#include <c_streambuf_defs.hh>

Inheritance diagram for Parma_Polyhedra_Library::c_streambuf:

Collaboration diagram for Parma_Polyhedra_Library::c_streambuf:

Public Member Functions
	c_streambuf ()
	Constructor. More...

virtual	~c_streambuf ()
	Destructor. More...

Protected Member Functions
virtual int_type	underflow ()
	Gets a character in case of underflow. More...

virtual int_type	uflow ()
	In case of underflow, gets a character and advances the next pointer. More...

virtual std::streamsize	xsgetn (char_type *s, std::streamsize n)
	Gets a sequence of characters. More...

virtual int_type	pbackfail (int_type c=traits_type::eof())
	Puts character back in case of backup underflow. More...

virtual std::streamsize	xsputn (const char_type *s, std::streamsize n)
	Writes a sequence of characters. More...

virtual int_type	overflow (int_type c)
	Writes a character in case of overflow. More...

virtual int	sync ()
	Synchronizes the stream buffer. More...

Private Types
typedef char	char_type
	Character type of the streambuf. More...

typedef std::char_traits< char_type >	traits_type
	Traits type of the streambuf. More...

typedef traits_type::int_type	int_type
	Integer type of the streambuf. More...

Private Member Functions
virtual size_t	cb_read (char *, size_t)

virtual size_t	cb_write (const char *, size_t)

virtual int	cb_sync ()

virtual int	cb_flush ()

Private Attributes
int_type	unget_char_buf
	Buffer for the last character read. More...

int_type	next_char_buf
	Buffer for next character. More...

Detailed Description

Definition at line 31 of file c_streambuf_defs.hh.

Member Typedef Documentation

typedef char Parma_Polyhedra_Library::c_streambuf::char_type

private

Character type of the streambuf.

Definition at line 97 of file c_streambuf_defs.hh.

typedef traits_type::int_type Parma_Polyhedra_Library::c_streambuf::int_type

private

Integer type of the streambuf.

Definition at line 103 of file c_streambuf_defs.hh.

typedef std::char_traits<char_type> Parma_Polyhedra_Library::c_streambuf::traits_type

private

Traits type of the streambuf.

Definition at line 100 of file c_streambuf_defs.hh.

Constructor & Destructor Documentation

Parma_Polyhedra_Library::c_streambuf::c_streambuf ( )

inline

Constructor.

Definition at line 30 of file c_streambuf_inlines.hh.

31 : unget_char_buf(traits_type::eof()), next_char_buf(traits_type::eof()) {

32 }

Parma_Polyhedra_Library::c_streambuf::next_char_buf

int_type next_char_buf

Buffer for next character.

Definition: c_streambuf_defs.hh:109

Parma_Polyhedra_Library::c_streambuf::unget_char_buf

int_type unget_char_buf

Buffer for the last character read.

Definition: c_streambuf_defs.hh:106

Parma_Polyhedra_Library::c_streambuf::~c_streambuf ( )

virtual

Destructor.

Definition at line 31 of file c_streambuf.cc.

31 {

32 }

Member Function Documentation

virtual int Parma_Polyhedra_Library::c_streambuf::cb_flush ( )

inlineprivatevirtual

Definition at line 120 of file c_streambuf_defs.hh.

                          {
     return 0;
   }

virtual size_t Parma_Polyhedra_Library::c_streambuf::cb_read	(	char *	,
		size_t
	)

inlineprivatevirtual

Definition at line 111 of file c_streambuf_defs.hh.

Referenced by underflow(), and xsgetn().

                                          {
     return 0;
   }

virtual int Parma_Polyhedra_Library::c_streambuf::cb_sync ( )

inlineprivatevirtual

Definition at line 117 of file c_streambuf_defs.hh.

Referenced by sync().

                         {
     return 0;
   }

virtual size_t Parma_Polyhedra_Library::c_streambuf::cb_write	(	const char *	,
		size_t
	)

inlineprivatevirtual

Definition at line 114 of file c_streambuf_defs.hh.

Referenced by overflow(), and xsputn().

                                                 {
     return 0;
   }

c_streambuf::int_type Parma_Polyhedra_Library::c_streambuf::overflow ( int_type c )

protectedvirtual

Writes a character in case of overflow.

Specified by ISO/IEC 14882:1998: 27.5.2.4.5.

Definition at line 98 of file c_streambuf.cc.

References c, cb_write(), and sync().

