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b3fd7b53ff
Coccinelle needs a custom isomorphism file with rules (isomorphisms) how
to correctly rewrite conditions with explicit NULL checks (i.e.
if (ptr == NULL)) to their shorter form (i.e. if (!ptr)). Coccinelle
already contains such isomorphisms in its default .iso file, however,
they're in the opposite direction, which results in useless output from
coccinelle/equals-null.cocci.
With this fix, `spatch` should no longer report patches like:
@@ -628,8 +628,9 @@ static int path_deserialize_item(Unit *u
f = path_result_from_string(value);
if (f < 0)
log_unit_debug(u, "Failed to parse result value: %s", value);
- else if (f != PATH_SUCCESS)
- p->result = f;
+ else {if (f != PATH_SUCCESS)
+ p->result = f;
+ }
} else
log_unit_debug(u, "Unknown serialization key: %s", key);
21 lines
466 B
Plaintext
21 lines
466 B
Plaintext
/* Statement isomorphisms - replace explicit checks against NULL with a
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* shorter variant, which relies on C's downgrade-to-bool feature.
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* The expression metavariables should be declared as pointers, however,
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* that doesn't work well with complex expressions like:
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* if (UNIT(p)->default_dependencies != NULL)
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*/
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Statement
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@@
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expression X;
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statement S;
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@@
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if (X == NULL) S => if (!X) S
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Statement
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@@
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expression X;
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statement S;
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@@
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if (X != NULL) S => if (X) S
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