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(_GNU_SOURCE): #define, to get C99 things.

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(scm_asinh, scm_acosh, scm_atanh, scm_truncate, $asinh, $acosh,
$atanh, truncate): Use C library asinh, acosh, atanh and trunc, when
available.
(scm_inexact_to_exact): Expand isfinite to its definition !isinf.
(isfinite): Remove, conflicts with C99 isfinite().
This commit is contained in:
Kevin Ryde 2003-06-21 00:12:51 +00:00
parent 02d7253661
commit fa60559018
1 changed files with 40 additions and 18 deletions
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58
libguile/numbers.c
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@ -39,6 +39,9 @@
*/
/* tell glibc (2.3) to give prototype for C99 trunc() */
#define _GNU_SOURCE
#if HAVE_CONFIG_H
# include <config.h>
#endif
@ -263,8 +266,6 @@ xisnan (double x)
#endif
}
#define isfinite(x) (! xisinf (x))
SCM_DEFINE (scm_inf_p, "inf?", 1, 0, 0,
(SCM n),
"Return @code{#t} if @var{n} is infinite, @code{#f}\n"
@ -3643,46 +3644,67 @@ scm_divide (SCM x, SCM y)
}
#undef FUNC_NAME
SCM_GPROC1 (s_asinh, "$asinh", scm_tc7_dsubr, (SCM (*)()) scm_asinh, g_asinh);
/* "Return the inverse hyperbolic sine of @var{x}."
*/
double
scm_asinh (double x)
{
#if HAVE_ASINH
return asinh (x);
#else
#define asinh scm_asinh
return log (x + sqrt (x * x + 1));
#endif
}
SCM_GPROC1 (s_acosh, "$acosh", scm_tc7_dsubr, (SCM (*)()) scm_acosh, g_acosh);
/* "Return the inverse hyperbolic cosine of @var{x}."
SCM_GPROC1 (s_asinh, "$asinh", scm_tc7_dsubr, (SCM (*)()) asinh, g_asinh);
/* "Return the inverse hyperbolic sine of @var{x}."
*/
double
scm_acosh (double x)
{
#if HAVE_ACOSH
return acosh (x);
#else
#define acosh scm_acosh
return log (x + sqrt (x * x - 1));
#endif
}
SCM_GPROC1 (s_atanh, "$atanh", scm_tc7_dsubr, (SCM (*)()) scm_atanh, g_atanh);
/* "Return the inverse hyperbolic tangent of @var{x}."
SCM_GPROC1 (s_acosh, "$acosh", scm_tc7_dsubr, (SCM (*)()) acosh, g_acosh);
/* "Return the inverse hyperbolic cosine of @var{x}."
*/
double
scm_atanh (double x)
{
#if HAVE_ATANH
return atanh (x);
#else
#define atanh scm_atanh
return 0.5 * log ((1 + x) / (1 - x));
#endif
}
SCM_GPROC1 (s_truncate, "truncate", scm_tc7_dsubr, (SCM (*)()) scm_truncate, g_truncate);
/* "Round the inexact number @var{x} towards zero."
SCM_GPROC1 (s_atanh, "$atanh", scm_tc7_dsubr, (SCM (*)()) atanh, g_atanh);
/* "Return the inverse hyperbolic tangent of @var{x}."
*/
double
scm_truncate (double x)
{
#if HAVE_TRUNC
return trunc (x);
#else
#define trunc scm_truncate
if (x < 0.0)
return -floor (-x);
return floor (x);
#endif
}
SCM_GPROC1 (s_truncate, "truncate", scm_tc7_dsubr, (SCM (*)()) trunc, g_truncate);
/* "Round the inexact number @var{x} towards zero."
*/
SCM_GPROC1 (s_round, "round", scm_tc7_dsubr, (SCM (*)()) scm_round, g_round);
@ -3973,7 +3995,7 @@ SCM_DEFINE (scm_inexact_to_exact, "inexact->exact", 1, 0, 0,
long lu = (long) u;
if (SCM_FIXABLE (lu)) {
return SCM_MAKINUM (lu);
} else if (isfinite (u) && !xisnan (u)) {
} else if (!xisinf (u) && !xisnan (u)) {
return scm_i_dbl2big (u);
} else {
scm_num_overflow (s_scm_inexact_to_exact);