Mercurial > hg > octave-lyh
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: *** */