Binary patching program
-----------------------

Takes a file and an offset into the file, and replaces, ORs, XORs, or
ANDs a contiguous byte sequence at that offset within the file
(in-place).  The byte sequence is taken as hex digit pairs, with no
separator.

Alternatively, prints out a byte sequence.

Compile
-------

cmake  -DCMAKE_BUILD_TYPE=Release . && make

Test
----

make test

Install
-------

make install


Usage
-----

Modifying:

  binpatch <filename> (<op> <offset> <change>)*

Printing:

  binpatch <filename> READ <offset> <length>

Performs byte-level modifications in a file.
op:      SET, XOR, AND, OR
offset:  File offset (hex or decimal)
change:  Hex string

Example:

  binpatch file.bin set 0 ac45 xor 0x400 ffffffffffffffffffffffff
  binpatch file.bin read 0 0x20