| 0,0 → 1,367 |
|---|
| // String based streams -*- C++ -*- |
| |
| // Copyright (C) 1997-1999 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 2, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING. If not, write to the Free |
| // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| // USA. |
| |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| |
| // |
| // ISO C++ 14882: 27.7 String-based streams |
| // |
| |
| #ifndef _CPP_SSTREAM |
| #define _CPP_SSTREAM 1 |
| |
| #pragma GCC system_header |
| |
| #include <bits/std_istream.h> |
| #include <bits/std_ostream.h> |
| |
| namespace std |
| { |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| class basic_stringbuf : public basic_streambuf<_CharT, _Traits> |
| { |
| public: |
| // Types: |
| typedef _CharT char_type; |
| typedef _Traits traits_type; |
| #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS |
| // 251. basic_stringbuf missing allocator_type |
| typedef _Alloc allocator_type; |
| #endif |
| typedef typename traits_type::int_type int_type; |
| typedef typename traits_type::pos_type pos_type; |
| typedef typename traits_type::off_type off_type; |
| |
| // Non-standard Types: |
| typedef basic_streambuf<char_type, traits_type> __streambuf_type; |
| typedef basic_string<char_type, _Traits, _Alloc> __string_type; |
| typedef typename __string_type::size_type __size_type; |
| |
| private: |
| // Data Members: |
| __string_type _M_string; |
| |
| public: |
| // Constructors: |
| explicit |
| basic_stringbuf(ios_base::openmode __mode = ios_base::in | ios_base::out) |
| : __streambuf_type(), _M_string() |
| { _M_stringbuf_init(__mode); } |
| |
| explicit |
| basic_stringbuf(const __string_type& __str, |
| ios_base::openmode __mode = ios_base::in | ios_base::out) |
| : __streambuf_type(), _M_string(__str.c_str()) |
| { _M_stringbuf_init(__mode); } |
| |
| // Get and set: |
| __string_type |
| str() const |
| { |
| if (_M_mode & ios_base::out) |
| { |
| // This is the deal: _M_string.size() is value that |
| // represents the size of the intial string that makes |
| // _M_string, and may not be the correct size of the |
| // current stringbuf internal buffer. |
| __size_type __len = _M_string.size(); |
| if (_M_out_cur > _M_out_beg) |
| __len = max(__size_type(_M_out_end - _M_out_beg), __len); |
| return __string_type(_M_out_beg, _M_out_beg + __len); |
| } |
| else |
| return _M_string; |
| } |
| |
| void |
| str(const __string_type& __s) |
| { |
| _M_string = __s; |
| _M_stringbuf_init(_M_mode); |
| } |
| |
| protected: |
| // Common initialization code for both ctors goes here. |
| void |
| _M_stringbuf_init(ios_base::openmode __mode) |
| { |
| // _M_buf_size is a convenient alias for "what the streambuf |
| // thinks the allocated size of the string really is." This is |
| // necessary as ostringstreams are implemented with the |
| // streambufs having control of the allocation and |
| // re-allocation of the internal string object, _M_string. |
| _M_buf_size = _M_string.size(); |
| |
| // NB: Start ostringstream buffers at 1024 bytes. This is an |
| // experimental value (pronounced "arbitrary" in some of the |
| // hipper english-speaking countries), and can be changed to |
| // suite particular needs. |
| _M_buf_size_opt = 512; |
| _M_mode = __mode; |
| if (_M_mode & ios_base::ate) |
| _M_really_sync(0, _M_buf_size); |
| else |
| _M_really_sync(0, 0); |
| } |
| |
| // Overridden virtual functions: |
| virtual int_type |
| underflow() |
| { |
| if (_M_in_cur && _M_in_cur < _M_in_end) |
| return traits_type::to_int_type(*gptr()); |
| else |
| return traits_type::eof(); |
| } |
| |
| virtual int_type |
| pbackfail(int_type __c = traits_type::eof()); |
| |
| virtual int_type |
| overflow(int_type __c = traits_type::eof()); |
| |
| virtual __streambuf_type* |
| setbuf(char_type* __s, streamsize __n) |
| { |
| if (__s && __n) |
| { |
| _M_string = __string_type(__s, __n); |
| _M_really_sync(0, 0); |
| } |
| return this; |
| } |
| |
| virtual pos_type |
| seekoff(off_type __off, ios_base::seekdir __way, |
| ios_base::openmode __mode = ios_base::in | ios_base::out); |
| |
| virtual pos_type |
| seekpos(pos_type __sp, |
| ios_base::openmode __mode = ios_base::in | ios_base::out); |
| |
| // Internal function for correctly updating the internal buffer |
| // for a particular _M_string, due to initialization or |
| // re-sizing of an existing _M_string. |
| // Assumes: contents of _M_string and internal buffer match exactly. |
| // __i == _M_in_cur - _M_in_beg |
| // __o == _M_out_cur - _M_out_beg |
| virtual int |
| _M_really_sync(__size_type __i, __size_type __o) |
| { |
| char_type* __base = const_cast<char_type*>(_M_string.data()); |
| bool __testin = _M_mode & ios_base::in; |
| bool __testout = _M_mode & ios_base::out; |
| __size_type __len = _M_string.size(); |
| |
| _M_buf = __base; |
| if (__testin) |
| this->setg(__base, __base + __i, __base + __len); |
| if (__testout) |
| { |
| this->setp(__base, __base + __len); |
| _M_out_cur += __o; |
| } |
| return 0; |
| } |
| }; |
| |
| |
