Mercurial > octave-nkf
view src/pager.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 | d865363208d6 |
children | 16f53d29049f |
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/* Copyright (C) 1993, 1994, 1995, 1996, 1997, 2000, 2002, 2005, 2006, 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/>. */ #if !defined (octave_pager_h) #define octave_pager_h 1 #include <iosfwd> #include <sstream> #include <string> #ifdef HAVE_SYS_TYPES_H #include <sys/types.h> #endif class OCTINTERP_API octave_pager_buf : public std::stringbuf { public: octave_pager_buf (void) : std::stringbuf (), diary_skip (0) { } void flush_current_contents_to_diary (void); void set_diary_skip (void); protected: int sync (void); private: size_t diary_skip; }; class OCTINTERP_API octave_pager_stream : public std::ostream { protected: octave_pager_stream (void); public: ~octave_pager_stream (void); void flush_current_contents_to_diary (void); void set_diary_skip (void); static octave_pager_stream& stream (void); private: static octave_pager_stream *instance; octave_pager_buf *pb; // No copying! octave_pager_stream (const octave_pager_stream&); octave_pager_stream& operator = (const octave_pager_stream&); }; class OCTINTERP_API octave_diary_buf : public std::stringbuf { public: octave_diary_buf (void) : std::stringbuf () { } protected: int sync (void); }; class OCTINTERP_API octave_diary_stream : public std::ostream { protected: octave_diary_stream (void); public: ~octave_diary_stream (void); static octave_diary_stream& stream (void); private: static octave_diary_stream *instance; octave_diary_buf *db; // No copying! octave_diary_stream (const octave_diary_stream&); octave_diary_stream& operator = (const octave_diary_stream&); }; #define octave_stdout (octave_pager_stream::stream ()) #define octave_diary (octave_diary_stream::stream ()) extern OCTINTERP_API void flush_octave_stdout (void); #endif /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: *** */