Revision history for Perl extension Digest::SHA3.

1.04  Fri Apr 20 16:25:30 MST 2018
	- silenced compiler warnings from VS2017
		-- ref. rt.cpan.org #124477
		-- thanks to Sergey Aleynikov for diagnostics
	- modified addfile to return error when given a directory name
		-- makes behavior consistent with GNU coreutils shaXsum
		-- thanks to Scott Baker for pointing this out

1.03  Mon Dec 25 00:08:10 MST 2017
	- added "--ignore-missing" and "--strict" options to sha3sum
		-- consistent with GNU coreutils
		-- ref. rt.cpan.org #123897

1.02  Fri Dec  8 22:44:46 MST 2017
	- added "tag" option (BSD-style checksums) to sha3sum
		-- consistent with GNU sha1sum, sha224sum, etc.
		-- thanks to Christopher Tubbs for suggestion
	- modified SHA3.pm to use XSLoader
		-- falls back to DynaLoader if necessary

1.01  Sun Oct 22 16:04:22 MST 2017
	- added optional $lsb argument for add_bits() method
		-- many public vectors in least-significant-bit format
			-- using $lsb flag results in simpler test code
	- further minor optimizations in add_bits() and tests

1.00  Sat Oct 14 18:08:10 MST 2017
	- promoted to major release version 1.0
		-- module stable enough not to be considered draft
	- fixed alignment issue in BITS mode of addfile
		-- surfaced only for large non-aligned inputs

0.27  Wed Oct  4 00:40:04 MST 2017
	- removed "portable" mode from sha3sum and addfile
		-- rarely used, mostly in outdated systems
		-- potentially confusing features (e.g. \r\r\n -> \n)
		-- Universal Newlines mode (-U) a much cleaner approach
			-- mimics Universal Newlines in Python
	- sha3sum now depends explicitly on Digest::SHA3
		-- eliminates runtime loading of modules
		-- no future plans to write Digest::SHA3::PurePerl

0.26  Wed Sep  6 02:23:08 MST 2017
	- added 'quiet' option to sha3sum
		-- thanks to Chris David for suggestion and initial patch
		-- ref. rt.cpan.org #122750
	- expanded sha3sum --help message
		-- to explain use of escaped FILE names

0.25  Wed Jul 27 20:04:40 MST 2016
	- prevented sha3sum from possibly running malicious code
		-- remove '.' from @INC before module loading
		-- ref. rt.cpan.org #116513
	- namespace cleanup (ref. rt.cpan.org #105371 and #105372)
	- minor code and documentation tweaks

0.24  Sat Jan 10 00:45:34 MST 2015
	- simplified shabits() routine (bitwise input buffering)
		-- slightly less efficient but easier to understand
	- minor documentation tweaks and additions

0.23  Sun Jan  4 05:36:30 MST 2015
	- updated to reflect Draft FIPS 202
		-- append domain separation bits to message
		-- implement SHAKE128 and SHAKE256 Extendable-Output
			Functions (XOFs)

0.22  Sun Jun  1 00:15:46 MST 2014
	- fixed reserved-word clash when compiling with C++
		-- use 'classname' instead of 'class'
			-- ref. SHA3.xs (rt.cpan.org #96090)

0.21  Fri May 16 10:21:46 MST 2014
	- restored original 'addfile' for use on opened file handles
		-- allows callbacks in place of actual files
			-- ref. IO::Callback (rt.cpan.org #95643)
	- re-established inheritance from Digest::base
		-- to pick up future Digest enhancements automatically
	- cleaned up documentation

0.20  Wed May  7 07:57:10 MST 2014
	- consolidated all dynamic memory allocation into XSUBs
		-- streamlines referencing of SHA3 objects
		-- simplifies DESTROYing of objects
	- enhanced Makefile.PL to allow 'use warnings'
		-- automatically reverts to $^W for early Perls
	- scrubbed C and Perl code to remove all compiler warnings

0.12  Sat Apr 19 05:14:50 MST 2014
	- added universal newlines mode ("U") to addfile and sha3sum
		-- based on Python Universal Newlines concept
			-- newlines identical across MacOS, DOS, and UNIX
		-- will deprecate portable mode ("p") in future
			-- "U" mode is cleaner and more efficient
	- enhanced performance
		-- reduced number of dynamic memory allocations
		-- sped up addfile method with use of C code
			-- ref. SHA3.xs (_addfilebin and _addfileuniv)
	- changed text file test (-T) to act on filehandles
		-- improves consistency when reading from STDIN
		-- still must act on filenames for early Perls (< 5.6)
	- sealed memory leak in SHA3.xs
		-- arose only with SvPVbyte exceptions during eval
	- patched inheritence bug (ref: rt.cpan.org #94830)
		-- use sv_isobject/sv_derived_from instead of sv_isa
	- added 'allocated' flag to SHA3 structure (ref. src/sha3.h)
		-- to guard against Perl double frees

0.11  Mon Feb 17 16:42:04 MST 2014
	- tightened code in SHA3.xs
		-- added sv_isa checks when invoking methods

0.10  Thu Jan 30 08:24:30 MST 2014
	- improved the performance of hexadecimal output functions
		-- ref. 'shahex' in src/sha3.c
		-- thanks to Thomas Drugeon for ideas and test script

0.09  Sun Jan  5 19:08:32 MST 2014
	- added a 'squeeze' method for SHA3-0 objects
		-- to construct SHA3-0 digests of any desired length

0.08  Wed Jun 26 04:32:06 MST 2013
	- workaround for repeated calls to shaclose
		-- ref. Bug #86295 (posted at Digest::SHA)
		-- need to explicitly reset internal pointer to NULL
			ref. shaclose() in SHA3.xs
	- corrected typos in sha3sum script
		-- ref. Bug #85430 (posted at Digest::SHA)

0.07  Sat Mar  9 17:36:14 MST 2013
	- untweaked Makefile.PL to remove dependencies of SHA3.c
		-- dependencies were breaking builds on VMS
		-- retaining dependencies provides too little benefit
			for cost of portable workaround

0.06  Mon Mar  4 08:12:04 MST 2013
	- removed code for standalone C operation (no longer used)
		-- eliminates need for external symbols
		-- reduces size of object files
		-- thanks to Marc Lehmann for suggestions
	- tweaked Makefile.PL to show dependencies of SHA3.c

0.05  Thu Jan 24 04:54:14 MST 2013
	- accommodated Unicode string input
		-- by using SvPVbyte instead of SvPV in SHA3.xs
			-- provided workaround for Perl 5.6
		-- added new test script t/unicode.t
	- provided documentation to describe Unicode handling
	- obtained slight speedup on Intel/gcc
		-- by setting -O1 and -fomit-frame-pointer
	- adopted (from Digest::SHA) workaround for DEC compiler bug

0.04  Sun Nov 11 19:20:06 MST 2012
	- enhanced performance
		-- typically 10-15% faster than 0.03
		-- code is still easy to read and modify
	- filled in a few documentation omissions

0.03  Mon Oct 29 04:01:06 MST 2012
	- attained a 2.5x performance increase through loop unrolling
		-- code is still easy to follow
			-- clearly traceable to Keccak pseudo code

0.02  Thu Oct 25 19:18:58 MST 2012
	- original version: adapted from Digest::SHA version 5.72