CRC32 Scan Thingy

readme.md

Readme

Wanna try it out? Point main.py to a directory.

Required:

• wxpython (python 3.11.4 works well with wxpython 4.2.1)

crc32.py

import os, sys, re
import binascii as checksum

def get_crc32(filename):
    crc32 = 0
    binaryfile = open(filename, "rb")
    
    while True:
        chunk = binaryfile.read(1000000)
        if chunk != b"":
            crc32 = checksum.crc32(chunk, crc32)
        else: break
    return "%08X" % crc32

def scan(dir):
    dirlist = os.listdir(dir)
    result = []
    checksum_pattern = "\[[A-F0-9]{8}\]"
    
    for file in dirlist:
        match = re.search(checksum_pattern, file)
        if match:
            crc32 = get_crc32(dir + "\\" + file)
            if match[0][1:-1] == crc32:
                status = True
            else:
                status = False
            result.append({
                "good": status,
                "sum": crc32,
                "file": file
            })
    return result

if __name__ == "__main__":
    if len(sys.argv)-1 == 1:
        print("CRC32", get_crc32(sys.argv[1]))

main.py

import os, sys
import wx
import crc32

class CRC32ScanWindow(wx.Frame):
    def __init__(self, parent, title, filepath):
        super(CRC32ScanWindow, self).__init__(parent, title=title, size=(500, 300))

        panel = wx.Panel(self)
        vbox = wx.BoxSizer(wx.VERTICAL)

        self.list_ctrl = wx.ListCtrl(panel, style=wx.LC_REPORT)
        self.list_ctrl.InsertColumn(0, 'File Name', width=300)
        self.list_ctrl.InsertColumn(1, 'CRC32', width=100)
        self.list_ctrl.InsertColumn(2, 'Status', width=100)

        vbox.Add(self.list_ctrl, proportion=1, flag=wx.EXPAND | wx.ALL, border=5)

        panel.SetSizer(vbox)

        self.list_ctrl.Bind(wx.EVT_LEFT_DCLICK, self.OnDoubleClick)
        
        self.Center()
        
        busy = wx.BusyInfo("Please wait, scanning...")
        wx.Yield()
        results = crc32.scan(filepath)
        for result in results:
            index = self.list_ctrl.InsertItem(self.list_ctrl.GetItemCount(), result['file'])
            self.list_ctrl.SetItem(index, column=1, label=result['sum'])
            self.list_ctrl.SetItem(index, column=2, label="Good" if result['good'] else "Bad")
        busy = None
        self.Show(True)
    
    def OnDoubleClick(self, event):
        pos = event.GetPosition()
        index, _ = self.list_ctrl.HitTest(pos)
        column = self.GetColumnFromPosition(pos)
        
        if index != wx.NOT_FOUND and column != wx.NOT_FOUND:
            value = self.list_ctrl.GetItem(index, column).GetText()
            
            clipboard = wx.Clipboard.Get()
            clipboard.Open()
            clipboard.SetData(wx.TextDataObject(value))
            clipboard.Close()

            wx.MessageBox(f"Value copied: {value}", "Copied", wx.OK | wx.ICON_INFORMATION)

    def GetColumnFromPosition(self, pos):
        x, _ = pos
        width_accumulator = 0
        for col in range(self.list_ctrl.GetColumnCount()):
            width = self.list_ctrl.GetColumnWidth(col)
            if x >= width_accumulator and x < width_accumulator + width:
                return col
            width_accumulator += width
        return None

def show_crc32_scan_window(filepath):
    app = wx.App()
    frame = CRC32ScanWindow(None, 'CRC32 Scan', filepath)
    app.MainLoop()

if __name__ == "__main__":
    if len(sys.argv)-1 == 1:
        show_crc32_scan_window(sys.argv[1])