Mercurial > octave-nkf
view src/oct-procbuf.h @ 8964:f4f4d65faaa0
Implement sparse * diagonal and diagonal * sparse operations, double-prec only.
Date: Sun, 8 Mar 2009 16:28:18 -0400
These preserve sparsity, so eye(5) * sprand (5, 5, .2) is *sparse*
and not dense. This may affect people who use multiplication by
eye() rather than full().
The liboctave routines do *not* check if arguments are scalars in
disguise. There is a type problem with checking at that level. I
suspect we want diag * "sparse scalar" to stay diagonal, but we have
to return a sparse matrix at the liboctave. Rather than worrying
about that in liboctave, we cope with it when binding to Octave and
return the correct higher-level type.
The implementation is in Sparse-diag-op-defs.h rather than
Sparse-op-defs.h to limit recompilation. And the implementations
are templates rather than macros to produce better compiler errors
and debugging information.
author | Jason Riedy <jason@acm.org> |
---|---|
date | Mon, 09 Mar 2009 17:49:13 -0400 |
parents | a1dbe9d80eee |
children | cd96d29c5efa |
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/* Copyright (C) 1996, 1997, 1998, 2000, 2005, 2007 John W. Eaton This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ // This class is based on the procbuf class from libg++, written by // Per Bothner, Copyright (C) 1993 Free Software Foundation. #if !defined (octave_octave_procbuf_h) #define octave_octave_procbuf_h 1 #ifdef HAVE_SYS_TYPES_H #include <sys/types.h> #endif #include "c-file-ptr-stream.h" class octave_procbuf : public c_file_ptr_buf { public: octave_procbuf (void) : c_file_ptr_buf (0), wstatus (-1), open_p (false), proc_pid (-1), next (0) { } octave_procbuf (const char *command, int mode) : c_file_ptr_buf (0), wstatus (-1), open_p (false), proc_pid (-1), next (0) { open (command, mode); } ~octave_procbuf (void) { close (); } octave_procbuf *open (const char *command, int mode); octave_procbuf *close (void); int wait_status (void) const { return wstatus; } bool is_open (void) const { return open_p; } pid_t pid (void) const { return proc_pid; } protected: int wstatus; bool open_p; pid_t proc_pid; octave_procbuf *next; }; extern void symbols_of_oct_procbuf (void); #endif /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: *** */