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| author | Himangi Saraogi <himangi774@gmail.com> | 2014-06-29 12:46:04 +0530 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2014-08-06 12:10:17 +0200 |
| commit | 7ab04ea0e32cf8cabcbc33cefac36e5f9258734e (patch) | |
| tree | 82f41c8e314b54af5e994463fdf7d00008457c4e /scripts/coccinelle | |
| parent | 99fcec30e882ec214b689889b3599cf98f5c9843 (diff) | |
| download | lwn-7ab04ea0e32cf8cabcbc33cefac36e5f9258734e.tar.gz lwn-7ab04ea0e32cf8cabcbc33cefac36e5f9258734e.zip | |
Coccinelle: Script to use ARRAY_SIZE instead of division of two sizeofs
This script detects cases where ARRAY_SIZE can be used such as
where there is a division of sizeof the array by the sizeof its first
element or by any indexed element or the element type. It replaces the
division of the two sizeofs by ARRAY_SIZE.
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts/coccinelle')
| -rw-r--r-- | scripts/coccinelle/misc/array_size.cocci | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/scripts/coccinelle/misc/array_size.cocci b/scripts/coccinelle/misc/array_size.cocci new file mode 100644 index 000000000000..81e279cd347b --- /dev/null +++ b/scripts/coccinelle/misc/array_size.cocci @@ -0,0 +1,87 @@ +/// Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element +/// +//# This makes an effort to find cases where ARRAY_SIZE can be used such as +//# where there is a division of sizeof the array by the sizeof its first +//# element or by any indexed element or the element type. It replaces the +//# division of the two sizeofs by ARRAY_SIZE. +// +// Confidence: High +// Copyright: (C) 2014 Himangi Saraogi. GPLv2. +// Comments: +// Options: --no-includes --include-headers + +virtual patch +virtual context +virtual org +virtual report + +@i@ +@@ + +#include <linux/kernel.h> + +//---------------------------------------------------------- +// For context mode +//---------------------------------------------------------- + +@depends on i&&context@ +type T; +T[] E; +@@ +( +* (sizeof(E)/sizeof(*E)) +| +* (sizeof(E)/sizeof(E[...])) +| +* (sizeof(E)/sizeof(T)) +) + +//---------------------------------------------------------- +// For patch mode +//---------------------------------------------------------- + +@depends on i&&patch@ +type T; +T[] E; +@@ +( +- (sizeof(E)/sizeof(*E)) ++ ARRAY_SIZE(E) +| +- (sizeof(E)/sizeof(E[...])) ++ ARRAY_SIZE(E) +| +- (sizeof(E)/sizeof(T)) ++ ARRAY_SIZE(E) +) + +//---------------------------------------------------------- +// For org and report mode +//---------------------------------------------------------- + +@r@ +type T; +T[] E; +position p; +@@ +( + (sizeof(E)@p /sizeof(*E)) +| + (sizeof(E)@p /sizeof(E[...])) +| + (sizeof(E)@p /sizeof(T)) +) + +@script:python depends on i&&org@ +p << r.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING should use ARRAY_SIZE") + +@script:python depends on i&&report@ +p << r.p; +@@ + +msg="WARNING: Use ARRAY_SIZE" +coccilib.report.print_report(p[0], msg) + |