1 // Versatile string utility -*- C++ -*-
3 // Copyright (C) 2005, 2006, 2007 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 2, 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 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
30 /** @file ext/vstring_util.h
31 * This file is a GNU extension to the Standard C++ Library.
32 * This is an internal header file, included by other library headers.
33 * You should not attempt to use it directly.
36 #ifndef _VSTRING_UTIL_H
37 #define _VSTRING_UTIL_H 1
39 #pragma GCC system_header
41 #include <ext/vstring_fwd.h>
42 #include <debug/debug.h>
43 #include <bits/stl_function.h> // For less
44 #include <bits/functexcept.h>
45 #include <bits/localefwd.h>
46 #include <bits/ostream_insert.h>
47 #include <bits/stl_iterator.h>
48 #include <ext/numeric_traits.h>
49 #include <bits/stl_move.h>
51 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
53 template<typename _CharT, typename _Traits, typename _Alloc>
54 struct __vstring_utility
56 typedef typename _Alloc::template rebind<_CharT>::other _CharT_alloc_type;
58 typedef _Traits traits_type;
59 typedef typename _Traits::char_type value_type;
60 typedef typename _CharT_alloc_type::size_type size_type;
61 typedef typename _CharT_alloc_type::difference_type difference_type;
62 typedef typename _CharT_alloc_type::pointer pointer;
63 typedef typename _CharT_alloc_type::const_pointer const_pointer;
67 __normal_iterator<pointer, __gnu_cxx::
68 __versa_string<_CharT, _Traits, _Alloc,
72 __normal_iterator<const_pointer, __gnu_cxx::
73 __versa_string<_CharT, _Traits, _Alloc,
79 __normal_iterator<pointer, __gnu_cxx::
80 __versa_string<_CharT, _Traits, _Alloc,
84 __normal_iterator<const_pointer, __gnu_cxx::
85 __versa_string<_CharT, _Traits, _Alloc,
89 // NB: When the allocator is empty, deriving from it saves space
90 // (http://www.cantrip.org/emptyopt.html).
91 template<typename _Alloc1>
95 _Alloc_hider(_CharT* __ptr)
96 : _Alloc1(), _M_p(__ptr) { }
98 _Alloc_hider(const _Alloc1& __a, _CharT* __ptr)
99 : _Alloc1(__a), _M_p(__ptr) { }
101 _CharT* _M_p; // The actual data.
104 // When __n = 1 way faster than the general multichar
105 // traits_type::copy/move/assign.
107 _S_copy(_CharT* __d, const _CharT* __s, size_type __n)
110 traits_type::assign(*__d, *__s);
112 traits_type::copy(__d, __s, __n);
116 _S_move(_CharT* __d, const _CharT* __s, size_type __n)
119 traits_type::assign(*__d, *__s);
121 traits_type::move(__d, __s, __n);
125 _S_assign(_CharT* __d, size_type __n, _CharT __c)
128 traits_type::assign(*__d, __c);
130 traits_type::assign(__d, __n, __c);
133 // _S_copy_chars is a separate template to permit specialization
134 // to optimize for the common case of pointers as iterators.
135 template<typename _Iterator>
137 _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
139 for (; __k1 != __k2; ++__k1, ++__p)
140 traits_type::assign(*__p, *__k1); // These types are off.
144 _S_copy_chars(_CharT* __p, __sso_iterator __k1, __sso_iterator __k2)
145 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
148 _S_copy_chars(_CharT* __p, __const_sso_iterator __k1,
149 __const_sso_iterator __k2)
150 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
153 _S_copy_chars(_CharT* __p, __rc_iterator __k1, __rc_iterator __k2)
154 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
157 _S_copy_chars(_CharT* __p, __const_rc_iterator __k1,
158 __const_rc_iterator __k2)
159 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
162 _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2)
163 { _S_copy(__p, __k1, __k2 - __k1); }
166 _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
167 { _S_copy(__p, __k1, __k2 - __k1); }
170 _S_compare(size_type __n1, size_type __n2)
172 const difference_type __d = difference_type(__n1 - __n2);
174 if (__d > __numeric_traits_integer<int>::__max)
175 return __numeric_traits_integer<int>::__max;
176 else if (__d < __numeric_traits_integer<int>::__min)
177 return __numeric_traits_integer<int>::__min;
183 _GLIBCXX_END_NAMESPACE
185 #endif /* _VSTRING_UTIL_H */