williamr@2: /*
williamr@2:  * Copyright (c) 1999
williamr@2:  * Silicon Graphics Computer Systems, Inc.
williamr@2:  *
williamr@4:  * Copyright (c) 1999
williamr@2:  * Boris Fomitchev
williamr@2:  *
williamr@2:  * This material is provided "as is", with absolutely no warranty expressed
williamr@2:  * or implied. Any use is at your own risk.
williamr@2:  *
williamr@4:  * Permission to use or copy this software for any purpose is hereby granted
williamr@2:  * without fee, provided the above notices are retained on all copies.
williamr@2:  * Permission to modify the code and to distribute modified code is granted,
williamr@2:  * provided the above notices are retained, and a notice that the code was
williamr@2:  * modified is included with the above copyright notice.
williamr@2:  *
williamr@4:  */
williamr@4: #ifndef _STLP_INTERNAL_ISTREAM
williamr@4: #define _STLP_INTERNAL_ISTREAM
williamr@2: 
williamr@2: // this block is included by _ostream.h, we include it here to lower #include level
williamr@4: #if defined (_STLP_HAS_WCHAR_T) && !defined (_STLP_INTERNAL_CWCHAR)
williamr@2: #  include <stl/_cwchar.h>
williamr@4: #endif
williamr@2: 
williamr@4: #ifndef _STLP_INTERNAL_IOS_H
williamr@2: #  include <stl/_ios.h>                  // For basic_ios<>.  Includes <iosfwd>.
williamr@4: #endif
williamr@2: 
williamr@2: #ifndef _STLP_INTERNAL_OSTREAM_H
williamr@4: #  include <stl/_ostream.h>              // Needed as a base class of basic_iostream.
williamr@2: #endif
williamr@2: 
williamr@2: #ifndef _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H
williamr@4: #  include <stl/_istreambuf_iterator.h>
williamr@2: #endif
williamr@2: 
williamr@2: #include <stl/_ctraits_fns.h>    // Helper functions that allow char traits
williamr@2:                                 // to be used as function objects.
williamr@2: _STLP_BEGIN_NAMESPACE
williamr@2: 
williamr@2: #if defined (_STLP_USE_TEMPLATE_EXPORT)
williamr@2: template <class _CharT, class _Traits>
williamr@2: class _Isentry;
williamr@2: #endif
williamr@2: 
williamr@2: struct _No_Skip_WS {};        // Dummy class used by sentry.
williamr@2: 
williamr@2: template <class _CharT, class _Traits>
williamr@4: bool _M_init_skip(basic_istream<_CharT, _Traits>& __istr);
williamr@2: template <class _CharT, class _Traits>
williamr@4: bool _M_init_noskip(basic_istream<_CharT, _Traits>& __istr);
williamr@2: 
williamr@2: //----------------------------------------------------------------------
williamr@2: // Class basic_istream, a class that performs formatted input through
williamr@2: // a stream buffer.
williamr@2: 
williamr@2: // The second template parameter, _Traits, defaults to char_traits<_CharT>.
williamr@2: // The default is declared in header <iosfwd>, and it isn't declared here
williamr@4: // because C++ language rules do not allow it to be declared twice.