| // 27.7.2 Template class basic_istringstream |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| class basic_istringstream : public basic_istream<_CharT, _Traits> |
| { |
| public: |
| // Types: |
| typedef _CharT char_type; |
| typedef _Traits traits_type; |
| #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS |
| // 251. basic_stringbuf missing allocator_type |
| typedef _Alloc allocator_type; |
| #endif |
| typedef typename traits_type::int_type int_type; |
| typedef typename traits_type::pos_type pos_type; |
| typedef typename traits_type::off_type off_type; |
| |
| // Non-standard types: |
| typedef basic_string<_CharT, _Traits, _Alloc> __string_type; |
| typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type; |
| typedef basic_istream<char_type, traits_type> __istream_type; |
| |
| private: |
| __stringbuf_type _M_stringbuf; |
| |
| public: |
| // Constructors: |
| explicit |
| basic_istringstream(ios_base::openmode __mode = ios_base::in) |
| : __istream_type(NULL), _M_stringbuf(__mode | ios_base::in) |
| { this->init(&_M_stringbuf); } |
| |
| explicit |
| basic_istringstream(const __string_type& __str, |
| ios_base::openmode __mode = ios_base::in) |
| : __istream_type(NULL), _M_stringbuf(__str, __mode | ios_base::in) |
| { this->init(&_M_stringbuf); } |
| |
| ~basic_istringstream() |
| { } |
| |
| // Members: |
| __stringbuf_type* |
| rdbuf() const |
| { return const_cast<__stringbuf_type*>(&_M_stringbuf); } |
| |
| __string_type |
| str() const |
| { return _M_stringbuf.str(); } |
| |
| void |
| str(const __string_type& __s) |
| { _M_stringbuf.str(__s); } |
| }; |
| |
| |
| // 27.7.3 Template class basic_ostringstream |
| template <typename _CharT, typename _Traits, typename _Alloc> |
| class basic_ostringstream : public basic_ostream<_CharT, _Traits> |
| { |
| public: |
| // Types: |
| typedef _CharT char_type; |
| typedef _Traits traits_type; |
| #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS |
| // 251. basic_stringbuf missing allocator_type |
| typedef _Alloc allocator_type; |
| #endif |
| typedef typename traits_type::int_type int_type; |
| typedef typename traits_type::pos_type pos_type; |
| typedef typename traits_type::off_type off_type; |
| |
| // Non-standard types: |
| typedef basic_string<_CharT, _Traits, _Alloc> __string_type; |
| typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type; |
| typedef basic_ostream<char_type, traits_type> __ostream_type; |
| |
| private: |
| __stringbuf_type _M_stringbuf; |
| |
| public: |
| // Constructors/destructor: |
| explicit |
| basic_ostringstream(ios_base::openmode __mode = ios_base::out) |
| : __ostream_type(NULL), _M_stringbuf(__mode | ios_base::out) |
| { this->init(&_M_stringbuf); } |
| |
| explicit |
| basic_ostringstream(const __string_type __str, |
| ios_base::openmode __mode = ios_base::out) |
| : __ostream_type(NULL), _M_stringbuf(__str, __mode | ios_base::out) |
| { this->init(&_M_stringbuf); } |
| |
| ~basic_ostringstream() |
| { } |
| |
| // Members: |
| __stringbuf_type* |
| rdbuf() const |
| { return const_cast<__stringbuf_type*>(&_M_stringbuf); } |
| |
| __string_type |
| str() const |
| { return _M_stringbuf.str(); } |
| |
| void |
| str(const __string_type& __s) |
| { _M_stringbuf.str(__s); } |
| }; |
| |
| |
| // 27.7.4 Template class basic_stringstream |
| template <typename _CharT, typename _Traits, typename _Alloc> |
| class basic_stringstream : public basic_iostream<_CharT, _Traits> |
| { |
| public: |
| // Types: |
| typedef _CharT char_type; |
| typedef _Traits traits_type; |
| #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS |
| // 251. basic_stringbuf missing allocator_type |
| typedef _Alloc allocator_type; |
| #endif |
| typedef typename traits_type::int_type int_type; |
| typedef typename traits_type::pos_type pos_type; |
| typedef typename traits_type::off_type off_type; |
| |
| // Non-standard Types: |
| typedef basic_string<_CharT, _Traits, _Alloc> __string_type; |
| typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type; |
| typedef basic_iostream<char_type, traits_type> __iostream_type; |
| |
| private: |
| __stringbuf_type _M_stringbuf; |
| |
| public: |
| // Constructors/destructors |
| explicit |
| basic_stringstream(ios_base::openmode __m = ios_base::out | ios_base::in) |
| : __iostream_type(NULL), _M_stringbuf(__m) |
| { this->init(&_M_stringbuf); } |
| |
| explicit |
| basic_stringstream(const __string_type& __str, |
| ios_base::openmode __m = ios_base::out | ios_base::in) |
| : __iostream_type(NULL), _M_stringbuf(__str, __m) |
| { this->init(&_M_stringbuf); } |
| |
| ~basic_stringstream() |
| { } |
| |
| // Members: |
| __stringbuf_type* |
| rdbuf() const |
| { return const_cast<__stringbuf_type*>(&_M_stringbuf); } |
| |
| __string_type |
| str() const |
| { return _M_stringbuf.str(); } |
| |
| void |
| str(const __string_type& __s) |
| { _M_stringbuf.str(__s); } |
| }; |
| } // namespace std |
| |
| |
| |
| #ifdef _GLIBCPP_NO_TEMPLATE_EXPORT |
| # define export |
| #ifdef _GLIBCPP_FULLY_COMPLIANT_HEADERS |
| # include <bits/sstream.tcc> |
| #endif |
| #endif |
| |
| #endif // _CPP_SSTREAM |