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96 lines
2.0 KiB
96 lines
2.0 KiB
/* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program 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 |
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* GNU Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor Boston, MA 02110-1301, USA |
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*/ |
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#include <assert.h> |
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#include <stdbool.h> |
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#include <stddef.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "group.h" |
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#define FREE(x) free((x)), (x) = NULL; |
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static const int grow_step = 10; |
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static bool |
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group_grow(group_t *group, int size) { |
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int *p = NULL; |
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assert(group != NULL); |
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if (size <= 0) |
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return false; |
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if (size <= group->caps) |
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return false; |
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if ((p = realloc(group->ids, size * sizeof(int))) == NULL) |
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return false; |
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group->ids = p, |
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group->caps = size; |
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return true; |
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} |
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group_t * |
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group_create(int num, int size) { |
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group_t *tmp = NULL; |
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if ((tmp = calloc(1, sizeof(group_t))) == NULL) |
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return NULL; |
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tmp->num = num; |
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if (size == 0) |
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return tmp; |
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if (!group_grow(tmp, size)) |
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FREE(tmp); |
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return tmp; |
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} |
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bool |
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group_append(group_t *group, int id) { |
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assert(group != NULL); |
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for (int i = 0; i < group->size; i++) { |
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if (group->ids[i] == id) |
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return true; |
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} |
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if (group->size >= group->caps) { |
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int newcaps = group->caps ? group->caps * 2 : grow_step; |
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if (!group_grow(group, newcaps)) |
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return false; |
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} |
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group->ids[group->size] = id, |
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group->size++; |
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return true; |
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} |
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void |
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group_free(group_t *group) { |
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assert(group != NULL); |
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FREE(group->ids); |
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group->size = 0, |
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group->caps = 0; |
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}
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