diff options
Diffstat (limited to 'libstdc++/include/ext/vstring_util.h')
| -rw-r--r-- | libstdc++/include/ext/vstring_util.h | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/libstdc++/include/ext/vstring_util.h b/libstdc++/include/ext/vstring_util.h new file mode 100644 index 0000000..5ff3034 --- /dev/null +++ b/libstdc++/include/ext/vstring_util.h @@ -0,0 +1,177 @@ +// Versatile string utility -*- C++ -*- + +// Copyright (C) 2005, 2006, 2007 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 2, 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. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, +// USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +/** @file ext/vstring_util.h + * This file is a GNU extension to the Standard C++ Library. + * This is an internal header file, included by other library headers. + * You should not attempt to use it directly. + */ + +#ifndef _VSTRING_UTIL_H +#define _VSTRING_UTIL_H 1 + +#pragma GCC system_header + +#include <ext/vstring_fwd.h> +#include <debug/debug.h> +#include <bits/stl_function.h> // For less +#include <bits/functexcept.h> +#include <locale> +#include <algorithm> // For std::distance, srd::search. +#include <bits/ostream_insert.h> + +_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) + + template<typename _CharT, typename _Traits, typename _Alloc> + 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::pointer pointer; + typedef typename _CharT_alloc_type::const_pointer const_pointer; + + // For __sso_string. + typedef __gnu_cxx:: + __normal_iterator<pointer, __gnu_cxx:: + __versa_string<_CharT, _Traits, _Alloc, + __sso_string_base> > + __sso_iterator; + typedef __gnu_cxx:: + __normal_iterator<const_pointer, __gnu_cxx:: + __versa_string<_CharT, _Traits, _Alloc, + __sso_string_base> > + __const_sso_iterator; + + // For __rc_string. + typedef __gnu_cxx:: + __normal_iterator<pointer, __gnu_cxx:: + __versa_string<_CharT, _Traits, _Alloc, + __rc_string_base> > + __rc_iterator; + typedef __gnu_cxx:: + __normal_iterator<const_pointer, __gnu_cxx:: + __versa_string<_CharT, _Traits, _Alloc, + __rc_string_base> > + __const_rc_iterator; + + // NB: When the allocator is empty, deriving from it saves space + // (http://www.cantrip.org/emptyopt.html). + template<typename _Alloc1> + struct _Alloc_hider + : public _Alloc1 + { + _Alloc_hider(const _Alloc1& __a, _CharT* __ptr) + : _Alloc1(__a), _M_p(__ptr) { } + + _CharT* _M_p; // The actual data. + }; + + // For use in _M_construct (_S_construct) forward_iterator_tag. + template<typename _Type> + static bool + _S_is_null_pointer(_Type* __ptr) + { return __ptr == 0; } + + template<typename _Type> + static bool + _S_is_null_pointer(_Type) + { return false; } + + // 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<typename _Iterator> + 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); } + }; + +_GLIBCXX_END_NAMESPACE + +#endif /* _VSTRING_UTIL_H */ |
