Mercurial > hg > octave-terminal
changeset 1967:4cb6aaa0f2c7
[project @ 1996-02-17 02:54:24 by jwe]
Initial revision
author | jwe |
---|---|
date | Sat, 17 Feb 1996 02:54:24 +0000 |
parents | 4b8e9571bbdf |
children | a2e206524aa0 |
files | liboctave/lo-ieee.cc liboctave/lo-ieee.h liboctave/lo-mappers.cc liboctave/lo-mappers.h liboctave/lo-utils.cc liboctave/lo-utils.h |
diffstat | 6 files changed, 640 insertions(+), 0 deletions(-) [+] |
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new file mode 100644 --- /dev/null +++ b/liboctave/lo-ieee.cc @@ -0,0 +1,92 @@ +// lo-ieee.cc -*- C++ -*- +/* + +Copyright (C) 1996 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 2, 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, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <cfloat> + +#if defined (HAVE_FLOATINGPOINT_H) +#include <floatingpoint.h> +#endif + +#include "lo-ieee.h" + +// Octave's idea of infinity. +double octave_Inf; + +// Octave's idea of not a number. +double octave_NaN; + +void +octave_ieee_init (void) +{ +#if defined (HAVE_ISINF) || defined (HAVE_FINITE) + +// Some version of gcc on some old version of Linux used to crash when +// trying to make Inf and NaN. + +#if defined (HAVE_INFINITY) + octave_Inf = (double) infinity (); +#elif defined (linux) + octave_Inf = HUGE_VAL; +#elif defined (__alpha__) + extern unsigned int DINFINITY[2]; + octave_Inf = (*((double *) (DINFINITY))); +#else + double tmp = 1e+10; + octave_Inf = tmp; + for (;;) + { + octave_Inf *= 1e+10; + if (octave_Inf == tmp) + break; + tmp = octave_Inf; + } +#endif + +#endif + +#if defined (HAVE_ISNAN) + +#if defined (HAVE_QUIET_NAN) + octave_NaN = (double) quiet_nan (); +#elif defined (linux) + octave_NaN = NAN; +#elif defined (__alpha__) + extern unsigned int DQNAN[2]; + octave_NaN = (*((double *) (DQNAN))); +#else + octave_NaN = octave_Inf / octave_Inf; +#endif + +#endif +} + +/* +;;; Local Variables: *** +;;; mode: C++ *** +;;; page-delimiter: "^/\\*" *** +;;; End: *** +*/
new file mode 100644 --- /dev/null +++ b/liboctave/lo-ieee.h @@ -0,0 +1,42 @@ +// lo-ieee.h -*- C++ -*- +/* + +Copyright (C) 1996 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 2, 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, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +*/ + +#if !defined (octave_liboctave_ieee_h) +#define octave_liboctave_ieee_h 1 + +// Octave's idea of infinity. +extern double octave_Inf; + +// Octave's idea of not a number. +extern double octave_NaN; + +extern void octave_ieee_init (void); + +#endif + +/* +;;; Local Variables: *** +;;; mode: C++ *** +;;; page-delimiter: "^/\\*" *** +;;; End: *** +*/
new file mode 100644 --- /dev/null +++ b/liboctave/lo-mappers.cc @@ -0,0 +1,342 @@ +// lo-mappers.cc -*- C++ -*- +/* + +Copyright (C) 1996 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 2, 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, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <cfloat> + +#include "lo-error.h" +#include "lo-ieee.h" +#include "lo-mappers.h" +#include "lo-utils.h" +#include "oct-cmplx.h" +#include "oct-math.h" + +#include "f77-fcn.h" + +#if defined (_AIX) && defined (__GNUG__) +#undef finite +#define finite(x) ((x) < DBL_MAX && (x) > -DBL_MAX) +#endif + +extern "C" +{ + double F77_FCN (dgamma, DGAMMA) (const double&); + + int F77_FCN (dlgams, DLGAMS) (const double&, double&, double&); +} + +#ifndef M_LOG10E +#define M_LOG10E 0.43429448190325182765 +#endif + +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +#if defined (HAVE_LGAMMA) && ! defined (SIGNGAM_DECLARED) +extern int signgam; +#endif + +// Double -> double mappers. + +double +arg (double x) +{ + if (x < 0.0) + return M_PI; + else +#if defined (HAVE_ISNAN) + return xisnan (x) ? octave_NaN : 0.0; +#else + return 0.0; +#endif +} + +double +conj (double x) +{ + return x; +} + +double +fix (double x) +{ + int tmp; + tmp = (int) x; + return (double) tmp; +} + +double +imag (double x) +{ +#if defined (HAVE_ISNAN) + return xisnan (x) ? octave_NaN : 0.0; +#else + return 0.0; +#endif +} + +double +real (double x) +{ + return x; +} + +double +round (double x) +{ + return D_NINT (x); +} + +double +signum (double x) +{ + double tmp = 0.0; + if (x < 0.0) + tmp = -1.0; + else if (x > 0.0) + tmp = 1.0; + +#if defined (HAVE_ISNAN) + return xisnan (x) ? octave_NaN : tmp; +#else + return tmp; +#endif +} + +double +xerf (double x) +{ +#if defined (HAVE_ERF) + return erf (x); +#else + (*current_liboctave_error_handler) + ("erf (x) not available on this system"); +#endif +} + +double +xerfc (double x) +{ +#if defined (HAVE_ERFC) + return erfc (x); +#else + (*current_liboctave_error_handler) + ("erfc (x) not available on this system"); +#endif +} + +double +xisnan (double x) +{ +#if defined (HAVE_ISNAN) + return (double) isnan (x); +#else + return 0; +#endif +} + +double +xfinite (double x) +{ +#if defined (HAVE_FINITE) + return (double) finite (x); +#elif defined (HAVE_ISINF) && defined (HAVE_ISNAN) + return (double) (! isinf (x) && ! isnan (x)); +#else + return 1; +#endif +} + +double +xgamma (double x) +{ + return F77_FCN (dgamma, DGAMMA) (x); +} + +double +xisinf (double x) +{ +#if defined (HAVE_ISINF) + return (double) isinf (x); +#elif defined (HAVE_FINITE) && defined (HAVE_ISNAN) + return (double) (! (finite (x) || isnan (x))); +#else + return 0; +#endif +} + +double +xlgamma (double x) +{ + double result; + double sgngam; + + F77_FCN (dlgams, DLGAMS) (x, result, sgngam); + + return result; +} + +// Complex -> double mappers. + +double +xisnan (const Complex& x) +{ +#if defined (HAVE_ISNAN) + double rx = real (x); + double ix = imag (x); + return (double) (isnan (rx) || isnan (ix)); +#else + return 0; +#endif +} + +double +xfinite (const Complex& x) +{ + double rx = real (x); + double ix = imag (x); + return (double) (! ((int) xisinf (rx) || (int) xisinf (ix))); +} + +double +xisinf (const Complex& x) +{ + return (double) (! (int) xfinite (x)); +} + +// Complex -> complex mappers. + +Complex +acos (const Complex& x) +{ + static Complex i (0, 1); + Complex retval = -i * log (x + sqrt (x*x - 1.0)); + return retval; +} + +Complex +acosh (const Complex& x) +{ + Complex retval = log (x + sqrt (x*x - 1.0)); + return retval; +} + +Complex +asin (const Complex& x) +{ + static Complex i (0, 1); + Complex retval = -i * log (i*x + sqrt (1.0 - x*x)); + return retval; +} + +Complex +asinh (const Complex& x) +{ + Complex retval = log (x + sqrt (x*x + 1.0)); + return retval; +} + +Complex +atan (const Complex& x) +{ + static Complex i (0, 1); + Complex retval = i * log ((i + x) / (i - x)) / 2.0; + return retval; +} + +Complex +atanh (const Complex& x) +{ + static Complex i (0, 1); + Complex retval = log ((1 + x) / (1 - x)) / 2.0; + return retval; +} + +Complex +ceil (const Complex& x) +{ + int re = (int) ceil (real (x)); + int im = (int) ceil (imag (x)); + return Complex (re, im); +} + +Complex +fix (const Complex& x) +{ + int re = (int) real (x); + int im = (int) imag (x); + return Complex (re, im); +} + +Complex +floor (const Complex& x) +{ + int re = (int) floor (real (x)); + int im = (int) floor (imag (x)); + return Complex (re, im); +} + +Complex +log10 (const Complex& x) +{ + return M_LOG10E * log (x); +} + +Complex +round (const Complex& x) +{ + double re = D_NINT (real (x)); + double im = D_NINT (imag (x)); + return Complex (re, im); +} + +Complex +signum (const Complex& x) +{ + return x / abs (x); +} + +Complex +tan (const Complex& x) +{ + Complex retval = sin (x) / cos (x); + return retval; +} + +Complex +tanh (const Complex& x) +{ + Complex retval = sinh (x) / cosh (x); + return retval; +} + +/* +;;; Local Variables: *** +;;; mode: C++ *** +;;; page-delimiter: "^/\\*" *** +;;; End: *** +*/
new file mode 100644 --- /dev/null +++ b/liboctave/lo-mappers.h @@ -0,0 +1,66 @@ +// lo-mappers.h -*- C++ -*- +/* + +Copyright (C) 1996 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 2, 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, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +*/ + +#if !defined (octave_liboctave_mappers_h) +#define octave_liboctave_mappers_h 1 + +#include "oct-cmplx.h" + +extern double arg (double x); +extern double conj (double x); +extern double fix (double x); +extern double imag (double x); +extern double real (double x); +extern double round (double x); +extern double signum (double x); +extern double xisnan (double x); +extern double xfinite (double x); +extern double xisinf (double x); + +extern double xisnan (const Complex& x); +extern double xfinite (const Complex& x); +extern double xisinf (const Complex& x); + +extern Complex acos (const Complex& x); +extern Complex acosh (const Complex& x); +extern Complex asin (const Complex& x); +extern Complex asinh (const Complex& x); +extern Complex atan (const Complex& x); +extern Complex atanh (const Complex& x); +extern Complex ceil (const Complex& x); +extern Complex fix (const Complex& x); +extern Complex floor (const Complex& x); +extern Complex log10 (const Complex& x); +extern Complex round (const Complex& x); +extern Complex signum (const Complex& x); +extern Complex tan (const Complex& x); +extern Complex tanh (const Complex& x); + +#endif + +/* +;;; Local Variables: *** +;;; mode: C++ *** +;;; page-delimiter: "^/\\*" *** +;;; End: *** +*/
new file mode 100644 --- /dev/null +++ b/liboctave/lo-utils.cc @@ -0,0 +1,61 @@ +// utils.cc -*- C++ -*- +/* + +Copyright (C) 1996 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 2, 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, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <climits> + +#include "lo-mappers.h" +#include "lo-utils.h" + +// Convert X to the nearest integer value. Should not pass NaN to +// this function. + +int +NINT (double x) +{ + if (x > INT_MAX) + return INT_MAX; + else if (x < INT_MIN) + return INT_MIN; + else + return (x > 0) ? ((int) (x + 0.5)) : ((int) (x - 0.5)); +} + +double +D_NINT (double x) +{ + if (xisinf (x) || xisnan (x)) + return x; + else + return floor (x + 0.5); +} + +/* +;;; Local Variables: *** +;;; mode: C++ *** +;;; page-delimiter: "^/\\*" *** +;;; End: *** +*/
new file mode 100644 --- /dev/null +++ b/liboctave/lo-utils.h @@ -0,0 +1,37 @@ +// lo-utils.h -*- C++ -*- +/* + +Copyright (C) 1996 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 2, 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, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +*/ + +#if !defined (octave_liboctave_utils_h) +#define octave_liboctave_utils_h 1 + +extern int NINT (double x); +extern double D_NINT (double x); + +#endif + +/* +;;; Local Variables: *** +;;; mode: C++ *** +;;; page-delimiter: "^/\\*" *** +;;; End: *** +*/