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524 lines
16 KiB
524 lines
16 KiB
// sstream standard header
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#pragma once
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#ifndef _SSTREAM_
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#define _SSTREAM_
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#include <string>
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#pragma pack(push,8)
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#pragma warning(push,3)
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#pragma warning(disable: 4251)
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_STD_BEGIN
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// TEMPLATE CLASS basic_stringbuf
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template<class _Elem,
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class _Traits,
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class _Alloc>
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class basic_stringbuf
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: public basic_streambuf<_Elem, _Traits>
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{ // stream buffer maintaining an allocated character array
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public:
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typedef _Alloc allocator_type;
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typedef basic_streambuf<_Elem, _Traits> _Mysb;
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typedef basic_string<_Elem, _Traits, _Alloc> _Mystr;
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explicit basic_stringbuf(ios_base::openmode _Mode =
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ios_base::in | ios_base::out)
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{ // construct empty character buffer from mode
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_Init(0, 0, _Getstate(_Mode));
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}
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explicit basic_stringbuf(const _Mystr& _Str,
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ios_base::openmode _Mode = ios_base::in | ios_base::out)
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{ // construct character buffer from string, mode
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_Init(_Str.c_str(), _Str.size(), _Getstate(_Mode));
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}
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virtual ~basic_stringbuf()
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{ // destroy the object
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_Tidy();
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}
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enum
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{ // constants for bits in stream state
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_Allocated = 1, // set if character array storage has been allocated
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_Constant = 2, // set if character array nonmutable
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_Noread = 4}; // set if character array cannot be read
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typedef int _Strstate;
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typedef typename _Traits::int_type int_type;
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typedef typename _Traits::pos_type pos_type;
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typedef typename _Traits::off_type off_type;
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_Mystr str() const
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{ // return string copy of character array
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if (!(_Mystate & _Constant) && _Mysb::pptr() != 0)
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{ // writable, make string from write buffer
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_Mystr _Str(_Mysb::pbase(), (_Seekhigh < _Mysb::pptr()
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? _Mysb::pptr() : _Seekhigh) - _Mysb::pbase());
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return (_Str);
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}
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else if (!(_Mystate & _Noread) && _Mysb::gptr() != 0)
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{ // readable, make string from read buffer
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_Mystr _Str(_Mysb::eback(), _Mysb::egptr() - _Mysb::eback());
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return (_Str);
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}
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else
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{ // inaccessible, return empty string
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_Mystr _Nul;
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return (_Nul);
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}
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}
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void str(const _Mystr& _Newstr)
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{ // replace character array from string
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_Tidy();
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_Init(_Newstr.c_str(), _Newstr.size(), _Mystate);
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}
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protected:
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virtual int_type overflow(int_type _Meta = _Traits::eof())
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{ // put an element to stream
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if (_Traits::eq_int_type(_Traits::eof(), _Meta))
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return (_Traits::not_eof(_Meta)); // EOF, return success code
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else if (_Mysb::pptr() != 0
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&& _Mysb::pptr() < _Mysb::epptr())
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{ // room in buffer, store it
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*_Mysb::_Pninc() = _Traits::to_char_type(_Meta);
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return (_Meta);
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}
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else if (_Mystate & _Constant)
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return (_Traits::eof()); // array nonmutable, fail
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else
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{ // grow buffer and store element
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size_t _Oldsize = _Mysb::pptr() == 0
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? 0 : _Mysb::epptr() - _Mysb::eback();
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size_t _Newsize = _Oldsize;
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size_t _Inc = _Newsize / 2 < _MINSIZE
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? _MINSIZE : _Newsize / 2; // grow by 50 per cent
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_Elem *_Ptr = 0;
