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diff --git a/src/floatfns.c b/src/floatfns.c
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-/* Primitive operations on floating point for GNU Emacs Lisp interpreter.
- Copyright (C) 1988 Free Software Foundation, Inc.
-
-This file is part of GNU Emacs.
-
-GNU Emacs 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 1, or (at your option)
-any later version.
-
-GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
-#include <signal.h>
-
-#include "config.h"
-#include "lisp.h"
-
-Lisp_Object Qarith_error;
-
-#ifdef LISP_FLOAT_TYPE
-#include <math.h>
-
-/* Nonzero while executing in floating point.
- This tells float_error what to do. */
-
-static int in_float;
-
-/* If an argument is out of range for a mathematical function,
- that is detected with a signal. Here is the actual argument
- value to use in the error message. */
-
-static Lisp_Object float_error_arg;
-
-#define IN_FLOAT(d, num) \
-(in_float = 1, float_error_arg = num, (d), in_float = 0)
-
-/* Extract a Lisp number as a `double', or signal an error. */
-
-double
-extract_float (num)
- Lisp_Object num;
-{
- CHECK_NUMBER_OR_FLOAT (num, 0);
-
- if (XTYPE (num) == Lisp_Float)
- return XFLOAT (num)->data;
- return (double) XINT (num);
-}
-
-DEFUN ("acos", Facos, Sacos, 1, 1, 0,
- "Return the inverse cosine of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = acos (d), num);
- return make_float (d);
-}
-
-DEFUN ("acosh", Facosh, Sacosh, 1, 1, 0,
- "Return the inverse hyperbolic cosine of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = acosh (d), num);
- return make_float (d);
-}
-
-DEFUN ("asin", Fasin, Sasin, 1, 1, 0,
- "Return the inverse sine of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = asin (d), num);
- return make_float (d);
-}
-
-DEFUN ("asinh", Fasinh, Sasinh, 1, 1, 0,
- "Return the inverse hyperbolic sine of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = asinh (d), num);
- return make_float (d);
-}
-
-DEFUN ("atan", Fatan, Satan, 1, 1, 0,
- "Return the inverse tangent of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = atan (d), num);
- return make_float (d);
-}
-
-DEFUN ("atanh", Fatanh, Satanh, 1, 1, 0,
- "Return the inverse hyperbolic tangent of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = atanh (d), num);
- return make_float (d);
-}
-
-DEFUN ("bessel-j0", Fbessel_j0, Sbessel_j0, 1, 1, 0,
- "Return the bessel function j0 of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = j0 (d), num);
- return make_float (d);
-}
-
-DEFUN ("bessel-j1", Fbessel_j1, Sbessel_j1, 1, 1, 0,
- "Return the bessel function j1 of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = j1 (d), num);
- return make_float (d);
-}
-
-DEFUN ("bessel-jn", Fbessel_jn, Sbessel_jn, 2, 2, 0,
- "Return the order N bessel function output jn of ARG.\n\
-The first arg (the order) is truncated to an integer.")
- (num1, num2)
- register Lisp_Object num1, num2;
-{
- int i1 = extract_float (num1);
- double f2 = extract_float (num2);
-
- IN_FLOAT (f2 = jn (i1, f2), num1);
- return make_float (f2);
-}
-
-DEFUN ("bessel-y0", Fbessel_y0, Sbessel_y0, 1, 1, 0,
- "Return the bessel function y0 of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = y0 (d), num);
- return make_float (d);
-}
-
-DEFUN ("bessel-y1", Fbessel_y1, Sbessel_y1, 1, 1, 0,
- "Return the bessel function y1 of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = y1 (d), num);
- return make_float (d);
-}
-
-DEFUN ("bessel-yn", Fbessel_yn, Sbessel_yn, 2, 2, 0,
- "Return the order N bessel function output yn of ARG.\n\
-The first arg (the order) is truncated to an integer.")
