#!env python

"""
Convert a file to a c array
bin2carray <output file> <input file>
"""

import os
import os.path
import sys

def main():
    """
    Main script function
    """
    if len(sys.argv) < 3:
        return -1

    source_file = sys.argv[2]
    dest_file = sys.argv[1]

    print(f'{source_file} --> {dest_file}')

    with open(source_file, 'rb') as src:
        data = src.read()

    with open(dest_file, 'w', encoding='utf-8') as dest:
        header_guard = '_' + os.path.basename(dest_file).replace('.', '_').replace('-', '_') + '_H_'
        header_guard = header_guard.upper()
        dest.write(f'#ifndef {header_guard}\n')
        dest.write(f'#define {header_guard}\n')
        dest.write(f'static const char binary_blob[{len(data)}] = {{\n')
        for idx, current in enumerate(data, start=1):
            if idx % 4 == 0:
                dest.write(hex(current)+',\n')
            else:
                dest.write(hex(current)+',')

        dest.write('};\n')
        dest.write(f'#endif /* {header_guard} */\n')

    return 0

if __name__ == '__main__':
    sys.exit(main())