X-Git-Url: https://git.njae.me.uk/?a=blobdiff_plain;f=vendor%2Frails%2Factivesupport%2Flib%2Factive_support%2Fvendor%2Ftzinfo-0.3.12%2Ftzinfo%2Fdata_timezone_info.rb;fp=vendor%2Frails%2Factivesupport%2Flib%2Factive_support%2Fvendor%2Ftzinfo-0.3.12%2Ftzinfo%2Fdata_timezone_info.rb;h=a45d94554b1bf6d07b437877f8d7564ec67afd46;hb=437aa336c44c74a30aeea16a06743c32747ed661;hp=0000000000000000000000000000000000000000;hpb=97a0772b06264134cfe38e7494f9427efe0840a0;p=feedcatcher.git

diff --git a/vendor/rails/activesupport/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/data_timezone_info.rb b/vendor/rails/activesupport/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/data_timezone_info.rb
new file mode 100644
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+++ b/vendor/rails/activesupport/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/data_timezone_info.rb
@@ -0,0 +1,228 @@
+#--
+# 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 'tzinfo/time_or_datetime'
+require 'tzinfo/timezone_info'
+require 'tzinfo/timezone_offset_info'
+require 'tzinfo/timezone_period'
+require 'tzinfo/timezone_transition_info'
+
+module TZInfo
+  # Thrown if no offsets have been defined when calling period_for_utc or
+  # periods_for_local. Indicates an error in the timezone data.
+  class NoOffsetsDefined < StandardError
+  end
+    
+  # Represents a (non-linked) timezone defined in a data module.
+  class DataTimezoneInfo < TimezoneInfo #:nodoc:
+            
+    # Constructs a new TimezoneInfo with its identifier.
+    def initialize(identifier)   
+      super(identifier)
+      @offsets = {}
+      @transitions = []
+      @previous_offset = nil
+      @transitions_index = nil
+    end
+ 
+    # Defines a offset. The id uniquely identifies this offset within the
+    # timezone. utc_offset and std_offset define the offset in seconds of 
+    # standard time from UTC and daylight savings from standard time 
+    # respectively. abbreviation describes the timezone offset (e.g. GMT, BST,
+    # EST or EDT).
+    #
+    # The first offset to be defined is treated as the offset that applies
+    # until the first transition. This will usually be in Local Mean Time (LMT).
+    #
+    # ArgumentError will be raised if the id is already defined.
+    def offset(id, utc_offset, std_offset, abbreviation)
+      raise ArgumentError, 'Offset already defined' if @offsets.has_key?(id)
+      
+      offset = TimezoneOffsetInfo.new(utc_offset, std_offset, abbreviation)
+      @offsets[id] = offset
+      @previous_offset = offset unless @previous_offset
+    end
+    
+    # Defines a transition. Transitions must be defined in chronological order.
+    # ArgumentError will be raised if a transition is added out of order.
+    # offset_id refers to an id defined with offset. ArgumentError will be 
+    # raised if the offset_id cannot be found. numerator_or_time and
+    # denomiator specify the time the transition occurs as. See 
+    # TimezoneTransitionInfo for more detail about specifying times.
+    def transition(year, month, offset_id, numerator_or_time, denominator = nil)
+      offset = @offsets[offset_id]      
+      raise ArgumentError, 'Offset not found' unless offset
+            
+      if @transitions_index
+        if year < @last_year || (year == @last_year && month < @last_month)
+          raise ArgumentError, 'Transitions must be increasing date order'
+        end
+        
+        # Record the position of the first transition with this index.
+        index = transition_index(year, month)
+        @transitions_index[index] ||= @transitions.length
+                
+        # Fill in any gaps       
+        (index - 1).downto(0) do |i|
+          break if @transitions_index[i]
+          @transitions_index[i] = @transitions.length
+        end
+      else
+        @transitions_index = [@transitions.length]
+        @start_year = year
+        @start_month = month        
+      end
+      
+      @transitions << TimezoneTransitionInfo.new(offset, @previous_offset, 
+        numerator_or_time, denominator)
+      @last_year = year
+      @last_month = month             
+      @previous_offset = offset
+    end           
+    
+    # Returns the TimezonePeriod for the given UTC time.
