rework langinfo code for ABI compat and for use by time code

[musl] / src / math / log.c

diff --git a/src/math/log.c b/src/math/log.c
index 1bb006a..9805120 100644 (file)
--- a/src/math/log.c
+++ b/src/math/log.c
@@ -74,8 +74,6 @@ Lg5 = 1.818357216161805012e-01,  /* 3FC74664 96CB03DE */
 Lg6 = 1.531383769920937332e-01,  /* 3FC39A09 D078C69F */
 Lg7 = 1.479819860511658591e-01;  /* 3FC2F112 DF3E5244 */
 
-static const double zero = 0.0;
-
 double log(double x)
 {
        double hfsq,f,s,z,R,w,t1,t2,dk;
@@ -87,9 +85,9 @@ double log(double x)
        k = 0;
        if (hx < 0x00100000) {  /* x < 2**-1022  */
                if (((hx&0x7fffffff)|lx) == 0)
-                       return -two54/zero;  /* log(+-0)=-inf */
+                       return -two54/0.0;  /* log(+-0)=-inf */
                if (hx < 0)
-                       return (x-x)/zero;   /* log(-#) = NaN */
+                       return (x-x)/0.0;   /* log(-#) = NaN */
                /* subnormal number, scale up x */
                k -= 54;
                x *= two54;
@@ -104,9 +102,9 @@ double log(double x)
        k += i>>20;
        f = x - 1.0;
        if ((0x000fffff&(2+hx)) < 3) {  /* -2**-20 <= f < 2**-20 */
-               if (f == zero) {
+               if (f == 0.0) {
                        if (k == 0) {
-                               return zero;
+                               return 0.0;
                        }
                        dk = (double)k;
                        return dk*ln2_hi + dk*ln2_lo;