c_locale.cc revision 169691
1210284Sjmallett// Wrapper for underlying C-language localization -*- C++ -*- 2210284Sjmallett 3210284Sjmallett// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 4210284Sjmallett// Free Software Foundation, Inc. 5210284Sjmallett// 6210284Sjmallett// This file is part of the GNU ISO C++ Library. This library is free 7210284Sjmallett// software; you can redistribute it and/or modify it under the 8210284Sjmallett// terms of the GNU General Public License as published by the 9210284Sjmallett// Free Software Foundation; either version 2, or (at your option) 10210284Sjmallett// any later version. 11210284Sjmallett 12210284Sjmallett// This library is distributed in the hope that it will be useful, 13210284Sjmallett// but WITHOUT ANY WARRANTY; without even the implied warranty of 14210284Sjmallett// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15210284Sjmallett// GNU General Public License for more details. 16210284Sjmallett 17210284Sjmallett// You should have received a copy of the GNU General Public License along 18210284Sjmallett// with this library; see the file COPYING. If not, write to the Free 19210284Sjmallett// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 20210284Sjmallett// USA. 21210284Sjmallett 22210284Sjmallett// As a special exception, you may use this file as part of a free software 23210284Sjmallett// library without restriction. Specifically, if other files instantiate 24210284Sjmallett// templates or use macros or inline functions from this file, or you compile 25210284Sjmallett// this file and link it with other files to produce an executable, this 26210284Sjmallett// file does not by itself cause the resulting executable to be covered by 27210284Sjmallett// the GNU General Public License. This exception does not however 28210284Sjmallett// invalidate any other reasons why the executable file might be covered by 29210284Sjmallett// the GNU General Public License. 30210284Sjmallett 31210284Sjmallett// 32210284Sjmallett// ISO C++ 14882: 22.8 Standard locale categories. 33210284Sjmallett// 34210284Sjmallett 35210284Sjmallett// Written by Benjamin Kosnik <bkoz@redhat.com> 36210284Sjmallett 37210284Sjmallett#include <cerrno> // For errno 38210284Sjmallett#include <cmath> // For isinf, finite, finitef, fabs 39210284Sjmallett#include <cstdlib> // For strof, strtold 40210284Sjmallett#include <locale> 41210284Sjmallett 42210284Sjmallett#ifdef _GLIBCXX_HAVE_IEEEFP_H 43210284Sjmallett#include <ieeefp.h> 44210284Sjmallett#endif 45210284Sjmallett 46210284Sjmallett_GLIBCXX_BEGIN_NAMESPACE(std) 47210284Sjmallett 48210284Sjmallett // Specializations for all types used in num_get. 49210284Sjmallett template<> 50210284Sjmallett void 51210284Sjmallett __convert_to_v(const char* __s, float& __v, ios_base::iostate& __err, 52210284Sjmallett const __c_locale&) 53210284Sjmallett { 54210284Sjmallett // Assumes __s formatted for "C" locale. 55210311Sjmallett errno = 0; 56210284Sjmallett char* __old = strdup(setlocale(LC_ALL, NULL)); 57210284Sjmallett setlocale(LC_ALL, "C"); 58210311Sjmallett char* __sanity; 59210284Sjmallett#if defined(_GLIBCXX_HAVE_STRTOF) 60210284Sjmallett float __f = strtof(__s, &__sanity); 61210284Sjmallett#else 62210284Sjmallett double __d = strtod(__s, &__sanity); 63210284Sjmallett float __f = static_cast<float>(__d); 64210284Sjmallett#ifdef _GLIBCXX_HAVE_FINITEF 65210284Sjmallett if (!finitef (__f)) 66210284Sjmallett errno = ERANGE; 67210284Sjmallett#elif defined (_GLIBCXX_HAVE_FINITE) 68210284Sjmallett if (!finite (static_cast<double> (__f))) 69210284Sjmallett errno = ERANGE; 70210284Sjmallett#elif defined (_GLIBCXX_HAVE_ISINF) 71210284Sjmallett if (isinf (static_cast<double> (__f))) 72210284Sjmallett errno = ERANGE; 73210284Sjmallett#else 74210284Sjmallett if (fabs(__d) > numeric_limits<float>::max()) 75210284Sjmallett errno = ERANGE; 76210284Sjmallett#endif 77210284Sjmallett#endif 78210284Sjmallett if (__sanity != __s && errno != ERANGE) 79210284Sjmallett __v = __f; 80210284Sjmallett else 81210284Sjmallett __err |= ios_base::failbit; 82210284Sjmallett setlocale(LC_ALL, __old); 83210284Sjmallett free(__old); 84210284Sjmallett } 85210284Sjmallett 86210284Sjmallett template<> 87210284Sjmallett void 88210284Sjmallett __convert_to_v(const char* __s, double& __v, ios_base::iostate& __err, 89210284Sjmallett const __c_locale&) 90210284Sjmallett { 91210284Sjmallett // Assumes __s formatted for "C" locale. 