1 |
17 |
jlechner |
// Versatile string utility -*- C++ -*-
|
2 |
|
|
|
3 |
|
|
// Copyright (C) 2005, 2006 Free Software Foundation, Inc.
|
4 |
|
|
//
|
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)
|
9 |
|
|
// any later version.
|
10 |
|
|
|
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.
|
15 |
|
|
|
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,
|
19 |
|
|
// USA.
|
20 |
|
|
|
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.
|
29 |
|
|
|
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.
|
34 |
|
|
*/
|
35 |
|
|
|
36 |
|
|
#ifndef _VSTRING_UTIL_H
|
37 |
|
|
#define _VSTRING_UTIL_H 1
|
38 |
|
|
|
39 |
|
|
#pragma GCC system_header
|
40 |
|
|
|
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 <locale>
|
46 |
|
|
#include <algorithm> // For std::distance, srd::search.
|
47 |
|
|
|
48 |
|
|
namespace __gnu_cxx
|
49 |
|
|
{
|
50 |
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
51 |
|
|
struct __vstring_utility
|
52 |
|
|
{
|
53 |
|
|
typedef typename _Alloc::template rebind<_CharT>::other _CharT_alloc_type;
|
54 |
|
|
|
55 |
|
|
typedef _Traits traits_type;
|
56 |
|
|
typedef typename _Traits::char_type value_type;
|
57 |
|
|
typedef typename _CharT_alloc_type::size_type size_type;
|
58 |
|
|
typedef typename _CharT_alloc_type::pointer pointer;
|
59 |
|
|
typedef typename _CharT_alloc_type::const_pointer const_pointer;
|
60 |
|
|
|
61 |
|
|
// For __sso_string.
|
62 |
|
|
typedef __gnu_cxx::
|
63 |
|
|
__normal_iterator<pointer, __gnu_cxx::
|
64 |
|
|
__versa_string<_CharT, _Traits, _Alloc,
|
65 |
|
|
__sso_string_base> >
|
66 |
|
|
__sso_iterator;
|
67 |
|
|
typedef __gnu_cxx::
|
68 |
|
|
__normal_iterator<const_pointer, __gnu_cxx::
|
69 |
|
|
__versa_string<_CharT, _Traits, _Alloc,
|
70 |
|
|
__sso_string_base> >
|
71 |
|
|
__const_sso_iterator;
|
72 |
|
|
|
73 |
|
|
// For __rc_string.
|
74 |
|
|
typedef __gnu_cxx::
|
75 |
|
|
__normal_iterator<pointer, __gnu_cxx::
|
76 |
|
|
__versa_string<_CharT, _Traits, _Alloc,
|
77 |
|
|
__rc_string_base> >
|
78 |
|
|
__rc_iterator;
|
79 |
|
|
typedef __gnu_cxx::
|
80 |
|
|
__normal_iterator<const_pointer, __gnu_cxx::
|
81 |
|
|
__versa_string<_CharT, _Traits, _Alloc,
|
82 |
|
|
__rc_string_base> >
|
83 |
|
|
__const_rc_iterator;
|
84 |
|
|
|
85 |
|
|
// NB: When the allocator is empty, deriving from it saves space
|
86 |
|
|
// (http://www.cantrip.org/emptyopt.html).
|
87 |
|
|
template<typename _Alloc1>
|
88 |
|
|
struct _Alloc_hider
|
89 |
|
|
: public _Alloc1
|
90 |
|
|
{
|
91 |
|
|
_Alloc_hider(const _Alloc1& __a, _CharT* __ptr)
|
92 |
|
|
: _Alloc1(__a), _M_p(__ptr) { }
|
93 |
|
|
|
94 |
|
|
_CharT* _M_p; // The actual data.
|
95 |
|
|
};
|
96 |
|
|
|
97 |
|
|
// For use in _M_construct (_S_construct) forward_iterator_tag.
|
98 |
|
|
template<typename _Type>
|
99 |
|
|
static bool
|
100 |
|
|
_S_is_null_pointer(_Type* __ptr)
|
101 |
|
|
{ return __ptr == 0; }
|
102 |
|
|
|
103 |
|
|
template<typename _Type>
|
104 |
|
|
static bool
|
105 |
|
|
_S_is_null_pointer(_Type)
|
106 |
|
|
{ return false; }
|
107 |
|
|
|
108 |
|
|
// When __n = 1 way faster than the general multichar
|
109 |
|
|
// traits_type::copy/move/assign.
