added update() function, added multiply() function to stdlib

1 files changed, 12 insertions, 2 deletions

diff --git a/src/hashtable.c b/src/hashtable.c
index 3a83861..2ec766d 100644
--- a/src/hashtable.c
+++ b/src/hashtable.c
@@ -49,18 +49,28 @@ unsigned int hashtable_add_pair(hashtable_t* hashtable, pair_t pair) {
 	unsigned int hash = get_hash(pair.key);
 	for (int i = 0; i < hashtable->capacity; i++) {
 		pair_t p = hashtable->pairs[hash % hashtable->capacity];
-		if (p.key == NULL || p.key == pair.key) {
+		if (p.key == NULL || strcmp(p.key, pair.key) == 0) {
 			hashtable->pairs[hash % hashtable->capacity] = pair;
 			return hash;
 		}
 	}
 	return 0;
 }
+unsigned int hashtable_update_pair_recurse(hashtable_t* origin, pair_t pair) {
+	pair_t p = hashtable_get_pair(origin, pair.key);
+	if (p.key != NULL) {
+		return hashtable_add_pair(origin, pair);
+	}
+	if (origin->parent != NULL) {
+		return hashtable_update_pair_recurse(origin->parent, pair);
+	}
+	return 0;
+}
 pair_t hashtable_get_pair(hashtable_t* hashtable, char* key) {
 	unsigned int hash = get_hash(key);
 	for (int i = 0; i < hashtable->capacity; i++) {
 		pair_t p = hashtable->pairs[hash % hashtable->capacity];
-		if (p.key == key) {
+		if (p.key != NULL && strcmp(p.key, key) == 0) {
 			return p;
 		}
 		else if (p.key == NULL) {