release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/include/c++/4.5.3/ext/vstring_util.h

   1 // Versatile string utility -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006, 2007, 2008, 2009 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 3, 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 // 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.
  19
  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/>.
  24
  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.
  29  */
  30
  31 #ifndef _VSTRING_UTIL_H
  32 #define _VSTRING_UTIL_H 1
  33
  34 #pragma GCC system_header
  35
  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
  46 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
  47
  48   template<typename _CharT, typename _Traits, typename _Alloc>
  49     struct __vstring_utility
  50     {
  51       typedef typename _Alloc::template rebind<_CharT>::other _CharT_alloc_type;
  52
  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;
  59
  60       // For __sso_string.
  61       typedef __gnu_cxx::
  62       __normal_iterator<pointer, __gnu_cxx::
  63                         __versa_string<_CharT, _Traits, _Alloc,
  64                                        __sso_string_base> >
  65         __sso_iterator;
  66       typedef __gnu_cxx::
  67       __normal_iterator<const_pointer, __gnu_cxx::
  68                         __versa_string<_CharT, _Traits, _Alloc,
  69                                        __sso_string_base> >
  70         __const_sso_iterator;
  71
  72       // For __rc_string.
  73       typedef __gnu_cxx::
  74       __normal_iterator<pointer, __gnu_cxx::
  75                         __versa_string<_CharT, _Traits, _Alloc,
  76                                        __rc_string_base> >
  77         __rc_iterator;
  78       typedef __gnu_cxx::
  79       __normal_iterator<const_pointer, __gnu_cxx::
  80                         __versa_string<_CharT, _Traits, _Alloc,
  81                                        __rc_string_base> >
  82         __const_rc_iterator;
  83
  84       // NB:  When the allocator is empty, deriving from it saves space
  85       // (http://www.cantrip.org/emptyopt.html).
  86       template<typename _Alloc1>
  87         struct _Alloc_hider
  88         : public _Alloc1
  89         {
  90           _Alloc_hider(_CharT* __ptr)
  91           : _Alloc1(), _M_p(__ptr) { }
  92
  93           _Alloc_hider(const _Alloc1& __a, _CharT* __ptr)
  94           : _Alloc1(__a), _M_p(__ptr) { }
  95
  96           _CharT*  _M_p; // The actual data.
  97         };
  98
  99       // When __n = 1 way faster than the general multichar
 100       // traits_type::copy/move/assign.
 101       static void
 102       _S_copy(_CharT* __d, const _CharT* __s, size_type __n)
 103       {
 104         if (__n == 1)
 105           traits_type::assign(*__d, *__s);
 106         else
 107           traits_type::copy(__d, __s, __n);
 108       }
 109
 110       static void
 111       _S_move(_CharT* __d, const _CharT* __s, size_type __n)
 112       {
 113         if (__n == 1)
 114           traits_type::assign(*__d, *__s);
 115         else
 116           traits_type::move(__d, __s, __n);
 117       }
 118
 119       static void
 120       _S_assign(_CharT* __d, size_type __n, _CharT __c)
 121       {
 122         if (__n == 1)
 123           traits_type::assign(*__d, __c);
 124         else
 125           traits_type::assign(__d, __n, __c);
 126       }
 127
 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>
 131         static void
 132         _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
 133         {
 134           for (; __k1 != __k2; ++__k1, ++__p)
 135             traits_type::assign(*__p, *__k1); // These types are off.
 136         }
 137
 138       static void
 139       _S_copy_chars(_CharT* __p, __sso_iterator __k1, __sso_iterator __k2)
 140       { _S_copy_chars(__p, __k1.base(), __k2.base()); }
 141
 142       static void
 143       _S_copy_chars(_CharT* __p, __const_sso_iterator __k1,
 144                     __const_sso_iterator __k2)
 145       { _S_copy_chars(__p, __k1.base(), __k2.base()); }
 146
 147       static void
 148       _S_copy_chars(_CharT* __p, __rc_iterator __k1, __rc_iterator __k2)
 149       { _S_copy_chars(__p, __k1.base(), __k2.base()); }
 150
 151       static void
 152       _S_copy_chars(_CharT* __p, __const_rc_iterator __k1,
 153                     __const_rc_iterator __k2)
 154       { _S_copy_chars(__p, __k1.base(), __k2.base()); }
 155
 156       static void
 157       _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2)
 158       { _S_copy(__p, __k1, __k2 - __k1); }
 159
 160       static void
 161       _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
 162       { _S_copy(__p, __k1, __k2 - __k1); }
 163
 164       static int
 165       _S_compare(size_type __n1, size_type __n2)
 166       {
 167         const difference_type __d = difference_type(__n1 - __n2);
 168
 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;
 173         else
 174           return int(__d);
 175       }
 176     };
 177
 178 _GLIBCXX_END_NAMESPACE
 179
 180 #endif /* _VSTRING_UTIL_H */