I had an idea the other day, kind of a companion program to my Byte Count program posted here.

I don't know if the program is much use for anything, but it was something I thought
someone might be interested in so I am posting it here.

Program will give you the byte locations in file that hex byte entered on command line
appears in file.

To run from Linux Terminal: ./bytelc [-f filename] [-x HexByte]
./bytelc -f bytect -x e8

I wrote the command line procedure to work with or without space after switchs, so the
above command line can be written ./bytelc -fbytect -xe8

As always feed back good or bad is welcome.

Best Regards
John

I assume this is for Linux?

Maybe you could extend it to a byte sequence locator.

Yes it is for Linux.
Good idea about sequence locater.
I will have to get to work on it.




Thanks
John

Cleaned up old version noticed some of the comments in source code were from bytect program.

Added the ability to search for BYTE, WORD or DWORD in file.

Still need to add more error checking.

using command line option switchs:
-b for byte search
-w fro word search
-d for double word search.

./bytelc -f filename -b e8
./bytelc -f filename -w e8ff
./bytelc -f filename -d e8ff3479

Best Regards
John

Good.

Can it search for arbitrary length strings?

Hi Revolution,

I am working on that and will post update.
I figured I would post the version that can search for up to a double
Word length.
It will take me a few days to implement arbitrary lengths.
I don't get to program in assembly often and working on this will help
me to stay involved in Assembly language.

Best Regards
John

Ok here it is the revised version to replace bytelc.

I eliminated the -b byte, -w word, and -d dword options and replaced
with 1 switch option for byte sequence search -s.

This program bytesq will take arbitrary length hex bytes entered on command line.

You can have your byte sequence on command line first as in the 2nd example
shown below it does not matter.
Example: ./btyesq -f filename -s e83d789723eff856636d646c696e
./bytesq -s 45ffef586c -f filename
./bytesq -f filename -s e8

you can enter 1 hex byte or 15 hex bytes or more on command line after -s switch.
you are limited to 128 hex byte sequence but that is pretty long sequence of bytes to
search for.

Best Regards
John

Cool, one use may be to compute the size of a sequence of instructions. I can't calculate them in my head yet. This might be possible by defining a searchable string before the instructions and a separate one after, then subtracting..? I've been subtracting them with labels then writing to a file, which requires some overhead.

I'm not using Linux at the moment, but found out that the new Win 10 update supports Linux installs such as Ubuntu and OpenSUSE. I tried running the executable but got



The Win 10 Linux doesn't include the Linux kernel I think, so this might not be possible. May just be a matter of porting or re-assembling, can take another look later.

Thanks donn,

I don't do a lot of programming in windows anymore, for a while if i wrote something in Linux i
would write the same program for Windows have not done that for a while now.

If I find some time maybe I will try to re-write this for Windows, its not a very big program to
have to translate to Windows platform.



Best Regards
John

Updated bytesq program and added option -t to search for text in binary file.

Linux command line options:
-t <text to look for>
-x <hex byte sequence to look for>

examples:
./bytesq -f filename -t version
./bytesq -f filename -x 04FFAD864C

with -t option if you are searching for a string of text, place string in
quotation marks exp. -t "i am looking for this"

you can enter "./bytesq -h" to get help about command line options


Best Regards
John