reactos/sdk/include/c++/stlport/stl/debug/_string_sum_methods.h

   1 /*
   2  * Copyright (c) 2003
   3  * Francois Dumont
   4  *
   5  * This material is provided "as is", with absolutely no warranty expressed
   6  * or implied. Any use is at your own risk.
   7  *
   8  * Permission to use or copy this software for any purpose is hereby granted
   9  * without fee, provided the above notices are retained on all copies.
  10  * Permission to modify the code and to distribute modified code is granted,
  11  * provided the above notices are retained, and a notice that the code was
  12  * modified is included with the above copyright notice.
  13  *
  14  */
  15
  16 /*
  17  * All the necessary methods used for template expressions with basic_string
  18  * This file do not have to be macro guarded as it is only used in the _string.h
  19  * file and it is a part of the basic_string definition.
  20  */
  21
  22   template <class _Left, class _Right, class _StorageDir>
  23   basic_string(_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s)
  24     : _M_non_dbg_impl(_Reserve_t(), __s.size(), __s.get_allocator()),
  25       _M_iter_list(&_M_non_dbg_impl)
  26   { _M_append_sum(__s, _M_non_dbg_impl); }
  27
  28   template <class _Left, class _Right, class _StorageDir>
  29   basic_string(_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s,
  30                size_type __pos, size_type __n = npos,
  31                const allocator_type& __a = allocator_type())
  32     : _M_non_dbg_impl(_Reserve_t(), (__pos <= __s.size()) ? ((min) (__n, __s.size() - __pos)) : 0, __a),
  33       _M_iter_list(&_M_non_dbg_impl) {
  34     size_type __size = __s.size();
  35     if (__pos > __size)
  36       //This call will generate the necessary out of range exception:
  37       _M_non_dbg_impl.at(0);
  38     else
  39       _M_append_sum_pos(__s, __pos, (min) (__n, __size - __pos), _M_non_dbg_impl);
  40   }
  41
  42 private:
  43   _Base& _M_append_fast(_STLP_PRIV __char_wrapper<_CharT> __c, _Base &__str)
  44   { return __str += __c.getValue(); }
  45   _Base& _M_append_fast(_CharT const* __s, size_type __s_size, _Base &__str)
  46   { return __str.append(__s, __s_size); }
  47   _Base& _M_append_fast(_STLP_PRIV __cstr_wrapper<_CharT> const& __s, _Base &__str)
  48   { return _M_append_fast(__s.c_str(), __s.size(), __str); }
  49   _Base& _M_append_fast(_STLP_PRIV __bstr_wrapper<_CharT, _Traits, _Alloc> __s, _Base &__str)
  50   { return _M_append_fast(__s.b_str(), __str); }
  51   _Base& _M_append_fast(_Self const& __s, _Base &__str)
  52   { return _M_append_fast(__s.data(), __s.size(), __str); }
  53   _Base& _M_append_fast(_STLP_PRIV __sum_storage_elem<_CharT, _Traits, _Alloc> const&, _Base &__str)
  54   { return __str; }
  55   template <class _Left, class _Right, class _StorageDir>
  56   _Base& _M_append_fast(_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s, _Base &__str)
  57   { return _M_append_fast(__s.getRhs(), _M_append_fast(__s.getLhs(), __str)); }
  58
  59   _Base& _M_append_fast_pos(_STLP_PRIV __char_wrapper<_CharT> __c, _Base &__str, size_type /*__pos*/, size_type __n) {
  60     if (__n == 0)
  61       return __str;
  62     return __str += __c.getValue();
  63   }
  64   _Base& _M_append_fast_pos(_CharT const* __s, size_type __s_size, _Base &__str,
  65                             size_type __pos, size_type __n)
  66   { return __str.append(__s + __pos, __s + __pos + (min)(__n, __s_size - __pos)); }
  67   _Base& _M_append_fast_pos(_STLP_PRIV __cstr_wrapper<_CharT> const& __s, _Base &__str,
  68                             size_type __pos, size_type __n)
  69   { return _M_append_fast_pos(__s.c_str(), __s.size(), __str, __pos, __n); }
  70   _Base& _M_append_fast_pos(_STLP_PRIV __bstr_wrapper<_CharT, _Traits, _Alloc> __s, _Base &__str,
  71                             size_type __pos, size_type __n)
  72   { return _M_append_fast_pos(__s.b_str(), __str, __pos, __n); }
  73   _Base& _M_append_fast_pos(_Self const& __s, _Base &__str, size_type __pos, size_type __n)
  74   { return _M_append_fast_pos(__s.data(), __s.size(), __str, __pos, __n); }
  75   _Base& _M_append_fast_pos(_STLP_PRIV __sum_storage_elem<_CharT, _Traits, _Alloc> const&, _Base &__str,
  76                             size_type /*__pos*/, size_type /*__n*/)
  77   { return __str; }
  78
  79   template <class _Left, class _Right, class _StorageDir>
  80   _Base& _M_append_fast_pos(_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s,
  81                             _Base &__str, size_type __pos, size_type __n) {
  82     if (__n == 0) {
  83       return __str;
  84     }
  85     size_type __lhs_size = __s.getLhs().size();
  86     if (__pos < __lhs_size) {
  87       if (__n < (__lhs_size - __pos)) {
  88         return _M_append_fast_pos(__s.getLhs(), __str, __pos, __n);
  89       } else {
  90         return _M_append_fast_pos(__s.getRhs(), _M_append_fast_pos(__s.getLhs(), __str, __pos, __n),
  91                                   0, __n - (__lhs_size - __pos));
  92       }
  93     } else {
  94       return _M_append_fast_pos(__s.getRhs(), __str, __pos - __lhs_size, __n);
  95     }
  96   }
  97
  98   template <class _Left, class _Right, class _StorageDir>
  99   _Self& _M_append_sum (_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s,
 100                         _Base &__impl) {
 101     _M_append_fast(__s, __impl);
 102     return *this;
 103   }
 104
 105   template <class _Left, class _Right, class _StorageDir>
 106   _Self& _M_append_sum_pos (_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s,
 107                             size_type __pos, size_type __n, _Base &__impl) {
 108     _M_non_dbg_impl.reserve(_M_non_dbg_impl.size() + (min) (__s.size() - __pos, __n));
 109     _M_append_fast_pos(__s, __impl, __pos, __n);
 110     return *this;
 111   }