                                 {
   const int_type eof = traits_type::eof();
   if (traits_type::eq_int_type(c, eof)) {
     return (sync() != 0) ? eof : traits_type::not_eof(c);
   }
   else {
     char buf = static_cast<char>(c);
     if (cb_write(&buf, 1) == 1) {
       return c;
     }
     else {
       return eof;
     }
   }
 }

c_streambuf::int_type Parma_Polyhedra_Library::c_streambuf::pbackfail ( int_type c = traits_type::eof() )

protectedvirtual

Puts character back in case of backup underflow.

Remarks: Specified by ISO/IEC 14882:1998: 27.5.2.4.4.

Definition at line 83 of file c_streambuf.cc.

References c, next_char_buf, and unget_char_buf.

                                  {
   const int_type eof = traits_type::eof();
   next_char_buf = traits_type::eq_int_type(c, eof) ? unget_char_buf : c;
   unget_char_buf = eof;
   return next_char_buf;
 }

int Parma_Polyhedra_Library::c_streambuf::sync ( )

protectedvirtual

Synchronizes the stream buffer.

Specified by ISO/IEC 14882:1998: 27.5.2.4.2.

Definition at line 115 of file c_streambuf.cc.

References cb_sync().

Referenced by overflow().

                   {
   return cb_sync();
 }

c_streambuf::int_type Parma_Polyhedra_Library::c_streambuf::uflow ( )

protectedvirtual

In case of underflow, gets a character and advances the next pointer.

Remarks: Specified by ISO/IEC 14882:1998: 27.5.2.4.3.

Definition at line 35 of file c_streambuf.cc.

References c, next_char_buf, and underflow().

                    {
   const int_type c = underflow();
   next_char_buf = traits_type::eof();
   return c;
 }

c_streambuf::int_type Parma_Polyhedra_Library::c_streambuf::underflow ( )

protectedvirtual

Gets a character in case of underflow.

Remarks: Specified by ISO/IEC 14882:1998: 27.5.2.4.3.

Definition at line 42 of file c_streambuf.cc.

References cb_read(), and next_char_buf.

Referenced by uflow().

                        {
   const int_type eof = traits_type::eof();
   if (traits_type::eq_int_type(next_char_buf, eof)) {
     char buf;
     if (cb_read(&buf, 1) == 1) {
       next_char_buf = buf;
     }
     else {
       next_char_buf = eof;
     }
   }
   return next_char_buf;
 }

std::streamsize Parma_Polyhedra_Library::c_streambuf::xsgetn	(	char_type *	s,
		std::streamsize	n
	)

protectedvirtual

Gets a sequence of characters.

Remarks: Specified by ISO/IEC 14882:1998: 27.5.2.4.3.

Definition at line 57 of file c_streambuf.cc.

References cb_read(), next_char_buf, and unget_char_buf.

                                                  {
   PPL_ASSERT(n >= 0);
   if (n == 0) {
     return n;
   }
   const int_type eof = traits_type::eof();
   const size_t sz_n = static_cast<size_t>(n);
   size_t a;
   if (traits_type::eq_int_type(next_char_buf, eof)) {
     a = 0;
   }
   else {
     s[0] = static_cast<char_type>(next_char_buf);
     a = 1;
   }
   const size_t r = cb_read(s + a, sz_n - a) + a;
   if (r > 0) {
     unget_char_buf = traits_type::to_int_type(s[r - 1]);
   }
   else {
     unget_char_buf = traits_type::eof();
   }
   return static_cast<std::streamsize>(r);
 }

std::streamsize Parma_Polyhedra_Library::c_streambuf::xsputn	(	const char_type *	s,
		std::streamsize	n
	)

protectedvirtual

Writes a sequence of characters.

Remarks: Specified by ISO/IEC 14882:1998: 27.5.2.4.5.

Definition at line 91 of file c_streambuf.cc.

References cb_write().

                                                        {
   PPL_ASSERT(n >= 0);
   const size_t r = cb_write(s, static_cast<size_t>(n));
   return static_cast<std::streamsize>(r);
 }

Member Data Documentation

int_type Parma_Polyhedra_Library::c_streambuf::next_char_buf

private

Buffer for next character.

Definition at line 109 of file c_streambuf_defs.hh.

Referenced by pbackfail(), uflow(), underflow(), and xsgetn().

int_type Parma_Polyhedra_Library::c_streambuf::unget_char_buf

private

Buffer for the last character read.

Definition at line 106 of file c_streambuf_defs.hh.

Referenced by pbackfail(), and xsgetn().

The documentation for this class was generated from the following files:

Public Member Functions

Protected Member Functions

Private Types

Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation