def to_yaml( opts = {} )
YAML::quick_emit( self, opts ) do |out|
tz = "Z"
unless self.utc?
utc_same_instant = self.dup.utc
utc_same_writing = Time.utc(year,month,day,hour,min,sec,usec)
difference_to_utc = utc_same_writing - utc_same_instant
if (difference_to_utc < 0)
difference_sign = '-'
absolute_difference = -difference_to_utc
else
difference_sign = '+'
absolute_difference = difference_to_utc
end
difference_minutes = (absolute_difference/60).round
tz = "%s%02d:%02d" % [ difference_sign, difference_minutes / 60, difference_minutes % 60]
end
standard = self.strftime( "%Y-%m-%d %H:%M:%S" )
standard += ".%06d" % [usec] if usec.nonzero?
standard += " %s" % [tz]
if to_yaml_properties.empty?
out.scalar( taguri, standard, :plain )
else
out.map( taguri, to_yaml_style ) do |map|
map.add( 'at', standard )
to_yaml_properties.each do |m|
map.add( m, instance_variable_get( m ) )
end
end
end
end
end