X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fbuffer-view.h;h=4486558aa9fe497ffb884511d41540b065d5af40;hp=d2b18f663a0d8596889d2346aba33df11dc2d024;hb=refs%2Fheads%2Fsow-2019-0002-rev1;hpb=ff28f8657b7eafa590f914e85dcd30935244cc97

diff --git a/src/common/buffer-view.h b/src/common/buffer-view.h
index d2b18f663..4486558aa 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;
 
@@ -29,6 +20,21 @@ struct lttng_buffer_view {
 	size_t size;
 };
 
+/**
+ * Return a buffer view referencing a subset of the memory referenced by a raw
+ * pointer.
+ *
+ * @src		Source buffer to reference
+ * @offset	Offset to apply to the source memory buffer
+ * @len		Length of the memory contents to reference.
+ *
+ * Note that a buffer view never assumes the ownership of the memory it
+ * references.
+ */
+LTTNG_HIDDEN
+struct lttng_buffer_view lttng_buffer_view_init(
+		const char *src, size_t offset, ptrdiff_t len);
+
 /**
  * Return a buffer view referencing a subset of the memory referenced by another
  * view.
@@ -65,4 +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 */