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environment.rb
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environment.rb
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# Copyright (C) 2009-2013 MongoDB Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
module BSON
# Provides static helper methods around determining what environment is
# running without polluting the global namespace.
#
# @since 2.0.0
module Environment
extend self
# Determine if we are using JRuby or not.
#
# @example Are we running with JRuby?
# Environment.jruby?
#
# @return [ true, false ] If JRuby is our vm.
#
# @since 2.0.0
def jruby?
defined?(JRUBY_VERSION)
end
# Does the Ruby runtime we are using support ordered hashes?
#
# @example Does the runtime support ordered hashes?
# Environment.retaining_hash_order?
#
# @return [ true, false ] If the runtime has ordered hashes.
#
# @since 2.0.0
def retaining_hash_order?
jruby? || RUBY_VERSION > "1.9.1"
end
# Are we running in a ruby runtime that is version 1.8.x?
#
# @example Is the ruby runtime in 1.8 mode?
# Environment.ruby_18?
#
# @return [ true, false ] If we are running in 1.8.
#
# @since 2.0.0
def ruby_18?
RUBY_VERSION < "1.9"
end
end
end
# In the case where we don't have encoding, we need to monkey
# patch string to ignore the encoding directives.
#
# @since 2.0.0
if BSON::Environment.ruby_18?
# Making string in 1.8 respond like a 1.9 string, without any modifications.
#
# @since 2.0.0
class String
# Simply return the string when asking for it's character.
#
# @since 2.0.0
def chr; self; end
# Force the string to the provided encoding. NOOP.
#
# @since 2.0.0
def force_encoding(*); self; end
# Encode the string as the provided type. NOOP.
#
# @since 2.0.0
def encode(*); self; end
# Encode the string in place. NOOP.
#
# @since 2.0.0
def encode!(*); self; end
end
# No encoding error is defined in 1.8.
#
# @since 2.0.0
class EncodingError < RuntimeError; end
end