linux-kernel - Re: [PATCH v2] scripts: add typdef removal tool

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Message-ID: <20090817060203.GL5039@cr0.nay.redhat.com>
Date:	Mon, 17 Aug 2009 14:02:03 +0800
From:	Amerigo Wang <xiyou.wangcong@...il.com>
To:	"Luis R. Rodriguez" <lrodriguez@...eros.com>
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, mcgrof@...il.com,
	Julia Lawall <julia@...u.dk>, Joe Perches <joe@...ches.com>,
	Nicolas Palix <npalix@...u.dk>,
	Yoann Padioleau <yoann.padioleau@...il.com>
Subject: Re: [PATCH v2] scripts: add typdef removal tool

On Thu, Aug 13, 2009 at 10:39:44PM -0700, Luis R. Rodriguez wrote:
>If you are porting drivers and need to remove tydpefs you can use
>this to help you port the driver faster. Until we don't have a fully
>correct and complete way to do this through Coccinelle spatch we
>might as well help developers porting drivers with something. spatch
>also has a learning curve, people working on staging may not end
>up using it for a while.
>
>Cc: Julia Lawall <julia@...u.dk>
>Cc: Joe Perches <joe@...ches.com>
>Cc: Nicolas Palix <npalix@...u.dk>
>Cc: Yoann Padioleau <yoann.padioleau@...il.com>
>Signed-off-by: Luis R. Rodriguez <lrodriguez@...eros.com>
>---
>
> scripts/remove-typedef |   70 ++++++++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 70 insertions(+), 0 deletions(-)
> create mode 100755 scripts/remove-typedef
>
>diff --git a/scripts/remove-typedef b/scripts/remove-typedef
>new file mode 100755
>index 0000000..17b8034
>--- /dev/null
>+++ b/scripts/remove-typedef
>@@ -0,0 +1,70 @@
>+#!/bin/bash
>+#
>+# Copyright 2009 Joe Perches <joe@...ches.com>
>+# Copyright 2009 Luis R. Rodriguez <mcgrof@...il.com>
>+#
>+# Lets you remove typedefs from C/header files.
>+#
>+# We do simple sed substituation for logical places where you would
>+# use the typedef, and also replace the typedef declaration to a simple
>+# struct declaration.
>+
>+function usage()
>+{
>+	echo "Usage $0 <typedef-name> <struct-name> <paths>"
>+	exit 1
>+}
>+
>+function remove_typedef()
>+{
>+	if [ ! -f $1 ]; then
>+		return;
>+	fi
>+
>+	# This replaces the typedef usages with simple structs
>+	sed -r -i -e "s/\b$from\b/struct $to/g" $1
>+	sed -r -i -e "s/\bP$from\b/struct $to \*/g" $1
>+	sed -r -i -e "s/struct $to\s*\*\s*\b/struct $to \*/g" $1
>+	sed -r -i -e "s/\(struct $to\s*\*\)\s*/\(struct $to \*\)/g" $1
>+
>+	# This replaces the typedef declaration for a simple struct declaration - style 0
>+	perl -i -e "local $/; while(<>) { s/\btypedef\s+struct\s+([\d\D]+?)\s*\{([\d\D]+?)\}\s*struct\s+$to\b[^;]*;/struct $to \{\2\};/g; print; }" $1
>+
>+	# This replaces the typedef declaration for a simple struct declaration - style 1
>+	perl -i -e "local $/; while(<>) { s/\btypedef\s+struct\s+_$from\s*\{([\d\D]+?)\}\s*struct\s+$to\b[^;]*;/struct $to \{\1\};/g; print; }" $1
>+
>+	# This replaces the typedef declaration for a simple struct declaration - style 2
>+	perl -i -e "local $/; while(<>) { s/\btypedef\s+struct\s+$to\s*\{([\d\D]+?)\}\s*$from\b[^;]*;/struct $to \{\1\};/g; print; }" $1
>+
>+}
>+
>+if [[ $# -lt 3 ]]; then
>+	usage
>+fi
>+
>+from=$1
>+to=$2
>+shift
>+
>+echo "Converting typedef $from to struct $to"
>+
>+while shift; do
>+	REM_PATH=$1
>+
>+	if [ -z $REM_PATH ]; then
>+		continue;
>+	fi
>+
>+	if [ ! -d $REM_PATH ]; then
>+		echo "No directory $REM_PATH";
>+		continue;
>+	fi
>+
>+	for i in $(find $REM_PATH -type f -name *.c); do
>+		remove_typedef $i
>+	done
>+
>+	for i in $(find $REM_PATH -type f -name *.h); do
>+		remove_typedef $i
>+	done

These two 'find's can be merged:

  find $REM_PATH -type f -name '*.c' -o -name '*.h'


Thanks.

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