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blindwig

_FileReadBin

4 posts in this topic

I needed to read some binary data out of a file, so I wrote this function. It takes a file handle (you must have already opened the file in read mode) and reads the specified number of bytes. In returns the value of each byte in an array.

CODE

Func _FileReadBin($hndFile, $Amount = 1)

If $Amount <= 0 or not StringIsDigit($hndFile) Then

SetError(1)

Return 0

EndIf

Dim $aReturn[$Amount + 1], $num = 0, $tmp = ''

For $Num = 1 to $Amount

$tmp = FileRead($hndFile, 1)

If @error Then ExitLoop

$aReturn[$num] = Asc($tmp)

Next

ReDim $aReturn[$num]

$aReturn[0] = $num - 1

If $aReturn[0] < $Amount Then SetError(1)

Return $aReturn

EndFunc

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I needed to read some binary data out of a file, so I wrote this function.  It takes a file handle (you must have already opened the file in read mode) and reads the specified number of bytes.  In returns the value of each byte in an array.

CODE

Func _FileReadBin($hndFile, $Amount = 1)

If $Amount <= 0 or not StringIsDigit($hndFile) Then

  SetError(1)

  Return 0

EndIf

Dim $aReturn[$Amount + 1], $num = 0, $tmp = ''

For $Num = 1 to $Amount

  $tmp = FileRead($hndFile, 1)

  If @error Then ExitLoop

  $aReturn[$num] = Asc($tmp)

Next

ReDim $aReturn[$num]

$aReturn[0] = $num - 1

If $aReturn[0] < $Amount Then SetError(1)

Return $aReturn

EndFunc

<{POST_SNAPBACK}>

Will this work on files that contain nulls??

If so you just solved a problem people have been try to solve since the arrival of Autoit3


HKTunes:Softpedia | GoogleCodeLyricToy:Softpedia | GoogleCodeRCTunes:Softpedia | GoogleCodeMichtaToolsProgrammer n. - An ingenious device that turns caffeine into code.

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Will this work on files that contain nulls??

If so you just solved a problem people have been try to solve since the arrival of Autoit3

<{POST_SNAPBACK}>

Yes, it reads nulls. Since it does not store the actual character, only the value, then a null is just a zero, and AutoIt is perfectly capable of storing zeros :(

It might not be the fastest routine out there, but it does the job...

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#4 ·  Posted (edited)

Yes, it reads nulls.  Since it does not store the actual character, only the value, then a null is just a zero, and AutoIt is perfectly capable of storing zeros :(

It might not be the fastest routine out there, but it does the job...

<{POST_SNAPBACK}>

Awesome! :(

Great job.

i can use this for a lot of programs and now we can compare binary files natively in Autoit.

Edited by SolidSnake

HKTunes:Softpedia | GoogleCodeLyricToy:Softpedia | GoogleCodeRCTunes:Softpedia | GoogleCodeMichtaToolsProgrammer n. - An ingenious device that turns caffeine into code.

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