From c0b84d79d2533597dcce00eaddc0652aecf9fe87 Mon Sep 17 00:00:00 2001
From: Vadim Egorov <egorovv@mailandnews.com>
Date: Tue, 9 May 2000 07:19:14 +0000
Subject: [PATCH] streambuf.tcc (basic_streambuf::xsgetn): Fix uflow case.

2000-05-09  Vadim Egorov  <egorovv@mailandnews.com>
	    Benjamin Kosnik  <bkoz@gnu.org>
	    Nathan Myers  <ncm@cantrip.org>
	    Dietmar Kuehl  <dietmar_kuehl@yahoo.com>

        * bits/streambuf.tcc (basic_streambuf::xsgetn): Fix uflow case.
	(basic_streambuf::xsputn): Make consistent.
	* testsuite/27_io/filebuf.cc: Add tests.

Co-Authored-By: Benjamin Kosnik <bkoz@gnu.org>
Co-Authored-By: Dietmar Kuehl <dietmar_kuehl@yahoo.com>
Co-Authored-By: Nathan Myers <ncm@cantrip.org>

From-SVN: r33794
---
 libstdc++-v3/ChangeLog                  |  9 +++++++++
 libstdc++-v3/bits/streambuf.tcc         | 18 ++++++++++--------
 libstdc++-v3/testsuite/27_io/filebuf.cc | 21 ++++++++++++++++++++-
 3 files changed, 39 insertions(+), 9 deletions(-)

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 5980f69..9bc1845 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,12 @@
+2000-05-03  Vadim Egorov  <egorovv@mailandnews.com>
+	    Benjamin Kosnik  <bkoz@gnu.org>
+	    Nathan Myers  <ncm@cantrip.org>
+	    Dietmar Kuehl  <dietmar_kuehl@yahoo.com> 
+
+        * bits/streambuf.tcc (basic_streambuf::xsgetn): Fix uflow case.
+	(basic_streambuf::xsputn): Make consistent.
+	* testsuite/27_io/filebuf.cc: Add tests.
+	
 2000-05-08  Steven King  <sxking@uswest.net>
 
         * bits/char_traits.h: use wchar_t utility functions for
diff --git a/libstdc++-v3/bits/streambuf.tcc b/libstdc++-v3/bits/streambuf.tcc
index 8aeb421..45eb332 100644
--- a/libstdc++-v3/bits/streambuf.tcc
+++ b/libstdc++-v3/bits/streambuf.tcc
@@ -1,6 +1,6 @@
 // Stream buffer classes -*- C++ -*-
 
-// Copyright (C) 1997-1999 Free Software Foundation, Inc.
+// Copyright (C) 1997-1999, 2000 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
 // software; you can redistribute it and/or modify it under the
@@ -145,10 +145,12 @@ namespace std {
 	      
 	      if (__retval != __n)
 		{
-		  if (this->uflow() != traits_type::eof())
-		    ++__retval;
-		  else
-		    break;
+		  int_type __c = this->uflow();  
+		  if (traits_type::eq_int_type(__c, traits_type::eof()))
+                    break;
+
+		  traits_type::assign(*__s++, traits_type::to_char_type(__c));
+                  ++__retval;
 		}
 	    }
 	}
@@ -175,9 +177,9 @@ namespace std {
 	      bool __testout = _M_mode & ios_base::out;
 	      if (!(__testput && __testout))
 		{
-		  char_type __c = *__s;
-		  char_type __overfc = this->overflow(__c);
-		  if (__c == __overfc)
+		  int_type __c = traits_type::to_int_type(*__s);
+		  int_type __overfc = this->overflow(__c);
+		  if (traits_type::eq_int_type(__c, __overfc))
 		    {
 		      ++__retval;
 		      ++__s;
diff --git a/libstdc++-v3/testsuite/27_io/filebuf.cc b/libstdc++-v3/testsuite/27_io/filebuf.cc
index 586388e..40e6cc6 100644
--- a/libstdc++-v3/testsuite/27_io/filebuf.cc
+++ b/libstdc++-v3/testsuite/27_io/filebuf.cc
@@ -503,12 +503,31 @@ bool test03() {
   return test;
 }
 
+bool test04()
+{
+  using namespace std;
+  typedef istream::int_type	int_type;
+
+  bool test = true;
+  ifstream ifs(name_02);
+  char buffer[] = "xxxxxxxxxx";
+  int_type len1 = ifs.rdbuf()->sgetn(buffer, sizeof(buffer));
+  test &= len1 == sizeof(buffer);
+  test &= buffer[0] == 'a';
 
-int main() {
+#ifdef DEBUG_ASSERT
+  assert(test);
+#endif
+  return test;
+}
+
+int main() 
+{
   test00();
   test01();
   test02();
   test03();
+  test04();
 
   return 0;
 }
-- 
2.7.4