redi_pstream_common (3)

#include <pstream.h>

Inherits basic_ios< CharT, Traits >, and redi::pstreams.

Inherited by redi::basic_ipstream< CharT, Traits >, redi::basic_opstream< CharT, Traits >, redi::basic_pstream< CharT, Traits >, and redi::basic_rpstream< CharT, Traits > [private].

Public Types

typedef int fd_type

Type used for file descriptors.

Public Member Functions

void close ()

Close the pipe. bool is_open () const

Report whether the stream's buffer has been initialised. const std::string & command () const

Return the command used to initialise the stream. streambuf_type * rdbuf () const

Return a pointer to the stream buffer.

Static Public Attributes

static const pmode pstdin = std::ios_base::out

Write to stdin. static const pmode pstdout = std::ios_base::in

Read from stdout. static const pmode pstderr = std::ios_base::app

Read from stderr.

Protected Types

typedef basic_pstreambuf

< CharT, Traits > streambuf_type"

typedef pstreams::pmode pmode

typedef pstreams::argv_type argv_type

enum { bufsz = 32 }

enum { pbsz = 2 }

Protected Member Functions

pstream_common ()

Default constructor. pstream_common (const std::string &command, pmode mode)

Constructor that initialises the stream by starting a process. pstream_common (const std::string &file, const argv_type &argv, pmode mode)

Constructor that initialises the stream by starting a process. virtual ~pstream_common ()=0

Pure virtual destructor. void do_open (const std::string &command, pmode mode)

Start a process. void do_open (const std::string &file, const argv_type &argv, pmode mode)

Start a process.

Protected Attributes

std::string command_

The command used to start the process. streambuf_type buf_

The stream buffer.

template<typename CharT, typename Traits = std::char_traits<CharT>>class redi::pstream_common< CharT, Traits >

Class template for common base class.

Abstract Base Class providing common functionality for basic_ipstream, basic_opstream and basic_pstream. pstream_common manages the basic_pstreambuf stream buffer that is used by the derived classes to initialise an iostream class.

template<typename C , typename T > \fBredi::pstream_common\fP< C, T >::\fBpstream_common\fP ()\fC [inline]\fP, \fC [protected]\fP

Default constructor. Creates an uninitialised stream.

References redi::pstream_common< CharT, Traits >::buf_.

template<typename C , typename T > \fBredi::pstream_common\fP< C, T >::\fBpstream_common\fP (const std::string &command, \fBpmode\fPmode)\fC [inline]\fP, \fC [protected]\fP

Constructor that initialises the stream by starting a process. Initialises the stream buffer by calling do_open( command , mode )

Parameters:

command a string containing a shell command.

mode the I/O mode to use when opening the pipe.

See Also:

do_open(const std::string&, pmode)

References redi::pstream_common< CharT, Traits >::buf_, and redi::pstream_common< CharT, Traits >::do_open().

template<typename C , typename T > \fBredi::pstream_common\fP< C, T >::\fBpstream_common\fP (const std::string &file, const \fBargv_type\fP &argv, \fBpmode\fPmode)\fC [inline]\fP, \fC [protected]\fP

Constructor that initialises the stream by starting a process. Initialises the stream buffer by calling do_open( file , argv , mode )

Parameters:

file a string containing the pathname of a program to execute.

argv a vector of argument strings passed to the new program.

mode the I/O mode to use when opening the pipe.

See Also:

do_open(const std::string&, const argv_type&, pmode)

References redi::pstream_common< CharT, Traits >::buf_, and redi::pstream_common< CharT, Traits >::do_open().

template<typename C , typename T > \fBredi::pstream_common\fP< C, T >::~\fBpstream_common\fP ()\fC [inline]\fP, \fC [protected]\fP, \fC [pure virtual]\fP

Pure virtual destructor. This is a pure virtual function to make pstream_common abstract. Because it is the destructor it will be called by derived classes and so must be defined. It is also protected, to discourage use of the PStreams classes through pointers or references to the base class.

See Also:

If defining a pure virtual seems odd you should read http://www.gotw.ca/gotw/031.htm (and the rest of the site as well!)

template<typename C , typename T > void \fBredi::pstream_common\fP< C, T >::close ()\fC [inline]\fP

Close the pipe. Calls rdbuf->close() and sets failbit on error.

template<typename C , typename T > const std::string & \fBredi::pstream_common\fP< C, T >::command () const\fC [inline]\fP

Return the command used to initialise the stream.

Returns:

a string containing the command used to initialise the stream.

template<typename C , typename T > void \fBredi::pstream_common\fP< C, T >::do_open (const std::string &command, \fBpmode\fPmode)\fC [inline]\fP, \fC [protected]\fP

Start a process. Calls rdbuf()->open( command , mode ) and sets failbit on error.

Parameters:

command a string containing a shell command.

mode the I/O mode to use when opening the pipe.

See Also:

basic_pstreambuf::open(const std::string&, pmode)

Referenced by redi::basic_ipstream< CharT, Traits >::open(), redi::basic_opstream< CharT, Traits >::open(), redi::basic_pstream< CharT, Traits >::open(), redi::basic_rpstream< CharT, Traits >::open(), and redi::pstream_common< CharT, Traits >::pstream_common().

template<typename C , typename T > void \fBredi::pstream_common\fP< C, T >::do_open (const std::string &file, const \fBargv_type\fP &argv, \fBpmode\fPmode)\fC [inline]\fP, \fC [protected]\fP

Start a process. Calls rdbuf()->open( file, argv, mode ) and sets failbit on error.

Parameters:

file a string containing the pathname of a program to execute.

argv a vector of argument strings passed to the new program.

mode the I/O mode to use when opening the pipe.

See Also:

basic_pstreambuf::open(const std::string&, const argv_type&, pmode)

template<typename C , typename T > bool \fBredi::pstream_common\fP< C, T >::is_open () const\fC [inline]\fP

Report whether the stream's buffer has been initialised.

Returns:

rdbuf()->is_open().

See Also:

basic_pstreambuf::is_open()

template<typename C , typename T > \fBpstream_common\fP< C, T >::\fBstreambuf_type\fP * \fBredi::pstream_common\fP< C, T >::rdbuf () const\fC [inline]\fP

Return a pointer to the stream buffer.

Returns:

a pointer to the private stream buffer member.

Generated automatically by Doxygen for PStreams from the source code.