Mercurial > cpython-lru_cache-weakref

diff Python/pymath.c @ 53227:96d82facd890 legacy-trunk

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Backport r71704 (add configure check for C99 round function) to trunk.
author Mark Dickinson <dickinsm@gmail.com>
date Sat, 18 Apr 2009 14:41:37 +0000
parents ad5c7eaccea1
children 2ab08c919648
line wrap: on
line diff
--- a/Python/pymath.c	Sat Apr 18 14:13:43 2009 +0000
+++ b/Python/pymath.c	Sat Apr 18 14:41:37 2009 +0000
@@ -47,6 +47,19 @@
 }
 #endif /* HAVE_COPYSIGN */
 
+#ifndef HAVE_ROUND
+double
+round(double x)
+{
+    double absx, y;
+    absx = fabs(x);
+    y = floor(absx);
+    if (absx - y >= 0.5)
+        y += 1.0;
+    return copysign(y, x);
+}
+#endif /* HAVE_ROUND */
+
 #ifndef HAVE_LOG1P
 #include <float.h>