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#######################################################
#
# constants.py
# Python implementation of resource dump constants
# This file will supply all the constants needed
# for the resource parse tool
# Original author: talve
#
#######################################################

from resourcedump_lib.utils import constants as cs
from argparse import ArgumentTypeError
from pathlib import Path

import sys


def calculate_aligned_offset(offset, size, alignment=32):
    """This method calculate the new offset inside the dword
    since the data inside has a different bit index
    """
    return (int(offset / alignment) * alignment) + alignment - size - (offset % alignment) if size < alignment else offset


def is_resource_segment(seg_type):
    """This method check if the seg type is resource segment
    """
    return cs.RESOURCE_DUMP_SEGMENT_TYPE_RESOURCE_MAX >= seg_type >= cs.RESOURCE_DUMP_SEGMENT_TYPE_RESOURCE_MIN


def valid_path_arg_type(path_str):
    p = Path(path_str)
    if p.is_file():
        return path_str
    raise ArgumentTypeError("invalid file: {}".format(path_str))


def reverse_string_endian(s):
    """This method converts list of chars stored as BE numbers to LE string."""
    len_4_mul = len(s) // 4 * 4
    s = [reversed(s[i:i + 4]) for i in range(0, len_4_mul, 4)]
    if (len(s) % 4 != 0):
        s.append(reversed(s[len_4_mul, 4:len(s)]))
    s = bytes([item for word in s for item in word])
    return s