146 lines
3 KiB
C
146 lines
3 KiB
C
/*
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* libifupdown/dict.c
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* Purpose: wrapping linked lists to provide a naive dictionary
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*
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* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
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* Copyright (c) 2020 Maximilian Wilhelm <max@sdn.clinic>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libifupdown/dict.h"
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void
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lif_dict_init(struct lif_dict *dict)
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{
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memset(dict, 0, sizeof *dict);
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}
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void
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lif_dict_fini(struct lif_dict *dict)
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{
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struct lif_node *iter, *iter_next;
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LIF_DICT_FOREACH_SAFE(iter, iter_next, dict)
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{
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struct lif_dict_entry *entry = iter->data;
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lif_dict_delete_entry(dict, entry);
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}
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}
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struct lif_dict_entry *
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lif_dict_add(struct lif_dict *dict, const char *key, void *data)
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{
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struct lif_dict_entry *entry = calloc(1, sizeof *entry);
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entry->key = strdup(key);
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entry->data = data;
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lif_node_insert_tail(&entry->node, entry, &dict->list);
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return entry;
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}
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struct lif_dict_entry *
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lif_dict_add_once(struct lif_dict *dict, const char *key, void *data,
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int (*compar)(const void *, const void *))
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{
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struct lif_list *existing = lif_dict_find_all(dict, key);
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if (existing != NULL)
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{
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bool found = false;
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struct lif_node *iter;
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LIF_LIST_FOREACH(iter, existing->head)
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{
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if (!compar(data, iter->data))
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{
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found = true;
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break;
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}
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}
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lif_list_free_nodes (&existing);
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if (found)
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return NULL;
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}
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struct lif_dict_entry *entry = calloc(1, sizeof *entry);
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entry->key = strdup(key);
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entry->data = data;
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lif_node_insert_tail(&entry->node, entry, &dict->list);
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return entry;
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}
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struct lif_dict_entry *
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lif_dict_find(struct lif_dict *dict, const char *key)
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{
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struct lif_node *iter;
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LIF_DICT_FOREACH(iter, dict)
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{
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struct lif_dict_entry *entry = iter->data;
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if (!strcmp(entry->key, key))
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return entry;
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}
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return NULL;
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}
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struct lif_list *
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lif_dict_find_all(struct lif_dict *dict, const char *key)
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{
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struct lif_list *entries = calloc(1, sizeof(struct lif_list));
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struct lif_node *iter;
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LIF_LIST_FOREACH(iter, dict->list.head)
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{
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struct lif_dict_entry *entry = iter->data;
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if (!strcmp(entry->key, key))
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{
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struct lif_node *new = calloc(1, sizeof(struct lif_node));
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lif_node_insert_tail(new, entry->data, entries);
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}
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}
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if (entries->length == 0)
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{
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free(entries);
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return NULL;
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}
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return entries;
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}
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void
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lif_dict_delete(struct lif_dict *dict, const char *key)
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{
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struct lif_dict_entry *entry = lif_dict_find(dict, key);
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if (entry == NULL)
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return;
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lif_dict_delete_entry(dict, entry);
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}
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void
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lif_dict_delete_entry(struct lif_dict *dict, struct lif_dict_entry *entry)
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{
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lif_node_delete(&entry->node, &dict->list);
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free(entry->key);
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free(entry);
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}
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