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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 49fe8721bae1
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/*

Copyright (C) 2003, 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_ls_mat4_h)
#define octave_ls_mat4 1

extern oct_mach_info::float_format
mopt_digit_to_float_format (int mach);

extern int
float_format_to_mopt_digit (oct_mach_info::float_format flt_fmt);

extern int
read_mat_file_header (std::istream& is, bool& swap, int32_t& mopt, 
		      int32_t& nr, int32_t& nc, int32_t& imag,
		      int32_t& len, int quiet = 0);

extern std::string
read_mat_binary_data (std::istream& is, const std::string& filename,
		      octave_value& tc);

extern bool
save_mat_binary_data (std::ostream& os, const octave_value& tc,
		      const std::string& name) ;

#endif

/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/