Compare commits
17 Commits
Author | SHA1 | Date |
---|---|---|
Ash Moran | 50e2fbe843 | |
Ash Moran | 4745db500c | |
Ash Moran | 93cd84cd59 | |
Ash Moran | 31021f703f | |
Ash Moran | 50f610da4a | |
Andy Shipman | 037544bdb5 | |
Denis Knauf | 4700562b3e | |
Ash Moran | 676718c40f | |
Denis Knauf | 6c686eb2d3 | |
Denis Knauf | bfe13fcce8 | |
Denis Knauf | f6a10c9131 | |
Denis Knauf | d11eb016e5 | |
Ash Moran | 28275b71a8 | |
Ash Moran | c66c369df0 | |
Ash Moran | 28dcffcb35 | |
Ash Moran | 7a7a8a7db5 | |
Ash Moran | 6fc4c97bf3 |
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@ -0,0 +1,5 @@
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pkg
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*.gem
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*.gemspec
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rdoc
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*.rbc
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29
README.md
29
README.md
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@ -1,14 +1,14 @@
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Dependencies
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============
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You need first the [Bdb](http://github.com/DenisKnauf/bdb) and of course [ruby](http://ruby-lang.org).
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You need first the [Bdb](http://github.com/ruby-bdb/bdb) and of course [ruby](http://ruby-lang.org).
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Download
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========
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via git:
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git clone git://github.com/DenisKnauf/sbdb.git
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git clone git://github.com/ruby-bdb/sbdb
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Install
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=======
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@ -23,21 +23,22 @@ First, open environment and database
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require 'sbdb'
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Dir.mkdir 'newenv' rescue Errno::EEXIST
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env = SBDB::Env.new 'newenv', SBDB::CREATE
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db = env.open SBDB::Btree, 'newdb.db', :flags => SBDB::CREATE
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env = SBDB::Env.new 'newenv', SBDB::CREATE | SBDB::Env::INIT_TRANSACTION
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db = env.btree 'newdb.db', :flags => SBDB::CREATE
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It works nearly like a Ruby-Hash:
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db['key'] = 'value'
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db['key'] # => 'value'
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db.to_hash # => {'key'=>'value'}
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db.map {|k, v| [k, v].join ' => '} # => ["key => value"]
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db.count # => 1
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db['key'] # => 'value'
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db.to_hash # => {'key'=>'value'}
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db.map {|k, v| "k => v" } # => ["key => value"]
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db.count # => 1
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db.each {|k,v| puts "#{k}: #{v}" }
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SBDB::DB#each uses a SBDB::Cursor:
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`SBDB::DB#each` uses a `SBDB::Cursor`:
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cursor = db.cursor
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cursor.each {|k,v| puts "#{k}: ${v}" }
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cursor.each {|k,v| puts "#{k}: #{v}" }
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**Don't forget to close everything, you've opened!**
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@ -47,10 +48,14 @@ SBDB::DB#each uses a SBDB::Cursor:
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But you can use a *lambda* to ensure to close everything:
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SBDB::Env.new( 'newenv', SBDB::CREATE) do |env|
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SBDB::Env.new( 'newenv', SBDB::CREATE | SBDB::Env::INIT_TRANSACTION) do |env|
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env.open SBDB::Btree, 'newdb.db', :flags => SBDB::CREATE do |db|
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db.to_hash
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end
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end
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SBDB::DB#to_hash creates a cursor and close it later.
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`SBDB::DB#to_hash` creates a cursor and close it later.
