1 /* This is part of libio/iostream, providing -*- C++ -*- input/output. 2 Copyright (C) 1993 Free Software Foundation 3 4 This file is part of the GNU IO Library. This library is free 5 software; you can redistribute it and/or modify it under the 6 terms of the GNU General Public License as published by the 7 Free Software Foundation; either version 2, or (at your option) 8 any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this library; see the file COPYING. If not, write to the Free 17 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 19 As a special exception, if you link this library with files 20 compiled with a GNU compiler to produce an executable, this does not cause 21 the resulting executable to be covered by the GNU General Public License. 22 This exception does not however invalidate any other reasons why 23 the executable file might be covered by the GNU General Public License. */ 24 25 /* Written by Per Bothner (bothner@cygnus.com). */ 26 27 #ifndef _PFSTREAM_H 28 #define _PFSTREAM_H 29 #ifdef __GNUG__ 30 #pragma interface 31 #endif 32 #include <fstream.h> 33 34 extern "C++" { 35 // ipfstream foo("NAME") is like: ifstream foo("NAME"). However, 36 // if NAME starts *or ends* with a '|', the remainder of NAME is 37 // evaluated as a shell command (using a procbuf), and all input 38 // read from foo is whatever that shell writes to its standard output. 39 // E.g. ipfstream foo("|zcat foo.Z") or ipfstream foo("zcat foo.Z|") 40 // (These two forms are equivalent.) 41 42 class ipfstream : public ifstream { 43 public: 44 ipfstream(const char *name, int mode=ios::in, int prot=0664); 45 }; 46 47 // opfstream foo("NAME") is like: ofstream foo("NAME"). 48 // However, if NAME starts with a '|', the remainder of NAME is 49 // evaluated as a shell command (using a procbuf), and all output 50 // written to foo is piped to the standard input of that shell. 51 // E.g. opfstream foo("|more"); 52 53 class opfstream : public ofstream { 54 public: 55 opfstream(const char *name, int mode=ios::out, int prot=0664); 56 }; 57 } // extern "C++" 58 #endif /*!_PFSTREAM_H*/ 59 60