Older version history:

############################################################################## Math::String:

1.02: fixed new() as copy, bstr works now, dropped multiple charsets 1.03: 02/2001: added support for Math::String::Charset and thus bi-grams

added: caching for more speed 2001-02-14 1.04: fixed inheritance/overloading bugs (objectify)

finally got rid of copy&paste overload 2001-02-16 1.05: fixed overload bug in cmp (Math::String cmp something other) 2001-02-22 1.06: fixed: digits() => length() 2001-03-18 1.07: fixed: documentation
2001-03-25 1.08: added: support for caching of string form 2001-04-13 1.09: as_number: returns now Math::BigInt 2001-05-07 1.10: finally got rid of C&P of overload section 2001-05-13 1.11: added accuracy/precision/fallback/rnd_mode and tests for this 2001-07-08 1.12: added bnan(), binf(), fixed $x->bzero(), added test for these

fixed bug in copy() code in from_number() 2001-07-26 1.13: new( { str => 'abc', num => '123' } ); 2001-08-08 1.14: bstr() was not caching string form, some more tests

copy() does no longer make a (costly) true copy of the charset 2001-09-01 1.15: unreleased

                 binc(), bdec() modify cache for speedup (instead clearing it)
                 added bone(), is_valid(), maxlen(), minlen()
2001-11-05 1.16: added class() 
                 binc(), bdec() modify cache instead of clearing it (speedup)
                 added bone(), is_valid(), minlen(), maxlen(), type(), class() 
2002-02-20 1.17: removed debug output
                 corelib => config()->{lib}
2002-02-28 1.18: binc()/bdec() four times as fast
                 as_number twice as fast
2003-02-06 1.19: removed some needless return statements
                 removed debug printout "changing charset..."
                 added __END__ marker for faster loading
2003-04-07 1.20: added: scale()
                 as_number() uses scale to scale output

2003-04-10 1.21: fixed: bug in UNIVERSAL::isa() call in fromnumber 2003-04-22 1.22: prefer Math::BigInt::GMP on use 2003-07-26 1.23: removed shebang line
2003-12-11 1.24 Tels 599 tests

new( { str => ..., num => ... } ) did not honour scale from charset 2004-11-20 1.25 Tels 662 tests
simplify caching: + remove unused len cache + since we only cache on thing, use a plain scalar instead of a hash, this saves memory per Math::String object and makes everything go a little faster since a hash lookup for ->{str} is no longer necessary
bstr() for uncached strings with SIMPLE charset is now about twice as fast
copy() is about 16% faster (due to simpler cache and streamlining) 2004-11-20 1.26 Tels 662 tests
avoid caching wrong $CALC - load GMP rightaway 2005-01-01 1.27 Tels 662 tests
use register_callback to get notified by Math::BigInt on lib changes ############################################################################## Math::String::Charset:

2000-02-07 1.02: first version with bi-grams 2000-02-14 1.03: fixed: simple charsets to work now,

added: _end hash and ones set 2000-02-16 1.04: added: char(), charlength() 2000-02-17 1.05: fixed: chars with diff. len raise error, works now with

                        characters of length > 1
                        some slight optimizations for simple charsets
2000-02-22 1.06: fixed: documentation (fill-characters, die on error)
                        toggle $Math::String::Charset::dieon_error
                        num2str() is now about a small, constant amount faster
2000-03-18 1.07: fixed: documentation
                 added: separator string/char for 'the lazy fox' style strings
                        renamed type() to order()
                        documented that length() always returns count of chars

2000-03-25 1.08: added: next(), prev() for simple charsets (cache in M::S) 2000-06-26 1.09: fixed: bug accessing BigInt's internals, fails for BitVect etc 2000-09-01 1.10: split: into Charset, Nested and Grouped

                 fixed: next()/prev() work now
                 added: support for minlen, maxlen, ones(), type()
2000-10-19 1.11: fixed: Math::BigInt::bzero() => Math::BigInt->bero()
                 split Charset.pm into
                        Math::String::Charset::Simple  (type = 0, order = 1)
                        Math::String::Charset::Nested  (type = 0, order > 1)
                        Math::String::Charset::Grouped (type = 1, order = 1)
                 added: support for minlen and maxlen
                        ones(), count(), zero(), one(), type() and tests
                        next/prev actually work
                        analyze is alias for study, can export analyze
                fixed:  better error handling upon initialization
                        is now subclassable
                        first()/last() work now with sep char, added tests
                        make Math::String->first($length,$set) work
                         (and last(), too), test for it
                        study:
                         'chars' and 'start' for depth => 1
                         depth as alias for order
                         can return histogram (hist => 1)
                         now works for the "hocuspocus" example
                         tests are now in seperate file

2003-02-06 1.12: added __END__ marker for faster loading 2003-04-10 1.13: added scale() and scale as parameter to new() 2003-04-22 1.14: fix for scale not beeing a legal parameter to new()

                 prefer Math::BigInt::GMP on use
                 added method copy()
2003-07-26 1.15: require Math::String::Charset::Wordlist vs. use
                 added lib => 'GMP'
                 removed shebang line

2004-11-20 1.16

for simple Charsets, the _end hash can be shared with the _map hash. That reduces memory by at least 20% (a..z, leaning towards 30% for larger sets) and makes new() at least 10% (a..z, more for larger sets) faster, too :)
dump() returns the dump as string instead of printing it
fix end keys in dump from SIMPLE charsets
dump() takes optional indend parameter
remove unused SIMPLE() in Charset.pm
streamlined str2num() to make "new()" faster
streamlined num2str() to make "bstr()" faster
remove GMP lib (let caller decide)

############################################################################## Math::String::Charset::Grouped:
2000-09-20 0.01: first version from Charset 2000-10-25 0.02: fixed bugs, added sep char support 2003-02-06 0.03: added __END__ marker for faster loading 2003-04-14 0.04: fix for scale not beeing a legal parameter to new() 2003-07-26 0.05: added lib => 'GMP'

removed shebang line
2004-11-20 0.06: fix dump() for GROUPED charsets

remove GMP lib (let caller decide)

############################################################################## Math::String::Charset::Nested:
2000-09-15 0.01: split from Charset

                 fixed: bi-gram chars w/o followers can't be in _start
                 class() was wrong for bi-grams (with some start sets)

2003-02-06 0.02: added __END__ marker for faster loading 2003-04-14 0.03: fix for scale not beeing a legal parameter to new() 2003-07-26 0.04: added lib => 'GMP'

removed shebang line
2004-11-20 0.05: remove GMP lib (let caller decide)

############################################################################## Math::String::Charset::Wordlist was moved into it's own distribution

############################################################################## Math::String::Sequence:

2001-03-20 1.00 first version, complete with test and doc 2001-03-24 1.01 support for reversed sequences 2001-04-21 1.02 added: as_array for 'a'..'z' emulation 2003-02-06 1.03 added __END__ marker for faster loading

fixed a potential problem in as_array() 2003-07-26 1.04 added lib => 'GMP'

removed shebang line
2004-11-20 0.05: remove GMP lib (let caller decide) 2005-01-01 0.06: remove a couple of needless return statements