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while (0 < _Inc && INT_MAX - _Inc < _Newsize)
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_Inc /= 2; // increment causes overflow, halve it
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if (0 < _Inc)
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{ // finite increment, allocate new character array
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_Newsize += _Inc;
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_Ptr = _Al.allocate(_Newsize, (void *)0);
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}
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if (0 < _Oldsize)
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_Traits::copy(_Ptr, _Mysb::eback(), _Oldsize);
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if (_Mystate & _Allocated)
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_Al.deallocate(_Mysb::eback(), _Oldsize);
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_Mystate |= _Allocated;
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if (_Oldsize == 0)
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{ // first growth, set up pointers
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_Seekhigh = _Ptr;
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_Mysb::setp(_Ptr, _Ptr + _Newsize);
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if (_Mystate & _Noread)
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_Mysb::setg(_Ptr, 0, _Ptr);
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else
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_Mysb::setg(_Ptr, _Ptr, _Ptr + 1);
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}
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else
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{ // not first growth, adjust pointers
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_Seekhigh = _Seekhigh - _Mysb::eback() + _Ptr;
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_Mysb::setp(_Mysb::pbase() - _Mysb::eback() + _Ptr,
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_Mysb::pptr() - _Mysb::eback() + _Ptr, _Ptr + _Newsize);
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if (_Mystate & _Noread)
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_Mysb::setg(_Ptr, 0, _Ptr);
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else
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_Mysb::setg(_Ptr,
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_Mysb::gptr() - _Mysb::eback() + _Ptr,
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_Mysb::pptr() + 1);
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}
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*_Mysb::_Pninc() = _Traits::to_char_type(_Meta);
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return (_Meta);
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}
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}
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virtual int_type pbackfail(int_type _Meta = _Traits::eof())
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{ // put an element back to stream
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if (_Mysb::gptr() == 0
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|| _Mysb::gptr() <= _Mysb::eback()
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|| !_Traits::eq_int_type(_Traits::eof(), _Meta)
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&& !_Traits::eq(_Traits::to_char_type(_Meta), _Mysb::gptr()[-1])
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&& _Mystate & _Constant)
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return (_Traits::eof()); // can't put back, fail
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else
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{ // back up one position and store put-back character
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_Mysb::gbump(-1);
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if (!_Traits::eq_int_type(_Traits::eof(), _Meta))
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*_Mysb::gptr() = _Traits::to_char_type(_Meta);
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return (_Traits::not_eof(_Meta));
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}
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}
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virtual int_type underflow()
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{ // get an element from stream, but don't point past it
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if (_Mysb::gptr() == 0)
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return (_Traits::eof()); // no character buffer, fail
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else if (_Mysb::gptr() < _Mysb::egptr())
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return (_Traits::to_int_type(*_Mysb::gptr())); // return buffered
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else if (_Mystate & _Noread || _Mysb::pptr() == 0
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|| _Mysb::pptr() <= _Mysb::gptr() && _Seekhigh <= _Mysb::gptr())
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return (_Traits::eof()); // can't read, fail
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else
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{ // extend read buffer into written area, then return buffered
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if (_Seekhigh < _Mysb::pptr())
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_Seekhigh = _Mysb::pptr();
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_Mysb::setg(_Mysb::eback(), _Mysb::gptr(), _Seekhigh);
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return (_Traits::to_int_type(*_Mysb::gptr()));
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}
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}
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virtual pos_type seekoff(off_type _Off, ios_base::seekdir _Way,
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ios_base::openmode _Which = ios_base::in | ios_base::out)
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{ // change position by _Off, according to _Way, _Mode
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if (_Mysb::pptr() != 0 && _Seekhigh < _Mysb::pptr())
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_Seekhigh = _Mysb::pptr(); // update high-water pointer
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if (_Which & ios_base::in && _Mysb::gptr() != 0)
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{ // position within read buffer
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if (_Way == ios_base::end)
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_Off += off_type(_Seekhigh - _Mysb::eback());
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else if (_Way == ios_base::cur
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&& (_Which & ios_base::out) == 0)
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_Off += off_type(_Mysb::gptr() - _Mysb::eback());
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else if (_Way != ios_base::beg)
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_Off = _BADOFF;
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if (0 <= _Off && _Off <= _Seekhigh - _Mysb::eback())
