X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fbuffer-view.h;h=ecd764d7c019f1c5e5902b848676f78df93ef223;hb=6dca8ba7dec3b31acb7b43f5e4431676acf4e664;hp=e8c351b3f994974a847bf4936812ad073b445ef4;hpb=ab5be9fa2eb5ba9600a82cd18fd3cfcbac69169a;p=lttng-tools.git

diff --git a/src/common/buffer-view.h b/src/common/buffer-view.h
index e8c351b3f..ecd764d7c 100644
--- a/src/common/buffer-view.h
+++ b/src/common/buffer-view.h
@@ -8,9 +8,14 @@
 #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>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 struct lttng_dynamic_buffer;
 
@@ -30,10 +35,20 @@ struct lttng_buffer_view {
  * 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);
 
+/**
+ * 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
+ */
+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.
@@ -47,7 +62,6 @@ struct lttng_buffer_view lttng_buffer_view_init(
  * Note that a buffer view never assumes the ownership of the memory it
  * references.
  */
-LTTNG_HIDDEN
 struct lttng_buffer_view lttng_buffer_view_from_view(
 		const struct lttng_buffer_view *src, size_t offset,
 		ptrdiff_t len);
@@ -65,9 +79,25 @@ struct lttng_buffer_view lttng_buffer_view_from_view(
  * Note that a buffer view never assumes the ownership of the memory it
  * references.
  */
-LTTNG_HIDDEN
 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.
+ */
+bool lttng_buffer_view_contains_string(const struct lttng_buffer_view *buf,
+		const char *str,
+		size_t len_with_null_terminator);
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* LTTNG_BUFFER_VIEW_H */