$NetBSD: patch-libstdc++-v3_config_locale_dragonfly_c__locale.cc,v 1.1 2012/06/23 22:13:02 marino Exp $

--- libstdc++-v3/config/locale/dragonfly/c_locale.cc.orig	2012-06-22 10:35:30.000000000 +0000
+++ libstdc++-v3/config/locale/dragonfly/c_locale.cc
@@ -0,0 +1,300 @@
+// Wrapper for underlying C-language localization -*- C++ -*-
+
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+// 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+//
+// ISO C++ 14882: 22.8  Standard locale categories.
+//
+
+// Written by Benjamin Kosnik <bkoz@redhat.com>
+
+#include <cerrno>  // For errno
+#include <cmath>  // For isinf, finite, finitef, fabs
+#include <cstdlib>  // For strof, strtold
+#include <cstring>
+#include <cstdio>
+#include <locale>
+#include <limits>
+
+#ifdef _GLIBCXX_HAVE_IEEEFP_H
+#include <ieeefp.h>
+#endif
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+  template<>
+    void
+    __convert_to_v(const char* __s, float& __v, ios_base::iostate& __err,
+		   const __c_locale&) throw()
+    {
+      // Assumes __s formatted for "C" locale.
+      char* __old = setlocale(LC_ALL, 0);
+      const size_t __len = strlen(__old) + 1;
+      char* __sav = new char[__len];
+      memcpy(__sav, __old, __len);
+      setlocale(LC_ALL, "C");
+      char* __sanity;
+      bool __overflow = false;
+
+#if !__FLT_HAS_INFINITY__
+      errno = 0;
+#endif
+
+#ifdef _GLIBCXX_HAVE_STRTOF
+      __v = strtof(__s, &__sanity);
+#else
+      double __d = strtod(__s, &__sanity);
+      __v = static_cast<float>(__d);
+#ifdef _GLIBCXX_HAVE_FINITEF
+      if (!finitef (__v))
+	__overflow = true;
+#elif defined (_GLIBCXX_HAVE_FINITE)
+      if (!finite (static_cast<double> (__v)))
+	__overflow = true;
+#elif defined (_GLIBCXX_HAVE_ISINF)
+      if (isinf (static_cast<double> (__v)))
+	__overflow = true;
+#else
+      if (fabs(__d) > numeric_limits<float>::max())
+	__overflow = true;
+#endif
+#endif // _GLIBCXX_HAVE_STRTOF
+
+      // _GLIBCXX_RESOLVE_LIB_DEFECTS
+      // 23. Num_get overflow result.
+      if (__sanity == __s || *__sanity != '\0')
+	{
+	  __v = 0.0f;
+	  __err = ios_base::failbit;
+	}
+      else if (__overflow
+#if __FLT_HAS_INFINITY__
+	       || __v == numeric_limits<float>::infinity()
+	       || __v == -numeric_limits<float>::infinity()
+#else
+	       || ((__v > 1.0f || __v < -1.0f) && errno == ERANGE)
+#endif
+	      )
+	{
+	  if (__v > 0.0f)
+	    __v = numeric_limits<float>::max();
+	  else
+	    __v = -numeric_limits<float>::max();
+	  __err = ios_base::failbit;
+	}
+
+      setlocale(LC_ALL, __sav);
+      delete [] __sav;
+    }
+
+  template<>
+    void
+    __convert_to_v(const char* __s, double& __v, ios_base::iostate& __err,
+		   const __c_locale&) throw()
+    {
+      // Assumes __s formatted for "C" locale.
+      char* __old = setlocale(LC_ALL, 0);
+      const size_t __len = strlen(__old) + 1;
+      char* __sav = new char[__len];
+      memcpy(__sav, __old, __len);
+      setlocale(LC_ALL, "C");
+      char* __sanity;
+
+#if !__DBL_HAS_INFINITY__
+      errno = 0;
+#endif
+
+      __v = strtod(__s, &__sanity);
+
+      // _GLIBCXX_RESOLVE_LIB_DEFECTS
+      // 23. Num_get overflow result.
+      if (__sanity == __s || *__sanity != '\0')
+	{
+	  __v = 0.0;
+	  __err = ios_base::failbit;
+	}
+      else if (
+#if __DBL_HAS_INFINITY__
+	       __v == numeric_limits<double>::infinity()
+	       || __v == -numeric_limits<double>::infinity())
+#else
+	       (__v > 1.0 || __v < -1.0) && errno == ERANGE)
+#endif
+	{
+	  if (__v > 0.0)
+	    __v = numeric_limits<double>::max();
+	  else
+	    __v = -numeric_limits<double>::max();
+	  __err = ios_base::failbit;
+	}
+
+      setlocale(LC_ALL, __sav);
+      delete [] __sav;
+    }
+
+  template<>
+    void
+    __convert_to_v(const char* __s, long double& __v,
+		   ios_base::iostate& __err, const __c_locale&) throw()
+    {
+      // Assumes __s formatted for "C" locale.
