xref: /openbsd-src/gnu/gcc/libstdc++-v3/include/ext/vstring_util.h (revision 404b540a9034ac75a6199ad1a32d1bbc7a0d4210)
1*404b540aSrobert // Versatile string utility -*- C++ -*-
2*404b540aSrobert 
3*404b540aSrobert // Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
4*404b540aSrobert //
5*404b540aSrobert // This file is part of the GNU ISO C++ Library.  This library is free
6*404b540aSrobert // software; you can redistribute it and/or modify it under the
7*404b540aSrobert // terms of the GNU General Public License as published by the
8*404b540aSrobert // Free Software Foundation; either version 2, or (at your option)
9*404b540aSrobert // any later version.
10*404b540aSrobert 
11*404b540aSrobert // This library is distributed in the hope that it will be useful,
12*404b540aSrobert // but WITHOUT ANY WARRANTY; without even the implied warranty of
13*404b540aSrobert // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14*404b540aSrobert // GNU General Public License for more details.
15*404b540aSrobert 
16*404b540aSrobert // You should have received a copy of the GNU General Public License along
17*404b540aSrobert // with this library; see the file COPYING.  If not, write to the Free
18*404b540aSrobert // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19*404b540aSrobert // USA.
20*404b540aSrobert 
21*404b540aSrobert // As a special exception, you may use this file as part of a free software
22*404b540aSrobert // library without restriction.  Specifically, if other files instantiate
23*404b540aSrobert // templates or use macros or inline functions from this file, or you compile
24*404b540aSrobert // this file and link it with other files to produce an executable, this
25*404b540aSrobert // file does not by itself cause the resulting executable to be covered by
26*404b540aSrobert // the GNU General Public License.  This exception does not however
27*404b540aSrobert // invalidate any other reasons why the executable file might be covered by
28*404b540aSrobert // the GNU General Public License.
29*404b540aSrobert 
30*404b540aSrobert /** @file ext/vstring_util.h
31*404b540aSrobert  *  This file is a GNU extension to the Standard C++ Library.
32*404b540aSrobert  *  This is an internal header file, included by other library headers.
33*404b540aSrobert  *  You should not attempt to use it directly.
34*404b540aSrobert  */
35*404b540aSrobert 
36*404b540aSrobert #ifndef _VSTRING_UTIL_H
37*404b540aSrobert #define _VSTRING_UTIL_H 1
38*404b540aSrobert 
39*404b540aSrobert #pragma GCC system_header
40*404b540aSrobert 
41*404b540aSrobert #include <ext/vstring_fwd.h>
42*404b540aSrobert #include <debug/debug.h>
43*404b540aSrobert #include <bits/stl_function.h>  // For less
44*404b540aSrobert #include <bits/functexcept.h>
45*404b540aSrobert #include <locale>
46*404b540aSrobert #include <algorithm> // For std::distance, srd::search.
47*404b540aSrobert #include <bits/ostream_insert.h>
48*404b540aSrobert 
49*404b540aSrobert _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
50*404b540aSrobert 
51*404b540aSrobert   template<typename _CharT, typename _Traits, typename _Alloc>
52*404b540aSrobert     struct __vstring_utility
53*404b540aSrobert     {
54*404b540aSrobert       typedef typename _Alloc::template rebind<_CharT>::other _CharT_alloc_type;
55*404b540aSrobert 
56*404b540aSrobert       typedef _Traits					    traits_type;
57*404b540aSrobert       typedef typename _Traits::char_type		    value_type;
58*404b540aSrobert       typedef typename _CharT_alloc_type::size_type	    size_type;
59*404b540aSrobert       typedef typename _CharT_alloc_type::pointer	    pointer;
60*404b540aSrobert       typedef typename _CharT_alloc_type::const_pointer	    const_pointer;
61*404b540aSrobert 
62*404b540aSrobert       // For __sso_string.
63*404b540aSrobert       typedef __gnu_cxx::
64*404b540aSrobert       __normal_iterator<pointer, __gnu_cxx::
65*404b540aSrobert 			__versa_string<_CharT, _Traits, _Alloc,
66*404b540aSrobert 				       __sso_string_base> >
67*404b540aSrobert         __sso_iterator;
68*404b540aSrobert       typedef __gnu_cxx::
69*404b540aSrobert       __normal_iterator<const_pointer, __gnu_cxx::
70*404b540aSrobert 			__versa_string<_CharT, _Traits, _Alloc,
71*404b540aSrobert 				       __sso_string_base> >
72*404b540aSrobert         __const_sso_iterator;
73*404b540aSrobert 
74*404b540aSrobert       // For __rc_string.
75*404b540aSrobert       typedef __gnu_cxx::
76*404b540aSrobert       __normal_iterator<pointer, __gnu_cxx::
77*404b540aSrobert 			__versa_string<_CharT, _Traits, _Alloc,
78*404b540aSrobert 				       __rc_string_base> >
79*404b540aSrobert         __rc_iterator;
80*404b540aSrobert       typedef __gnu_cxx::
81*404b540aSrobert       __normal_iterator<const_pointer, __gnu_cxx::
82*404b540aSrobert 			__versa_string<_CharT, _Traits, _Alloc,
83*404b540aSrobert 				       __rc_string_base> >
84*404b540aSrobert         __const_rc_iterator;
85*404b540aSrobert 
86*404b540aSrobert       // NB:  When the allocator is empty, deriving from it saves space
87*404b540aSrobert       // (http://www.cantrip.org/emptyopt.html).
