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# delta.rb: Written by Tadayoshi Funaba 2004-2009
require 'date'
require 'date/delta/parser'
class Date
class Delta
include Comparable
UNIT_PREFIXES = {
'yotta' => Rational(10**24),
'zetta' => Rational(10**21),
'exa' => Rational(10**18),
'peta' => Rational(10**15),
'tera' => Rational(10**12),
'giga' => Rational(10**9),
'mega' => Rational(10**6),
'kilo' => Rational(10**3),
'hecto' => Rational(10**2),
'deca' => Rational(10**1),
'deka' => Rational(10**1),
'deci' => Rational(1, 10**1),
'centi' => Rational(1, 10**2),
'milli' => Rational(1, 10**3),
'decimilli' => Rational(1, 10**4),
'centimilli' => Rational(1, 10**5),
'micro' => Rational(1, 10**6),
'nano' => Rational(1, 10**9),
'millimicro' => Rational(1, 10**9),
'pico' => Rational(1, 10**12),
'micromicro' => Rational(1, 10**12),
'femto' => Rational(1, 10**15),
'atto' => Rational(1, 10**18),
'zepto' => Rational(1, 10**21),
'yocto' => Rational(1, 10**24)
}
IUNITS = {
'year' => Complex(0, 12),
'month' => Complex(0, 1)
}
RUNITS = {
'day' => Rational(1),
'week' => Rational(7),
'sennight' => Rational(7),
'fortnight' => Rational(14),
'hour' => Rational(1, 24),
'minute' => Rational(1, 1440),
'second' => Rational(1, 86400)
}
UNIT_PREFIXES.each do |k, v|
RUNITS[k + 'second'] = v * RUNITS['second']
end
remove_const :UNIT_PREFIXES
UNITS = {}
IUNITS.each do |k, v|
UNITS[k] = v
end
RUNITS.each do |k, v|
UNITS[k] = v
end
UNITS4KEY = {}
UNITS.each do |k, v|
UNITS4KEY[k] = UNITS4KEY[k + 's'] = v
end
UNITS4KEY['y'] = UNITS4KEY['years']
UNITS4KEY['yr'] = UNITS4KEY['years']
UNITS4KEY['yrs'] = UNITS4KEY['years']
UNITS4KEY['m'] = UNITS4KEY['months']
UNITS4KEY['mo'] = UNITS4KEY['months']
UNITS4KEY['mon'] = UNITS4KEY['months']
UNITS4KEY['mnth'] = UNITS4KEY['months']
UNITS4KEY['mnths'] = UNITS4KEY['months']
UNITS4KEY['w'] = UNITS4KEY['weeks']
UNITS4KEY['wk'] = UNITS4KEY['weeks']
UNITS4KEY['d'] = UNITS4KEY['days']
UNITS4KEY['dy'] = UNITS4KEY['days']
UNITS4KEY['dys'] = UNITS4KEY['days']
UNITS4KEY['h'] = UNITS4KEY['hours']
UNITS4KEY['hr'] = UNITS4KEY['hours']
UNITS4KEY['hrs'] = UNITS4KEY['hours']
UNITS4KEY['min'] = UNITS4KEY['minutes']
UNITS4KEY['mins'] = UNITS4KEY['minutes']
UNITS4KEY['s'] = UNITS4KEY['seconds']
UNITS4KEY['sec'] = UNITS4KEY['seconds']
UNITS4KEY['secs'] = UNITS4KEY['seconds']
UNITS4KEY['ms'] = UNITS4KEY['milliseconds']
UNITS4KEY['msec'] = UNITS4KEY['milliseconds']
UNITS4KEY['msecs'] = UNITS4KEY['milliseconds']
UNITS4KEY['milli'] = UNITS4KEY['milliseconds']
UNITS4KEY['us'] = UNITS4KEY['microseconds']
UNITS4KEY['usec'] = UNITS4KEY['microseconds']
UNITS4KEY['usecs'] = UNITS4KEY['microseconds']
UNITS4KEY['micro'] = UNITS4KEY['microseconds']
UNITS4KEY['ns'] = UNITS4KEY['nanoseconds']
UNITS4KEY['nsec'] = UNITS4KEY['nanoseconds']
UNITS4KEY['nsecs'] = UNITS4KEY['nanoseconds']
UNITS4KEY['nano'] = UNITS4KEY['nanoseconds']
