Refactor searchUUIDByName: update parameter type for UUIDs found, improve memory allocation handling, and enhance error checking

TestList.csv

@@ -28,4 +28,5 @@
 44,Alena,Matouskova,3037,1,0,1
 45,Josef,Suchy,3038,1,0,1
 46,Marketa,Rezacova,3039,1,0,1
-47,Libor,Hanak,3040,1,0,1
+47,Libor,Hanak,3040,1,0,1
+48,Libor,Hanak,3040,1,0,1

include/users.h

@@ -59,7 +59,7 @@ uint16_t generateUUID(list_t *_list);
  * @param _surname Pointer to a string containing the user's surname.
  * @return Pointer to the UUID of the user if found, or 0 if no match is found.
  */
-uint16_t searchUUIDByName(list_t *_list, char *_name, char *_surname, uint16_t * _uuids_found);
+uint16_t searchUUIDByName(list_t *_list, char *_name, char *_surname, uint16_t **_uuids_found);
 
 /**
  * @brief Searches for a person in a linked list by their UUID.

src/tui.c

@@ -404,7 +404,7 @@ void personSearch(list_t *person_list, int terminal_x, int terminal_y)
             }
             else if (highlight == 2)
             {
-               uint16_t count = searchUUIDByName(person_list, name, surname, uuids_found);
+               uint16_t count = searchUUIDByName(person_list, name, surname, &uuids_found);
                list_t found_pesons;
                found_pesons.head = NULL;
                node_t **last_ptr = &found_pesons.head;

src/users.c

@@ -56,14 +56,14 @@ node_t *searchPersonByUUID(
     return NULL;
 }
 
-uint16_t searchUUIDByName(
-    list_t *_list,
-    char *_name,
-    char *_surname,
-    uint16_t **_uuids_found)
+uint16_t searchUUIDByName(list_t *_list, char *_name, char *_surname, uint16_t **_uuids_found)
 {
-    int sum = 0;
+    uint16_t sum = 0;
     uint16_t *uuids = malloc(sizeof(uint16_t));
+    if (uuids == NULL) {
+        *_uuids_found = NULL;
+        return 0;
+    }
 
     pthread_mutex_lock(&_list->lock);
     node_t *current = _list->head;
@@ -75,14 +75,15 @@ uint16_t searchUUIDByName(
             if (strcmp(_name, current->user.name) == 0 && strcmp(_surname, current->user.surname) == 0)
             {
                 sum++;
-                uint16_t *uuids = realloc(uuids, sum * sizeof(uint16_t));
-                if (uuids == NULL)
+                uint16_t *temp = realloc(uuids, sum * sizeof(uint16_t));
+                if (temp == NULL)
                 {
                     pthread_mutex_unlock(&_list->lock);
                     free(uuids);
                     puts("Fatal error: free memory is not sufficient for this operation");
                     exit(EXIT_FAILURE);
                 }
+                uuids = temp;
                 uuids[sum - 1] = current->user.uuid;
             }
         }