88*404b540aSrobert       template<typename _Alloc1>
89*404b540aSrobert         struct _Alloc_hider
90*404b540aSrobert 	: public _Alloc1
91*404b540aSrobert 	{
_Alloc_hider__vstring_utility::_Alloc_hider92*404b540aSrobert 	  _Alloc_hider(const _Alloc1& __a, _CharT* __ptr)
93*404b540aSrobert 	  : _Alloc1(__a), _M_p(__ptr) { }
94*404b540aSrobert 
95*404b540aSrobert 	  _CharT*  _M_p; // The actual data.
96*404b540aSrobert 	};
97*404b540aSrobert 
98*404b540aSrobert       // For use in _M_construct (_S_construct) forward_iterator_tag.
99*404b540aSrobert       template<typename _Type>
100*404b540aSrobert         static bool
_S_is_null_pointer__vstring_utility101*404b540aSrobert         _S_is_null_pointer(_Type* __ptr)
102*404b540aSrobert         { return __ptr == 0; }
103*404b540aSrobert 
104*404b540aSrobert       template<typename _Type>
105*404b540aSrobert         static bool
_S_is_null_pointer__vstring_utility106*404b540aSrobert         _S_is_null_pointer(_Type)
107*404b540aSrobert         { return false; }
108*404b540aSrobert 
109*404b540aSrobert       // When __n = 1 way faster than the general multichar
110*404b540aSrobert       // traits_type::copy/move/assign.
111*404b540aSrobert       static void
_S_copy__vstring_utility112*404b540aSrobert       _S_copy(_CharT* __d, const _CharT* __s, size_type __n)
113*404b540aSrobert       {
114*404b540aSrobert 	if (__n == 1)
115*404b540aSrobert 	  traits_type::assign(*__d, *__s);
116*404b540aSrobert 	else
117*404b540aSrobert 	  traits_type::copy(__d, __s, __n);
118*404b540aSrobert       }
119*404b540aSrobert 
120*404b540aSrobert       static void
_S_move__vstring_utility121*404b540aSrobert       _S_move(_CharT* __d, const _CharT* __s, size_type __n)
122*404b540aSrobert       {
123*404b540aSrobert 	if (__n == 1)
124*404b540aSrobert 	  traits_type::assign(*__d, *__s);
125*404b540aSrobert 	else
126*404b540aSrobert 	  traits_type::move(__d, __s, __n);
127*404b540aSrobert       }
128*404b540aSrobert 
129*404b540aSrobert       static void
_S_assign__vstring_utility130*404b540aSrobert       _S_assign(_CharT* __d, size_type __n, _CharT __c)
131*404b540aSrobert       {
132*404b540aSrobert 	if (__n == 1)
133*404b540aSrobert 	  traits_type::assign(*__d, __c);
134*404b540aSrobert 	else
135*404b540aSrobert 	  traits_type::assign(__d, __n, __c);
136*404b540aSrobert       }
137*404b540aSrobert 
138*404b540aSrobert       // _S_copy_chars is a separate template to permit specialization
139*404b540aSrobert       // to optimize for the common case of pointers as iterators.
140*404b540aSrobert       template<typename _Iterator>
141*404b540aSrobert         static void
_S_copy_chars__vstring_utility142*404b540aSrobert         _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
143*404b540aSrobert         {
144*404b540aSrobert 	  for (; __k1 != __k2; ++__k1, ++__p)
145*404b540aSrobert 	    traits_type::assign(*__p, *__k1); // These types are off.
146*404b540aSrobert 	}
147*404b540aSrobert 
148*404b540aSrobert       static void
_S_copy_chars__vstring_utility149*404b540aSrobert       _S_copy_chars(_CharT* __p, __sso_iterator __k1, __sso_iterator __k2)
150*404b540aSrobert       { _S_copy_chars(__p, __k1.base(), __k2.base()); }
151*404b540aSrobert 
152*404b540aSrobert       static void
_S_copy_chars__vstring_utility153*404b540aSrobert       _S_copy_chars(_CharT* __p, __const_sso_iterator __k1,
154*404b540aSrobert 		    __const_sso_iterator __k2)
155*404b540aSrobert       { _S_copy_chars(__p, __k1.base(), __k2.base()); }
156*404b540aSrobert 
157*404b540aSrobert       static void
_S_copy_chars__vstring_utility158*404b540aSrobert       _S_copy_chars(_CharT* __p, __rc_iterator __k1, __rc_iterator __k2)
159*404b540aSrobert       { _S_copy_chars(__p, __k1.base(), __k2.base()); }
160*404b540aSrobert 
161*404b540aSrobert       static void
_S_copy_chars__vstring_utility162*404b540aSrobert       _S_copy_chars(_CharT* __p, __const_rc_iterator __k1,
163*404b540aSrobert 		    __const_rc_iterator __k2)
164*404b540aSrobert       { _S_copy_chars(__p, __k1.base(), __k2.base()); }
165*404b540aSrobert 
166*404b540aSrobert       static void
_S_copy_chars__vstring_utility167*404b540aSrobert       _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2)
168*404b540aSrobert       { _S_copy(__p, __k1, __k2 - __k1); }
169*404b540aSrobert 
170*404b540aSrobert       static void
_S_copy_chars__vstring_utility171*404b540aSrobert       _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
172*404b540aSrobert       { _S_copy(__p, __k1, __k2 - __k1); }
173*404b540aSrobert     };
174*404b540aSrobert 
175*404b540aSrobert _GLIBCXX_END_NAMESPACE
176*404b540aSrobert 
177*404b540aSrobert #endif /* _VSTRING_UTIL_H */
178