+ simdb_record_used()

src/database.c

@@ -231,6 +231,25 @@ simdb_write(simdb_t *db, int start, int records, simdb_urec_t *data) {
   return records;
 }
 
+bool
+simdb_record_used(simdb_t *db, int num) {
+  simdb_urec_t *rec = NULL;
+  bool ret = false;
+
+  assert(db != NULL);
+
+  if (num > db->records)
+    return false;
+
+  if (simdb_read(db, num, 1, &rec) < 1)
+    return false;
+
+  ret = rec->used ? true : false;
+
+  FREE(rec);
+  return ret;
+}
+
 int
 simdb_record_del(simdb_t *db, int num) {
   simdb_urec_t *rec;

src/simdb.h

@@ -105,6 +105,14 @@ int simdb_search(simdb_t * const db, int num,
                  simdb_search_t  * const search,
                  simdb_match_t  ** matches);
 
+/**
+ * @brief Checks is record with given number is used
+ * @param db  Database handle
+ * @param num Record number
+ * @returns true if used, false if no record exists or not used
+ */
+bool simdb_record_used(simdb_t *db, int num);
+
 /**
  * @brief Create record from image file
  * @param path Path to source image