- (num1, num2)
- register Lisp_Object num1, num2;
-{
- int i1 = extract_float (num1);
- double f2 = extract_float (num2);
-
- IN_FLOAT (f2 = yn (i1, f2), num1);
- return make_float (f2);
-}
-
-DEFUN ("cube-root", Fcube_root, Scube_root, 1, 1, 0,
- "Return the cube root of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = cbrt (d), num);
- return make_float (d);
-}
-
-DEFUN ("cos", Fcos, Scos, 1, 1, 0,
- "Return the cosine of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = cos (d), num);
- return make_float (d);
-}
-
-DEFUN ("cosh", Fcosh, Scosh, 1, 1, 0,
- "Return the hyperbolic cosine of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = cosh (d), num);
- return make_float (d);
-}
-
-DEFUN ("erf", Ferf, Serf, 1, 1, 0,
- "Return the mathematical error function of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = erf (d), num);
- return make_float (d);
-}
-
-DEFUN ("erfc", Ferfc, Serfc, 1, 1, 0,
- "Return the complementary error function of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = erfc (d), num);
- return make_float (d);
-}
-
-DEFUN ("exp", Fexp, Sexp, 1, 1, 0,
- "Return the exponential base e of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = exp (d), num);
- return make_float (d);
-}
-
-DEFUN ("expm1", Fexpm1, Sexpm1, 1, 1, 0,
- "Return the exp (x)-1 of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = expm1 (d), num);
- return make_float (d);
-}
-
-DEFUN ("log-gamma", Flog_gamma, Slog_gamma, 1, 1, 0,
- "Return the log gamma of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = lgamma (d), num);
- return make_float (d);
-}
-
-DEFUN ("log", Flog, Slog, 1, 1, 0,
- "Return the natural logarithm of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = log (d), num);
- return make_float (d);
-}
-
-DEFUN ("log10", Flog10, Slog10, 1, 1, 0,
- "Return the logarithm base 10 of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = log10 (d), num);
- return make_float (d);
-}
-
-DEFUN ("log1p", Flog1p, Slog1p, 1, 1, 0,
- "Return the log (1+x) of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = log1p (d), num);
- return make_float (d);
-}
-
-DEFUN ("expt", Fexpt, Sexpt, 2, 2, 0,
- "Return the exponential x ** y.")
- (num1, num2)
- register Lisp_Object num1, num2;
-{
- double f1, f2;
-
- CHECK_NUMBER_OR_FLOAT (num1, 0);
- CHECK_NUMBER_OR_FLOAT (num2, 0);
- if ((XTYPE (num1) == Lisp_Int) && /* common lisp spec */
- (XTYPE (num2) == Lisp_Int)) /* don't promote, if both are ints */
- { /* this can be improved by pre-calculating */
- int acc, x, y; /* some binary powers of x then acumulating */
- /* these, therby saving some time. -wsr */
- x = XINT (num1);
- y = XINT (num2);
- acc = 1;
-
- if (y < 0)
- {
- for (; y < 0; y++)
- acc /= x;
- }
- else
- {
- for (; y > 0; y--)
- acc *= x;
- }
- return XSET (x, Lisp_Int, acc);
- }
- f1 = (XTYPE (num1) == Lisp_Float) ? XFLOAT (num1)->data : XINT (num1);
- f2 = (XTYPE (num2) == Lisp_Float) ? XFLOAT (num2)->data : XINT (num2);
- IN_FLOAT (f1 = pow (f1, f2), num1);
- return make_float (f1);
-}
-
-DEFUN ("sin", Fsin, Ssin, 1, 1, 0,
- "Return the sine of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = sin (d), num);
- return make_float (d);
-}
-
-DEFUN ("sinh", Fsinh, Ssinh, 1, 1, 0,
- "Return the hyperbolic sine of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = sinh (d), num);
- return make_float (d);
-}
-
-DEFUN ("sqrt", Fsqrt, Ssqrt, 1, 1, 0,
- "Return the square root of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = sqrt (d), num);
- return make_float (d);
-}
-
-DEFUN ("tan", Ftan, Stan, 1, 1, 0,
- "Return the tangent of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = tan (d), num);
- return make_float (d);
-}
-
-DEFUN ("tanh", Ftanh, Stanh, 1, 1, 0,
- "Return the hyperbolic tangent of ARG.")
- (num)
- register Lisp_Object num;
-{
- double d = extract_float (num);
- IN_FLOAT (d = tanh (d), num);
- return make_float (d);
-}
-
-DEFUN ("abs", Fabs, Sabs, 1, 1, 0,
- "Return the absolute value of ARG.")
- (num)
- register Lisp_Object num;
-{
- CHECK_NUMBER_OR_FLOAT (num, 0);
-
- if (XTYPE (num) == Lisp_Float)
- IN_FLOAT (num = make_float (fabs (XFLOAT (num)->data)), num);
- else if (XINT (num) < 0)
- XSETINT (num, - XFASTINT (num));
-
- return num;
-}
-
-DEFUN ("float", Ffloat, Sfloat, 1, 1, 0,
- "Return the floating point number equal to ARG.")
- (num)
- register Lisp_Object num;
-{
- CHECK_NUMBER_OR_FLOAT (num, 0);
-
- if (XTYPE (num) == Lisp_Int)
- return make_float ((double) XINT (num));
- else /* give 'em the same float back */
- return num;
-}
-
-DEFUN ("logb", Flogb, Slogb, 1, 1, 0,
- "Returns the integer that is the base 2 log of ARG.\n\
-This is the same as the exponent of a float.")
