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dict: Add lif_dict_find_all().

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As a dict can have multiple values for any given key we add a function to
  query all occurences of a given key and return them as a (new) list.

Signed-off-by: Maximilian Wilhelm <max@sdn.clinic>
This commit is contained in:
Maximilian Wilhelm 2020-07-28 22:41:27 +02:00
parent cb9d347c8a
commit b1dfa609f9
2 changed files with 28 additions and 0 deletions
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26
libifupdown/dict.c
View file

@ -3,6 +3,7 @@
* Purpose: wrapping linked lists to provide a naive dictionary
*
* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
* Copyright (c) 2020 Maximilian Wilhelm <max@sdn.clinic>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -65,6 +66,31 @@ lif_dict_find(struct lif_dict *dict, const char *key)
return NULL;
}
struct lif_list *
lif_dict_find_all(struct lif_dict *dict, const char *key)
{
struct lif_list *entries = calloc(1, sizeof(struct lif_list));
struct lif_node *iter;
LIF_LIST_FOREACH(iter, dict->list.head)
{
struct lif_dict_entry *entry = iter->data;
if (!strcmp(entry->key, key))
{
struct lif_node *new = calloc(1, sizeof(struct lif_node));
lif_node_insert_tail(new, entry->data, entries);
}
}
if (entries->length == 0)
{
free(entries);
return NULL;
}
return entries;
}
void
lif_dict_delete(struct lif_dict *dict, const char *key)
{

2
libifupdown/dict.h
View file

@ -3,6 +3,7 @@
* Purpose: wrapping linked lists to provide a naive dictionary
*
* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
* Copyright (c) 2020 Maximilian Wilhelm <max@sdn.clinic>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -38,6 +39,7 @@ extern void lif_dict_init(struct lif_dict *dict);
extern void lif_dict_fini(struct lif_dict *dict);
extern struct lif_dict_entry *lif_dict_add(struct lif_dict *dict, const char *key, void *data);
extern struct lif_dict_entry *lif_dict_find(struct lif_dict *dict, const char *key);
extern struct lif_list *lif_dict_find_all(struct lif_dict *dict, const char *key);
extern void lif_dict_delete(struct lif_dict *dict, const char *key);
extern void lif_dict_delete_entry(struct lif_dict *dict, struct lif_dict_entry *entry);