mirror of
https://github.com/torvalds/linux
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7ab04ea0e3
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>
87 lines
1.6 KiB
Text
87 lines
1.6 KiB
Text
/// Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element
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///
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//# This makes an effort to find cases where ARRAY_SIZE can be used such as
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//# where there is a division of sizeof the array by the sizeof its first
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//# element or by any indexed element or the element type. It replaces the
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//# division of the two sizeofs by ARRAY_SIZE.
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//
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// Confidence: High
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// Copyright: (C) 2014 Himangi Saraogi. GPLv2.
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// Comments:
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// Options: --no-includes --include-headers
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virtual patch
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virtual context
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virtual org
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virtual report
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@i@
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@@
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#include <linux/kernel.h>
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//----------------------------------------------------------
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// For context mode
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//----------------------------------------------------------
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@depends on i&&context@
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type T;
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T[] E;
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@@
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(
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* (sizeof(E)/sizeof(*E))
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* (sizeof(E)/sizeof(E[...]))
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* (sizeof(E)/sizeof(T))
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)
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//----------------------------------------------------------
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// For patch mode
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//----------------------------------------------------------
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@depends on i&&patch@
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type T;
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T[] E;
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@@
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(
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- (sizeof(E)/sizeof(*E))
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+ ARRAY_SIZE(E)
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- (sizeof(E)/sizeof(E[...]))
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+ ARRAY_SIZE(E)
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- (sizeof(E)/sizeof(T))
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+ ARRAY_SIZE(E)
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)
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//----------------------------------------------------------
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// For org and report mode
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//----------------------------------------------------------
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@r@
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type T;
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T[] E;
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position p;
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@@
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(
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(sizeof(E)@p /sizeof(*E))
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(sizeof(E)@p /sizeof(E[...]))
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(sizeof(E)@p /sizeof(T))
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)
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@script:python depends on i&&org@
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p << r.p;
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@@
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coccilib.org.print_todo(p[0], "WARNING should use ARRAY_SIZE")
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@script:python depends on i&&report@
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p << r.p;
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@@
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msg="WARNING: Use ARRAY_SIZE"
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coccilib.report.print_report(p[0], msg)
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