re PR libstdc++/12077 ([3.4 only] wcin.rdbuf()->in_avail() return value too high)

2004-03-19  Paolo Carlini  <pcarlini@suse.de>
	    Petur Runolfsson  <peturr02@ru.is>

	PR libstdc++/12077
	* include/ext/stdio_sync_filebuf.h (showmanyc): Remove, there's
	no way to find out the conversion used by the underlying FILE*.
	* testsuite/ext/stdio_sync_filebuf/wchar_t/12077.cc: New.
	* testsuite/27_io/objects/char/9.cc: Tweak.

Co-Authored-By: Petur Runolfsson <peturr02@ru.is>

From-SVN: r79695

4 files changed, 92 insertions, 32 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index a2dd65e..e648e0a 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,4 +1,13 @@
 2004-03-19  Paolo Carlini  <pcarlini@suse.de>
+	    Petur Runolfsson  <peturr02@ru.is>
+
+	PR libstdc++/12077
+	* include/ext/stdio_sync_filebuf.h (showmanyc): Remove, there's
+	no way to find out the conversion used by the underlying FILE*.
+	* testsuite/ext/stdio_sync_filebuf/wchar_t/12077.cc: New.
+	* testsuite/27_io/objects/char/9.cc: Tweak.
+
+2004-03-19  Paolo Carlini  <pcarlini@suse.de>
 
 	PR libstdc++/14648
 	* include/ext/ropeimpl.h (rope<>::_S_apply_to_pieces): Fix
diff --git a/libstdc++-v3/include/ext/stdio_sync_filebuf.h b/libstdc++-v3/include/ext/stdio_sync_filebuf.h
index 2076ca5..cdf1e7c 100644
--- a/libstdc++-v3/include/ext/stdio_sync_filebuf.h
+++ b/libstdc++-v3/include/ext/stdio_sync_filebuf.h
@@ -1,6 +1,6 @@
 // Iostreams wrapper for stdio FILE* -*- C++ -*-
 
-// Copyright (C) 2003 Free Software Foundation, Inc.
+// Copyright (C) 2003, 2004 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
@@ -38,16 +38,6 @@
 
 #include <streambuf>
 #include <unistd.h>
-
-#if defined(_GLIBCXX_HAVE_S_ISREG) || defined(_GLIBCXX_HAVE_S_IFREG)
-# include <sys/stat.h>
-# ifdef _GLIBCXX_HAVE_S_ISREG
-#  define _GLIBCXX_ISREG(x) S_ISREG(x)
-# else
-#  define _GLIBCXX_ISREG(x) (((x) & S_IFMT) == S_IFREG)
-# endif
-#endif
-
 #include <cstdio>
 
 #ifdef _GLIBCXX_USE_WCHAR_T
@@ -82,7 +72,6 @@ namespace __gnu_cxx
       { }
 
     protected:
-
       int_type
       syncgetc();
 
@@ -132,19 +121,6 @@ namespace __gnu_cxx
       virtual std::streamsize
       xsgetn(char_type* __s, std::streamsize __n);
 
-      virtual std::streamsize
-      showmanyc()
-      {
-#if defined(_GLIBCXX_HAVE_S_ISREG) || defined(_GLIBCXX_HAVE_S_IFREG)
-	// Regular files.
-	struct stat __buffer;
-	int __ret = fstat(fileno(_M_file), &__buffer);
-	if (!__ret && _GLIBCXX_ISREG(__buffer.st_mode))
-	  return __buffer.st_size - ftell(_M_file);
-#endif
-	return 0;
-      }
-
       virtual int_type
       overflow(int_type __c = traits_type::eof())
       {
diff --git a/libstdc++-v3/testsuite/27_io/objects/char/9.cc b/libstdc++-v3/testsuite/27_io/objects/char/9.cc
index 374fce4..ae62173 100644
--- a/libstdc++-v3/testsuite/27_io/objects/char/9.cc
+++ b/libstdc++-v3/testsuite/27_io/objects/char/9.cc
@@ -1,6 +1,6 @@
 // 2003-05-01  Petur Runolfsson  <peturr02@ru.is>
 
-// Copyright (C) 2003 Free Software Foundation, Inc.
+// Copyright (C) 2003, 2004 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
@@ -18,10 +18,6 @@
 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
 // USA.
  
