getservbyport_r: fix wrong result if getnameinfo fails with EAI_OVERFLOW

[musl] / src / math / rint.c

diff --git a/src/math/rint.c b/src/math/rint.c
index 81f4e62..fbba390 100644 (file)
--- a/src/math/rint.c
+++ b/src/math/rint.c
@@ -1,6 +1,14 @@
+#include <float.h>
 #include <math.h>
 #include <stdint.h>
 
+#if FLT_EVAL_METHOD==0 || FLT_EVAL_METHOD==1
+#define EPS DBL_EPSILON
+#elif FLT_EVAL_METHOD==2
+#define EPS LDBL_EPSILON
+#endif
+static const double_t toint = 1/EPS;
+
 double rint(double x)
 {
        union {double f; uint64_t i;} u = {x};
@@ -11,9 +19,9 @@ double rint(double x)
        if (e >= 0x3ff+52)
                return x;
        if (s)
-               y = (double)(x - 0x1p52) + 0x1p52;
+               y = x - toint + toint;
        else
-               y = (double)(x + 0x1p52) - 0x1p52;
+               y = x + toint - toint;
        if (y == 0)
                return s ? -0.0 : 0;
        return y;