shuffle3-lean - Improved 3 stage byte shuffler

Deterministically and reversably shuffle a file's bytes around.

Shuffling

Shuffle a file in place

$ shuffle3 -s file

Unshuffling

Unshuffle a file in place

$ shuffle3 -u file

Other options

Run with -h for more options.

Building

Run make to build the normal binary. It will output to shuffle3-release.

Release target

The release (default) target uses the variables RELEASE_CFLAGS, RELEASE_CXXFLAGS and RELEASE_LDFLAGS to specify opitimisations, as well as the OPT_FLAGS variable. These can be set by you if you wish.

Note

The default OPT_FLAGS contains the flag -march=native. This may be underisable for you, in which case set the variable or modify the makefile to remove it.

Debug target

To build with debug information, run make debug. Extra debug flags can be provided with the DEBUG_CFLAGS, DEBUG_CXXFLAGS and DEBUG_LDFLAGS variables which have default values in the Makefile.

The build and unstripped binary will be shuffle3-debug.

Notes

Before switching between release and debug targets, remember to run make clean. To disable stripping of release build binaries, run with make STRIP=: release

License

GPL'd with <3