Mercurial > octave
view liboctave/util/lo-ieee.cc @ 23662:bd77ab816e43
eliminate obsolete file lo-math.h
* lo-math.h: Delete.
* liboctave/util/module.mk: Update.
* configure.ac: Delete check for obsolete file sunmath.h.
* mk-opts.pl: Emit #include <cmath>, not #include "lo-math.h".
Change all uses to include <cmath> instead of "lo-math.h".
author | John W. Eaton <jwe@octave.org> |
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date | Tue, 20 Jun 2017 18:26:15 -0400 |
parents | 0abe8d85ecce |
children | 194eb4bd202b |
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/* Copyright (C) 1996-2017 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 (HAVE_CONFIG_H) # include "config.h" #endif #include <cmath> #include <cstdlib> #include <limits> #include "lo-error.h" #include "lo-ieee.h" #include "mach-info.h" static double lo_inf; static double lo_nan; static double lo_na; static float lo_float_inf; static float lo_float_nan; static float lo_float_na; static int lo_ieee_hw; static int lo_ieee_lw; int __lo_ieee_is_NA (double x) { lo_ieee_double t; t.value = x; return (__lo_ieee_isnan (x) && t.word[lo_ieee_hw] == LO_IEEE_NA_HW && t.word[lo_ieee_lw] == LO_IEEE_NA_LW) ? 1 : 0; } int __lo_ieee_is_old_NA (double x) { lo_ieee_double t; t.value = x; return (__lo_ieee_isnan (x) && t.word[lo_ieee_lw] == LO_IEEE_NA_LW_OLD && t.word[lo_ieee_hw] == LO_IEEE_NA_HW_OLD) ? 1 : 0; } double __lo_ieee_replace_old_NA (double x) { if (__lo_ieee_is_old_NA (x)) return lo_ieee_na_value (); else return x; } double lo_ieee_inf_value (void) { octave_ieee_init (); return lo_inf; } double lo_ieee_na_value (void) { octave_ieee_init (); return lo_na; } double lo_ieee_nan_value (void) { octave_ieee_init (); return lo_nan; } int __lo_ieee_float_is_NA (float x) { lo_ieee_float t; t.value = x; return (__lo_ieee_float_isnan (x) && (t.word == LO_IEEE_NA_FLOAT)) ? 1 : 0; } float lo_ieee_float_inf_value (void) { octave_ieee_init (); return lo_float_inf; } float lo_ieee_float_na_value (void) { octave_ieee_init (); return lo_float_na; } float lo_ieee_float_nan_value (void) { octave_ieee_init (); return lo_float_nan; } void octave_ieee_init (void) { bool initialized = false; if (! initialized) { octave::mach_info::float_format ff = octave::mach_info::native_float_format (); switch (ff) { case octave::mach_info::flt_fmt_ieee_big_endian: case octave::mach_info::flt_fmt_ieee_little_endian: { lo_nan = std::numeric_limits<double>::quiet_NaN (); lo_inf = std::numeric_limits<double>::infinity (); lo_float_nan = std::numeric_limits<float>::quiet_NaN (); lo_float_inf = std::numeric_limits<float>::infinity (); // The following is patterned after code in R. if (ff == octave::mach_info::flt_fmt_ieee_big_endian) { lo_ieee_hw = 0; lo_ieee_lw = 1; } else { lo_ieee_hw = 1; lo_ieee_lw = 0; } lo_ieee_double t; t.word[lo_ieee_hw] = LO_IEEE_NA_HW; t.word[lo_ieee_lw] = LO_IEEE_NA_LW; lo_na = t.value; lo_ieee_float tf; tf.word = LO_IEEE_NA_FLOAT; lo_float_na = tf.value; } break; default: // If the format is unknown, then you will probably not have a // useful system, so we will abort here. Anyone wishing to // experiment with building Octave on a system without IEEE // floating point should be capable of removing this check and // the configure test. // // If the the error handler returns, then we'll abort. (*current_liboctave_error_handler) ("lo_ieee_init: floating point format is not IEEE! Maybe DLAMCH is miscompiled, or you are using some strange system without IEEE floating point math?"); abort (); } initialized = true; } }