1 // Versatile string utility -*- C++ -*-
3 // Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
4 // Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
26 /** @file ext/vstring_util.h
27 * This is an internal header file, included by other library headers.
28 * Do not attempt to use it directly. @headername{ext/vstring.h}
31 #ifndef _VSTRING_UTIL_H
32 #define _VSTRING_UTIL_H 1
34 #pragma GCC system_header
36 #include <ext/vstring_fwd.h>
37 #include <debug/debug.h>
38 #include <bits/stl_function.h> // For less
39 #include <bits/functexcept.h>
40 #include <bits/localefwd.h>
41 #include <bits/ostream_insert.h>
42 #include <bits/stl_iterator.h>
43 #include <ext/numeric_traits.h>
44 #include <bits/move.h>
45 #include <bits/range_access.h>
47 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
49 _GLIBCXX_BEGIN_NAMESPACE_VERSION
51 template<typename _CharT, typename _Traits, typename _Alloc>
52 struct __vstring_utility
54 typedef typename _Alloc::template rebind<_CharT>::other _CharT_alloc_type;
56 typedef _Traits traits_type;
57 typedef typename _Traits::char_type value_type;
58 typedef typename _CharT_alloc_type::size_type size_type;
59 typedef typename _CharT_alloc_type::difference_type difference_type;
60 typedef typename _CharT_alloc_type::pointer pointer;
61 typedef typename _CharT_alloc_type::const_pointer const_pointer;
65 __normal_iterator<pointer, __gnu_cxx::
66 __versa_string<_CharT, _Traits, _Alloc,
70 __normal_iterator<const_pointer, __gnu_cxx::
71 __versa_string<_CharT, _Traits, _Alloc,
77 __normal_iterator<pointer, __gnu_cxx::
78 __versa_string<_CharT, _Traits, _Alloc,
82 __normal_iterator<const_pointer, __gnu_cxx::
83 __versa_string<_CharT, _Traits, _Alloc,
87 // NB: When the allocator is empty, deriving from it saves space
88 // (http://www.cantrip.org/emptyopt.html).
89 template<typename _Alloc1>
93 _Alloc_hider(_CharT* __ptr)
94 : _Alloc1(), _M_p(__ptr) { }
96 _Alloc_hider(const _Alloc1& __a, _CharT* __ptr)
97 : _Alloc1(__a), _M_p(__ptr) { }
99 _CharT* _M_p; // The actual data.
102 // When __n = 1 way faster than the general multichar
103 // traits_type::copy/move/assign.
105 _S_copy(_CharT* __d, const _CharT* __s, size_type __n)
108 traits_type::assign(*__d, *__s);
110 traits_type::copy(__d, __s, __n);
114 _S_move(_CharT* __d, const _CharT* __s, size_type __n)
117 traits_type::assign(*__d, *__s);
119 traits_type::move(__d, __s, __n);
123 _S_assign(_CharT* __d, size_type __n, _CharT __c)
126 traits_type::assign(*__d, __c);
128 traits_type::assign(__d, __n, __c);
131 // _S_copy_chars is a separate template to permit specialization
132 // to optimize for the common case of pointers as iterators.
133 template<typename _Iterator>
135 _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
137 for (; __k1 != __k2; ++__k1, ++__p)
138 traits_type::assign(*__p, *__k1); // These types are off.
142 _S_copy_chars(_CharT* __p, __sso_iterator __k1, __sso_iterator __k2)
143 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
146 _S_copy_chars(_CharT* __p, __const_sso_iterator __k1,
147 __const_sso_iterator __k2)
148 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
151 _S_copy_chars(_CharT* __p, __rc_iterator __k1, __rc_iterator __k2)
152 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
155 _S_copy_chars(_CharT* __p, __const_rc_iterator __k1,
156 __const_rc_iterator __k2)
157 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
160 _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2)
161 { _S_copy(__p, __k1, __k2 - __k1); }
164 _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
165 { _S_copy(__p, __k1, __k2 - __k1); }
168 _S_compare(size_type __n1, size_type __n2)
170 const difference_type __d = difference_type(__n1 - __n2);
172 if (__d > __numeric_traits_integer<int>::__max)
173 return __numeric_traits_integer<int>::__max;
174 else if (__d < __numeric_traits_integer<int>::__min)
175 return __numeric_traits_integer<int>::__min;
181 _GLIBCXX_END_NAMESPACE_VERSION
184 #endif /* _VSTRING_UTIL_H */