#!/bin/bash

set -e

INPUT_HEADER="/usr/include/linux/input.h"
LOCAL_INPUT_HEADER="linux-input.h"
OUTPUT_MAPH="linux-input-keycodes.h"
OUTPUT_MAPC="linux-input-keycodes.c"
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
#ifndef foolinuxinputkeycodesfoo
#define foolinuxinputkeycodesfoo

/* AUTOGENERATED: DO NOT EDIT */

#include <unistd.h>
#include <stdint.h>
#include <stdbool.h>
#include "$LOCAL_INPUT_HEADER"

struct linux_input_keycode {
	const char *name;
	uint32_t value;
	bool alias;
	void *cairo_surface;
};

extern struct linux_input_keycode linux_input_keycodes[];

#endif
EOF

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

#include "$LOCAL_INPUT_HEADER"
#include "$OUTPUT_MAPH"

struct linux_input_keycode linux_input_keycodes[] = {
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_MAPC"
done

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

exit 0