williamr@2: 
williamr@2: template <class _CharT, class _Traits>
williamr@2: class basic_istream : virtual public basic_ios<_CharT, _Traits> {
williamr@4:   typedef basic_istream<_CharT, _Traits> _Self;
williamr@4: 
williamr@4: #if defined (_STLP_MSVC) && (_STLP_MSVC >= 1300 && _STLP_MSVC <= 1310)
williamr@4:   //explicitely defined as private to avoid warnings:
williamr@4:   basic_istream(_Self const&);
williamr@4:   _Self& operator = (_Self const&);
williamr@4: #endif
williamr@4: 
williamr@2: public:
williamr@2:                          // Types
williamr@2:   typedef _CharT                     char_type;
williamr@2:   typedef typename _Traits::int_type int_type;
williamr@2:   typedef typename _Traits::pos_type pos_type;
williamr@2:   typedef typename _Traits::off_type off_type;
williamr@2:   typedef _Traits                    traits_type;
williamr@2:   typedef basic_ios<_CharT, _Traits>     _Basic_ios;
williamr@2: 
williamr@2:   typedef basic_ios<_CharT, _Traits>& (_STLP_CALL *__ios_fn)(basic_ios<_CharT, _Traits>&);
williamr@2:   typedef ios_base& (_STLP_CALL *__ios_base_fn)(ios_base&);
williamr@2:   typedef _Self& (_STLP_CALL *__istream_fn)(_Self&);
williamr@2: 
williamr@2: public:                         // Constructor and destructor.
williamr@4:   explicit basic_istream(basic_streambuf<_CharT, _Traits>* __buf) :
williamr@4:     basic_ios<_CharT, _Traits>(), _M_gcount(0) {
williamr@4:     this->init(__buf);
williamr@4:   }
williamr@4:   ~basic_istream() {};
williamr@2: 
williamr@2: public:                         // Nested sentry class.
williamr@2: 
williamr@2: public:                         // Hooks for manipulators.  The arguments are
williamr@2:                                 // function pointers.
williamr@2:   _Self& operator>> (__istream_fn __f) { return __f(*this); }
williamr@2:   _Self& operator>> (__ios_fn __f) {  __f(*this); return *this; }
williamr@2:   _Self& operator>> (__ios_base_fn __f) { __f(*this); return *this; }
williamr@2: 
williamr@2: public:                         // Formatted input of numbers.
williamr@4:   _Self& operator>> (short& __val);
williamr@4:   _Self& operator>> (int& __val);
williamr@4:   _Self& operator>> (unsigned short& __val);
williamr@4:   _Self& operator>> (unsigned int& __val);
williamr@4:   _Self& operator>> (long& __val);
williamr@4:   _Self& operator>> (unsigned long& __val);
williamr@2: #ifdef _STLP_LONG_LONG
williamr@4:   _Self& operator>> (_STLP_LONG_LONG& __val);
williamr@4:   _Self& operator>> (unsigned _STLP_LONG_LONG& __val);
williamr@4: #endif
williamr@4:   _Self& operator>> (float& __val);
williamr@4:   _Self& operator>> (double& __val);
williamr@2: # ifndef _STLP_NO_LONG_DOUBLE
williamr@4:   _Self& operator>> (long double& __val);
williamr@2: # endif
williamr@2: # ifndef _STLP_NO_BOOL
williamr@4:   _Self& operator>> (bool& __val);
williamr@2: # endif
williamr@4:   _Self& operator>> (void*& __val);
williamr@2: 
williamr@2: public:                         // Copying characters into a streambuf.
williamr@2:   _Self& operator>>(basic_streambuf<_CharT, _Traits>*);
williamr@2: 
williamr@2: public:                         // Unformatted input.
williamr@2:   streamsize gcount() const { return _M_gcount; }
williamr@2:   int_type peek();
williamr@2: 
williamr@2: public:                         // get() for single characters
williamr@2:   int_type get();
williamr@2:   _Self& get(char_type& __c);
williamr@2: 
williamr@2: public:                         // get() for character arrays.
