#!/bin/bash

set -e

INPUT_HEADER="/usr/include/linux/input.h"
LOCAL_INPUT_HEADER="linux-input.h"
OUTPUT_MAPH="linux-input-keycodes.h"
SKIP="KEY_MIN_INTERESTING KEY_MAX KEY_CNT"

if [ ! -e "$LOCAL_INPUT_HEADER" ]; then
	if [ ! -e "$INPUT_HEADER" ]; then
		echo "Can't find input header: $INPUT_HEADER" >&2
		exit 1
	fi

	cp "$INPUT_HEADER" "$LOCAL_INPUT_HEADER"
fi

cat > "$OUTPUT_MAPH" <<EOF
/* AUTOGENERATED: DO NOT EDIT */
EOF

cat "$LOCAL_INPUT_HEADER" | grep "^#define[[:space:]]*KEY_" | while read DEF NAME VALUE COMMENTS; do
	for WORD in $SKIP; do
		if [ "$NAME" = "$WORD" ]; then
			continue
		fi
	done

	if [ "${VALUE##KEY_}" != "$VALUE" ]; then
		ALIAS="true"
	else
		ALIAS="false"
	fi

	echo "	{ \"$NAME\",	$NAME,	$ALIAS,	NULL }," >> "$OUTPUT_MAPH"
done

cat >> "$OUTPUT_MAPH" << EOF
	{ NULL, 0, false, NULL }
EOF

exit 0