-// The ARM simulator does not provide support for "fstat", which
-// causes "in_avail" to return an incorrect value.
-// { dg-do run { xfail arm-none-elf } }
-
 #include <iostream>
 #include <cstdio>
 #include <testsuite_hooks.h>
@@ -39,8 +35,8 @@ void test09()
 
   freopen(name, "r", stdin);
  
-  // The number of unread characters should be 4 (a, b, c, \\n)
-  VERIFY( 4 == std::cin.rdbuf()->in_avail() );
+  // basic_streambuf::showmanyc returns 0.
+  VERIFY( 0 == std::cin.rdbuf()->in_avail() );
 }
 
 int 
diff --git a/libstdc++-v3/testsuite/ext/stdio_sync_filebuf/wchar_t/12077.cc b/libstdc++-v3/testsuite/ext/stdio_sync_filebuf/wchar_t/12077.cc
new file mode 100644
index 0000000..9ba9eb5
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/stdio_sync_filebuf/wchar_t/12077.cc
@@ -0,0 +1,79 @@
+// Copyright (C) 2004 Free Software Foundation
+//
+// 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
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+#include <iostream>
+#include <locale>
+#include <testsuite_hooks.h>
+
+// libstdc++/12077
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  const char* name = "12077_tmp";
+
+  locale loc = __gnu_test::try_named_locale("is_IS.UTF-8");
+  locale::global(loc);
+  wcin.imbue(loc);
+
+  const char* str =
+    "\x1\x2\x3\x4\x5\x6\x7\x8\x9\xa\xb\xc\xd\xe\xf\x10\x11\x12\x13"
+    "\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20!\"#$%&"
+    "'()*+,-./0123456789:;<=>?@}~\x7f\xc2\x80\xc2\x81\xc2\x82\xc2"
+    "\x83\xc2\x84\xc2\x85\xc2\x86\xc2\x87\xc2\x88\xc2\x89\xc2\x8a"
+    "\xc2\x8b\xc2\x8c\xc2\x8d\xc2\x8e\xc2\x8f\xc2\x90\xc2\x91\xc2"
+    "\x92\xc2\x93\xc2\x94\xc2\x95\xc2\x96\xc2\x97\xc2\x98\xc2\x99"
+    "\xc2\x9a\xc2\x9b\xc2\x9c\xc3\xba\xc3\xbb\xc3\xbc\xc3\xbd\xc3"
+    "\xbe\xc3\xbf\xc4\x80\xc4\x81\xc4\x82\xc4\x83\xc4\x84\xc4\x85"
+    "\xc4\x86\xc4\x87\xc4\x88\xc4\x89\xc4\x8a\xc4\x8b\xc4\x8c\xc4"
+    "\x8d\xc4\x8e\xc4\x8f\xc4\x90\xc4\x91\xc4\x92\xc4\x93\xc4\x94"
+    "\xc4\x95\xc4\x96\xc4\x97\xc4\x98\xc4\x99\xdf\xb8\xdf\xb9\xdf"
+    "\xba\xdf\xbb\xdf\xbc\xdf\xbd\xdf\xbe\xdf\xbf\xe0\xa0\x80\xe0"
+    "\xa0\x81\xe0\xa0\x82\xe0\xa0\x83\xe0\xa0\x84\xe0\xa0\x85\xe0"
+    "\xa0\x86\xe0\xa0\x87\xe0\xa0\x88\xe0\xa0\x89\xe0\xa0\x8a\xe0"
+    "\xa0\x8b\xe0\xa0\x8c\xe0\xa0\x8d\xe0\xa0\x8e\xe0\xa0\x8f\xe0"
+    "\xa0\x90\xe0\xa0\x91\xe0\xa0\x92\xe0\xa0\x93\xe0\xa0\x94\xe0"
+    "\xa0\x95\xe0\xa0\x96\xe0\xa0\x97\x1\x2\x4\x8\x10\x20@\xc2\x80"
+    "\xc4\x80\xc8\x80\xd0\x80\xe0\xa0\x80\xe1\x80\x80\xe2\x80\x80"
+    "\xe4\x80\x80\xe8\x80\x80\xf0\x90\x80\x80\xf0\xa0\x80\x80\xf1"
+    "\x80\x80\x80\xf2\x80\x80\x80\xf4\x80\x80\x80\xf8\x88\x80\x80"
+    "\x80\xf8\x90\x80\x80\x80\xf8\xa0\x80\x80\x80\xf9\x80\x80\x80"
+    "\x80\xfa\x80\x80\x80\x80\xfc\x84\x80\x80\x80\x80\xfc\x88\x80"
+    "\x80\x80\x80\xfc\x90\x80\x80\x80\x80\xfc\xa0\x80\x80\x80\x80"
+    "\xfd\x80\x80\x80\x80\x80";
+
+  FILE* file = fopen(name, "w");
+  fputs(str, file);
+  fclose(file);
+  
+  freopen(name, "r", stdin);
+  
+  streamsize n = wcin.rdbuf()->in_avail();
+  while (n--)
+    {
+      wint_t c = wcin.rdbuf()->sbumpc();
+      VERIFY( c != WEOF );
+    }
+}
+
+int main()
+{
+  test01();
+  return 0;
+}