systemd/coccinelle/free_and_replace.cocci

@@
expression p, q;
@@
- free(p);
- p = q;
- q = NULL;
- return 0;
+ return free_and_replace(p, q);
@@
expression p, q;
@@
- free(p);
- p = q;
- q = NULL;
+ free_and_replace(p, q);
tree-wide: introduce free_and_replace helper It's a common pattern, so add a helper for it. A macro is necessary because a function that takes a pointer to a pointer would be type specific, similarly to cleanup functions. Seems better to use a macro. 2016-10-16 23:23:35 +00:00			`@@`
			`expression p, q;`
			`@@`
			`- free(p);`
			`- p = q;`
			`- q = NULL;`
			`- return 0;`
			`+ return free_and_replace(p, q);`
			`@@`
			`expression p, q;`
			`@@`
			`- free(p);`
			`- p = q;`
			`- q = NULL;`
			`+ free_and_replace(p, q);`