[PATCH v2] scripts: add typdef removal tool

[Luis R. Rodriguez]

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@xxxxxxx>
Cc: Joe Perches <joe@xxxxxxxxxxx>
Cc: Nicolas Palix <npalix@xxxxxxx>
Cc: Yoann Padioleau <yoann.padioleau@xxxxxxxxx>
Signed-off-by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
---

 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@xxxxxxxxxxx>
+# Copyright 2009 Luis R. Rodriguez <mcgrof@xxxxxxxxx>
+#
+# 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
+done
-- 
1.6.3.3

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