// Versatile string utility -*- C++ -*- // Copyright (C) 2005-2018 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 // . /** @file ext/vstring_util.h * This is an internal header file, included by other library headers. * Do not attempt to use it directly. @headername{ext/vstring.h} */ #ifndef _VSTRING_UTIL_H #define _VSTRING_UTIL_H 1 #pragma GCC system_header #include #include #include // For less #include #include #include #include #include #include #include namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION template struct __vstring_utility { typedef typename _Alloc::template rebind<_CharT>::other _CharT_alloc_type; typedef _Traits traits_type; typedef typename _Traits::char_type value_type; typedef typename _CharT_alloc_type::size_type size_type; typedef typename _CharT_alloc_type::difference_type difference_type; typedef typename _CharT_alloc_type::pointer pointer; typedef typename _CharT_alloc_type::const_pointer const_pointer; // For __sso_string. typedef __gnu_cxx:: __normal_iterator > __sso_iterator; typedef __gnu_cxx:: __normal_iterator > __const_sso_iterator; // For __rc_string. typedef __gnu_cxx:: __normal_iterator > __rc_iterator; typedef __gnu_cxx:: __normal_iterator > __const_rc_iterator; // NB: When the allocator is empty, deriving from it saves space // (http://www.cantrip.org/emptyopt.html). template struct _Alloc_hider : public _Alloc1 { _Alloc_hider(_CharT* __ptr) : _Alloc1(), _M_p(__ptr) { } _Alloc_hider(const _Alloc1& __a, _CharT* __ptr) : _Alloc1(__a), _M_p(__ptr) { } _CharT* _M_p; // The actual data. }; // When __n = 1 way faster than the general multichar // traits_type::copy/move/assign. static void _S_copy(_CharT* __d, const _CharT* __s, size_type __n) { if (__n == 1) traits_type::assign(*__d, *__s); else traits_type::copy(__d, __s, __n); } static void _S_move(_CharT* __d, const _CharT* __s, size_type __n) { if (__n == 1) traits_type::assign(*__d, *__s); else traits_type::move(__d, __s, __n); } static void _S_assign(_CharT* __d, size_type __n, _CharT __c) { if (__n == 1) traits_type::assign(*__d, __c); else traits_type::assign(__d, __n, __c); } // _S_copy_chars is a separate template to permit specialization // to optimize for the common case of pointers as iterators. template static void _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2) { for (; __k1 != __k2; ++__k1, ++__p) traits_type::assign(*__p, *__k1); // These types are off. } static void _S_copy_chars(_CharT* __p, __sso_iterator __k1, __sso_iterator __k2) { _S_copy_chars(__p, __k1.base(), __k2.base()); } static void _S_copy_chars(_CharT* __p, __const_sso_iterator __k1, __const_sso_iterator __k2) { _S_copy_chars(__p, __k1.base(), __k2.base()); } static void _S_copy_chars(_CharT* __p, __rc_iterator __k1, __rc_iterator __k2) { _S_copy_chars(__p, __k1.base(), __k2.base()); } static void _S_copy_chars(_CharT* __p, __const_rc_iterator __k1, __const_rc_iterator __k2) { _S_copy_chars(__p, __k1.base(), __k2.base()); } static void _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2) { _S_copy(__p, __k1, __k2 - __k1); } static void _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2) { _S_copy(__p, __k1, __k2 - __k1); } static int _S_compare(size_type __n1, size_type __n2) { const difference_type __d = difference_type(__n1 - __n2); if (__d > __numeric_traits_integer::__max) return __numeric_traits_integer::__max; else if (__d < __numeric_traits_integer::__min) return __numeric_traits_integer::__min; else return int(__d); } }; _GLIBCXX_END_NAMESPACE_VERSION } // namespace #endif /* _VSTRING_UTIL_H */