williamr@2:   _Self& get(char_type* __s, streamsize __n, char_type __delim);
williamr@2:   _Self& get(char_type* __s, streamsize __n)
williamr@2:     { return get(__s, __n, this->widen('\n')); }
williamr@2: 
williamr@2: public:                         // get() for streambufs
williamr@2:   _Self& get(basic_streambuf<_CharT, _Traits>& __buf,
williamr@2:                      char_type __delim);
williamr@2:   _Self& get(basic_streambuf<_CharT, _Traits>& __buf)
williamr@2:     { return get(__buf, this->widen('\n')); }
williamr@2: 
williamr@2: public:                         // getline()
williamr@2:   _Self& getline(char_type* __s, streamsize __n, char_type delim);
williamr@2:   _Self& getline(char_type* __s, streamsize __n)
williamr@2:     { return getline(__s, __n, this->widen('\n')); }
williamr@2: 
williamr@2: public:                         // read(), readsome(), ignore()
williamr@2:   _Self& ignore();
williamr@2:   _Self& ignore(streamsize __n);
williamr@2: #if (defined (_STLP_MSVC) && _STLP_MSVC < 1200)
williamr@2:   inline
williamr@2: #endif
williamr@2:   _Self& ignore(streamsize __n, int_type __delim);
williamr@2: 
williamr@2:   _Self& read(char_type* __s, streamsize __n);
williamr@2:   streamsize readsome(char_type* __s, streamsize __n);
williamr@2: 
williamr@2: public:                         // putback
williamr@2:   _Self& putback(char_type __c);
williamr@2:   _Self& unget();
williamr@2: 
williamr@2: public:                         // Positioning and buffer control.
williamr@2:   int sync();
williamr@2: 
williamr@2:   pos_type tellg();
williamr@2:   _Self& seekg(pos_type __pos);
williamr@2:   _Self& seekg(off_type, ios_base::seekdir);
williamr@2: 
williamr@2: public:                         // Helper functions for non-member extractors.
williamr@2:   void _M_formatted_get(_CharT& __c);
williamr@2:   void _M_formatted_get(_CharT* __s);
williamr@2:   void _M_skip_whitespace(bool __set_failbit);
williamr@2: 
williamr@2: private:                        // Number of characters extracted by the
williamr@2:   streamsize _M_gcount;         // most recent unformatted input function.
williamr@2: 
williamr@2: public:
williamr@2: 
williamr@2: #if defined (_STLP_USE_TEMPLATE_EXPORT)
williamr@2:   // If we are using DLL specs, we have not to use inner classes
williamr@2:   // end class declaration here
williamr@2:   typedef _Isentry<_CharT, _Traits>      sentry;
williamr@2: };
williamr@2: #  define sentry _Isentry
williamr@2: template <class _CharT, class _Traits>
williamr@2: class _Isentry {
williamr@2:   typedef _Isentry<_CharT, _Traits> _Self;
williamr@2: # else
williamr@2:   class sentry {
williamr@2:     typedef sentry _Self;
williamr@2: #endif
williamr@4: 
williamr@2:   private:
williamr@2:     const bool _M_ok;
williamr@2:     //    basic_streambuf<_CharT, _Traits>* _M_buf;
williamr@4: 
williamr@2:   public:
williamr@2:     typedef _Traits traits_type;
williamr@4: 
williamr@4:     explicit sentry(basic_istream<_CharT, _Traits>& __istr,
williamr@4:                     bool __noskipws = false) :
williamr@4:       _M_ok((__noskipws || !(__istr.flags() & ios_base::skipws)) ? _M_init_noskip(__istr) : _M_init_skip(__istr) )
williamr@4:       /* , _M_buf(__istr.rdbuf()) */
williamr@2:       {}
williamr@4: 
williamr@4:     // Calling this constructor is the same as calling the previous one with
williamr@2:     // __noskipws = true, except that it doesn't require a runtime test.
williamr@4:     sentry(basic_istream<_CharT, _Traits>& __istr, _No_Skip_WS) : /* _M_buf(__istr.rdbuf()), */
williamr@4:       _M_ok(_M_init_noskip(__istr)) {}
williamr@4: 
williamr@2:     ~sentry() {}
williamr@4: 
williamr@2:     operator bool() const { return _M_ok; }
williamr@4: 
williamr@2:   private:                        // Disable assignment and copy constructor.
williamr@4:     //Implementation is here only to avoid warning with some compilers.
