/* Base 10 logarithmic function.
- Copyright (C) 2011-2012 Free Software Foundation, Inc.
+ Copyright (C) 2011-2013 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
float
log10f (float x)
+#undef log10f
{
+#if HAVE_LOG10F
+ if (x <= 0.0f)
+ {
+ /* Work around the OSF/1 5.1 bug. */
+ if (x == 0.0f)
+ /* Return -Infinity. */
+ return -1.0f / 0.0f;
+ /* Work around the NetBSD 5.1 bug. */
+ else /* x < 0.0 */
+ /* Return NaN. */
+ return 0.0f / 0.0f;
+ }
+ return log10f (x);
+#else
return (float) log10 ((double) x);
+#endif
}