"""Utilities for the json_fixes package."""
import re


def extract_char_position(error_message: str) -> int:
    """Extract the character position from the JSONDecodeError message.

    Args:
        error_message (str): The error message from the JSONDecodeError
          exception.

    Returns:
        int: The character position.
    """

    char_pattern = re.compile(r"\(char (\d+)\)")
    if match := char_pattern.search(error_message):
        return int(match[1])
    else:
        raise ValueError("Character position not found in the error message.")