1// String Conversions -*- C++ -*- 2 3// Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 3, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// Under Section 7 of GPL version 3, you are granted additional 17// permissions described in the GCC Runtime Library Exception, version 18// 3.1, as published by the Free Software Foundation. 19 20// You should have received a copy of the GNU General Public License and 21// a copy of the GCC Runtime Library Exception along with this program; 22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23// <http://www.gnu.org/licenses/>. 24 25/** @file ext/string_conversions.h 26 * This file is a GNU extension to the Standard C++ Library. 27 */ 28 29#ifndef _STRING_CONVERSIONS_H 30#define _STRING_CONVERSIONS_H 1 31 32#pragma GCC system_header 33 34#include <bits/c++config.h> 35#include <ext/numeric_traits.h> 36#include <bits/functexcept.h> 37#include <cstdlib> 38#include <cwchar> 39#include <cstdio> 40#include <cerrno> 41 42namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 43{ 44_GLIBCXX_BEGIN_NAMESPACE_VERSION 45 46 // Helper for all the sto* functions. 47 template<typename _TRet, typename _Ret = _TRet, typename _CharT, 48 typename... _Base> 49 _Ret 50 __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...), 51 const char* __name, const _CharT* __str, std::size_t* __idx, 52 _Base... __base) 53 { 54 _Ret __ret; 55 56 _CharT* __endptr; 57 errno = 0; 58 const _TRet __tmp = __convf(__str, &__endptr, __base...); 59 60 if (__endptr == __str) 61 std::__throw_invalid_argument(__name); 62 else if (errno == ERANGE 63 || (std::__are_same<_Ret, int>::__value 64 && (__tmp < __numeric_traits<int>::__min 65 || __tmp > __numeric_traits<int>::__max))) 66 std::__throw_out_of_range(__name); 67 else 68 __ret = __tmp; 69 70 if (__idx) 71 *__idx = __endptr - __str; 72 73 return __ret; 74 } 75 76 // Helper for the to_string / to_wstring functions. 77 template<typename _String, typename _CharT = typename _String::value_type> 78 _String 79 __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*, 80 __builtin_va_list), std::size_t __n, 81 const _CharT* __fmt, ...) 82 { 83 // XXX Eventually the result will be constructed in place in 84 // the C++0x string, likely with the help of internal hooks. 85 _CharT* __s = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) 86 * __n)); 87 88 __builtin_va_list __args; 89 __builtin_va_start(__args, __fmt); 90 91 const int __len = __convf(__s, __n, __fmt, __args); 92 93 __builtin_va_end(__args); 94 95 return _String(__s, __s + __len); 96 } 97 98_GLIBCXX_END_NAMESPACE_VERSION 99} // namespace 100 101#endif // _STRING_CONVERSIONS_H 102