libsmack: add possibility of resizing table of labels

Signed-off-by: Jan Cybulski <j.cybulski@samsung.com>

diff --git a/libsmack/libsmack.c b/libsmack/libsmack.c
index bd68af7..79ae822 100644 (file)
--- a/libsmack/libsmack.c
+++ b/libsmack/libsmack.c
@@ -90,6 +90,7 @@ struct smack_accesses {
        int labels_cnt;
        struct smack_rule *first;
        struct smack_rule *last;
+       int labels_alloc;
        struct smack_label **labels;
        struct smack_hash_entry *label_hash;
 };
@@ -125,7 +126,8 @@ int smack_accesses_new(struct smack_accesses **accesses)
        result = calloc(1, sizeof(struct smack_accesses));
        if (result == NULL)
                return -1;
-       result->labels = malloc(DICT_HASH_SIZE * sizeof(struct smack_label *));
+       result->labels_alloc = 128;
+       result->labels = malloc(128 * sizeof(struct smack_label *));
        if (result->labels == NULL)
                goto err_out;
        result->label_hash = calloc(DICT_HASH_SIZE, sizeof(struct smack_hash_entry));
@@ -875,15 +877,23 @@ static struct smack_label *label_add(struct smack_accesses *handle, const char *
        struct smack_label *new_label;
        int len;
 
-       if (handle->labels_cnt == DICT_HASH_SIZE)
-               return NULL;
-
        len = get_label(NULL, label, &hash_value);
        if (len == -1)
                return NULL;
 
        new_label = is_label_known(handle, label, hash_value);
        if (new_label == NULL) {/*no entry added yet*/
+               if (handle->labels_cnt == handle->labels_alloc) {
+                       struct smack_label **new_labels;
+                       int size = handle->labels_alloc * 2 * sizeof(struct smack_label *);
+                       new_labels = realloc(handle->labels, size);
+                       if (new_labels != NULL) {
+                               handle->labels = new_labels;
+                               handle->labels_alloc *= 2;
+                       } else
+                               return NULL;
+               }
+
                new_label = malloc(sizeof(struct smack_label));
                if (new_label == NULL)
                        return NULL;