X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fbuffer-view.h;h=47f09b430c5be1c3b538c86d5eae20b1546a217d;hp=878b845bc77412bb801f81207a1bd38b5a0fd13e;hb=7c1f6da21f4d46d9c834820a2b26f0634c7365a9;hpb=b35aac846ef0c3109e964f5babd59cdbabe373cc

diff --git a/src/common/buffer-view.h b/src/common/buffer-view.h
index 878b845bc..47f09b430 100644
--- 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;
 
@@ -44,6 +35,18 @@ LTTNG_HIDDEN
 struct lttng_buffer_view lttng_buffer_view_init(
 		const char *src, size_t offset, ptrdiff_t len);
 
+/**
+ * Checks if a buffer view is safe to access.
+ *
+ * After calling the buffer view creation functions, callers should verify
+ * if the resquested length (if any is explicitly provided) could be mapped
+ * to a new view.
+ *
+ * @view	Buffer view to validate
+ */
+LTTNG_HIDDEN
+bool lttng_buffer_view_is_valid(const struct lttng_buffer_view *view);
+
 /**
  * Return a buffer view referencing a subset of the memory referenced by another
  * view.
@@ -80,4 +83,18 @@ struct lttng_buffer_view lttng_buffer_view_from_dynamic_buffer(
 		const struct lttng_dynamic_buffer *src, size_t offset,
 		ptrdiff_t len);
 
+/**
+ * Verify that `buf` contains a string starting at `str` of length
+ * `len_with_null_terminator`.
+ *
+ * @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_contains_string(const struct lttng_buffer_view *buf,
+		const char *str,
+		size_t len_with_null_terminator);
+
 #endif /* LTTNG_BUFFER_VIEW_H */