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Use Gnulib's 'isfinite' in numbers.c.

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* libguile/numbers.c (DOUBLE_IS_FINITE, DOUBLE_IS_POSITIVE_INFINITY,
  DOUBLE_IS_NEGATIVE_INFINITY): Remove.
  (scm_odd_p, scm_even_p, scm_finite_p, icmplx2str, scm_rational_p,
  scm_inexact_to_exact): Use 'isfinite' instead of 'DOUBLE_IS_FINITE'.
This commit is contained in:
Mark H Weaver 2013-08-06 16:26:46 -04:00
parent e1592f8a40
commit 19374ad2de
1 changed files with 6 additions and 15 deletions
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21
libguile/numbers.c
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@ -91,15 +91,6 @@ verify (FLT_RADIX == 2);
typedef scm_t_signed_bits scm_t_inum;
#define scm_from_inum(x) (scm_from_signed_integer (x))
/* Tests to see if a C double is neither infinite nor a NaN.
TODO: if it's available, use C99's isfinite(x) instead */
#define DOUBLE_IS_FINITE(x) (!isinf(x) && !isnan(x))
/* On some platforms, isinf(x) returns 0, 1 or -1, indicating the sign
of the infinity, but other platforms return a boolean only. */
#define DOUBLE_IS_POSITIVE_INFINITY(x) (isinf(x) && ((x) > 0))
#define DOUBLE_IS_NEGATIVE_INFINITY(x) (isinf(x) && ((x) < 0))
/* Test an inum to see if it can be converted to a double without loss
of precision. Note that this will sometimes return 0 even when 1
could have been returned, e.g. for large powers of 2. It is designed
@ -729,7 +720,7 @@ SCM_PRIMITIVE_GENERIC (scm_odd_p, "odd?", 1, 0, 0,
else if (SCM_REALP (n))
{
double val = SCM_REAL_VALUE (n);
if (DOUBLE_IS_FINITE (val))
if (isfinite (val))
{
double rem = fabs (fmod (val, 2.0));
if (rem == 1.0)
@ -763,7 +754,7 @@ SCM_PRIMITIVE_GENERIC (scm_even_p, "even?", 1, 0, 0,
else if (SCM_REALP (n))
{
double val = SCM_REAL_VALUE (n);
if (DOUBLE_IS_FINITE (val))
if (isfinite (val))
{
double rem = fabs (fmod (val, 2.0));
if (rem == 1.0)
@ -783,7 +774,7 @@ SCM_PRIMITIVE_GENERIC (scm_finite_p, "finite?", 1, 0, 0,
#define FUNC_NAME s_scm_finite_p
{
if (SCM_REALP (x))
return scm_from_bool (DOUBLE_IS_FINITE (SCM_REAL_VALUE (x)));
return scm_from_bool (isfinite (SCM_REAL_VALUE (x)));
else if (scm_is_real (x))
return SCM_BOOL_T;
else
@ -5572,7 +5563,7 @@ icmplx2str (double real, double imag, char *str, int radix)
#endif
/* Don't output a '+' for negative numbers or for Inf and
NaN. They will provide their own sign. */
if (sgn >= 0 && DOUBLE_IS_FINITE (imag))
if (sgn >= 0 && isfinite (imag))
str[i++] = '+';
i += idbl2str (imag, &str[i], radix);
str[i++] = 'i';
@ -6512,7 +6503,7 @@ SCM_DEFINE (scm_rational_p, "rational?", 1, 0, 0,
else if (SCM_REALP (x))
/* due to their limited precision, finite floating point numbers are
rational as well. (finite means neither infinity nor a NaN) */
return scm_from_bool (DOUBLE_IS_FINITE (SCM_REAL_VALUE (x)));
return scm_from_bool (isfinite (SCM_REAL_VALUE (x)));
else
return SCM_BOOL_F;
}
@ -9343,7 +9334,7 @@ SCM_PRIMITIVE_GENERIC (scm_inexact_to_exact, "inexact->exact", 1, 0, 0,
else
SCM_WTA_DISPATCH_1 (g_scm_inexact_to_exact, z, 1, s_scm_inexact_to_exact);
if (!SCM_LIKELY (DOUBLE_IS_FINITE (val)))
if (!SCM_LIKELY (isfinite (val)))
SCM_OUT_OF_RANGE (1, z);
else if (val == 0.0)
return SCM_INUM0;