SoW-2019-0002: Dynamic Snapshot

[lttng-tools.git] / src / common / buffer-view.h

diff --git a/src/common/buffer-view.h b/src/common/buffer-view.h
index 878b845bc77412bb801f81207a1bd38b5a0fd13e..4486558aa9fe497ffb884511d41540b065d5af40 100644 (file)
--- a/src/common/buffer-view.h
+++ b/src/common/buffer-view.h
@@ -1,26 +1,17 @@
 /*
- * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License, version 2.1 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: LGPL-2.1-only
  *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef LTTNG_BUFFER_VIEW_H
 #define LTTNG_BUFFER_VIEW_H
 
+#include <common/macros.h>
+#include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
-#include <common/macros.h>
 
 struct lttng_dynamic_buffer;
 
@@ -80,4 +71,22 @@ struct lttng_buffer_view lttng_buffer_view_from_dynamic_buffer(
                const struct lttng_dynamic_buffer *src, size_t offset,
                ptrdiff_t len);
 
+/**
+ * Validate that string starting at `str` of length `len_with_null_terminator`
+ * (including the NULL terminator) fits within the buffer view, and validate
+ * that it is indeed of that length.
+ *
+ * Return true if the validation passes, false otherwise.
+ *
+ * @buf                                The buffer view
+ * @str                                The start of the string
+ * @len_with_null_terminator   Expected length of the string, including the
+ *                             NULL terminator.
+ *
+ */
+LTTNG_HIDDEN
+bool lttng_buffer_view_validate_string(const struct lttng_buffer_view *buf,
+               const char *str,
+               size_t len_with_null_terminator);
+
 #endif /* LTTNG_BUFFER_VIEW_H */