[v2] libstdc++: Add hexfloat/defaultfloat io manipulators.

commit 7090c2fca0e3858ea527b66a1eb44fd504f1ba4e
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Mon Sep 22 23:10:54 2014 +0100

    2014-10-06  Rüdiger Sonderfeld  <ruediger@c-plusplus.de>
    	    Jonathan Wakely  <jwakely@redhat.com>
    
    	PR libstdc++/59987
    	* doc/xml/manual/status_cxx2011.xml: Remove hexfloat from notes.
    	* doc/html/manual/status.html: Regenerate.
    	* include/bits/ios_base.h (hexfloat): New function.
    	(defaultfloat): New function.
    	* src/c++98/locale_facets.cc (__num_base::_S_format_float): Support
    	hexadecimal floating point format.
    	* testsuite/27_io/basic_ostream/inserters_arithmetic/char/hexfloat.cc:
    	New file.

diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2011.xml b/libstdc++-v3/doc/xml/manual/status_cxx2011.xml
index 5b36556..108de36 100644
--- a/libstdc++-v3/doc/xml/manual/status_cxx2011.xml
+++ b/libstdc++-v3/doc/xml/manual/status_cxx2011.xml
@@ -2131,7 +2131,6 @@  particular release.
       <entry>
         Missing <code>io_errc</code> and <code>iostream_category</code>.
         <code>ios_base::failure</code> is not derived from <code>system_error</code>.
-	Missing <code>ios_base::hexfloat</code>.
       </entry>
     </row>
     <row>
diff --git a/libstdc++-v3/include/bits/ios_base.h b/libstdc++-v3/include/bits/ios_base.h
index fb448fd..5e33b81 100644
--- a/libstdc++-v3/include/bits/ios_base.h
+++ b/libstdc++-v3/include/bits/ios_base.h
@@ -984,6 +984,27 @@  _GLIBCXX_BEGIN_NAMESPACE_VERSION
     return __base;
   }
 
+#if __cplusplus >= 201103L
+  // New C++11 floatfield manipulators
+
+  /// Calls
+  /// base.setf(ios_base::fixed|ios_base::scientific, ios_base::floatfield)
+  inline ios_base&
+  hexfloat(ios_base& __base)
+  {
+    __base.setf(ios_base::fixed | ios_base::scientific, ios_base::floatfield);
+    return __base;
+  }
+
+  /// Calls @c base.unsetf(ios_base::floatfield)
+  inline ios_base&
+  defaultfloat(ios_base& __base)
+  {
+    __base.unsetf(ios_base::floatfield);
+    return __base;
+  }
+#endif
+
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
diff --git a/libstdc++-v3/src/c++98/locale_facets.cc b/libstdc++-v3/src/c++98/locale_facets.cc
index 3669acb..7ed04e6 100644
--- a/libstdc++-v3/src/c++98/locale_facets.cc
+++ b/libstdc++-v3/src/c++98/locale_facets.cc
@@ -69,19 +69,26 @@  _GLIBCXX_BEGIN_NAMESPACE_VERSION
     if (__flags & ios_base::showpoint)
       *__fptr++ = '#';
 
-    // As per DR 231: _always_, not only when 
-    // __flags & ios_base::fixed || __prec > 0
-    *__fptr++ = '.';
-    *__fptr++ = '*';
+    ios_base::fmtflags __fltfield = __flags & ios_base::floatfield;
+
+    if (__fltfield != (ios_base::fixed | ios_base::scientific))
+      {
+        // As per DR 231: not only when __flags & ios_base::fixed || __prec > 0
+        *__fptr++ = '.';
+        *__fptr++ = '*';
+      }
 
     if (__mod)
       *__fptr++ = __mod;
-    ios_base::fmtflags __fltfield = __flags & ios_base::floatfield;
     // [22.2.2.2.2] Table 58
     if (__fltfield == ios_base::fixed)
       *__fptr++ = 'f';
     else if (__fltfield == ios_base::scientific)
       *__fptr++ = (__flags & ios_base::uppercase) ? 'E' : 'e';
+#ifdef _GLIBCXX_USE_C99
+    else if (__fltfield == (ios_base::fixed | ios_base::scientific))
+      *__fptr++ = (__flags & ios_base::uppercase) ? 'A' : 'a';
+#endif
     else
       *__fptr++ = (__flags & ios_base::uppercase) ? 'G' : 'g';
     *__fptr = '\0';
diff --git a/libstdc++-v3/testsuite/27_io/basic_ostream/inserters_arithmetic/char/hexfloat.cc b/libstdc++-v3/testsuite/27_io/basic_ostream/inserters_arithmetic/char/hexfloat.cc
new file mode 100644
index 0000000..485a485
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_ostream/inserters_arithmetic/char/hexfloat.cc
@@ -0,0 +1,152 @@ 
+// { dg-options "-std=gnu++11" }
+
+// 2014-03-27 Rüdiger Sonderfeld
+// test the hexadecimal floating point inserters (facet num_put)
+
+// Copyright (C) 2014 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
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, 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 COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <iomanip>
+#include <sstream>
+#include <string>
+#include <testsuite_hooks.h>
+
+#ifndef _GLIBCXX_ASSERT
+#  define TEST_NUMPUT_VERBOSE 1
+#endif
+
+#ifdef TEST_NUMPUT_VERBOSE
+#  include <iostream>
+#endif
+
+using namespace std;
+
+void
+test01()
+{
+  ostringstream os;
+  double d = 272.; // 0x1.1p+8;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << os.precision() << endl;
+#endif
+  os << hexfloat << setprecision(1);
+  os << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && std::stod(os.str()) == d );
+  VERIFY( os.str().substr(0, 2) == "0x" );
+  VERIFY( os.str().find('p') != std::string::npos );
+
+  os.str("");
+  os << uppercase << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && std::stod(os.str()) == d );
+  VERIFY( os.str().substr(0, 2) == "0X" );
+  VERIFY( os.str().find('P') != std::string::npos );
+
+  os << nouppercase;
+  os.str("");
+  os << defaultfloat << setprecision(6);
+  os << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && os.str() == "272" );
+
+  os.str("");
+  d = 15.; //0x1.ep+3;
+  os << hexfloat << setprecision(1);
+  os << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && std::stod(os.str()) == d );
+  os.str("");
+  os << uppercase << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && std::stod(os.str()) == d );
+  os << nouppercase;
+  os.str("");
+  os << defaultfloat << setprecision(6);
+  os << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && os.str() == "15" );
+}
+
+void
+test02()
+{
+  ostringstream os;
+  long double d = 272.L; // 0x1.1p+8L;
+  os << hexfloat << setprecision(1);
+  os << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && std::stold(os.str()) == d );
+  os.str("");
+  os << uppercase << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && std::stold(os.str()) == d );
+  os << nouppercase;
+  os.str("");
+  os << defaultfloat << setprecision(6);
+  os << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && os.str() == "272" );
+
+  os.str("");
+  os << hexfloat << setprecision(1);
+  d = 15.; //0x1.ep+3;
+  os << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && std::stold(os.str()) == d );
+  os.str("");
+  os << uppercase << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && std::stold(os.str()) == d );
+  os << nouppercase;
+  os.str("");
+  os << defaultfloat << setprecision(6);
+  os << d;
+#ifdef TEST_NUMPUT_VERBOSE
+  cout << "got: " << os.str() << endl;
+#endif
+  VERIFY( os && os.str() == "15" );
+}
+
+int
+main()
+{
+  test01();
+  test02();
+}