williamr@2:     sentry(const _Self&) : _M_ok(false) {}
williamr@4:     _Self& operator=(const _Self&) { return *this; }
williamr@2:   };
williamr@4: 
williamr@2: # if defined (_STLP_USE_TEMPLATE_EXPORT)
williamr@2: #  undef sentry
williamr@2: # else
williamr@2:   // close basic_istream class definition here
williamr@2: };
williamr@2: # endif
williamr@2: 
williamr@2: # if defined (_STLP_USE_TEMPLATE_EXPORT)
williamr@2: _STLP_EXPORT_TEMPLATE_CLASS _Isentry<char, char_traits<char> >;
williamr@2: _STLP_EXPORT_TEMPLATE_CLASS basic_istream<char, char_traits<char> >;
williamr@2: #  if ! defined (_STLP_NO_WCHAR_T)
williamr@2: _STLP_EXPORT_TEMPLATE_CLASS _Isentry<wchar_t, char_traits<wchar_t> >;
williamr@2: _STLP_EXPORT_TEMPLATE_CLASS basic_istream<wchar_t, char_traits<wchar_t> >;
williamr@2: #  endif
williamr@2: # endif /* _STLP_USE_TEMPLATE_EXPORT */
williamr@2: 
williamr@2: // Non-member character and string extractor functions.
williamr@2: template <class _CharT, class _Traits>
williamr@4: inline basic_istream<_CharT, _Traits>& _STLP_CALL
williamr@4: operator>>(basic_istream<_CharT, _Traits>& __in_str, _CharT& __c) {
williamr@4:   __in_str._M_formatted_get(__c);
williamr@4:   return __in_str;
williamr@2: }
williamr@2: 
williamr@2: template <class _Traits>
williamr@4: inline basic_istream<char, _Traits>& _STLP_CALL
williamr@4: operator>>(basic_istream<char, _Traits>& __in_str, unsigned char& __c) {
williamr@4:   __in_str._M_formatted_get(__REINTERPRET_CAST(char&,__c));
williamr@4:   return __in_str;
williamr@2: }
williamr@2: 
williamr@2: template <class _Traits>
williamr@4: inline basic_istream<char, _Traits>& _STLP_CALL
williamr@4: operator>>(basic_istream<char, _Traits>& __in_str, signed char& __c) {
williamr@4:   __in_str._M_formatted_get(__REINTERPRET_CAST(char&,__c));
williamr@4:   return __in_str;
williamr@2: }
williamr@2: 
williamr@2: template <class _CharT, class _Traits>
williamr@4: inline basic_istream<_CharT, _Traits>& _STLP_CALL
williamr@4: operator>>(basic_istream<_CharT, _Traits>& __in_str, _CharT* __s) {
williamr@4:   __in_str._M_formatted_get(__s);
williamr@4:   return __in_str;
williamr@2: }
williamr@2: 
williamr@2: template <class _Traits>
williamr@4: inline basic_istream<char, _Traits>& _STLP_CALL
williamr@4: operator>>(basic_istream<char, _Traits>& __in_str, unsigned char* __s) {
williamr@4:   __in_str._M_formatted_get(__REINTERPRET_CAST(char*,__s));
williamr@4:   return __in_str;
williamr@2: }
williamr@2: 
williamr@2: template <class _Traits>
williamr@4: inline basic_istream<char, _Traits>& _STLP_CALL
williamr@4: operator>>(basic_istream<char, _Traits>& __in_str, signed char* __s) {
williamr@4:   __in_str._M_formatted_get(__REINTERPRET_CAST(char*,__s));
williamr@4:   return __in_str;
williamr@2: }
williamr@2: 
williamr@2: //----------------------------------------------------------------------
williamr@2: // istream manipulator.
