1 // String Conversions -*- C++ -*-
3 // Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
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)
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.
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.
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/>.
25 /** @file ext/string_conversions.h
26 * This file is a GNU extension to the Standard C++ Library.
29 #ifndef _STRING_CONVERSIONS_H
30 #define _STRING_CONVERSIONS_H 1
32 #pragma GCC system_header
34 #include <bits/c++config.h>
35 #include <ext/numeric_traits.h>
36 #include <bits/functexcept.h>
42 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
44 _GLIBCXX_BEGIN_NAMESPACE_VERSION
46 // Helper for all the sto* functions.
47 template<typename _TRet, typename _Ret = _TRet, typename _CharT,
50 __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
51 const char* __name, const _CharT* __str, std::size_t* __idx,
58 const _TRet __tmp = __convf(__str, &__endptr, __base...);
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);
71 *__idx = __endptr - __str;
76 // Helper for the to_string / to_wstring functions.
77 template<typename _String, typename _CharT = typename _String::value_type>
79 __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
80 __builtin_va_list), std::size_t __n,
81 const _CharT* __fmt, ...)
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)
88 __builtin_va_list __args;
89 __builtin_va_start(__args, __fmt);
91 const int __len = __convf(__s, __n, __fmt, __args);
93 __builtin_va_end(__args);
95 return _String(__s, __s + __len);
98 _GLIBCXX_END_NAMESPACE_VERSION
101 #endif // _STRING_CONVERSIONS_H