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• !!Processing Templates Files with BinaryTag - Insider Tech Notes
• Binary Sort Two Different Fields
• BinaryPeek versus BinaryPeekStr
• BinaryPoke and Bit Swapping Discussion
• BinaryRead File Line by Line
• BinaryReplace With NULL Characters
• BinarySort Considerations
• BinarySort Example
• BinaryXlate Explanation
• Convert to UTF-8
• Could Not Allocate Binary Buffer Error
• Create Zero Length Binary Value
• CryptAcquireContext Gets a Handle to a Key Container within a CSP
• Example of Keeping Track of Multiple Pointers
• Extract Line 79 from a File
• Insert a Delimiter Every 5 Chars
• Nested Binary Sort
• Offset beyond binary EOD
• Parsing Dilemma
• Remove Line from File that Contains a string
• Remove Line from File
• Replace First Instance of a String in a File
• Retrieve last line from a File
• Search and Replace Another Example
• Search and Replace in Binary Buffer
• Splitting Registry Binary Entry for Writing to INI File
• System Ini writing multiple device lines to
• System.Ini and Device lines
• Use Binary Functions to Edit INI Files
• Use BinaryRead Like FileRead
• Using BinaryPeek to Find Null 00 Character

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BinaryReplace With NULL Characters

 Keywords: BinaryReplace NULL 00 BinaryPeekHex BinaryPokeHex ChrStringToHex

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Question:

I've got a binary buffer that contains a lot of NULL characters. Using BinaryReplace, I can make them human-readable, since the search string allows "" to find NULL characters (say I replace them with "[NULL]").

Lots of other stuff happens -- the buffer gets placed in a file, the user edits it, and it gets read back in to a buffer.

How do I get "[NULL]" back to a NULL character? Using "" as the replacement string seems to be deleting the search string.

Answer:

Yes BinaryReplace is not designed to handle NULL charaters. However here is a cute trick using BinaryPeekHex:

;Detlev Dalitz
;DD.20100715.2255.CEST
intBBSize = 100
hdlBB = BinaryAlloc (intBBsize)
intBytesWritten = BinaryPokeStr (hdlBB, 0, StrFill ("[NULL] ABC", intBBSize))
strHex = BinaryPeekHex (hdlBB, 0, BinaryEodGet (hdlBB))
strHex = StrReplace (strHex, ChrStringToHex ("[NULL]"), "00")
BinaryEodSet (hdlBB, BinaryPokeHex (hdlBB, 0, strHex))
hdlBB = BinaryFree (hdlBB)

Or the ever tricky one-liner.....

;Detlev Dalitz
;DD.20100715.2255.CEST
BinaryEodSet (hdlBB, BinaryPokeHex (hdlBB, 0, StrReplace (BinaryPeekHex (hdlBB, 0, BinaryEodGet (hdlBB)), ChrStringToHex ("[NULL]"), "00")))

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Article ID:   W17679

Filename:   BinaryReplace With NULL Characters.txt

File Created: 2010:07:16:11:21:08

Last Updated: 2010:07:16:11:21:08