view liboctave/lo-cutils.c @ 8966:1bba53c0a38d

Implement diag + sparse, diag - sparse, sparse + diag, sparse - diag. Date: Mon, 9 Mar 2009 17:45:22 -0400 This does not use the typical sparse-mx-ops generator. I suspect the sematics of elementwise multiplication and division to be rather controversial, so they are not included. If comparison operations are added, the implementation should be shifted over to use the typical generator. The template in Sparse-diag-op-defs.h likely could use const bools rather than functional argument operations. I haven't measured which is optimized more effectively. Also, the Octave binding layer in op-dm-scm.cc likely could use all sorts of macro or template trickery, but it's far easier to let Emacs handle it for now. That would be worth revisiting if further elementwise sparse and diagonal operations are added.
author Jason Riedy <jason@acm.org>
date Mon, 09 Mar 2009 17:49:14 -0400
parents a1dbe9d80eee
children 4c0cdbe0acca
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/*

Copyright (C) 2000, 2001, 2002, 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/>.

*/

/*

The function gethostname was adapted from a similar function from GNU
Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 Free
Software Foundation, Inc.

*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

/* This gives us a better chance of finding a prototype for strptime
   on some systems.  */

#if ! defined (_XOPEN_SOURCE)
#define _XOPEN_SOURCE
#endif

#ifdef HAVE_UNISTD_H
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <unistd.h>
#endif

#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "syswait.h"

OCTAVE_API void
octave_qsort (void *base, size_t n, size_t size,
	      int (*cmp) (const void *, const void *))
{
  qsort (base, n, size, cmp);
}

OCTAVE_API char *
oct_strptime (const char *buf, const char *format, struct tm *tm)
{
  return (char *) strptime (buf, format, tm);
}

#if defined (__WIN32__) && ! defined (_POSIX_VERSION)

#include <winsock.h>

#elif ! defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H)

#include <sys/utsname.h>

int
gethostname (char *name, int namelen)
{
  int i;
  struct utsname ut;

  --namelen;

  uname (&ut);
  i = strlen (ut.nodename) + 1;
  strncpy (name, ut.nodename, i < namelen ? i : namelen);
  name[namelen] = '\0';

  return 0;
}

#endif

OCTAVE_API int
octave_strcasecmp (const char *s1, const char *s2)
{
  return strcasecmp (s1, s2);
}

OCTAVE_API int
octave_strncasecmp (const char *s1, const char *s2, size_t n)
{
  return strncasecmp (s1, s2, n);
}

OCTAVE_API int
octave_gethostname (char *name, int namelen)
{
  return gethostname (name, namelen);
}

#ifdef HAVE_LOADLIBRARY_API
#include <windows.h>

/* Need this since in C++ can't cast from int(*)() to void* */
OCTAVE_API void *
octave_w32_library_search (HINSTANCE handle, const char * name)
{
  return (GetProcAddress (handle, name));
}
#endif

OCTAVE_API pid_t
octave_waitpid (pid_t pid, int *status, int options)
{
  return WAITPID (pid, status, options);
}

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