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begin
require 'bdb'
rescue Exception => e
puts "Got exception: "+e
puts "rbot couldn't load the bdb module, perhaps you need to install it? try: http://www.ruby-lang.org/en/raa-list.rhtml?name=bdb"
exit 2
end
# make BTree lookups case insensitive
module BDB
class CIBtree < Btree
def bdb_bt_compare(a, b)
a.downcase <=> b.downcase
end
end
end
module Irc
# DBHash is for tying a hash to disk (using bdb).
# Call it with an identifier, for example "mydata". It'll look for
# mydata.db, if it exists, it will load and reference that db.
# Otherwise it'll create and empty db called mydata.db
class DBHash
# absfilename:: use +key+ as an actual filename, don't prepend the bot's
# config path and don't append ".db"
def initialize(bot, key, absfilename=false)
@bot = bot
@key = key
if absfilename && File.exist?(key)
# db already exists, use it
@db = DBHash.open_db(key)
elsif File.exist?(@bot.botclass + "/#{key}.db")
# db already exists, use it
@db = DBHash.open_db(@bot.botclass + "/#{key}.db")
elsif absfilename
# create empty db
@db = DBHash.create_db(key)
else
# create empty db
@db = DBHash.create_db(@bot.botclass + "/#{key}.db")
end
end
def method_missing(method, *args, &block)
return @db.send(method, *args, &block)
end
def DBHash.create_db(name)
debug "DBHash: creating empty db #{name}"
return BDB::Hash.open(name, nil,
BDB::CREATE | BDB::EXCL, 0600)
end
def DBHash.open_db(name)
debug "DBHash: opening existing db #{name}"
return BDB::Hash.open(name, nil, "r+", 0600)
end
end
# DBTree is a BTree equivalent of DBHash, with case insensitive lookups.
class DBTree
@@env=nil
# absfilename:: use +key+ as an actual filename, don't prepend the bot's
# config path and don't append ".db"
def initialize(bot, key, absfilename=false)
@bot = bot
@key = key
if @@env.nil?
#@@env = BDB::Env.open("#{@bot.botclass}", BDB::INIT_TRANSACTION | BDB::CREATE | BDB::RECOVER)
@@env = BDB::Env.open("#{@bot.botclass}", BDB::CREATE | BDB::INIT_MPOOL | BDB::RECOVER)
end
if absfilename && File.exist?(key)
# db already exists, use it
@db = DBTree.open_db(key)
elsif absfilename
# create empty db
@db = DBTree.create_db(key)
elsif File.exist?(@bot.botclass + "/#{key}.db")
# db already exists, use it
@db = DBTree.open_db(@bot.botclass + "/#{key}.db")
else
# create empty db
@db = DBTree.create_db(@bot.botclass + "/#{key}.db")
end
end
def method_missing(method, *args, &block)
return @db.send(method, *args, &block)
end
def DBTree.create_db(name)
debug "DBTree: creating empty db #{name}"
return BDB::CIBtree.open(name, nil,
BDB::CREATE | BDB::EXCL,
0600, "env" => @@env)
end
def DBTree.open_db(name)
debug "DBTree: opening existing db #{name}"
return BDB::CIBtree.open(name, nil,
"r+", 0600, "env" => @@env)
end
end
end
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