Noviceatthis

Write Binary Data

11 posts in this topic

Hello all, 

So ive been trying to write data to a file:

$bin = "Test"
$hFile = FileOpen("test.bin", 17)
FileWrite($hFile, Binary($bin))
FileClose($hFile)

So the above example does not write the data in binary format, it just seems to write it in plain text

$bin = "Test"
$hFile = FileOpen("test.bin", 17)
FileWrite($hFile, Binary(0))
FileWrite($hFile, Binary($bin))
FileClose($hFile)

However this one does write it in binary format, I was just wondering why this was, and whether the additional line can be avoided.

Thanks in advance

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StringToBinary('Test',....


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@mlipok, thanks for the speedy reply

$bin = StringtoBinary("Test")
$hFile = FileOpen("test.bin", 17)
FileWrite($hFile, $bin)
FileClose($hFile)

that seems to do the same thing as the first example I mentioned before....

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$hFile = FileOpen("test.bin",  $FO_OVERWRITE+ $FO_BINARY)


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"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

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#5 ·  Posted (edited)

where in the string "Test" are you expecting the "Binary" data to come from?

Or more simply what sort of output were you expecting?

A string with a leading or trailing null byte?

Ed: Or perhaps you were hoping for a null delimited interpretation of "Test".

Edited by Mobius

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@Mobius, so when I enter the additional line, the string 'Test' is shown as 0000 0000 5465 7374 in the bin file (where the 0000 0000 is the '0' in the additional line and the 5465 7374 is the 'Test' string) but without the additional line, the bin file just shows 'Test' in plain text.

So I was just wondering why the additional line is needed,and how the information in the bin file can result in just the 5465 7374 without the additional line. 

Does that make sense?? Apologies if I'm not being very clear

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@mlipok, 

$hFile = FileOpen("test.bin",  $FO_OVERWRITE+ $FO_BINARY)

That seemed to have the same effect as using 17

1 person likes this

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#8 ·  Posted (edited)

here is SSEE (some self explanatory example)

#include <FileConstants.au3>
#include <MsgBoxConstants.au3>


Global $sText = InputBox("Testing", "Enter your text Here", "", " M")
Global $dTextAsBinaryData = StringToBinary($sText)

MsgBox(0,'$dTextAsBinaryData',$dTextAsBinaryData)
Example($dTextAsBinaryData)

ShellExecute(@ScriptDir & '\test.txt')

Func Example($dBINARYDATA)
    Local $hFile = FileOpen('test.txt', $FO_OVERWRITE + $FO_BINARY)
    FileWrite($hFile, $dBINARYDATA)
    FileClose($hFile)
EndFunc   ;==>Example
Edited by mlipok

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My contribution (my own projects): * Debenu Quick PDF Library - UDF * Debenu PDF Viewer SDK - UDF * Acrobat Reader - ActiveX Viewer * UDF for PDFCreator v1.x.x * XZip - UDF * AppCompatFlags UDF * CrowdinAPI UDF * _WinMergeCompare2Files() * _JavaExceptionAdd() * _IsBeta() * Writing DPI Awareness App - workaround * _AutoIt_RequiredVersion() * Chilkatsoft.au3 UDF * TeamViewer.au3 UDF * JavaManagement UDF * VIES over SOAP * WinSCP UDF * GHAPI UDF - modest begining - comunication with GitHub REST API *

My contribution to others projects or UDF based on  others projects: * _sql.au3 UDF  * POP3.au3 UDF *  RTF Printer - UDF * XML.au3 - BETA * ADO.au3 UDF SMTP Mailer UDF *

Useful links: * Forum Rules * Forum etiquette *  Forum Information and FAQs * How to post code on the forum * AutoIt Online Documentation * AutoIt Online Beta Documentation * SciTE4AutoIt3 getting started * Convert text blocks to AutoIt code * Games made in Autoit * Programming related sites * Polish AutoIt Tutorial * DllCall Code Generator * 

Wiki: Expand your knowledge - AutoIt Wiki * Collection of User Defined Functions * How to use HelpFile * Best coding practices * 

IE Related:  * How to use IE.au3  UDF with  AutoIt v3.3.14.x * Why isn't Autoit able to click a Javascript Dialog? * Clicking javascript button with no ID * IE document >> save as MHT file * IETab Switcher (by LarsJ ) * HTML Entities * _IEquerySelectorAll() (by uncommon) * 

I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

"Homo sum; humani nil a me alienum puto" - Publius Terentius Afer
"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

Signature last update: 2017-06-04

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The additional line is only necessary if you wanted your file to start with 4 nulls.

I am assuming AutoIt did this because Binary(0) is writing a long (4 byte number) with the value of 0.

A file that does not contain null space and you write the hex 54657374 (Test) is going to be treated as a text file because without your line that added nulls that is what it is.

So I have to ask again what were you expecting/wanting when you chose to write a binary file, and more importantly how were you planning on reading and using this data in your program?

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@Mobius, that would explain it, thank you! I havn't decided what I want to do with it yet, I just wanted to figure out what was going on

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@Mobius, that would explain it, thank you! I havn't decided what I want to do with it yet, I just wanted to figure out what was going on

Fair enough dude, I didn't mean to be repetitious with my questioning. :)

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