Froze rails gems

[depot.git] / vendor / rails / activesupport / lib / active_support / vendor / tzinfo-0.3.12 / tzinfo / timezone_offset_info.rb

diff --git a/vendor/rails/activesupport/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/timezone_offset_info.rb b/vendor/rails/activesupport/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/timezone_offset_info.rb
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+#--
+# 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.
+#++
+
+module TZInfo
+  # Represents an offset defined in a Timezone data file.
+  class TimezoneOffsetInfo #:nodoc:
+    # The base offset of the timezone from UTC in seconds.
+    attr_reader :utc_offset
+    
+    # The offset from standard time for the zone in seconds (i.e. non-zero if 
+    # daylight savings is being observed).
+    attr_reader :std_offset
+    
+    # The total offset of this observance from UTC in seconds 
+    # (utc_offset + std_offset).
+    attr_reader :utc_total_offset
+    
+    # The abbreviation that identifies this observance, e.g. "GMT" 
+    # (Greenwich Mean Time) or "BST" (British Summer Time) for "Europe/London". The returned identifier is a 
+    # symbol.
+    attr_reader :abbreviation
+    
+    # Constructs a new TimezoneOffsetInfo. utc_offset and std_offset are
+    # specified in seconds.
+    def initialize(utc_offset, std_offset, abbreviation)
+      @utc_offset = utc_offset
+      @std_offset = std_offset      
+      @abbreviation = abbreviation
+      
+      @utc_total_offset = @utc_offset + @std_offset
+    end
+    
+    # True if std_offset is non-zero.
+    def dst?
+      @std_offset != 0
+    end
+    
+    # Converts a UTC DateTime to local time based on the offset of this period.
+    def to_local(utc)
+      TimeOrDateTime.wrap(utc) {|wrapped|
+        wrapped + @utc_total_offset
+      }
+    end
+    
+    # Converts a local DateTime to UTC based on the offset of this period.
+    def to_utc(local)
+      TimeOrDateTime.wrap(local) {|wrapped|
+        wrapped - @utc_total_offset
+      }
+    end
+    
+    # Returns true if and only if toi has the same utc_offset, std_offset
+    # and abbreviation as this TimezoneOffsetInfo.
+    def ==(toi)
+      toi.respond_to?(:utc_offset) && toi.respond_to?(:std_offset) && toi.respond_to?(:abbreviation) &&
+        utc_offset == toi.utc_offset && std_offset == toi.std_offset && abbreviation == toi.abbreviation
+    end
+    
+    # Returns true if and only if toi has the same utc_offset, std_offset
+    # and abbreviation as this TimezoneOffsetInfo.
+    def eql?(toi)
+      self == toi
+    end
+    
+    # Returns a hash of this TimezoneOffsetInfo.
+    def hash
+      utc_offset.hash ^ std_offset.hash ^ abbreviation.hash
+    end
+    
+    # Returns internal object state as a programmer-readable string.
+    def inspect
+      "#<#{self.class}: #@utc_offset,#@std_offset,#@abbreviation>"
+    end
+  end
+end