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Tip:
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Signal.trap 'EXIT', env.method( :close)
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5
Rakefile
5
Rakefile
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@ -10,11 +10,12 @@ begin
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gem.summary = %Q{Simple Ruby Berkeley DB}
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gem.description = %Q{Simple Ruby Berkeley DB wrapper library for bdb.}
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gem.email = "Denis.Knauf@gmail.com"
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gem.homepage = "http://github.com/DenisKnauf/bdb"
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gem.homepage = "http://github.com/ruby-bdb/sbdb"
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gem.authors = ["Denis Knauf"]
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gem.files = %w[AUTHORS README.md VERSION lib/**/*.rb test/**/*.rb]
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gem.require_paths = %w[lib]
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gem.add_dependency 'dk-bdb'
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gem.add_dependency 'bdb', '>= 0.2.6.5'
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gem.add_dependency 'ref'
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end
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Jeweler::GemcutterTasks.new
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rescue LoadError
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@ -1,4 +1,5 @@
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require 'bdb'
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require 'ref'
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require 'sbdb/environment'
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require 'sbdb/db'
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require 'sbdb/cursor'
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@ -60,7 +60,11 @@ module SBDB
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def _txn txn
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txn ||= @txn
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txn && t.bdb_object
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txn && txn.bdb_object
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end
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def transaction flg = nil, &exe
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block_given? ? home.transaction( flg, &exe) : home.transaction( flg)
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end
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# Arguments:
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@ -1,5 +1,4 @@
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require 'bdb'
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require 'sbdb/weakhash'
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require 'sbdb/db'
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require 'sbdb/transaction'
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@ -61,7 +60,7 @@ module SBDB
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def initialize *args
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opts = ::Hash === args.last ? args.pop : {}
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opts = {:dir => args[0], :flags => args[1], :mode => args[2]}.update opts
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@dbs, @env = WeakHash.new, Bdb::Env.new( 0)
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@dbs, @env = Ref::WeakValueMap.new, Bdb::Env.new( 0)
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@env.log_config opts[:log_config], 1 if opts[:log_config]
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@env.lg_bsize = opts[:lg_bsize] if opts[:lg_bsize]
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@env.lg_max = opts[:lg_max] if opts[:lg_max]
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@ -1,61 +0,0 @@
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module SBDB
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# See http://eigenclass.org/hiki/deferred-finalizers-in-Ruby
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# Not threadsafe.
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class WeakHash
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attr_reader :cache
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def initialize cache = ::Hash.new
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@cache = cache
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@key_map = {}
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@rev_cache = ::Hash.new{|h,k| h[k] = {}}
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@reclaim_value = lambda do |value_id|
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if @rev_cache.has_key? value_id
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@rev_cache[value_id].each_key{|key| @cache.delete key}
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@rev_cache.delete value_id
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end
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end
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@reclaim_key = lambda do |key_id|
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@cache.delete @key_map.delete(key_id) if @key_map.has_key? key_id
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end
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end
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def []= key, value
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case key
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when Fixnum, Symbol, true, false
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key2 = key
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else
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key2 = key.dup
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end
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@rev_cache[value.object_id][key2] = true
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@cache[key2] = value.object_id
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@key_map[key.object_id] = key2
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ObjectSpace.define_finalizer(value, @reclaim_value)
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ObjectSpace.define_finalizer(key, @reclaim_key)
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value
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end
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def [] key
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value_id = @cache[key]
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return ObjectSpace._id2ref( value_id) unless value_id.nil?
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nil
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rescue RangeError
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nil
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end
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def each &e
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@cache.each do |k, vid|
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unless vid.nil?
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obj = begin
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ObjectSpace._id2ref vid
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rescue RangeError
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next
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end
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yield k, obj
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end
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end
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end
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end
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end
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48
sbdb.gemspec
48
sbdb.gemspec
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@ -1,48 +0,0 @@
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# Generated by jeweler
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# DO NOT EDIT THIS FILE DIRECTLY
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# Instead, edit Jeweler::Tasks in Rakefile, and run 'rake gemspec'
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# -*- encoding: utf-8 -*-
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Gem::Specification.new do |s|
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s.name = %q{sbdb}
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s.version = "0.0.10"
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s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
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s.authors = ["Denis Knauf"]
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s.date = %q{2011-08-01}
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s.description = %q{Simple Ruby Berkeley DB wrapper library for bdb.}
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s.email = %q{Denis.Knauf@gmail.com}
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s.extra_rdoc_files = [
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"LICENSE",
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"README.md"
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]
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s.files = [
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"AUTHORS",
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"README.md",
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"VERSION",
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"lib/sbdb.rb",
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"lib/sbdb/cursor.rb",
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"lib/sbdb/db.rb",
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"lib/sbdb/environment.rb",
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"lib/sbdb/transaction.rb",
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"lib/sbdb/weakhash.rb"
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]
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s.homepage = %q{http://github.com/DenisKnauf/bdb}
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s.require_paths = ["lib"]
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s.rubygems_version = %q{1.3.7}
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s.summary = %q{Simple Ruby Berkeley DB}
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if s.respond_to? :specification_version then
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current_version = Gem::Specification::CURRENT_SPECIFICATION_VERSION
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s.specification_version = 3
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if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
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s.add_runtime_dependency(%q<dk-bdb>, [">= 0"])
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else
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s.add_dependency(%q<dk-bdb>, [">= 0"])
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end
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else
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s.add_dependency(%q<dk-bdb>, [">= 0"])
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end
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end
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