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

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* libguile/numbers.c (double_is_non_negative_zero): Remove.
  (idbl2str, scm_max, scm_min, scm_angle, log_of_shifted_double,
  scm_log10): Use 'copysign' to check signs of zeroes,
  instead of 'double_is_non_negative_zero'.
This commit is contained in:
Mark H Weaver 2013-08-06 16:21:26 -04:00
parent 8ba5674805
commit e1592f8a40
1 changed files with 10 additions and 18 deletions
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28
libguile/numbers.c
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@ -654,14 +654,6 @@ scm_i_fraction2double (SCM z)
SCM_FRACTION_DENOMINATOR (z));
}
static int
double_is_non_negative_zero (double x)
{
static double zero = 0.0;
return !memcmp (&x, &zero, sizeof(double));
}
static SCM
scm_i_from_double (double val)
{
@ -5368,7 +5360,7 @@ idbl2str (double dbl, char *a, int radix)
}
else if (dbl == 0.0)
{
if (!double_is_non_negative_zero (dbl))
if (copysign (1.0, dbl) < 0.0)
a[ch++] = '-';
strcpy (a + ch, "0.0");
return ch + 3;
@ -7272,10 +7264,10 @@ scm_max (SCM x, SCM y)
else if (SCM_UNLIKELY (xx != yy))
return (xx != xx) ? x : y; /* Return the NaN */
/* xx == yy, but handle signed zeroes properly */
else if (double_is_non_negative_zero (yy))
return y;
else
else if (copysign (1.0, yy) < 0.0)
return x;
else
return y;
}
else if (SCM_FRACTIONP (y))
{
@ -7431,10 +7423,10 @@ scm_min (SCM x, SCM y)
else if (SCM_UNLIKELY (xx != yy))
return (xx != xx) ? x : y; /* Return the NaN */
/* xx == yy, but handle signed zeroes properly */
else if (double_is_non_negative_zero (xx))
return y;
else
else if (copysign (1.0, xx) < 0.0)
return x;
else
return y;
}
else if (SCM_FRACTIONP (y))
{
@ -9295,7 +9287,7 @@ SCM_PRIMITIVE_GENERIC (scm_angle, "angle", 1, 0, 0,
else if (SCM_REALP (z))
{
double x = SCM_REAL_VALUE (z);
if (x > 0.0 || double_is_non_negative_zero (x))
if (copysign (1.0, x) > 0.0)
return flo0;
else
return scm_i_from_double (atan2 (0.0, -1.0));
@ -9945,7 +9937,7 @@ log_of_shifted_double (double x, long shift)
{
double ans = log (fabs (x)) + shift * M_LN2;
if (x > 0.0 || double_is_non_negative_zero (x))
if (copysign (1.0, x) > 0.0)
return scm_i_from_double (ans);
else
return scm_c_make_rectangular (ans, M_PI);
@ -10061,7 +10053,7 @@ SCM_PRIMITIVE_GENERIC (scm_log10, "log10", 1, 0, 0,
{
double re = scm_to_double (z);
double l = log10 (fabs (re));
if (re > 0.0 || double_is_non_negative_zero (re))
if (copysign (1.0, re) > 0.0)
return scm_i_from_double (l);
else
return scm_c_make_rectangular (l, M_LOG10E * M_PI);