|
110 |
|
|
static void
|
111 |
|
|
_S_copy(_CharT* __d, const _CharT* __s, size_type __n)
|
112 |
|
|
{
|
113 |
|
|
if (__n == 1)
|
114 |
|
|
traits_type::assign(*__d, *__s);
|
115 |
|
|
else
|
116 |
|
|
traits_type::copy(__d, __s, __n);
|
117 |
|
|
}
|
118 |
|
|
|
119 |
|
|
static void
|
120 |
|
|
_S_move(_CharT* __d, const _CharT* __s, size_type __n)
|
121 |
|
|
{
|
122 |
|
|
if (__n == 1)
|
123 |
|
|
traits_type::assign(*__d, *__s);
|
124 |
|
|
else
|
125 |
|
|
traits_type::move(__d, __s, __n);
|
126 |
|
|
}
|
127 |
|
|
|
128 |
|
|
static void
|
129 |
|
|
_S_assign(_CharT* __d, size_type __n, _CharT __c)
|
130 |
|
|
{
|
131 |
|
|
if (__n == 1)
|
132 |
|
|
traits_type::assign(*__d, __c);
|
133 |
|
|
else
|
134 |
|
|
traits_type::assign(__d, __n, __c);
|
135 |
|
|
}
|
136 |
|
|
|
137 |
|
|
// _S_copy_chars is a separate template to permit specialization
|
138 |
|
|
// to optimize for the common case of pointers as iterators.
|
139 |
|
|
template<typename _Iterator>
|
140 |
|
|
static void
|
141 |
|
|
_S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
|
142 |
|
|
{
|
143 |
|
|
for (; __k1 != __k2; ++__k1, ++__p)
|
144 |
|
|
traits_type::assign(*__p, *__k1); // These types are off.
|
145 |
|
|
}
|
146 |
|
|
|
147 |
|
|
static void
|
148 |
|
|
_S_copy_chars(_CharT* __p, __sso_iterator __k1, __sso_iterator __k2)
|
149 |
|
|
{ _S_copy_chars(__p, __k1.base(), __k2.base()); }
|
150 |
|
|
|
151 |
|
|
static void
|
152 |
|
|
_S_copy_chars(_CharT* __p, __const_sso_iterator __k1,
|
153 |
|
|
__const_sso_iterator __k2)
|
154 |
|
|
{ _S_copy_chars(__p, __k1.base(), __k2.base()); }
|
155 |
|
|
|
156 |
|
|
static void
|
157 |
|
|
_S_copy_chars(_CharT* __p, __rc_iterator __k1, __rc_iterator __k2)
|
158 |
|
|
{ _S_copy_chars(__p, __k1.base(), __k2.base()); }
|
159 |
|
|
|
160 |
|
|
static void
|
161 |
|
|
_S_copy_chars(_CharT* __p, __const_rc_iterator __k1,
|
162 |
|
|
__const_rc_iterator __k2)
|
163 |
|
|
{ _S_copy_chars(__p, __k1.base(), __k2.base()); }
|
164 |
|
|
|
165 |
|
|
static void
|
166 |
|
|
_S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2)
|
167 |
|
|
{ _S_copy(__p, __k1, __k2 - __k1); }
|
168 |
|
|
|
169 |
|
|
static void
|
170 |
|
|
_S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
|
171 |
|
|
{ _S_copy(__p, __k1, __k2 - __k1); }
|
172 |
|
|
};
|
173 |
|
|
} // namespace __gnu_cxx
|
174 |
|
|
|
175 |
|
|
namespace std
|
176 |
|
|
{
|
177 |
|
|
// To implement Option 3 of DR 431 (vstring only in 4_1-branch).
|
178 |
|
|
template<typename _Alloc, bool = std::__is_empty<_Alloc>::__value>
|
179 |
|
|
struct __alloc_swap
|
180 |
|
|
{ static void _S_do_it(_Alloc&, _Alloc&) { } };
|
181 |
|
|
|
182 |
|
|
template<typename _Alloc>
|
183 |
|
|
struct __alloc_swap<_Alloc, false>
|
184 |
|
|
{
|
185 |
|
|
static void
|
186 |
|
|
_S_do_it(_Alloc& __one, _Alloc& __two)
|
187 |
|
|
{
|
188 |
|
|
// Precondition: swappable allocators.
|
189 |
|
|
if (__one != __two)
|
190 |
|
|
swap(__one, __two);
|
191 |
|
|
}
|
192 |
|
|
};
|
193 |
|
|
}
|
194 |
|
|
|
195 |
|
|
#endif /* _VSTRING_UTIL_H */
|