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112 lines
5.3 KiB
C++
112 lines
5.3 KiB
C++
/*
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* Copyright (c) 2003
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* Francois Dumont
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*
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* This material is provided "as is", with absolutely no warranty expressed
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* or implied. Any use is at your own risk.
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*
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* Permission to use or copy this software for any purpose is hereby granted
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* without fee, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*
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*/
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/*
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* All the necessary methods used for template expressions with basic_string
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* This file do not have to be macro guarded as it is only used in the _string.h
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* file and it is a part of the basic_string definition.
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*/
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template <class _Left, class _Right, class _StorageDir>
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basic_string(_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s)
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: _M_non_dbg_impl(_Reserve_t(), __s.size(), __s.get_allocator()),
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_M_iter_list(&_M_non_dbg_impl)
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{ _M_append_sum(__s, _M_non_dbg_impl); }
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template <class _Left, class _Right, class _StorageDir>
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basic_string(_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s,
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size_type __pos, size_type __n = npos,
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const allocator_type& __a = allocator_type())
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: _M_non_dbg_impl(_Reserve_t(), (__pos <= __s.size()) ? ((min) (__n, __s.size() - __pos)) : 0, __a),
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_M_iter_list(&_M_non_dbg_impl) {
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size_type __size = __s.size();
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if (__pos > __size)
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//This call will generate the necessary out of range exception:
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_M_non_dbg_impl.at(0);
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else
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_M_append_sum_pos(__s, __pos, (min) (__n, __size - __pos), _M_non_dbg_impl);
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}
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private:
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_Base& _M_append_fast(_STLP_PRIV __char_wrapper<_CharT> __c, _Base &__str)
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{ return __str += __c.getValue(); }
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_Base& _M_append_fast(_CharT const* __s, size_type __s_size, _Base &__str)
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{ return __str.append(__s, __s_size); }
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_Base& _M_append_fast(_STLP_PRIV __cstr_wrapper<_CharT> const& __s, _Base &__str)
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{ return _M_append_fast(__s.c_str(), __s.size(), __str); }
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_Base& _M_append_fast(_STLP_PRIV __bstr_wrapper<_CharT, _Traits, _Alloc> __s, _Base &__str)
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{ return _M_append_fast(__s.b_str(), __str); }
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_Base& _M_append_fast(_Self const& __s, _Base &__str)
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{ return _M_append_fast(__s.data(), __s.size(), __str); }
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_Base& _M_append_fast(_STLP_PRIV __sum_storage_elem<_CharT, _Traits, _Alloc> const&, _Base &__str)
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{ return __str; }
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template <class _Left, class _Right, class _StorageDir>
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_Base& _M_append_fast(_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s, _Base &__str)
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{ return _M_append_fast(__s.getRhs(), _M_append_fast(__s.getLhs(), __str)); }
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_Base& _M_append_fast_pos(_STLP_PRIV __char_wrapper<_CharT> __c, _Base &__str, size_type /*__pos*/, size_type __n) {
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if (__n == 0)
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return __str;
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return __str += __c.getValue();
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}
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_Base& _M_append_fast_pos(_CharT const* __s, size_type __s_size, _Base &__str,
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size_type __pos, size_type __n)
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{ return __str.append(__s + __pos, __s + __pos + (min)(__n, __s_size - __pos)); }
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_Base& _M_append_fast_pos(_STLP_PRIV __cstr_wrapper<_CharT> const& __s, _Base &__str,
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size_type __pos, size_type __n)
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{ return _M_append_fast_pos(__s.c_str(), __s.size(), __str, __pos, __n); }
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_Base& _M_append_fast_pos(_STLP_PRIV __bstr_wrapper<_CharT, _Traits, _Alloc> __s, _Base &__str,
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size_type __pos, size_type __n)
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{ return _M_append_fast_pos(__s.b_str(), __str, __pos, __n); }
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_Base& _M_append_fast_pos(_Self const& __s, _Base &__str, size_type __pos, size_type __n)
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{ return _M_append_fast_pos(__s.data(), __s.size(), __str, __pos, __n); }
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_Base& _M_append_fast_pos(_STLP_PRIV __sum_storage_elem<_CharT, _Traits, _Alloc> const&, _Base &__str,
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size_type /*__pos*/, size_type /*__n*/)
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{ return __str; }
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template <class _Left, class _Right, class _StorageDir>
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_Base& _M_append_fast_pos(_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s,
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_Base &__str, size_type __pos, size_type __n) {
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if (__n == 0) {
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return __str;
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}
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size_type __lhs_size = __s.getLhs().size();
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if (__pos < __lhs_size) {
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if (__n < (__lhs_size - __pos)) {
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return _M_append_fast_pos(__s.getLhs(), __str, __pos, __n);
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} else {
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return _M_append_fast_pos(__s.getRhs(), _M_append_fast_pos(__s.getLhs(), __str, __pos, __n),
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0, __n - (__lhs_size - __pos));
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}
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} else {
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return _M_append_fast_pos(__s.getRhs(), __str, __pos - __lhs_size, __n);
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}
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}
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template <class _Left, class _Right, class _StorageDir>
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_Self& _M_append_sum (_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s,
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_Base &__impl) {
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_M_append_fast(__s, __impl);
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return *this;
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}
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template <class _Left, class _Right, class _StorageDir>
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_Self& _M_append_sum_pos (_STLP_PRIV __bstr_sum<_CharT, _Traits, _Alloc, _Left, _Right, _StorageDir> const& __s,
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size_type __pos, size_type __n, _Base &__impl) {
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_M_non_dbg_impl.reserve(_M_non_dbg_impl.size() + (min) (__s.size() - __pos, __n));
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_M_append_fast_pos(__s, __impl, __pos, __n);
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return *this;
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}
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