1 // Versatile string utility -*- C++ -*-
3 // Copyright (C) 2005, 2006, 2007, 2008, 2009 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/vstring_util.h
26 * This file is a GNU extension to the Standard C++ Library.
27 * This is an internal header file, included by other library headers.
28 * You should not attempt to use it directly.
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>
46 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
48 template<typename _CharT, typename _Traits, typename _Alloc>
49 struct __vstring_utility
51 typedef typename _Alloc::template rebind<_CharT>::other _CharT_alloc_type;
53 typedef _Traits traits_type;
54 typedef typename _Traits::char_type value_type;
55 typedef typename _CharT_alloc_type::size_type size_type;
56 typedef typename _CharT_alloc_type::difference_type difference_type;
57 typedef typename _CharT_alloc_type::pointer pointer;
58 typedef typename _CharT_alloc_type::const_pointer const_pointer;
62 __normal_iterator<pointer, __gnu_cxx::
63 __versa_string<_CharT, _Traits, _Alloc,
67 __normal_iterator<const_pointer, __gnu_cxx::
68 __versa_string<_CharT, _Traits, _Alloc,
74 __normal_iterator<pointer, __gnu_cxx::
75 __versa_string<_CharT, _Traits, _Alloc,
79 __normal_iterator<const_pointer, __gnu_cxx::
80 __versa_string<_CharT, _Traits, _Alloc,
84 // NB: When the allocator is empty, deriving from it saves space
85 // (http://www.cantrip.org/emptyopt.html).
86 template<typename _Alloc1>
90 _Alloc_hider(_CharT* __ptr)
91 : _Alloc1(), _M_p(__ptr) { }
93 _Alloc_hider(const _Alloc1& __a, _CharT* __ptr)
94 : _Alloc1(__a), _M_p(__ptr) { }
96 _CharT* _M_p; // The actual data.
99 // When __n = 1 way faster than the general multichar
100 // traits_type::copy/move/assign.
102 _S_copy(_CharT* __d, const _CharT* __s, size_type __n)
105 traits_type::assign(*__d, *__s);
107 traits_type::copy(__d, __s, __n);
111 _S_move(_CharT* __d, const _CharT* __s, size_type __n)
114 traits_type::assign(*__d, *__s);
116 traits_type::move(__d, __s, __n);
120 _S_assign(_CharT* __d, size_type __n, _CharT __c)
123 traits_type::assign(*__d, __c);
125 traits_type::assign(__d, __n, __c);
128 // _S_copy_chars is a separate template to permit specialization
129 // to optimize for the common case of pointers as iterators.
130 template<typename _Iterator>
132 _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
134 for (; __k1 != __k2; ++__k1, ++__p)
135 traits_type::assign(*__p, *__k1); // These types are off.
139 _S_copy_chars(_CharT* __p, __sso_iterator __k1, __sso_iterator __k2)
140 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
143 _S_copy_chars(_CharT* __p, __const_sso_iterator __k1,
144 __const_sso_iterator __k2)
145 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
148 _S_copy_chars(_CharT* __p, __rc_iterator __k1, __rc_iterator __k2)
149 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
152 _S_copy_chars(_CharT* __p, __const_rc_iterator __k1,
153 __const_rc_iterator __k2)
154 { _S_copy_chars(__p, __k1.base(), __k2.base()); }
157 _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2)
158 { _S_copy(__p, __k1, __k2 - __k1); }
161 _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
162 { _S_copy(__p, __k1, __k2 - __k1); }
165 _S_compare(size_type __n1, size_type __n2)
167 const difference_type __d = difference_type(__n1 - __n2);
169 if (__d > __numeric_traits_integer<int>::__max)
170 return __numeric_traits_integer<int>::__max;
171 else if (__d < __numeric_traits_integer<int>::__min)
172 return __numeric_traits_integer<int>::__min;
178 _GLIBCXX_END_NAMESPACE
180 #endif /* _VSTRING_UTIL_H */