def self.delta_to_dhms(delta)
fr = delta.imag.abs
y, fr = fr.divmod(12)
m, fr = fr.divmod(1)
if delta.imag < 0
y = -y
m = -m
end
fr = delta.real.abs
ss, fr = fr.divmod(SECONDS_IN_DAY) # 4p
d, ss = ss.divmod(86400)
h, ss = ss.divmod(3600)
min, s = ss.divmod(60)
if delta.real < 0
d = -d
h = -h
min = -min
s = -s
end
return y, m, d, h, min, s, fr
end
def self.dhms_to_delta(y, m, d, h, min, s, fr)
fr = 0 if fr == 0
Complex(0, y.to_i * 12 + m.to_i) +
Rational(d * 86400 + h * 3600 + min * 60 + (s + fr), 86400) # 4p
end
def initialize(delta)
@delta = delta
@__ca__ = {}
end
class << self; alias_method :new!, :new end
def self.new(arg=0, h=0, min=0, s=0)
if Hash === arg
d = Complex(0)
arg.each do |k, v|
k = k.to_s.downcase
unless UNITS4KEY[k]
raise ArgumentError, "unknown keyword #{k}"
end
d += v * UNITS4KEY[k]
end
else
d = dhms_to_delta(0, 0, arg, h, min, s, 0)
end
new!(d)
end
UNITS.each_key do |k|
module_eval <<-"end;"
def self.#{k}s(n=1)
new(:d=>n * UNITS['#{k}'])
end
end;
end
class << self; alias_method :mins, :minutes end
class << self; alias_method :secs, :seconds end
def self.parse(str)
d = begin (@@pa ||= Parser.new).parse(str)
rescue Racc::ParseError
raise ArgumentError, 'syntax error'
end
new!(d)
end
def self.diff(d1, d2) new(d1.ajd - d2.ajd) end
class << self
def once(*ids) # :nodoc: -- restricted
for id in ids
module_eval <<-"end;"
alias_method :__#{id.object_id}__, :#{id.to_s}
private :__#{id.object_id}__
def #{id.to_s}(*args)
@__ca__[#{id.object_id}] ||= __#{id.object_id}__(*args)
end
end;
end
end
private :once
end
def dhms() self.class.delta_to_dhms(@delta) end
once :dhms
def delta() @delta end
protected :delta
def years() dhms[0] end
def months() dhms[1] end
def days() dhms[2] end
def hours() dhms[3] end
def minutes() dhms[4] end
def seconds() dhms[5] end
def second_fractions() dhms[6] end
alias_method :mins, :minutes
alias_method :secs, :seconds
alias_method :sec_fractions, :second_fractions
RUNITS.each_key do |k|
module_eval <<-"end;"
def in_#{k}s(u=1)
if @delta.imag != 0
raise ArgumentError, "#{k}: #{self} has month"
end
@delta.real / (u * RUNITS['#{k}'])
end
end;
end # <<dummy
alias_method :in_mins, :in_minutes
alias_method :in_secs, :in_seconds
def zero?() @delta.zero? end
def nonzero?() unless zero? then self end end
def integer? () @delta.imag == 0 && @delta.real.integer? end
def -@ () self.class.new!(-@delta) end
def +@ () self.class.new!(+@delta) end
def dx_addsub(m, n)
case n
when Numeric; return self.class.new!(@delta.__send__(m, n))
when Delta; return self.class.new!(@delta.__send__(m, n.delta))
else
l, r = n.coerce(self)
return l.__send__(m, r)
end
end
private :dx_addsub
def + (n) dx_addsub(:+, n) end
def - (n) dx_addsub(:-, n) end
def dx_muldiv(m, n)
case n
when Numeric
return self.class.new!(@delta.__send__(m, n))
else
l, r = n.coerce(self)
return l.__send__(m, r)
end
end
