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File Name : array_size.cocci

// SPDX-License-Identifier: GPL-2.0-only
/// 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.
// 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 depends on (org || report)@
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 org@
p << r.p;
@@

coccilib.org.print_todo(p[0], "WARNING should use ARRAY_SIZE")

@script:python depends on report@
p << r.p;
@@

msg="WARNING: Use ARRAY_SIZE"
coccilib.report.print_report(p[0], msg)

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2022-03-28 12:15:32
..	dir	-	root/root	0755	2022-03-28 12:15:31
add_namespace.cocci	text/plain	837 B	root/root	0644	2022-03-07 04:07:14
array_size.cocci	text/x-c	1.69 KB	root/root	0644	2019-11-25 12:32:01
badty.cocci	text/plain	1.69 KB	root/root	0644	2019-11-25 12:32:01
boolconv.cocci	text/plain	1.47 KB	root/root	0644	2019-11-25 12:32:01
boolinit.cocci	text/plain	2.39 KB	root/root	0644	2019-11-25 12:32:01
boolreturn.cocci	text/plain	698 B	root/root	0644	2019-11-25 12:32:01
bugon.cocci	text/plain	1.48 KB	root/root	0644	2019-11-25 12:32:01
cond_no_effect.cocci	text/plain	2.07 KB	root/root	0644	2019-11-25 12:32:01
cstptr.cocci	text/plain	852 B	root/root	0644	2019-11-25 12:32:01
doubleinit.cocci	text/x-c	1.38 KB	root/root	0644	2019-11-25 12:32:01
ifaddr.cocci	text/plain	684 B	root/root	0644	2019-11-25 12:32:01
ifcol.cocci	text/plain	1.23 KB	root/root	0644	2019-11-25 12:32:01
irqf_oneshot.cocci	text/plain	1.91 KB	root/root	0644	2019-11-25 12:32:01
noderef.cocci	text/plain	1.19 KB	root/root	0644	2019-11-25 12:32:01
of_table.cocci	text/x-c	1.33 KB	root/root	0644	2019-11-25 12:32:01
orplus.cocci	text/plain	1.03 KB	root/root	0644	2019-11-25 12:32:01
returnvar.cocci	text/plain	1.26 KB	root/root	0644	2019-11-25 12:32:01
semicolon.cocci	text/plain	1.07 KB	root/root	0644	2019-11-25 12:32:01
warn.cocci	text/plain	1.65 KB	root/root	0644	2019-11-25 12:32:01

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