diff options
| -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) + |