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This commit is contained in:
laurent
2019-12-05 04:53:56 +01:00
committed by Florian Kaltenberger
parent ee6b18d377
commit 80cd6940af
46 changed files with 187 additions and 348 deletions
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common/utils/hashtable/hashtable.c
-74
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@@ -162,34 +162,6 @@ hashtable_rc_t hashtable_is_key_exists (const hash_table_t *const hashtblP, cons
return HASH_TABLE_KEY_NOT_EXISTS;
}
//-------------------------------------------------------------------------------------------------------------------------------
hashtable_rc_t hashtable_apply_funct_on_elements (hash_table_t *const hashtblP, void functP(hash_key_t keyP, void *dataP, void *parameterP), void *parameterP)
//-------------------------------------------------------------------------------------------------------------------------------
{
hash_node_t *node = NULL;
unsigned int i = 0;
unsigned int num_elements = 0;
if (hashtblP == NULL) {
return HASH_TABLE_BAD_PARAMETER_HASHTABLE;
}
while ((num_elements < hashtblP->num_elements) && (i < hashtblP->size)) {
if (hashtblP->nodes[i] != NULL) {
node=hashtblP->nodes[i];
while(node) {
num_elements += 1;
functP(node->key, node->data, parameterP);
node=node->next;
}
}
i += 1;
}
return HASH_TABLE_OK;
}
//-------------------------------------------------------------------------------------------------------------------------------
hashtable_rc_t hashtable_dump_content (const hash_table_t *const hashtblP, char *const buffer_pP, int *const remaining_bytes_in_buffer_pP )
//-------------------------------------------------------------------------------------------------------------------------------
{
@@ -266,7 +238,6 @@ hashtable_rc_t hashtable_insert(hash_table_t *const hashtblP, const hash_key_t k
}
hashtblP->nodes[hash]=node;
hashtblP->num_elements += 1;
return HASH_TABLE_OK;
}
//-------------------------------------------------------------------------------------------------------------------------------
@@ -295,7 +266,6 @@ hashtable_rc_t hashtable_remove(hash_table_t *const hashtblP, const hash_key_t k
}
free(node);
hashtblP->num_elements -= 1;
return HASH_TABLE_OK;
}
@@ -335,47 +305,3 @@ hashtable_rc_t hashtable_get(const hash_table_t *const hashtblP, const hash_key_
*dataP = NULL;
return HASH_TABLE_KEY_NOT_EXISTS;
}
//-------------------------------------------------------------------------------------------------------------------------------
/*
* Resizing
* The number of elements in a hash table is not always known when creating the table.
* If the number of elements grows too large, it will seriously reduce the performance of most hash table operations.
* If the number of elements are reduced, the hash table will waste memory. That is why we provide a function for resizing the table.
* Resizing a hash table is not as easy as a realloc(). All hash values must be recalculated and each element must be inserted into its new position.
* We create a temporary hash_table_t object (newtbl) to be used while building the new hashes.
* This allows us to reuse hashtable_insert() and hashtable_remove(), when moving the elements to the new table.
* After that, we can just free the old table and copy the elements from newtbl to hashtbl.
*/
hashtable_rc_t hashtable_resize(hash_table_t *const hashtblP, const hash_size_t sizeP) {
hash_table_t newtbl;
hash_size_t n;
hash_node_t *node,*next;
if (hashtblP == NULL) {
return HASH_TABLE_BAD_PARAMETER_HASHTABLE;
}
newtbl.size = sizeP;
newtbl.hashfunc = hashtblP->hashfunc;
newtbl.num_elements = 0;
if(!(newtbl.nodes=calloc(sizeP, sizeof(hash_node_t *)))) return -1;
for(n=0; n<hashtblP->size; ++n) {
for(node=hashtblP->nodes[n]; node; node=next) {
next = node->next;
hashtable_insert(&newtbl, node->key, node->data);
// Lionel GAUTHIER: BAD CODE TO BE REWRITTEN
hashtable_remove(hashtblP, node->key);
}
}
free(hashtblP->nodes);
hashtblP->size=newtbl.size;
hashtblP->nodes=newtbl.nodes;
return HASH_TABLE_OK;
}