+      char* __old = setlocale(LC_ALL, 0);
+      const size_t __len = strlen(__old) + 1;
+      char* __sav = new char[__len];
+      memcpy(__sav, __old, __len);
+      setlocale(LC_ALL, "C");
+
+#if !__LDBL_HAS_INFINITY__
+      errno = 0;
+#endif
+
+#if defined(_GLIBCXX_HAVE_STRTOLD) && !defined(_GLIBCXX_HAVE_BROKEN_STRTOLD)
+      char* __sanity;
+      __v = strtold(__s, &__sanity);
+
+      // _GLIBCXX_RESOLVE_LIB_DEFECTS
+      // 23. Num_get overflow result.
+      if (__sanity == __s || *__sanity != '\0')
+#else
+      typedef char_traits<char>::int_type int_type;
+      int __p = sscanf(__s, "%Lf", &__v);
+
+      if (!__p || static_cast<int_type>(__p) == char_traits<char>::eof())
+#endif
+	{
+	  __v = 0.0l;
+	  __err = ios_base::failbit;
+	}
+       else if (
+#if __LDBL_HAS_INFINITY__
+		__v == numeric_limits<long double>::infinity()
+		|| __v == -numeric_limits<long double>::infinity())
+#else
+		(__v > 1.0l || __v < -1.0l) && errno == ERANGE)
+#endif
+	{
+	  if (__v > 0.0l)
+	    __v = numeric_limits<long double>::max();
+	  else
+	    __v = -numeric_limits<long double>::max();
+	  __err = ios_base::failbit;
+	}
+
+      setlocale(LC_ALL, __sav);
+      delete [] __sav;
+    }
+
+
+  /*  DragonFly's implementation of setlocale won't accept something like
+      "de_DE".  According to nls manpage, the expected format is:
+      language[_territory][.codeset][@modifier], but it seems that both
+      the _territory and .codeset components are required.
+      
+      As an attempt to correct for this, we'll tack on ".UTF-8" if 
+      a period is not detected in the locale string.  
+
+      There are no locales with modifiers on DragonFly so if found, they
+      will just be stripped off silently.  e.g "de_DE@euro" will be reduced
+      to "de_DE".  The UTF-8 default would be added after that.
+  */
+
+  void
+  locale::facet::_S_create_c_locale(__c_locale& __cloc, const char* __s,
+				    __c_locale)
+  {
+    const size_t size__s = (__s == NULL) ? 1 : strlen (__s);
+    const char UTF8[] = ".UTF-8";
+    char localspec[size__s + 6 + 1];
+    
+    if (__s == NULL) {
+       localspec[0] = NULL;
+    } else {
+       strcpy (localspec, __s);
+       char * pch = strchr (localspec, '@');
+       if (pch != NULL)
+          *pch = 0;
+
+       if (  (strchr (__s, '.') == NULL)
+          && (strcmp (__s, "C") != 0)
+          && (strcmp (__s, "POSIX") != 0))
+          strncat (localspec, UTF8, 6);
+    }
+
+    const char * result = std::setlocale(LC_ALL, localspec);
+    
+    if ((strcmp(result, "C") != 0) && (strcmp (result, localspec) != 0))
+      __throw_runtime_error(__N("locale::facet::_S_create_c_locale "
+			    "name not valid"));
+    __cloc = 0;
+  }
+
+  void
+  locale::facet::_S_destroy_c_locale(__c_locale& __cloc)
+  { __cloc = 0; }
+
+  __c_locale
+  locale::facet::_S_clone_c_locale(__c_locale&) throw()
+  { return __c_locale(); }
+
+  __c_locale
+  locale::facet::_S_lc_ctype_c_locale(__c_locale, const char*)
+  { return __c_locale(); }
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+  const char* const category_names[6 + _GLIBCXX_NUM_CATEGORIES] =
+    {
+      "LC_CTYPE",
+      "LC_NUMERIC",
+      "LC_TIME",
+      "LC_COLLATE",
+      "LC_MONETARY",
+      "LC_MESSAGES"
+    };
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+  const char* const* const locale::_S_categories = __gnu_cxx::category_names;
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+// XXX GLIBCXX_ABI Deprecated
+#ifdef _GLIBCXX_LONG_DOUBLE_COMPAT
+#define _GLIBCXX_LDBL_COMPAT(dbl, ldbl) \
+  extern "C" void ldbl (void) __attribute__ ((alias (#dbl)))
+_GLIBCXX_LDBL_COMPAT(_ZSt14__convert_to_vIdEvPKcRT_RSt12_Ios_IostateRKPi, _ZSt14__convert_to_vIeEvPKcRT_RSt12_Ios_IostateRKPi);
+#endif // _GLIBCXX_LONG_DOUBLE_COMPAT