- (num)
-Lisp_Object num;
-{
- Lisp_Object val;
- double f;
-
- CHECK_NUMBER_OR_FLOAT (num, 0);
- f = (XTYPE (num) == Lisp_Float) ? XFLOAT (num)->data : XINT (num);
- IN_FLOAT (val = logb (f), num);
- XSET (val, Lisp_Int, val);
- return val;
-}
-
-/* the rounding functions */
-
-DEFUN ("ceiling", Fceiling, Sceiling, 1, 1, 0,
- "Return the smallest integer no less than ARG. (Round toward +inf.)")
- (num)
- register Lisp_Object num;
-{
- CHECK_NUMBER_OR_FLOAT (num, 0);
-
- if (XTYPE (num) == Lisp_Float)
- IN_FLOAT (XSET (num, Lisp_Int, ceil (XFLOAT (num)->data)), num);
-
- return num;
-}
-
-DEFUN ("floor", Ffloor, Sfloor, 1, 1, 0,
- "Return the largest integer no greater than ARG. (Round towards -inf.)")
- (num)
- register Lisp_Object num;
-{
- CHECK_NUMBER_OR_FLOAT (num, 0);
-
- if (XTYPE (num) == Lisp_Float)
- IN_FLOAT (XSET (num, Lisp_Int, floor (XFLOAT (num)->data)), num);
-
- return num;
-}
-
-DEFUN ("round", Fround, Sround, 1, 1, 0,
- "Return the nearest integer to ARG.")
- (num)
- register Lisp_Object num;
-{
- CHECK_NUMBER_OR_FLOAT (num, 0);
-
- if (XTYPE (num) == Lisp_Float)
- IN_FLOAT (XSET (num, Lisp_Int, rint (XFLOAT (num)->data)), num);
-
- return num;
-}
-
-DEFUN ("truncate", Ftruncate, Struncate, 1, 1, 0,
- "Truncate a floating point number to an int.\n\
-Rounds the value toward zero.")
- (num)
- register Lisp_Object num;
-{
- CHECK_NUMBER_OR_FLOAT (num, 0);
-
- if (XTYPE (num) == Lisp_Float)
- XSET (num, Lisp_Int, (int) XFLOAT (num)->data);
-
- return num;
-}
-
-#ifdef BSD
-static
-float_error (signo)
- int signo;
-{
- if (! in_float)
- fatal_error_signal (signo);
-
-#ifdef BSD4_1
- sigrelse (SIGILL);
-#else /* not BSD4_1 */
- sigsetmask (0);
-#endif /* not BSD4_1 */
-
- in_float = 0;
-
- Fsignal (Qarith_error, Fcons (float_error_arg, Qnil));
-}
-
-/* Another idea was to replace the library function `infnan'
- where SIGILL is signaled. */
-
-#endif /* BSD */
-
-init_floatfns ()
-{
- signal (SIGILL, float_error);
- in_float = 0;
-}
-
-syms_of_floatfns ()
-{
- defsubr (&Sacos);
- defsubr (&Sacosh);
- defsubr (&Sasin);
- defsubr (&Sasinh);
- defsubr (&Satan);
- defsubr (&Satanh);
- defsubr (&Sbessel_y0);
- defsubr (&Sbessel_y1);
- defsubr (&Sbessel_yn);
- defsubr (&Sbessel_j0);
- defsubr (&Sbessel_j1);
- defsubr (&Sbessel_jn);
- defsubr (&Scube_root);
- defsubr (&Scos);
- defsubr (&Scosh);
- defsubr (&Serf);
- defsubr (&Serfc);
- defsubr (&Sexp);
- defsubr (&Sexpm1);
- defsubr (&Slog_gamma);
- defsubr (&Slog);
- defsubr (&Slog10);
- defsubr (&Slog1p);
- defsubr (&Sexpt);
- defsubr (&Ssin);
- defsubr (&Ssinh);
- defsubr (&Ssqrt);
- defsubr (&Stan);
- defsubr (&Stanh);
-
- defsubr (&Sabs);
- defsubr (&Sfloat);
- defsubr (&Slogb);
- defsubr (&Sceiling);
- defsubr (&Sfloor);
- defsubr (&Sround);
- defsubr (&Struncate);
-}
-
-#else /* not LISP_FLOAT_TYPE */
-
-init_floatfns ()
-{}
-
-syms_of_floatfns ()
-{}
-
-#endif /* not LISP_FLOAT_TYPE */