diff options
Diffstat (limited to 'activesupport/lib/active_support/vendor/tzinfo-0.3.13/lib/tzinfo/offset_rationals.rb')
| -rw-r--r-- | activesupport/lib/active_support/vendor/tzinfo-0.3.13/lib/tzinfo/offset_rationals.rb | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/vendor/tzinfo-0.3.13/lib/tzinfo/offset_rationals.rb b/activesupport/lib/active_support/vendor/tzinfo-0.3.13/lib/tzinfo/offset_rationals.rb new file mode 100644 index 0000000000..b1f10b2b63 --- /dev/null +++ b/activesupport/lib/active_support/vendor/tzinfo-0.3.13/lib/tzinfo/offset_rationals.rb @@ -0,0 +1,98 @@ +#-- +# Copyright (c) 2006 Philip Ross +# +# Permission is hereby granted, free of charge, to any person obtaining a copy +# of this software and associated documentation files (the "Software"), to deal +# in the Software without restriction, including without limitation the rights +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +# copies of the Software, and to permit persons to whom the Software is +# furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in all +# copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +# THE SOFTWARE. +#++ + +require 'rational' +require 'tzinfo/ruby_core_support' + +module TZInfo + + # Provides a method for getting Rationals for a timezone offset in seconds. + # Pre-reduced rationals are returned for all the half-hour intervals between + # -14 and +14 hours to avoid having to call gcd at runtime. + module OffsetRationals #:nodoc: + @@rational_cache = { + -50400 => RubyCoreSupport.rational_new!(-7,12), + -48600 => RubyCoreSupport.rational_new!(-9,16), + -46800 => RubyCoreSupport.rational_new!(-13,24), + -45000 => RubyCoreSupport.rational_new!(-25,48), + -43200 => RubyCoreSupport.rational_new!(-1,2), + -41400 => RubyCoreSupport.rational_new!(-23,48), + -39600 => RubyCoreSupport.rational_new!(-11,24), + -37800 => RubyCoreSupport.rational_new!(-7,16), + -36000 => RubyCoreSupport.rational_new!(-5,12), + -34200 => RubyCoreSupport.rational_new!(-19,48), + -32400 => RubyCoreSupport.rational_new!(-3,8), + -30600 => RubyCoreSupport.rational_new!(-17,48), + -28800 => RubyCoreSupport.rational_new!(-1,3), + -27000 => RubyCoreSupport.rational_new!(-5,16), + -25200 => RubyCoreSupport.rational_new!(-7,24), + -23400 => RubyCoreSupport.rational_new!(-13,48), + -21600 => RubyCoreSupport.rational_new!(-1,4), + -19800 => RubyCoreSupport.rational_new!(-11,48), + -18000 => RubyCoreSupport.rational_new!(-5,24), + -16200 => RubyCoreSupport.rational_new!(-3,16), + -14400 => RubyCoreSupport.rational_new!(-1,6), + -12600 => RubyCoreSupport.rational_new!(-7,48), + -10800 => RubyCoreSupport.rational_new!(-1,8), + -9000 => RubyCoreSupport.rational_new!(-5,48), + -7200 => RubyCoreSupport.rational_new!(-1,12), + -5400 => RubyCoreSupport.rational_new!(-1,16), + -3600 => RubyCoreSupport.rational_new!(-1,24), + -1800 => RubyCoreSupport.rational_new!(-1,48), + 0 => RubyCoreSupport.rational_new!(0,1), + 1800 => RubyCoreSupport.rational_new!(1,48), + 3600 => RubyCoreSupport.rational_new!(1,24), + 5400 => RubyCoreSupport.rational_new!(1,16), + 7200 => RubyCoreSupport.rational_new!(1,12), + 9000 => RubyCoreSupport.rational_new!(5,48), + 10800 => RubyCoreSupport.rational_new!(1,8), + 12600 => RubyCoreSupport.rational_new!(7,48), + 14400 => RubyCoreSupport.rational_new!(1,6), + 16200 => RubyCoreSupport.rational_new!(3,16), + 18000 => RubyCoreSupport.rational_new!(5,24), + 19800 => RubyCoreSupport.rational_new!(11,48), + 21600 => RubyCoreSupport.rational_new!(1,4), + 23400 => RubyCoreSupport.rational_new!(13,48), + 25200 => RubyCoreSupport.rational_new!(7,24), + 27000 => RubyCoreSupport.rational_new!(5,16), + 28800 => RubyCoreSupport.rational_new!(1,3), + 30600 => RubyCoreSupport.rational_new!(17,48), + 32400 => RubyCoreSupport.rational_new!(3,8), + 34200 => RubyCoreSupport.rational_new!(19,48), + 36000 => RubyCoreSupport.rational_new!(5,12), + 37800 => RubyCoreSupport.rational_new!(7,16), + 39600 => RubyCoreSupport.rational_new!(11,24), + 41400 => RubyCoreSupport.rational_new!(23,48), + 43200 => RubyCoreSupport.rational_new!(1,2), + 45000 => RubyCoreSupport.rational_new!(25,48), + 46800 => RubyCoreSupport.rational_new!(13,24), + 48600 => RubyCoreSupport.rational_new!(9,16), + 50400 => RubyCoreSupport.rational_new!(7,12)} + + # Returns a Rational expressing the fraction of a day that offset in + # seconds represents (i.e. equivalent to Rational(offset, 86400)). + def rational_for_offset(offset) + @@rational_cache[offset] || Rational(offset, 86400) + end + module_function :rational_for_offset + end +end |