#!/usr/bin/env python
# BlueKitchen GmbH (c) 2018
import sys

usage = '''This script converts a set of configurations and patches in .emp format for EM9304
into C files to be used with BTstack.

Usage:
$ ./convert_emp.py container.emp
'''

header = '''/** 
 * BASENAME.h converted from BASENAME.emp
 */

#ifndef __BASENAME_H
#define __BASENAME_H

#include <stdint.h>
extern const uint8_t  container_blob_data[];
extern const uint32_t container_blob_size;
extern const char *   container_blob_name;

#endif
'''

code_start = '''/** 
 * BASENAME.c converted from BASENAME.bin
 * Size: SIZE bytes 
 */

#include <stdint.h>

const char *   container_blob_name = "BASENAME";

const uint8_t  container_blob_data[] = {
'''

code_end = '''
};
const uint32_t container_blob_size = sizeof(container_blob_data);
'''

def convert_emp(basename):
	emp_name = basename + '.emp'
	print ('Reading %s' % emp_name)

	with open (emp_name, 'rb') as fin:
		firm = fin.read()
		size = len(firm)

		# reduce size by 4 as it ends with four zero bytes that indicate the end of the file
		size -= 4
		print ('Size %u' % size)


		# don't write .h file as we would need to store its name in btstack_chipset_em9301.c, too
		# with open(basename + '.h', 'w') as fout:
		# 	fout.write(header.replace('BASENAME',basename));

		with open(basename + '.c', 'w') as fout:
			fout.write(code_start.replace('BASENAME',basename).replace('SIZE',str(size)));
			fout.write('    ')
			for i in range(0,size):
				if i % 1000 == 0:
					print ('- Write %05u/%05u' % (i, size))
				byte = ord(firm[i])
				fout.write("0x{0:02x}, ".format(byte))
				if (i & 0x0f) == 0x0f:
					fout.write('\n    ')
			fout.write(code_end);
			print ('Done\n') 

# check usage: 1 param
if not len(sys.argv) == 2:
    print(usage)
    sys.exit(1)

name = sys.argv[1]
basename = name.replace('.emp','')
convert_emp(basename)