From 40037ecb34b4e5ae3ac64cc3628206dddd0275b2 Mon Sep 17 00:00:00 2001
From: yvt <i@yvt.jp>
Date: Sun, 19 May 2019 13:12:16 +0900
Subject: [PATCH] Add `RandomAccessAdaptor::Prefetch`

---
 Sources/Core/RandomAccessAdaptor.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Sources/Core/RandomAccessAdaptor.h b/Sources/Core/RandomAccessAdaptor.h
index 9c18537f..988073ec 100644
--- a/Sources/Core/RandomAccessAdaptor.h
+++ b/Sources/Core/RandomAccessAdaptor.h
@@ -84,6 +84,15 @@ namespace spades {
 			}
 		}
 
+		/**
+		 * Read the inner stream ahead to make the internal buffer at least `length` bytes long.
+		 */
+		void Prefetch(std::size_t length) {
+			SPADES_MARK_FUNCTION();
+
+			ExpandTo(length);
+		}
+
 	private:
 		/**
 		 * Tries to ensure `buffer` is at least `newBufferSize` bytes long.