Python3 Script that takes a file of C variable declarations and produces a C function that prints the variables to std out

generate_print_func.py

import re
import sys

if len(sys.argv) != 3:
    print(f'    usage: {sys.argv[0]:s} <declaration file> <name>')
    sys.exit(0)

array_re = re.compile( "([A-Za-z_ ]+)  +([a-zA-Z0-9_]+)\[([0-9]+)\];?\n" )
value_re = re.compile( "([A-Za-z_ ]+)  +([a-zA-Z0-9_]+);?\n" )

with open(sys.argv[1]) as f:
    file_str = f.read()

arrays = array_re.findall(file_str)
values = value_re.findall(file_str)

types = {'unsigned int' : 'u',
         'int' : 'd',
         'long' : 'ld',
         'long long' : 'lld',
         'unsigned long' : 'lu',
         'unsigned long long' : 'llu',
         'char' : 's',
         'unsigned char' : 'u',
         'size_t' : 'lu',
         'float' : 'f',
         'double' : 'f' }

out_str = f'void print_{sys.argv[2]:s}({sys.argv[2]:s}* p)\n{{\n'

for val_type,val_name in values:
    orig_type = val_type
    new_type = False 
    while val_type not in types.keys():
        new_type = True
        val_type = input('Type \'%s\' unrecognized for value \'%s\'.\nPlease enter a known type:' % (val_type,val_name))
    if new_type:
        types[orig_type] = types[val_type]
    out_str += f'    printf("{val_name:s} : %{types[val_type]:s}\\n", p->{val_name:s});\n'

for arr_type,arr_name,count in arrays:
    orig_type = arr_type
    new_type = False 
    while arr_type not in types.keys():
        new_type = True
        arr_type = input('Type \'%s\' unrecognized for array \'%s\'.\nPlease enter a known type:' % (arr_type,arr_name))
    if new_type:
        types[orig_type] = types[arr_type]
    if types[arr_type] == 's':
        out_str += f'    printf("{arr_name:s} : %s\\n", p->{arr_name:s})\n'
    else:
        out_str += f'    printf("{arr_name:s} : [%{types[arr_type]:s}", p->{arr_name:s}[0]); for(int i = 1; i < {count:s}; ++i ) {{ printf(",%{types[arr_type]:s}", p->{arr_name:s}[i]); }} printf("]\\n");\n'


out_str += '}'

print(out_str)