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/*
* collection.c
*
* Copyright (C) 2009 Hector Martin <hector@marcansoft.com>
* Copyright (C) 2009 Nikias Bassen <nikias@gmx.li>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "collection.h"
#undef NDEBUG // we need to make sure we still get assertions because we can't handle memory allocation errors
#include <assert.h>
#define INIT_NULL(addr, count) { unsigned int i_ = 0; for (i_ = 0; i_ < count; i_++) ((void**)addr)[i_] = NULL; }
#define CAPACITY_STEP 8
void collection_init(struct collection *col)
{
col->list = malloc(sizeof(void *) * CAPACITY_STEP);
assert(col->list);
INIT_NULL(col->list, CAPACITY_STEP);
col->capacity = CAPACITY_STEP;
}
void collection_free(struct collection *col)
{
free(col->list);
col->list = NULL;
col->capacity = 0;
}
void collection_add(struct collection *col, void *element)
{
int i;
for(i=0; i<col->capacity; i++) {
if(!col->list[i]) {
col->list[i] = element;
return;
}
}
void **newlist = realloc(col->list, sizeof(void*) * (col->capacity + CAPACITY_STEP));
assert(newlist);
col->list = newlist;
INIT_NULL(&col->list[col->capacity], CAPACITY_STEP);
col->list[col->capacity] = element;
col->capacity += CAPACITY_STEP;
}
int collection_remove(struct collection *col, void *element)
{
int i;
for(i=0; i<col->capacity; i++) {
if(col->list[i] == element) {
col->list[i] = NULL;
return 0;
}
}
fprintf(stderr, "%s: WARNING: element %p not present in collection %p (cap %d)", __func__, element, col, col->capacity);
return -1;
}
int collection_count(struct collection *col)
{
int i, cnt = 0;
for(i=0; i<col->capacity; i++) {
if(col->list[i])
cnt++;
}
return cnt;
}
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