From 8283f23651580c57e199f7547f2c0a0512e868be Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Mon, 11 Aug 2014 22:53:48 +0200
Subject: [PATCH] fs/io/TextFile: add method Check()

---
 src/fs/io/TextFile.cxx | 8 ++++++++
 src/fs/io/TextFile.hxx | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/src/fs/io/TextFile.cxx b/src/fs/io/TextFile.cxx
index 5b3bc4505..28d6dabcb 100644
--- a/src/fs/io/TextFile.cxx
+++ b/src/fs/io/TextFile.cxx
@@ -61,3 +61,11 @@ TextFile::ReadLine()
 
 	return buffered_reader->ReadLine();
 }
+
+bool
+TextFile::Check(Error &error) const
+{
+	assert(buffered_reader != nullptr);
+
+	return buffered_reader->Check(error);
+}
diff --git a/src/fs/io/TextFile.hxx b/src/fs/io/TextFile.hxx
index 8bab808c7..5577363e7 100644
--- a/src/fs/io/TextFile.hxx
+++ b/src/fs/io/TextFile.hxx
@@ -56,10 +56,18 @@ public:
 	 * space.  There is a reasonable maximum line length, only to
 	 * prevent denial of service.
 	 *
+	 * Use Check() after nullptr has been returned to check
+	 * whether an error occurred or end-of-file has been reached.
+	 *
 	 * @param file the source file, opened in text mode
 	 * @return a pointer to the line, or nullptr on end-of-file or error
 	 */
 	char *ReadLine();
+
+	/**
+	 * Check whether a ReadLine() call has thrown an error.
+	 */
+	bool Check(Error &error) const;
 };
 
 #endif