+    # Raises NoOffsetsDefined if no offsets have been defined.
+    def period_for_utc(utc)
+      unless @transitions.empty?
+        utc = TimeOrDateTime.wrap(utc)               
+        index = transition_index(utc.year, utc.mon)
+        
+        start_transition = nil
+        start = transition_before_end(index)
+        if start
+          start.downto(0) do |i|
+            if @transitions[i].at <= utc
+              start_transition = @transitions[i]
+              break
+            end
+          end
+        end
+        
+        end_transition = nil
+        start = transition_after_start(index)      
+        if start
+          start.upto(@transitions.length - 1) do |i|
+            if @transitions[i].at > utc
+              end_transition = @transitions[i]
+              break
+            end
+          end
+        end
+               
+        if start_transition || end_transition
+          TimezonePeriod.new(start_transition, end_transition)
+        else
+          # Won't happen since there are transitions. Must always find one
+          # transition that is either >= or < the specified time.
+          raise 'No transitions found in search'
+        end        
+      else
+        raise NoOffsetsDefined, 'No offsets have been defined' unless @previous_offset        
+        TimezonePeriod.new(nil, nil, @previous_offset)
+      end
+    end
+    
+    # Returns the set of TimezonePeriods for the given local time as an array.    
+    # Results returned are ordered by increasing UTC start date.
+    # Returns an empty array if no periods are found for the given time.
+    # Raises NoOffsetsDefined if no offsets have been defined.    
+    def periods_for_local(local)
+      unless @transitions.empty?
+        local = TimeOrDateTime.wrap(local)
+        index = transition_index(local.year, local.mon)
+        
+        result = []
+       
+        start_index = transition_after_start(index - 1)       
+        if start_index && @transitions[start_index].local_end > local           
+          if start_index > 0
+            if @transitions[start_index - 1].local_start <= local 
+              result << TimezonePeriod.new(@transitions[start_index - 1], @transitions[start_index])
+            end
+          else
+            result << TimezonePeriod.new(nil, @transitions[start_index])
+          end
+        end
+        
+        end_index = transition_before_end(index + 1)
+        
+        if end_index        
+          start_index = end_index unless start_index
+          
+          start_index.upto(transition_before_end(index + 1)) do |i|
+            if @transitions[i].local_start <= local
+              if i + 1 < @transitions.length
+                if @transitions[i + 1].local_end > local
+                  result << TimezonePeriod.new(@transitions[i], @transitions[i + 1])
+                end
+              else
+                result << TimezonePeriod.new(@transitions[i], nil)
+              end
+            end
+          end
+        end
+        
+        result
+      else
+        raise NoOffsetsDefined, 'No offsets have been defined' unless @previous_offset
+        [TimezonePeriod.new(nil, nil, @previous_offset)]
+      end
+    end
+    
+    private
+      # Returns the index into the @transitions_index array for a given year 
+      # and month.
+      def transition_index(year, month)
+        index = (year - @start_year) * 2
+        index += 1 if month > 6
+        index -= 1 if @start_month > 6
+        index
+      end
+      
+      # Returns the index into @transitions of the first transition that occurs
+      # on or after the start of the given index into @transitions_index.
+      # Returns nil if there are no such transitions.
+      def transition_after_start(index)
+        if index >= @transitions_index.length
+          nil
+        else
+          index = 0 if index < 0
+          @transitions_index[index]
+        end
+      end
+      
+      # Returns the index into @transitions of the first transition that occurs
+      # before the end of the given index into @transitions_index.
+      # Returns nil if there are no such transitions.
+      def transition_before_end(index)
+        index = index + 1
+        
+        if index <= 0
+          nil
+        elsif index >= @transitions_index.length          
+          @transitions.length - 1
+        else      
+          @transitions_index[index] - 1          
+        end
+      end            
+  end
+end