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RIOT/dist/tools/coccinelle/warn/arraysize.cocci
Kees Bakker c1d3128be3 dist/tools: add Coccinelle check for ARRAYSIZE
This Coccinelle script will warn when new code has the potential to use
the macro ARRAYSIZE instead of something like this
     sizeof(some_array) / sizeof(some_array[0])
2019-08-07 21:55:41 +02:00

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// Use the macro ARRAY_SIZE when possible
//
// Confidence: High
// Copyright: (C) Gilles Muller, Julia Lawall, EMN, INRIA, DIKU. GPLv2.
// URL: http://coccinelle.lip6.fr/rules/array.html
// Options: -I ... -all_includes can give more complete results
// This is a modified version for RIOT-OS.
// At first it was used to help with Pull Request 11865
// Now it helps to warn when it is possible to use the macro
// in new code.
@@
type T;
T[] E;
@@
- (sizeof(E)/sizeof(*E))
+ ARRAY_SIZE(E)
@@
type T;
T[] E;
T E2;
@@
- (sizeof(E)/sizeof(E2))
+ ARRAY_SIZE(E)
@@
type T;
T[] E;
@@
- (sizeof(E)/sizeof(E[...]))
+ ARRAY_SIZE(E)
@@
type T;
T[] E;
@@
- (sizeof(E)/sizeof(T))
+ ARRAY_SIZE(E)
@n@
identifier AS,E;
@@
- #define AS(E) ARRAY_SIZE(E)
@@
expression E;
identifier n.AS;
@@
- AS(E)
+ ARRAY_SIZE(E)