Hi tech,
Forwarding this in case it is considered useful.
Trying to clean up xfree() macro in awk.
Remove check for NULL before calling free().
As a side effect, we might set something to NULL which is already NULL (but I
suppose that's ok).
- Michael
Index: awk.h
===================================================================
RCS file: /cvs/src/usr.bin/awk/awk.h,v
retrieving revision 1.13
diff -u -p -u -r1.13 awk.h
--- awk.h 6 Oct 2008 20:38:33 -0000 1.13
+++ awk.h 25 Feb 2015 05:29:37 -0000
@@ -31,7 +31,11 @@ typedef double Awkfloat;
typedef unsigned char uschar;
-#define xfree(a) { if ((a) != NULL) { free((void *) (a)); (a) =
NULL; } }
+#define xfree(a) \
+do { \
+ free((void *)(a)); \
+ (a) = NULL; \
+} while (0)
#define NN(p) ((p) ? (p) : "(null)") /* guaranteed non-null for
dprintf
*/
