From 11b87182b0a59685b82d6b825b81f416728f051f Mon Sep 17 00:00:00 2001
From: Howard Hinnant <hhinnant@apple.com>
Date: Mon, 1 Jul 2013 00:37:50 +0000
Subject: [PATCH] In istream::ignore, check the delimeter as an int_type, not
 as a char_type, so as to correctly handle EOF.  This fixes
 http://llvm.org/bugs/show_bug.cgi?id=16427

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@185298 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/istream                               |  6 ++--
 .../istream.unformatted/ignore_0xff.pass.cpp  | 34 +++++++++++++++++++
 2 files changed, 36 insertions(+), 4 deletions(-)
 create mode 100644 test/input.output/iostream.format/input.streams/istream.unformatted/ignore_0xff.pass.cpp

diff --git a/include/istream b/include/istream
index 3f629f68..f3e74c38 100644
--- a/include/istream
+++ b/include/istream
@@ -1144,8 +1144,7 @@ basic_istream<_CharT, _Traits>::ignore(streamsize __n, int_type __dlm)
                        break;
                     }
                     ++__gc_;
-                    char_type __ch = traits_type::to_char_type(__i);
-                    if (traits_type::eq(__ch, static_cast<char_type>(__dlm)))
+                    if (traits_type::eq_int_type(__i, __dlm))
                         break;
                 }
             }
@@ -1160,8 +1159,7 @@ basic_istream<_CharT, _Traits>::ignore(streamsize __n, int_type __dlm)
                        break;
                     }
                     ++__gc_;
-                    char_type __ch = traits_type::to_char_type(__i);
-                    if (traits_type::eq(__ch, static_cast<char_type>(__dlm)))
+                    if (traits_type::eq_int_type(__i, __dlm))
                         break;
                 }
             }
diff --git a/test/input.output/iostream.format/input.streams/istream.unformatted/ignore_0xff.pass.cpp b/test/input.output/iostream.format/input.streams/istream.unformatted/ignore_0xff.pass.cpp
new file mode 100644
index 00000000..ab0326cf
--- /dev/null
+++ b/test/input.output/iostream.format/input.streams/istream.unformatted/ignore_0xff.pass.cpp
@@ -0,0 +1,34 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <istream>
+
+// basic_istream<charT,traits>&
+//    ignore(streamsize n = 1, int_type delim = traits::eof());
+
+// http://llvm.org/bugs/show_bug.cgi?id=16427
+
+#include <sstream>
+#include <cassert>
+
+int main()
+{
+	int bad=-1;
+	std::ostringstream os;
+	os << "aaaabbbb" << static_cast<char>(bad) 
+	   << "ccccdddd" << std::endl;
+	std::string s=os.str();
+	
+	std::istringstream is(s);
+	const unsigned int ignoreLen=10;
+	size_t a=is.tellg();
+	is.ignore(ignoreLen);
+	size_t b=is.tellg();
+	assert((b-a)==ignoreLen);
+}