X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fbuffer-view.c;fp=src%2Fcommon%2Fbuffer-view.c;h=6f674f4a9828f857ada1a5e2fc3038d00ba343ba;hp=4bdb1eb7d75d48be514689200954d69c44a7809b;hb=67d8e2ef48ea2cd334bf9efd90b58b976437a3cd;hpb=03bb2358875cfca96394e78357c96baaa1e91efa

diff --git a/src/common/buffer-view.c b/src/common/buffer-view.c
index 4bdb1eb7d..6f674f4a9 100644
--- a/src/common/buffer-view.c
+++ b/src/common/buffer-view.c
@@ -67,3 +67,45 @@ 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;
+}