# BaseConvert
# DESCRIPTION:
# Got the code originally from
# http://rosettacode.org/wiki/Non-decimal_radices/Convert#Ruby
# which I then converted to a class.
# SINOPSIS:
def ok(a,b)
raise "bad! /#a/ == /#b/" unless a == b
end
# ruby -I ./lib README.txt
if RUBY_VERSION =~ /^1.9.2/ then
require 'base_convert'
# Verify it works up to base 36 with number.to_s(n)
2.upto(36) do |n|
base = BaseConvert.new(n)
100.times do
number = rand(10000)
string = number.to_s(n)
ok( base.convert(string), number )
ok( base.convert(number), string.upcase ) # BaseConvert uses caps
end
end
# BaseConvert is case insensitive up to base 36, but
# returns string values with capital leters.
# At base 37 and up, it's case sensitive with lower case letter being of higher order.
# It primary use is to reduce digest strings.
# For example:
require 'digest'
# This hexadecimal:
ok( "7f83b1657ff1fc53b92dc18148a1d65dfc2d4b1fa3d677284addd200126d9069",
hexdigest = Digest::SHA256.hexdigest('Hello World!') )
# Translatates to this word(\w except '_') string
ok( string = 'UEjKBW7lvEq1KjyCxAYQRJqmvffQEbwLNvzs8Ggdy4P',
BaseConvert.new(:hexadecimal,:word).convert(hexdigest) )
# and we can covert it back:
ok( BaseConvert.new(:word,:hexadecimal).convert(string),
hexdigest.upcase )
# Again, note the BaseConvert returns the hexdigest string capitalized.
#There is also a quotable string([[:graph:]] except [`'"]):
ok( qstring = '$<c6PCX_mugC58xfO5JOp+V4|<jHekI^_WE$?d?9',
BaseConvert.new(:hexadecimal,:qgraph).convert(hexdigest))
# And you can convert it back
ok( BaseConvert.new(:qgraph,:hexadecimal).convert(qstring),
hexdigest.upcase)
# Note the length
ok( 64, hexdigest.length)
ok( 43, string.length)
ok( 40, qstring.length)
# BaseConvert has the following primary form:
# # converting from basefrom to baseto
# base = BaseConvert.new( basefrom, baseto )
# # covert basefrom_string in basefrom to baseto_string in baseto
# baseto_string = base.convert( basefrom_string )
# # convert basefrom_string to it's decimal number representation
# decimal_number = base.base2dec( basefrom_string )
# # convert a decimal_number to it's baseto string representation
# baseto_string = base.dec2base( decimal_number )
# BaseConvert has the following heuristic forms:
# # converting to and from _base_
# base = BaseConvert.new( _base_ )
# base_string = base.convert( decimal_number )
# decimal_number = base.convert( base_string )
# BaseConvert has the following mneumonic keys that can be use for base:
# :binary => 2
# :oct,:octal => 8,
# :dec,:decimal => 10,
# :hex,:hexadecimal => 16
# BaseConvert's base can go up to 62 with :word(\w except '_') and 91 with :qgraph([:graph] except [`'"].
# By default, :word is used...
ok( '6laZE', BaseConvert.new(62).convert( 100_000_000 ))
# ...until a transition to :qgraph is required.
ok( ')8]3H', BaseConvert.new(63).convert( 100_000_000 ))
# But you can specify the digit dictionary. At this point you've read and know the code...
base = BaseConvert.new(62)
base.to_digits = BaseConvert::QGRAPH
ok( ')RGF1', base.convert( 100_000_000 ))
end
# The End.
# <i>carlosjhr64</i>@<i>gmail<i/>.<i>com</i>
# DESCRIPTION:
# Got the code originally from
# http://rosettacode.org/wiki/Non-decimal_radices/Convert#Ruby
# which I then converted to a class.
# SINOPSIS:
def ok(a,b)
raise "bad! /#a/ == /#b/" unless a == b
end
# ruby -I ./lib README.txt
if RUBY_VERSION =~ /^1.9.2/ then
require 'base_convert'
# Verify it works up to base 36 with number.to_s(n)
2.upto(36) do |n|
base = BaseConvert.new(n)
100.times do
number = rand(10000)
string = number.to_s(n)
ok( base.convert(string), number )
ok( base.convert(number), string.upcase ) # BaseConvert uses caps
end
end
# BaseConvert is case insensitive up to base 36, but
# returns string values with capital leters.
# At base 37 and up, it's case sensitive with lower case letter being of higher order.
# It primary use is to reduce digest strings.
# For example:
require 'digest'
# This hexadecimal:
ok( "7f83b1657ff1fc53b92dc18148a1d65dfc2d4b1fa3d677284addd200126d9069",
hexdigest = Digest::SHA256.hexdigest('Hello World!') )
# Translatates to this word(\w except '_') string
ok( string = 'UEjKBW7lvEq1KjyCxAYQRJqmvffQEbwLNvzs8Ggdy4P',
BaseConvert.new(:hexadecimal,:word).convert(hexdigest) )
# and we can covert it back:
ok( BaseConvert.new(:word,:hexadecimal).convert(string),
hexdigest.upcase )
# Again, note the BaseConvert returns the hexdigest string capitalized.
#There is also a quotable string([[:graph:]] except [`'"]):
ok( qstring = '$<c6PCX_mugC58xfO5JOp+V4|<jHekI^_WE$?d?9',
BaseConvert.new(:hexadecimal,:qgraph).convert(hexdigest))
# And you can convert it back
ok( BaseConvert.new(:qgraph,:hexadecimal).convert(qstring),
hexdigest.upcase)
# Note the length
ok( 64, hexdigest.length)
ok( 43, string.length)
ok( 40, qstring.length)
# BaseConvert has the following primary form:
# # converting from basefrom to baseto
# base = BaseConvert.new( basefrom, baseto )
# # covert basefrom_string in basefrom to baseto_string in baseto
# baseto_string = base.convert( basefrom_string )
# # convert basefrom_string to it's decimal number representation
# decimal_number = base.base2dec( basefrom_string )
# # convert a decimal_number to it's baseto string representation
# baseto_string = base.dec2base( decimal_number )
# BaseConvert has the following heuristic forms:
# # converting to and from _base_
# base = BaseConvert.new( _base_ )
# base_string = base.convert( decimal_number )
# decimal_number = base.convert( base_string )
# BaseConvert has the following mneumonic keys that can be use for base:
# :binary => 2
# :oct,:octal => 8,
# :dec,:decimal => 10,
# :hex,:hexadecimal => 16
# BaseConvert's base can go up to 62 with :word(\w except '_') and 91 with :qgraph([:graph] except [`'"].
# By default, :word is used...
ok( '6laZE', BaseConvert.new(62).convert( 100_000_000 ))
# ...until a transition to :qgraph is required.
ok( ')8]3H', BaseConvert.new(63).convert( 100_000_000 ))
# But you can specify the digit dictionary. At this point you've read and know the code...
base = BaseConvert.new(62)
base.to_digits = BaseConvert::QGRAPH
ok( ')RGF1', base.convert( 100_000_000 ))
end
# The End.
# <i>carlosjhr64</i>@<i>gmail<i/>.<i>com</i>