[db] Add methods db_mprintf() and db_snprintf() which wrap sqlite

src/db.c

@@ -353,6 +353,48 @@ db_escape_string(const char *str)
   return ret;
 }
 
+// Basically a wrapper for sqlite3_mprintf()
+char *
+db_mprintf(const char *fmt, ...)
+{
+  char *query;
+  char *ret;
+  va_list va;
+
+  va_start(va, fmt);
+  ret = sqlite3_vmprintf(fmt, va);
+  if (!ret)
+    {
+      DPRINTF(E_FATAL, L_MISC, "Out of memory for db_mprintf\n");
+      abort();
+    }
+  va_end(va);
+
+  query = strdup(ret);
+  sqlite3_free(ret);
+
+  return query;
+}
+
+int
+db_snprintf(char *s, int n, const char *fmt, ...)
+{
+  char *ret;
+  va_list va;
+
+  if (n < 2)
+    return -1;
+
+  va_start(va, fmt);
+  ret = sqlite3_vsnprintf(n, s, fmt, va);
+  va_end(va);
+
+  if (!ret || (strlen(ret) == n - 1))
+    return -1;
+
+  return 0;
+}
+
 void
 free_pi(struct pairing_info *pi, int content_only)
 {

src/db.h

@@ -424,7 +424,13 @@ struct db_queue_item
 };
 
 char *
-db_escape_string(const char *str);
+db_escape_string(const char *str); // TODO Remove this, use db_mprintf instead
+
+char *
+db_mprintf(const char *fmt, ...);
+
+int
+db_snprintf(char *s, int n, const char *fmt, ...);
 
 void
 free_pi(struct pairing_info *pi, int content_only);

src/library/filescanner_playlist.c

@@ -149,13 +149,6 @@ process_regular_file(int pl_id, char *path)
 	path[i] = '/';
     }
 
-  ret = snprintf(filter, sizeof(filter), "(f.fname = '%s')", filename_from_path(path)); // TODO make case insensitive?
-  if (ret < 0 || ret >= sizeof(filter))
-    {
-      DPRINTF(E_LOG, L_SCAN, "Playlist contains bad filename: '%s'\n", path);
-      return -1;
-    }
-
   // Fast path - only works if there are not multiple items in the lib with the
   // same filename
 /*  ret = db_pl_add_item_byfile(pl_id, filename_from_path(path));
@@ -165,6 +158,13 @@ process_regular_file(int pl_id, char *path)
   DPRINTF(E_DBG, L_SCAN, "Fast path adding '%s' to playlist did not work (ret=%d), now searching\n", path, ret);
 */
 
+  ret = db_snprintf(filter, sizeof(filter), "f.fname = '%q'", filename_from_path(path)); // TODO make case insensitive?
+  if (ret < 0)
+    {
+      DPRINTF(E_LOG, L_SCAN, "Path in playlist is too long: '%s'\n", path);
+      return -1;
+    }
+
   memset(&qp, 0, sizeof(struct query_params));
 
   qp.type = Q_BROWSE_PATH;