private :dx_muldiv
def * (n) dx_muldiv(:*, n) end
def / (n) dx_muldiv(:/, n) end
def dx_conv1(m, n)
if @delta.imag != 0
raise ArgumentError, "#{m}: #{self} has month"
end
case n
when Numeric
return self.class.new!(Complex(@delta.real.__send__(m, n), 0))
else
l, r = n.coerce(self)
return l.__send__(m, r)
end
end
private :dx_conv1
def % (n) dx_conv1(:%, n) end
def div(n) dx_conv1(:div, n) end
def modulo(n) dx_conv1(:modulo, n) end
def divmod(n) [div(n), modulo(n)] end
def quotient(n)
if @delta.imag != 0
raise ArgumentError, "quotient: #{self} has month"
end
case n
when Numeric
return self.class.new!(Complex((@delta.real / n).truncate))
else
l, r = n.coerce(self)
return l.__send__(m, r)
end
end
def remainder(n) dx_conv1(:remainder, n) end
def quotrem(n) [quotient(n), remainder(n)] end
def ** (n) dx_conv1(:**, n) end
def quo(n) dx_muldiv(:quo, n) end
def <=> (other)
if @delta.imag != 0
raise ArgumentError, "<=>: #{self} has month"
end
case other
when Numeric; return @delta.real <=> other
when Delta; return @delta.real <=> other.delta.real
else
begin
l, r = other.coerce(self)
return l <=> r
rescue NoMethodError
end
end
nil
end
def == (other)
case other
when Numeric; return @delta == other
when Delta; return @delta == other
else
begin
l, r = other.coerce(self)
return l == r
rescue NoMethodError
end
end
nil
end
def coerce(other)
case other
when Numeric; return other, @delta
else
super
end
end
def eql? (other) Delta === other && self == other end
def hash() @delta.hash end
def dx_conv0(m)
if @delta.imag != 0
raise ArgumentError, "#{m}: #{self} has month"
end
@delta.real.__send__(m)
end
private :dx_conv0
def abs() dx_conv0(:abs) end
def ceil() dx_conv0(:ceil) end
def floor() dx_conv0(:floor) end
def round() dx_conv0(:round) end
def truncate() dx_conv0(:truncate) end
def to_i() dx_conv0(:to_i) end
def to_f() dx_conv0(:to_f) end
def to_r() dx_conv0(:to_r) end
def to_c() @delta end
alias_method :to_int, :to_i
def inspect() format('#<%s: %s (%s)>', self.class, to_s, @delta) end
def to_s
format(%(%s(%dd %.02d:%02d'%02d"%03d)%s(%dy %dm)), # '
if @delta.real < 0 then '-' else '+' end,
days.abs, hours.abs, mins.abs, secs.abs, sec_fractions.abs * 1000,
if @delta.imag < 0 then '-' else '+' end,
years.abs, months.abs)
end
def marshal_dump() @delta end
def marshal_load(a)
@delta = a
@__ca__ = {}
end
end
end
vsave = $VERBOSE
$VERBOSE = false
class Date
def + (n)
case n
when Numeric; return self.class.new!(@ajd + n, @of, @sg)
when Delta
d = n.__send__(:delta)
return (self >> d.imag) + d.real
end
raise TypeError, 'expected numeric'
end
def - (x)
case x
when Numeric; return self.class.new!(@ajd - x, @of, @sg)
when Date; return @ajd - x.ajd
when Delta
d = x.__send__(:delta)
return (self << d.imag) - d.real
end
raise TypeError, 'expected numeric'
end
end
$VERBOSE = vsave
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