williamr@2: template <class _CharT, class _Traits>
williamr@2: basic_istream<_CharT, _Traits>& _STLP_CALL
williamr@4: ws(basic_istream<_CharT, _Traits>& __istr) {
williamr@4:   if (!__istr.eof()) {
williamr@4:     typedef typename basic_istream<_CharT, _Traits>::sentry      _Sentry;
williamr@4:     _Sentry __sentry(__istr, _No_Skip_WS()); // Don't skip whitespace.
williamr@4:     if (__sentry)
williamr@4:       __istr._M_skip_whitespace(false);
williamr@4:   }
williamr@4:   return __istr;
williamr@4: }
williamr@4: 
williamr@4: // Helper functions for istream<>::sentry constructor.
williamr@4: template <class _CharT, class _Traits>
williamr@4: inline bool _M_init_skip(basic_istream<_CharT, _Traits>& __istr) {
williamr@4:   if (__istr.good()) {
williamr@4:     if (__istr.tie())
williamr@4:       __istr.tie()->flush();
williamr@4: 
williamr@4:     __istr._M_skip_whitespace(true);
williamr@4:   }
williamr@4: 
williamr@4:   if (!__istr.good()) {
williamr@4:     __istr.setstate(ios_base::failbit);
williamr@4:     return false;
williamr@4:   } else
williamr@4:     return true;
williamr@4: }
williamr@4: 
williamr@4: template <class _CharT, class _Traits>
williamr@4: inline bool _M_init_noskip(basic_istream<_CharT, _Traits>& __istr) {
williamr@4:   if (__istr.good()) {
williamr@4:     if (__istr.tie())
williamr@4:       __istr.tie()->flush();
williamr@4: 
williamr@4:     if (!__istr.rdbuf())
williamr@4:       __istr.setstate(ios_base::badbit);
williamr@4:   }
williamr@4:   else
williamr@4:     __istr.setstate(ios_base::failbit);
williamr@4:   return __istr.good();
williamr@4: }
williamr@2: 
williamr@2: //----------------------------------------------------------------------
williamr@2: // Class iostream.
williamr@2: template <class _CharT, class _Traits>
williamr@2: class basic_iostream
williamr@2:   : public basic_istream<_CharT, _Traits>,
williamr@2:     public basic_ostream<_CharT, _Traits>
williamr@2: {
williamr@2: public:
williamr@2:   typedef basic_ios<_CharT, _Traits> _Basic_ios;
williamr@2: 
williamr@4:   explicit basic_iostream(basic_streambuf<_CharT, _Traits>* __buf);
williamr@4:   virtual ~basic_iostream();
williamr@2: };
williamr@2: 
williamr@2: # if defined (_STLP_USE_TEMPLATE_EXPORT)
williamr@2: _STLP_EXPORT_TEMPLATE_CLASS basic_iostream<char, char_traits<char> >;
williamr@4: 
williamr@2: #  if ! defined (_STLP_NO_WCHAR_T)
williamr@2: _STLP_EXPORT_TEMPLATE_CLASS basic_iostream<wchar_t, char_traits<wchar_t> >;
williamr@2: #  endif
williamr@2: # endif /* _STLP_USE_TEMPLATE_EXPORT */
williamr@2: 
williamr@2: template <class _CharT, class _Traits>
williamr@4: basic_streambuf<_CharT, _Traits>* _STLP_CALL _M_get_istreambuf(basic_istream<_CharT, _Traits>& __istr)
williamr@4: { return __istr.rdbuf(); }
williamr@2: 
williamr@2: _STLP_END_NAMESPACE
williamr@2: 
williamr@4: #if defined (_STLP_EXPOSE_STREAM_IMPLEMENTATION) && !defined (_STLP_LINK_TIME_INSTANTIATION)
williamr@2: #  include <stl/_istream.c>
williamr@4: #endif
williamr@2: 
williamr@4: #endif /* _STLP_INTERNAL_ISTREAM */
williamr@2: 
williamr@2: // Local Variables:
williamr@2: // mode:C++
williamr@2: // End: