Hello Wilfred,

Friday March 12 2021, Wilfred van Velzen wrote to andrew clarke:

 ac>> #define nfree(a) {if(a != NULL) {free(a); a = NULL;}}

 WV> And the test for NULL isn't necessary, because free() is by definition
 WV> doing nothing if the pointer passed to it is NULL.

Yes, I know it. It was written long ago and not by me and I do not change it because I do not know whether free() always worked as it works now or it did not test the pointer for NULL in some ancient systems.

Michael

... node (at) f1042 (dot) ru
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