentinel_value; |
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static void *statgrab_vector_sentinel = &statgrab_vector_sentinel_value; |
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/* Internal function to resize the vector. */ |
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void *sg_vector_resize(void *vector, vector_header *h, int count); |
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|
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/* Internal function to resize the vector. Ideally it would take void ** as the |
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* first parameter, but ANSI strict-aliasing rules would then prevent it from |
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* doing anything with it, so we return a sentinel value as above instead if |
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* allocation fails. */ |
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void *statgrab_vector_resize(void *vector, vector_header *h, int count); |
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|
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/* Declare a vector. Specify the init/destroy functions as NULL if you don't |
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* need them. The block size is how many items to allocate at once. */ |
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#define VECTOR_DECLARE(name, item_type, block_size, init_fn, destroy_fn) \ |
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/* Resize a vector. Returns 0 on success, -1 on out-of-memory. On |
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* out-of-memory, the old contents of the vector will be destroyed and the old |
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* vector will be freed. |
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* |
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* This is ugly because it needs to check for the sentinel value. |
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*/ |
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* vector will be freed. */ |
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#define VECTOR_RESIZE(name, num_items) \ |
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(((name = statgrab_vector_resize((char *) name, &name##_header, num_items)) \ |
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== statgrab_vector_sentinel) ? -1 : 0) |
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(name = sg_vector_resize((char *) name, &name##_header, num_items), \ |
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name##_header.error) |
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/* Free a vector, destroying its contents. */ |
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#define VECTOR_FREE(name) \ |