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{ // change read position
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_Mysb::gbump((int)(_Mysb::eback() - _Mysb::gptr() + _Off));
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if (_Which & ios_base::out && _Mysb::pptr() != 0)
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_Mysb::setp(_Mysb::pbase(), _Mysb::gptr(),
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_Mysb::epptr()); // change write position to match
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}
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else
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_Off = _BADOFF;
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}
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else if (_Which & ios_base::out && _Mysb::pptr() != 0)
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{ // position within write buffer
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if (_Way == ios_base::end)
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_Off += off_type(_Seekhigh - _Mysb::eback());
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else if (_Way == ios_base::cur)
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_Off += off_type(_Mysb::pptr() - _Mysb::eback());
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else if (_Way != ios_base::beg)
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_Off = _BADOFF;
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if (0 <= _Off && _Off <= _Seekhigh - _Mysb::eback())
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_Mysb::pbump((int)(_Mysb::eback()
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- _Mysb::pptr() + _Off)); // change write position
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else
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_Off = _BADOFF;
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}
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else
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_Off = _BADOFF; // neither read nor write buffer selected, fail
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return (pos_type(_Off));
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}
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virtual pos_type seekpos(pos_type _Ptr,
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ios_base::openmode _Mode = ios_base::in | ios_base::out)
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{ // change position to _Pos, according to _Mode
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streamoff _Off = (streamoff)_Ptr;
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if (_Mysb::pptr() != 0 && _Seekhigh < _Mysb::pptr())
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_Seekhigh = _Mysb::pptr(); // update high-water pointer
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if (_Off == _BADOFF)
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;
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else if (_Mode & ios_base::in && _Mysb::gptr() != 0)
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{ // position within read buffer
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if (0 <= _Off && _Off <= _Seekhigh - _Mysb::eback())
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{ // change read position
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_Mysb::gbump((int)(_Mysb::eback() - _Mysb::gptr() + _Off));
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if (_Mode & ios_base::out && _Mysb::pptr() != 0)
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_Mysb::setp(_Mysb::pbase(), _Mysb::gptr(),
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_Mysb::epptr()); // change write position to match
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}
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else
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_Off = _BADOFF;
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}
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else if (_Mode & ios_base::out && _Mysb::pptr() != 0)
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{ // position within write buffer
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if (0 <= _Off && _Off <= _Seekhigh - _Mysb::eback())
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_Mysb::pbump((int)(_Mysb::eback()
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- _Mysb::pptr() + _Off)); // change write position
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else
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_Off = _BADOFF;
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}
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else
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_Off = _BADOFF;
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return (streampos(_Off));
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}
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void _Init(const _Elem *_Ptr, size_t _Count, _Strstate _State)
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{ // initialize buffer to [_Ptr, _Ptr + _Count), set state
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_Seekhigh = 0;
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_Mystate = _State;
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if (_Count != 0
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&& (_Mystate & (_Noread | _Constant)) != (_Noread | _Constant))
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{ // finite buffer that can be read or written, set it up
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_Elem *_Pnew = _Al.allocate(_Count, (void *)0);
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_Traits::copy(_Pnew, _Ptr, _Count);
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_Seekhigh = _Pnew + _Count;
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if (!(_Mystate & _Noread))
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_Mysb::setg(_Pnew, _Pnew,
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_Pnew + _Count); // setup read buffer
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if (!(_Mystate & _Constant))
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{ // setup write buffer, and maybe read buffer
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_Mysb::setp(_Pnew, _Pnew + _Count);
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if (_Mysb::gptr() == 0)
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_Mysb::setg(_Pnew, 0, _Pnew);
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}
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_Mystate |= _Allocated;
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}
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}
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void _Tidy()
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{ // discard any allocated buffer and clear pointers
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if (_Mystate & _Allocated)
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_Al.deallocate(_Mysb::eback(),
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(_Mysb::pptr() != 0 ? _Mysb::epptr()
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: _Mysb::egptr()) - _Mysb::eback());
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_Mysb::setg(0, 0, 0);
