?
Solved

Converting Little Endian Byte Array To Long

Posted on 2003-11-22
2
Medium Priority
?
686 Views
Last Modified: 2007-12-19
Greetings!

I would like to know how to convert a Little Endian byte array to a long value. I already have a code for Big Endian to Long:

For i = LBound(ByteArray) To UBound(ByteArray)
        Return = ShiftLeft(Return, 8) + ByteArray(i)
Next i

ShiftLeft is a function which shifts a value n bits to the left (SHL ; <<).

For Little Endian to Long, I am currently using a loop, which will "mirror" an array and then pass it to the Big Endian to Long function, but that is slow - especially when there are lots of items.
I thought there might be some built in functions or APIs which could accelerate the whole process.

Sebastian Mares
0
Comment
Question by:Sebastian_Mares
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 7

Accepted Solution

by:
Z_Beeblebrox earned 60 total points
ID: 9810605
Hi,

Since little endian is the format used by Intel (x86) you can use the CopyMemory API to do the conversion directly.

Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)

CopyMemory Return, ByteArray(0), 4

Zaphod.
0

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: Martin
Here are a few simple, working, games that you can use as-is or as the basis for your own games. Tic-Tac-Toe This is one of the simplest of all games.   The game allows for a choice of who goes first and keeps track of the number of wins for…
If you need to start windows update installation remotely or as a scheduled task you will find this very helpful.
Get people started with the process of using Access VBA to control Outlook using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Microsoft Outlook. Using automation, an Access applic…
Get people started with the utilization of class modules. Class modules can be a powerful tool in Microsoft Access. They allow you to create self-contained objects that encapsulate functionality. They can easily hide the complexity of a process from…
Suggested Courses
Course of the Month9 days, 22 hours left to enroll

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question