redi::basic_pstream< CharT, Traits >(3) | Library Functions Manual | redi::basic_pstream< CharT, Traits >(3) |
NAME¶
redi::basic_pstream< CharT, Traits > - Class template for Bidirectional PStreams.SYNOPSIS¶
#include <pstream.h>
Inherits basic_iostream< CharT, Traits >, redi::pstream_common< CharT, Traits >, and redi::pstreams.
Public Types¶
typedef pbase_type::pmode pmode
Type used to specify how to connect to the process. typedef pbase_type::argv_type argv_type
Type used to hold the arguments for a command. typedef int fd_type
Type used for file descriptors. typedef int fd_type
Type used for file descriptors.
Public Member Functions¶
basic_pstream ()
Default constructor, creates an uninitialised stream. basic_pstream (const std::string &cmd, pmode mode=pstdout|pstdin)
Constructor that initialises the stream by starting a process. basic_pstream (const std::string &file, const argv_type &argv, pmode mode=pstdout|pstdin)
Constructor that initialises the stream by starting a process. basic_pstream (const argv_type &argv, pmode mode=pstdout|pstdin)
Constructor that initialises the stream by starting a process. ~basic_pstream ()
Destructor. void open (const std::string &cmd, pmode mode=pstdout|pstdin)
Start a process. void open (const std::string &file, const argv_type &argv, pmode mode=pstdout|pstdin)
Start a process. basic_pstream & out ()
Set streambuf to read from process' stdout. basic_pstream & err ()
Set streambuf to read from process' stderr. 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. static const pmode newpg = std::ios_base::trunc
Create a new process group for the child process. 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. static const pmode newpg = std::ios_base::trunc
Create a new process group for the child process.
Protected Types¶
typedef basic_pstreambuf< CharT, Traits > streambuf_type
enum { bufsz = 32 }
enum { pbsz = 2 }
enum { bufsz = 32 }
enum { pbsz = 2 }
Protected Member Functions¶
void do_open (const std::string &cmd, 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.
Detailed Description¶
template<typename CharT, typename Traits = std::char_traits<CharT>>¶
class redi::basic_pstream< CharT, Traits >" Class template for Bidirectional PStreams.Writing to a pstream opened with pmode pstdin writes to the standard input of the command. Reading from a pstream opened with pmode pstdout and/or pstderr reads the command's standard output and/or standard error. Any of the process' stdin, stdout or stderr that is not connected to the pstream (as specified by the pmode) will be the same as the process that created the pstream object, unless altered by the command itself.
Constructor & Destructor Documentation¶
template<typename CharT , typename Traits = std::char_traits<CharT>> redi::basic_pstream< CharT, Traits >::basic_pstream (const std::string & cmd, pmode mode = pstdout|pstdin) [inline], [explicit]¶
Constructor that initialises the stream by starting a process. Initialises the stream buffer by calling do_open() with the supplied arguments.Parameters:
mode the I/O mode to use when opening the pipe.
See also:
template<typename CharT , typename Traits = std::char_traits<CharT>> redi::basic_pstream< CharT, Traits >::basic_pstream (const std::string & file, const argv_type & argv, pmode mode = pstdout|pstdin) [inline]¶
Constructor that initialises the stream by starting a process. Initialises the stream buffer by calling do_open() with the supplied arguments.Parameters:
argv a vector of argument strings passed to the new program.
mode the I/O mode to use when opening the pipe.
See also:
template<typename CharT , typename Traits = std::char_traits<CharT>> redi::basic_pstream< CharT, Traits >::basic_pstream (const argv_type & argv, pmode mode = pstdout|pstdin) [inline], [explicit]¶
Constructor that initialises the stream by starting a process. Initialises the stream buffer by calling do_open(argv[0],argv,mode)Parameters:
mode the I/O mode to use when opening the pipe.
See also:
References redi::pstreams::pstdin, and redi::pstreams::pstdout.
template<typename CharT , typename Traits = std::char_traits<CharT>> redi::basic_pstream< CharT, Traits >::~basic_pstream () [inline]¶
Destructor. Closes the stream and waits for the child to exit.Member Function Documentation¶
template<typename C , typename T > void redi::pstream_common< C, T >::close () [inline], [inherited]¶
Close the pipe. Calls rdbuf->close() and sets failbit on error.References redi::pstream_common< CharT, Traits >::buf_, and redi::basic_pstreambuf< CharT, Traits >::close().
template<typename C , typename T > const std::string & redi::pstream_common< C, T >::command () const [inline], [inherited]¶
Return the command used to initialise the stream.Returns:
References redi::pstream_common< CharT, Traits >::command_.
template<typename C , typename T > void redi::pstream_common< C, T >::do_open (const std::string & cmd, pmode mode) [inline], [protected], [inherited]¶
Start a process. Calls rdbuf()->open( command , mode ) and sets failbit on error.Parameters:
mode the I/O mode to use when opening the pipe.
See also:
References redi::pstream_common< CharT, Traits >::buf_, redi::pstream_common< CharT, Traits >::command_, and redi::basic_pstreambuf< CharT, Traits >::open().
Referenced by redi::pstream_common< CharT, Traits >::pstream_common().
template<typename C , typename T > void redi::pstream_common< C, T >::do_open (const std::string & file, const argv_type & argv, pmode mode) [inline], [protected], [inherited]¶
Start a process. Calls rdbuf()->open( file, argv, mode ) and sets failbit on error.Parameters:
argv a vector of argument strings passed to the new program.
mode the I/O mode to use when opening the pipe.
See also:
References redi::pstream_common< CharT, Traits >::buf_, redi::pstream_common< CharT, Traits >::command_, and redi::basic_pstreambuf< CharT, Traits >::open().
template<typename CharT , typename Traits = std::char_traits<CharT>> basic_pstream& redi::basic_pstream< CharT, Traits >::err () [inline]¶
Set streambuf to read from process' stderr.Returns:
template<typename C , typename T > bool redi::pstream_common< C, T >::is_open () const [inline], [inherited]¶
Report whether the stream's buffer has been initialised.Returns:
See also:
References redi::pstream_common< CharT, Traits >::buf_, and redi::basic_pstreambuf< CharT, Traits >::is_open().
template<typename CharT , typename Traits = std::char_traits<CharT>> void redi::basic_pstream< CharT, Traits >::open (const std::string & cmd, pmode mode = pstdout|pstdin) [inline]¶
Start a process. Calls do_open( cnd , mode ).Parameters:
mode the I/O mode to use when opening the pipe.
See also:
template<typename CharT , typename Traits = std::char_traits<CharT>> void redi::basic_pstream< CharT, Traits >::open (const std::string & file, const argv_type & argv, pmode mode = pstdout|pstdin) [inline]¶
Start a process. Calls do_open( file , argv , mode ).Parameters:
argv a vector of argument strings passed to the new program.
mode the I/O mode to use when opening the pipe.
See also:
template<typename CharT , typename Traits = std::char_traits<CharT>> basic_pstream& redi::basic_pstream< CharT, Traits >::out () [inline]¶
Set streambuf to read from process' stdout.Returns:
template<typename C , typename T > pstream_common< C, T >::streambuf_type * redi::pstream_common< C, T >::rdbuf () const [inline], [inherited]¶
Return a pointer to the stream buffer.Returns:
References redi::pstream_common< CharT, Traits >::buf_, redi::pstreams::pstderr, redi::pstreams::pstdin, and redi::pstreams::pstdout.
Author¶
Generated automatically by Doxygen for PStreams from the source code.Thu Jan 12 2017 | PStreams |