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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: vector.c,v 1.8 2004/04/07 14:36:36 ats Exp $ |
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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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|
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#include <stdlib.h> |
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|
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#include "tools.h" |
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#include "vector.h" |
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|
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void *sg_vector_resize(void *vector, vector_header *h, int count) { |
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int new_count, i; |
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|
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/* Destroy any now-unused items. |
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* |
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* Note that there's an assumption here that making the vector smaller |
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* will never fail; if it did, then we would have destroyed items here |
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* but not actually got rid of the vector pointing to them before the |
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* error return.) */ |
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if (count < h->used_count && h->destroy_fn != NULL) { |
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for (i = count; i < h->used_count; i++) { |
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h->destroy_fn((void *) (vector + i * h->item_size)); |
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} |
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} |
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|
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/* Round up the desired size to the next multiple of the block size. */ |
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new_count = ((count - 1 + h->block_size) / h->block_size) |
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* h->block_size; |
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|
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/* Resize the vector if necessary. */ |
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if (new_count != h->alloc_count) { |
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char *new_vector; |
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|
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new_vector = sg_realloc(vector, new_count * h->item_size); |
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if (new_vector == NULL && new_count != 0) { |
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/* Out of memory -- free the contents of the vector. */ |
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sg_vector_resize(vector, h, 0); |
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h->error = -1; |
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return vector; |
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} |
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|
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vector = new_vector; |
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h->alloc_count = new_count; |
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} |
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|
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/* Initialise any new items. */ |
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if (count > h->used_count && h->init_fn != NULL) { |
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for (i = h->used_count; i < count; i++) { |
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h->init_fn((void *) (vector + i * h->item_size)); |
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} |
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} |
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|
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h->used_count = count; |
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h->error = 0; |
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return vector; |
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} |
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|