92210284Sjmallett errno = 0; 93210284Sjmallett char* __old = strdup(setlocale(LC_ALL, NULL)); 94210284Sjmallett setlocale(LC_ALL, "C"); 95210284Sjmallett char* __sanity; 96210284Sjmallett double __d = strtod(__s, &__sanity); 97210284Sjmallett if (__sanity != __s && errno != ERANGE) 98210284Sjmallett __v = __d; 99210284Sjmallett else 100210284Sjmallett __err |= ios_base::failbit; 101210284Sjmallett setlocale(LC_ALL, __old); 102210284Sjmallett free(__old); 103210284Sjmallett } 104210284Sjmallett 105210284Sjmallett template<> 106210284Sjmallett void 107210284Sjmallett __convert_to_v(const char* __s, long double& __v, 108210284Sjmallett ios_base::iostate& __err, const __c_locale&) 109210284Sjmallett { 110210284Sjmallett // Assumes __s formatted for "C" locale. 111210284Sjmallett errno = 0; 112210284Sjmallett char* __old = strdup(setlocale(LC_ALL, NULL)); 113210284Sjmallett setlocale(LC_ALL, "C"); 114210284Sjmallett#if defined(_GLIBCXX_HAVE_STRTOLD) 115210284Sjmallett char* __sanity; 116210284Sjmallett long double __ld = strtold(__s, &__sanity); 117210284Sjmallett if (__sanity != __s && errno != ERANGE) 118210284Sjmallett __v = __ld; 119210284Sjmallett#else 120210284Sjmallett typedef char_traits<char>::int_type int_type; 121210284Sjmallett long double __ld; 122210284Sjmallett int __p = sscanf(__s, "%Lf", &__ld); 123210284Sjmallett if (__p && static_cast<int_type>(__p) != char_traits<char>::eof() 124210284Sjmallett && errno != ERANGE) 125210284Sjmallett __v = __ld; 126210284Sjmallett#endif 127210284Sjmallett else 128210284Sjmallett __err |= ios_base::failbit; 129210284Sjmallett setlocale(LC_ALL, __old); 130210284Sjmallett free(__old); 131210284Sjmallett } 132210284Sjmallett 133210284Sjmallett void 134210284Sjmallett locale::facet::_S_create_c_locale(__c_locale& __cloc, const char* __s, 135210284Sjmallett __c_locale) 136210284Sjmallett { 137210284Sjmallett // Currently, the generic model only supports the "C" locale. 138210284Sjmallett // See http://gcc.gnu.org/ml/libstdc++/2003-02/msg00345.html 139210284Sjmallett __cloc = NULL; 140210284Sjmallett if (strcmp(__s, "C")) 141210284Sjmallett __throw_runtime_error(__N("locale::facet::_S_create_c_locale " 142210284Sjmallett "name not valid")); 143210284Sjmallett } 144210284Sjmallett 145210284Sjmallett void 146210284Sjmallett locale::facet::_S_destroy_c_locale(__c_locale& __cloc) 147210284Sjmallett { __cloc = NULL; } 148210284Sjmallett 149210284Sjmallett __c_locale 150210284Sjmallett locale::facet::_S_clone_c_locale(__c_locale&) 151210284Sjmallett { return __c_locale(); } 152210284Sjmallett 153210284Sjmallett_GLIBCXX_END_NAMESPACE 154210284Sjmallett 155210284Sjmallett_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) 156210284Sjmallett 157210284Sjmallett const char* const category_names[6 + _GLIBCXX_NUM_CATEGORIES] = 158210284Sjmallett { 159210284Sjmallett "LC_CTYPE", 160210284Sjmallett "LC_NUMERIC", 161210284Sjmallett "LC_TIME", 162210284Sjmallett "LC_COLLATE", 163210284Sjmallett "LC_MONETARY", 164210284Sjmallett "LC_MESSAGES" 165210284Sjmallett }; 166210284Sjmallett 167210284Sjmallett_GLIBCXX_END_NAMESPACE 168210284Sjmallett 169210284Sjmallett_GLIBCXX_BEGIN_NAMESPACE(std) 170210284Sjmallett 171210284Sjmallett const char* const* const locale::_S_categories = __gnu_cxx::category_names; 172210284Sjmallett 173210284Sjmallett_GLIBCXX_END_NAMESPACE 174210284Sjmallett 175210284Sjmallett// XXX GLIBCXX_ABI Deprecated 176210284Sjmallett#ifdef _GLIBCXX_LONG_DOUBLE_COMPAT 177210284Sjmallett#define _GLIBCXX_LDBL_COMPAT(dbl, ldbl) \ 178210284Sjmallett extern "C" void ldbl (void) __attribute__ ((alias (#dbl))) 179210284Sjmallett_GLIBCXX_LDBL_COMPAT(_ZSt14__convert_to_vIdEvPKcRT_RSt12_Ios_IostateRKPi, _ZSt14__convert_to_vIeEvPKcRT_RSt12_Ios_IostateRKPi); 180210284Sjmallett#endif // _GLIBCXX_LONG_DOUBLE_COMPAT 181210284Sjmallett