Mercurial > octave-nkf
view src/procstream.cc @ 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 | d865363208d6 |
children | 16f53d29049f |
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/* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2002, 2004, 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/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <iostream> #include "procstream.h" procstreambase::procstreambase (const std::string& command, int mode) { pb_init (); if (! pb.open (command.c_str (), mode)) std::ios::setstate (std::ios::badbit); } procstreambase::procstreambase (const char *command, int mode) { pb_init (); if (! pb.open (command, mode)) std::ios::setstate (std::ios::badbit); } void procstreambase::open (const char *command, int mode) { clear (); if (! pb.open (command, mode)) std::ios::setstate (std::ios::badbit); } int procstreambase::close (void) { int status = 0; if (is_open ()) { if (! pb.close ()) std::ios::setstate (std::ios::failbit); status = pb.wait_status (); } return status; } /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: *** */