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by: Mercuro |
last post by:
Hello
i'm looking for a simple way to checksum my data.
The data is 70 bytes long per record, so a 32
byte hex md5sum would increase the size of my
mysql db a lot.
I'm looking for something that is 5 bytes long,
for the moment i'm just taking a part of the hex
md5 sum (like this: checksum = md5sum). I
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by: GujuBoy |
last post by:
is there a built-in function that does a "checksum" on a file...basicly
counts the bytes and computes a 16-bit checksum for each given FILE.
this is the like the "sum" command in unix
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by: GujuBoy |
last post by:
i have the following code...which works fine in UNIX but then i move it
over to WINDOWS XP and check the sum on the same file that i tested on
unix and i get different results.
def checksum(fileobj):
filedata = array.array('B', fileobj.read())
totbytes = len(filedata)
result = 0
def rotate_right(c):
if c&1: return (c>>1)|0x8000
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by: pradeep |
last post by:
I have 2 data files,
DATA1 and DATA2 , both same.
My task is to:
Open DATA1, compute the checksum and put it in the end of the
file(don't bother about boundary conditions).close DATA1
Open DATA2,compute the checksum and put it in the end(don't bother
about boundary conditions).close DATA2.
Now again open DATA1, compute the checksum of the file(leaving the
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by: Kevin |
last post by:
I'm on Sun 0S 5.8 and need to calculate the checksum of certain
sections in an ELF binary file. Specifically .text to .rodata. I'm
able to parse through to the program header table and then find the
section header table and then find the correct sections using the
section header string table. Using this method, I am able to find the
offset to the .text section and the number of bytes for the range of
sections i need to calculate the...
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by: Jesper |
last post by:
Gents,
I need the checksum of an xml file in order to verify that no changes has
been made to the file. How is this done.
Second, is it possible to 'embed' the MD5 checksum inside the very same
file. I guess not but perhaps if it is possible to make a partial checksum
not based on the first X characters of the file.
Thank you very
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by: Bob |
last post by:
Hi there,
I am working on an application to be used in our local Forensics
department...
Among other things the app will connect to a digital camera and download the
images to the hard drive. For various reasons I need to be able to say with
certainty that the image on the hard drive is exactly what was on the
camera... any ideas on best way to achieve this...?
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by: rjfjohnson |
last post by:
Hey,
I am trying to communicate with serial device and I need to know the
method used to calculate the 1digit checksum.
I have a commercial program that can communicate with the device, and a
serial port sniffer, and so I am able to get any number of sample
checksum digits. Below is a list of some.
I keep finding patterns, and it seems to revolve around the magic
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by: Kurt |
last post by:
Hi,
I'd like advices about an idea I add to resolve a problem. thanks to
you in advance for yours answers.
I have a database with tables that I load with flat file. The size of
each table is 600 Mb. The flat file are the image of an application
and there is no updated date or created date on any table. So my
tables are just a copy of the data from the flat file.
Now I'd like to create an History Table. So I have to determine which
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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