For conversion of decompiled Unity il2cpp.h header file to Ghidra compatible format

il2cpp.h-for-ghidra.sh

#!/bin/bash
# Originally written by https://github.com/therealchjones
# Original Source: https://github.com/Perfare/Il2CppDumper/issues/287#issuecomment-669544385
# For conversion of decompiled Unity il2cpp.h header file to Ghidra compatible format
DEBUG=y

SOURCEFILE="$1"
NEWFILE="${2:-il2cpp-ghidra.h}"

if [ "$#" -lt 1 ]; then
	echo "Usage: $0 <SOURCE> [TARGET]"
	echo "       Default TARGET is $NEWFILE"
	echo "Example 1: $0 il2cpp.h"
	echo "Example 2: $0 il2cpp.h il2cpp-fixed.h"
	return 1
fi

if [ "$SOURCEFILE" == "$NEWFILE" ]; then
	echo "Error: source and target file cannot be the same!"
	return 1
fi

if [ ! -f "$SOURCEFILE" ]; then
	echo "Error: source file $1 does not exists!"
	return 1
fi

if [ -f "$NEWFILE" ]; then
	echo "Error: target file $2 exists!"
	return 1
fi

STARTTIME=`date '+%s'`
BASENAME=`basename "${0}"`
TMPDIR=`mktemp -d -t "$BASENAME".tmp.XXXXXX`
if [ "$?" -ne "0" ]; then
	echo "$BASENAME: Unable to make temporary directory">&2
	echo "TMPDIR='$TMPDIR'">&2
	echo "_CS_DARWIN_USER_TEMP_DIR='$_CS_DARWIN_USER_TEMP_DIR'">&2
	echo "mktemp: '`which mktemp`'">&2
	return 1
fi
SEDFILE=`mktemp "$TMPDIR"/"$BASENAME".sed.XXXXXX`
TEMPFILE=`mktemp "$TMPDIR"/"$BASENAME".tmp.XXXXXX`
TEMPFILE2=`mktemp "$TMPDIR"/"$BASENAME".tmp.XXXXXX`

TYPEDEFS='
typedef int intptr_t;
typedef uint uintptr_t;
typedef uchar uint8_t;
typedef char int8_t;
typedef short int16_t;
typedef ushort uint16_t;
typedef int int32_t;
typedef uint uint32_t;
typedef longlong int64_t;
typedef ulonglong uint64_t;
'
# see https://github.com/Perfare/Il2CppDumper/issues/287

if [ "$DEBUG" == "y" ]; then
	exec 3>&1
	DEBUG=/dev/fd/3
else
	DEBUG=/dev/null;
fi

I=0
DERIVATIVES=`grep ':' "$SOURCEFILE"`
NUMDERIVATIVE=`echo "$DERIVATIVES" | wc -l | \
		sed -E -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//'`
while [ "$NUMDERIVATIVE" -gt "0" ]; do
	echo "Derivative classes remaining: $NUMDERIVATIVE" >$DEBUG
	I=$(( $I + 1 ))
	echo "Starting pass $I" > $DEBUG
	cat /dev/null > "$SEDFILE"
	CLASSESPROCESSED=0;
	INHERITEDS=`echo "$DERIVATIVES" | cut -f2 -d':' | \
		sed -E -e 's/[[:space:]]*\{?[[:space:]]*$//' \
			-e 's/^[[:space:]]*//' | sort -u`
	NUMINHERITED=`echo "$INHERITEDS" | wc -l | \
		sed -E -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//'`
	echo "Inherited classes to process: $NUMINHERITED" >$DEBUG

	echo "$INHERITEDS" | while read CLASS; do
		echo -n "Processing $CLASS: " >"$DEBUG"
		if grep -q -E '^(struct|typedef|union)[[:space:]]+'"$CLASS"'[[:space:]]*\{[[:space:]]*$' "$SOURCEFILE"; then
			echo -n "base, will replace... " >"$DEBUG"
			REPLACEMENT=`sed -n -E '/^(struct|typedef|union)[[:space:]]+'"$CLASS"'[[:space:]]*\{[[:space:]]*$/,/^\};/p' "$SOURCEFILE" | \
				sed -E -e 's/^(struct|typedef|union)[[:space:]]+'"$CLASS"'[[:space:]]*//' -e '/^\};[[:space:]]*$/d'`
			echo 's/:[[:space:]]*'"$CLASS"'[[:space:]]*\{[[:space:]]*$/'"$REPLACEMENT"'/' | sed -E 's/([^/])$/\1\\/' >> "$SEDFILE"
		fi
		CLASSESPROCESSED=$(( $CLASSESPROCESSED + 1 ))
		echo "done. $CLASSESPROCESSED/$NUMINHERITED ($(( $CLASSESPROCESSED*100/$NUMINHERITED ))%)" > $DEBUG
	done
	echo -n "Modifying source... " > "$DEBUG"
	sed -E -f "$SEDFILE" "$SOURCEFILE" > "$TEMPFILE"
	cp "$TEMPFILE" "$TEMPFILE2"
	SOURCEFILE="$TEMPFILE2"
	echo "done.">"$DEBUG"

	echo "Checking result: ">"$DEBUG"
	DERIVATIVES=`grep ':' "$SOURCEFILE"`
	if [ -n "$DERIVATIVES" ]; then
		NUMDERIVATIVE=`echo "$DERIVATIVES" | wc -l | \
			sed -E -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//'`
	else
		NUMDERIVATIVE=0
	fi
done

echo "Completed processing after $I passes." >"$DEBUG"
echo -n "Writing new header file... ">"$DEBUG"
echo "$TYPEDEFS" > "$NEWFILE"
cat "$SOURCEFILE" >> "$NEWFILE"
echo "done." >"$DEBUG"
echo -n "Cleaning up... ">"$DEBUG"
rm -rf "$TMPDIR"
echo "done." >"$DEBUG"
NOWTIME=`date '+%s'`
echo 'Time elapsed: approximately '"$(( $NOWTIME - $STARTTIME ))"' seconds.' >"$DEBUG"
echo "Done." > "$DEBUG"
return 0;