source: mainline/tools/autogen2.sh@ d5e5fd1

#!/bin/sh

filename="$1"
struct_name="$2"

members=`cat $filename | sed -n -e "1,/typedef struct $struct_name {/d" -e "/} ${struct_name}_t;/,$$d" -e "s/.* \([^ ]\+\);/\1/p"`

ustruct_name=`echo "$struct_name" | awk '{print toupper($0)}'`
dmembers=`echo "$members" | awk '{print "DEFINE_MEMBER(" $0 ", " toupper($0) ")" }'`

if [ -z "${CC}" ]; then
        CC=cc
fi

if ( ${CC} --version | grep clang > /dev/null ) ; then
        CFLAGS="${CFLAGS} -no-integrated-as"
fi

echo "/* Autogenerated file, do not modify. */"
echo "#pragma once"

( ${CC} ${CFLAGS} -w -S -x c - -o - | sed -n 's/^.* #define \([^ ]\+\) [^0-9]*\([0-9]\+\) .*/#define \1 \2/p' ) <<- EOF

#include "$filename"

#define DEFINE_MEMBER(lc, uc) \
        asm volatile ("/* #define ${ustruct_name}_OFFSET_"#uc" %0 */" :: "i" (__builtin_offsetof(struct $struct_name, lc))); \
        asm volatile ("/* #define ${ustruct_name}_SIZE_"#uc" %0 */" :: "i" (sizeof((struct $struct_name){}.lc)));

void autogen()
{
        $dmembers
}

EOF