vim - diff - find specific change between two values in hex dump -

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i analyzing hex data binary data dumps basic command-line program of mine. i'm dumping exact contents of struct (a large array of structs, actually) text file.

i create second binary dump, , compare 2 files in vim using xxd create binary-to-text representations of original data.

both files exact same size in bytes, , i'm trying compare 2 in meaningful way. small change in data before dump file results in large change in other parts of file, due other sections containing hashes, functions based on value changed, , forth.

is possible tell diff or vimdiff say, compare 2 files, , show me parts of file in original file (ie: file 1) value set 1, , in second file, value set 32?

thank you!

i use:

diff <(xxd file1.bin) <(xxd file2.bin)

this uses process substitution compare output of 2 xxd processes. note still shows line differences, if byte on line different listed. gives nice hexdump-looking comparison.

the classical tool however, cmp.

so, handled so:

cmp -l file1.raw file2.raw | grep -in "oldvalue" | grep -in "newvalue"

this list need, following fields printed out:

offset  value_in_file_1 value_in_file_2

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