#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;
* 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.
* 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);
* 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);
+
#endif /* LTTNG_BUFFER_VIEW_H */