#!/usr/bin/env python3
import sys
import struct
import re

def convert_txt_to_bin(txt_file, bin_file):
    with open(txt_file, 'r', encoding='utf-8') as f:
        lines = f.readlines()
    
    with open(bin_file, 'wb') as f:
        count = 0
        for line in lines:
            line = line.strip()
            if line == 'start' or line == 'end' or not line:
                continue
            
            # Check if line contains only hex digits (8 characters)
            if re.match(r'^[0-9A-Fa-f]{8}$', line):
                hex_value = line
                # Convert hex string to integer
                int_value = int(hex_value, 16)
                
                count += 1
                # Write first 63 complete 4-byte integers
                if count <= 63:
                    f.write(struct.pack('<I', int_value))
                # For the 64th value, only write the first byte
                elif count == 64:
                    f.write(struct.pack('<I', int_value)[:1])
                    break

if __name__ == "__main__":
    if len(sys.argv) != 3:
        print("Usage: python txt_to_bin_converter.py <input.txt> <output.bin>")
        sys.exit(1)
    
    txt_file = sys.argv[1]
    bin_file = sys.argv[2]
    
    try:
        convert_txt_to_bin(txt_file, bin_file)
        print(f"Successfully converted {txt_file} to {bin_file}")
    except Exception as e:
        print(f"Error: {e}")
        sys.exit(1)