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Full Discussion: How to parse a binary file?
Top Forums UNIX for Advanced & Expert Users How to parse a binary file? Post 302809057 by wisecracker on Saturday 18th of May 2013 04:14:43 AM
Old 05-18-2013
Hi Ophicus...

Code:
00000000  31 58 58 58 5f 58 58 58  5f 4c 58 58 36 30 39 30  |1XXX_XXX_XX06090|

This does NOT make sense...

Have you manually altered ths?

Bytes 0 to 8 are correct...
Byte 9 is 0x4C and should read "L"...
Byte 10 is correct...
Byte 11 should read "X"...

However try this to extract a single binary byte from anywhere in the file then you can work on it...

Code:
https://www.unix.com/shell-programming-scripting/212715-another-building-block-binary-file-manipulation.html

 

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XmCvtXmStringToByteStream(library call) 								   XmCvtXmStringToByteStream(library call)

NAME
XmCvtXmStringToByteStream -- A compound string function that converts a compound string to a Byte Stream format SYNOPSIS
#include <Xm/Xm.h> unsigned int XmCvtXmStringToByteStream( XmString string, unsigned char **prop_return); DESCRIPTION
XmCvtXmStringToByteStream converts a compound string to a string of bytes representing the compound string in Byte Stream format. This routine is typically used by the source of a data transfer operation to produce a Byte Stream representation for transferring a compound string to a destination. If prop_return is not NULL, this function creates a string of characters in Byte Stream format and returns it in prop_return. The function also returns the number of bytes in prop_return. If prop_return is NULL, the function does not return the Byte Stream format string, but it does calculate and return the number of bytes that would appear in the Byte Stream format string. string Specifies a compound string to be converted to Byte Stream format prop_return Specifies a pointer to a string in Byte Stream format that is created and returned by this function. If prop_return is NULL, no Byte Stream format string is returned. When a Byte Stream format string is returned, the function allocates space to hold it. The application is responsible for managing this allocated space. The application can recover the allocated space by calling XtFree. RETURN
Returns the number of bytes in the Byte Stream representation (whether or not the Byte Stream representation is returned). RELATED
XmString(3) and XmCvtByteStreamToXmString(3). XmCvtXmStringToByteStream(library call)
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