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_Mysb::setp(0, 0);
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_Seekhigh = 0;
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_Mystate &= ~_Allocated;
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}
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private:
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enum
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{ // constant for minimum buffer size
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_MINSIZE = 32};
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_Strstate _Getstate(ios_base::openmode _Mode)
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{ // convert open mode to stream state bits
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_Strstate _State = (_Strstate)0;
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if (!(_Mode & ios_base::in))
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_State |= _Noread;
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if (!(_Mode & ios_base::out))
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_State |= _Constant;
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return (_State);
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}
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_Elem *_Seekhigh; // the high-water pointer in character array
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_Strstate _Mystate; // the stream state
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allocator_type _Al; // the allocator object
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};
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#ifdef _DLL_CPPLIB
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#ifdef __FORCE_INSTANCE
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template class _CRTIMP2 basic_stringbuf<char,
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char_traits<char>, allocator<char> >;
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template class _CRTIMP2 basic_stringbuf<wchar_t,
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char_traits<wchar_t>, allocator<wchar_t> >;
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#ifdef _CRTBLD_NATIVE_WCHAR_T
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template class _CRTIMP2 basic_stringbuf<unsigned short,
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char_traits<unsigned short>, allocator<unsigned short> >;
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#endif
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#endif // __FORCE_INSTANCE
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#endif // _DLL_CPPLIB
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// TEMPLATE CLASS basic_istringstream
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template<class _Elem,
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class _Traits,
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class _Alloc>
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class basic_istringstream
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: public basic_istream<_Elem, _Traits>
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{ // input stream associated with a character array
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public:
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typedef _Alloc allocator_type;
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typedef basic_stringbuf<_Elem, _Traits, _Alloc> _Mysb;
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typedef basic_string<_Elem, _Traits, _Alloc> _Mystr;
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explicit basic_istringstream(ios_base::openmode _Mode = ios_base::in)
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: basic_istream<_Elem, _Traits>(&_Stringbuffer),
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_Stringbuffer(_Mode | ios_base::in)
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{ // construct empty readable character buffer
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}
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explicit basic_istringstream(const _Mystr& _Str,
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ios_base::openmode _Mode = ios_base::in)
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: basic_istream<_Elem, _Traits>(&_Stringbuffer),
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_Stringbuffer(_Str, _Mode | ios_base::in)
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{ // construct readable character buffer from NTCS
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}
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virtual ~basic_istringstream()
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{ // destroy the object
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}
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_Mysb *rdbuf() const
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{ // return pointer to file buffer
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return ((_Mysb *)&_Stringbuffer);
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}
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_Mystr str() const
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{ // return string copy of character array
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return (_Stringbuffer.str());
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}
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void str(const _Mystr& _Newstr)
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{ // replace character array from string
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_Stringbuffer.str(_Newstr);
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}
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private:
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_Mysb _Stringbuffer; // the string buffer
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};
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#ifdef _DLL_CPPLIB
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#ifdef __FORCE_INSTANCE
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template class _CRTIMP2 basic_istringstream<char,
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char_traits<char>, allocator<char> >;
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template class _CRTIMP2 basic_istringstream<wchar_t,
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char_traits<wchar_t>, allocator<wchar_t> >;
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#ifdef _CRTBLD_NATIVE_WCHAR_T
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template class _CRTIMP2 basic_istringstream<unsigned short,
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char_traits<unsigned short>, allocator<unsigned short> >;
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#endif
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#endif // __FORCE_INSTANCE
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#endif // _DLL_CPPLIB
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// TEMPLATE CLASS basic_ostringstream
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template<class _Elem,
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class _Traits,
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class _Alloc>
