From 08fee9a284cc082822392b38574fd2d4b0afb843 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Wed, 6 Aug 2014 17:52:56 +0200
Subject: util/ForeignFifoBuffer: add method GetAvailable()

---
 src/util/DynamicFifoBuffer.hxx | 3 ++-
 src/util/ForeignFifoBuffer.hxx | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/util/DynamicFifoBuffer.hxx b/src/util/DynamicFifoBuffer.hxx
index d441b4484..91cbbc4c7 100644
--- a/src/util/DynamicFifoBuffer.hxx
+++ b/src/util/DynamicFifoBuffer.hxx
@@ -54,6 +54,7 @@ public:
 
 	using ForeignFifoBuffer<T>::IsEmpty;
 	using ForeignFifoBuffer<T>::IsFull;
+	using ForeignFifoBuffer<T>::GetAvailable;
 	using ForeignFifoBuffer<T>::Read;
 	using ForeignFifoBuffer<T>::Consume;
 	using ForeignFifoBuffer<T>::Write;
@@ -73,7 +74,7 @@ public:
 			/* we already have enough space */
 			return;
 
-		const size_type in_use = Read().size;
+		const size_type in_use = GetAvailable();
 		const size_type required_capacity = in_use + n;
 		size_type new_capacity = GetCapacity();
 		do {
diff --git a/src/util/ForeignFifoBuffer.hxx b/src/util/ForeignFifoBuffer.hxx
index c119fb6d5..cd6fb6101 100644
--- a/src/util/ForeignFifoBuffer.hxx
+++ b/src/util/ForeignFifoBuffer.hxx
@@ -171,6 +171,10 @@ public:
 		tail += n;
 	}
 
+	constexpr size_type GetAvailable() const {
+		return tail - head;
+	}
+
 	/**
 	 * Return a buffer range which may be read.  The buffer pointer is
 	 * writable, to allow modifications while parsing.
-- 
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