X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=src%2Fcommon%2Fbuffer-view.c;h=7337dbb06156bc62a118fee12ce23a8887fadbaa;hb=179ad61c39b5164f2b9f48f355fc1ad3ec73c8a4;hp=4bdb1eb7d75d48be514689200954d69c44a7809b;hpb=f9f927bc85812b09e5cb60f598d91b86db8d19c8;p=lttng-tools.git

diff --git a/src/common/buffer-view.c b/src/common/buffer-view.c
index 4bdb1eb7d..7337dbb06 100644
--- a/src/common/buffer-view.c
+++ b/src/common/buffer-view.c
@@ -18,6 +18,12 @@ struct lttng_buffer_view lttng_buffer_view_init(
 	return view;
 }
 
+LTTNG_HIDDEN
+bool lttng_buffer_view_is_valid(const struct lttng_buffer_view *view)
+{
+	return view && view->data && view->size > 0;
+}
+
 LTTNG_HIDDEN
 struct lttng_buffer_view lttng_buffer_view_from_view(
 		const struct lttng_buffer_view *src, size_t offset,
@@ -67,3 +73,45 @@ struct lttng_buffer_view lttng_buffer_view_from_dynamic_buffer(
 end:
 	return view;
 }
+
+LTTNG_HIDDEN
+bool lttng_buffer_view_contains_string(const struct lttng_buffer_view *buf,
+		const char *str,
+		size_t len_with_null_terminator)
+{
+	const char *past_buf_end;
+	size_t max_str_len_with_null_terminator;
+	size_t str_len;
+	bool ret;
+
+	past_buf_end = buf->data + buf->size;
+
+	/* Is the start of the string in the buffer view? */
+	if (str < buf->data || str >= past_buf_end) {
+		ret = false;
+		goto end;
+	}
+
+	/*
+	 * Max length the string could have to fit in the buffer, including
+	 * NULL terminator.
+	 */
+	max_str_len_with_null_terminator = past_buf_end - str;
+
+	/* Could the string even fit in the buffer? */
+	if (len_with_null_terminator > max_str_len_with_null_terminator) {
+		ret = false;
+		goto end;
+	}
+
+	str_len = lttng_strnlen(str, max_str_len_with_null_terminator);
+	if (str_len != (len_with_null_terminator - 1)) {
+		ret = false;
+		goto end;
+	}
+
+	ret = true;
+
+end:
+	return ret;
+}