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class basic_ostringstream
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: public basic_ostream<_Elem, _Traits>
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{ // output stream associated with a character array
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public:
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typedef _Alloc allocator_type;
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typedef basic_stringbuf<_Elem, _Traits, _Alloc> _Mysb;
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typedef basic_string<_Elem, _Traits, _Alloc> _Mystr;
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explicit basic_ostringstream(ios_base::openmode _Mode = ios_base::out)
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: basic_ostream<_Elem, _Traits>(&_Stringbuffer),
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_Stringbuffer(_Mode | ios_base::out)
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{ // construct empty writable character buffer
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}
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explicit basic_ostringstream(const _Mystr& _Str,
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ios_base::openmode _Mode = ios_base::out)
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: basic_ostream<_Elem, _Traits>(&_Stringbuffer),
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_Stringbuffer(_Str, _Mode | ios_base::out)
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{ // construct writable character buffer from NTCS
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}
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virtual ~basic_ostringstream()
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{ // destroy the object
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}
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_Mysb *rdbuf() const
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{ // return pointer to buffer
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return ((_Mysb *)&_Stringbuffer);
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}
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_Mystr str() const
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{ // return string copy of character array
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return (_Stringbuffer.str());
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}
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void str(const _Mystr& _Newstr)
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{ // replace character array from string
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_Stringbuffer.str(_Newstr);
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}
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private:
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_Mysb _Stringbuffer; // the string buffer
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};
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#ifdef _DLL_CPPLIB
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#ifdef __FORCE_INSTANCE
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template class _CRTIMP2 basic_ostringstream<char,
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char_traits<char>, allocator<char> >;
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template class _CRTIMP2 basic_ostringstream<wchar_t,
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char_traits<wchar_t>, allocator<wchar_t> >;
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#ifdef _CRTBLD_NATIVE_WCHAR_T
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template class _CRTIMP2 basic_ostringstream<unsigned short,
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char_traits<unsigned short>, allocator<unsigned short> >;
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#endif
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#endif // __FORCE_INSTANCE
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#endif // _DLL_CPPLIB
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// TEMPLATE CLASS basic_stringstream
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template<class _Elem,
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class _Traits,
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class _Alloc>
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class basic_stringstream
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: public basic_iostream<_Elem, _Traits>
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{ // input/output stream associated with a character array
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public:
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typedef _Elem char_type;
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typedef _Traits traits_type;
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typedef _Alloc allocator_type;
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typedef typename _Traits::int_type int_type;
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typedef typename _Traits::pos_type pos_type;
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typedef typename _Traits::off_type off_type;
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typedef basic_string<_Elem, _Traits, _Alloc> _Mystr;
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explicit basic_stringstream(ios_base::openmode _Mode =
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ios_base::in | ios_base::out)
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: basic_iostream<_Elem, _Traits>(&_Stringbuffer),
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_Stringbuffer(_Mode)
|
|
{ // construct empty character buffer
|
|
}
|
|
|
|
explicit basic_stringstream(const _Mystr& _Str,
|
|
ios_base::openmode _Mode = ios_base::in | ios_base::out)
|
|
: basic_iostream<_Elem, _Traits>(&_Stringbuffer),
|
|
_Stringbuffer(_Str, _Mode)
|
|
{ // construct character buffer from NTCS
|
|
}
|
|
|
|
virtual ~basic_stringstream()
|
|
{ // destroy the object
|
|
}
|
|
|
|
basic_stringbuf<_Elem, _Traits, _Alloc> *rdbuf() const
|
|
{ // return pointer to buffer
|
|
return ((basic_stringbuf<_Elem, _Traits, _Alloc> *)&_Stringbuffer);
|
|
}
|
|
|
|
_Mystr str() const
|
|
{ // return string copy of character array
|
|
return (_Stringbuffer.str());
|
|
}
|
|
|
|
void str(const _Mystr& _Newstr)
|
|
{ // replace character array from string
|
|
_Stringbuffer.str(_Newstr);
|
|
}
|
|
|
|
private:
|
|
basic_stringbuf<_Elem, _Traits, _Alloc>
|
|
_Stringbuffer; // the string buffer
|
|
};
|
|
|
|
#ifdef _DLL_CPPLIB
|
|
#ifdef __FORCE_INSTANCE
|
|
template class _CRTIMP2 basic_stringstream<char,
|
|
char_traits<char>, allocator<char> >;
|
|
template class _CRTIMP2 basic_stringstream<wchar_t,
|
|
char_traits<wchar_t>, allocator<wchar_t> >;
|
|
#ifdef _CRTBLD_NATIVE_WCHAR_T
|
|
template class _CRTIMP2 basic_stringstream<unsigned short,
|
|
char_traits<unsigned short>, allocator<unsigned short> >;
|
|
#endif
|
|
#endif // __FORCE_INSTANCE
|
|
#endif // _DLL_CPPLIB
|
|
_STD_END
|
|
#pragma warning(default: 4251)
|
|
#pragma warning(pop)
|
|
#pragma pack(pop)
|
|
|
|
#endif /* _SSTREAM_ */
|
|
|
|
/*
|
|
* Copyright (c) 1992-2001 by P.J. Plauger. ALL RIGHTS RESERVED.
|
|
* Consult your license regarding permissions and restrictions.
|
|
V3.10:0009 */
|