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# $Id: dbg.rb,v 1.30 2010/06/23 12:03:59 chabannf Exp $
#
# CONTACT : zonecheck@nic.fr
# AUTHOR : Stephane D'Alu <sdalu@nic.fr>
#
# CREATED : 2002/09/16 13:31:29
# REVISION : $Revision: 1.30 $
# DATE : $Date: 2010/06/23 12:03:59 $
#
# CONTRIBUTORS: (see also CREDITS file)
#
#
# LICENSE : GPL v3
# COPYRIGHT : AFNIC (c) 2003
#
# This file is part of ZoneCheck.
#
# ZoneCheck is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# ZoneCheck is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with ZoneCheck; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
module ZoneCheck
require 'thread'
##
## Debugging
##
class DBG
#
# Debugging types
#
INIT = 0x0001 # Initialisation
LOCALE = 0x0002 # Localization / Internationalisation
CONFIG = 0x0004 # Configuration
AUTOCONF = 0x0008 # Autoconf
LOADING = 0x0010 # Loading tests
TESTS = 0x0020 # Tests performed
TESTDBG = 0x0040 # Debugging messages from tests
CACHE_INFO = 0x0400 # Information about cached object
DBG = 0x0800 # Debugger itself
CRAZYDEBUG = 0x1000 # Crazy Debug, don't try it...
DNSRUBY = 0x2000 # Dnsruby debugging messages
NOCACHE = 0x4000 # Disable caching
DONT_RESCUE = 0x8000 # Don't try to rescue exceptions
#
# Tag associated with some types
#
Tag = {
INIT => 'init',
LOCALE => 'locale',
CONFIG => 'config',
AUTOCONF => 'autoconf',
LOADING => 'loading',
TESTS => 'tests',
TESTDBG => 'testdbg',
CACHE_INFO => 'cache',
DBG => 'dbg'
}
#
# Initializer
#
def initialize(lvl=0, output=$stderr)
@output = output
@lvl = lvl
@mutex = Mutex::new
@old_messages = []
msg(DBG) { "Debugger initialized at level %0x" % @lvl }
end
#
# Test if debug is enabled for that type
#
def enabled?(type)
@lvl & type != 0
end
alias [] enabled?
#
# Enable debugging for the specified type
#
def []=(type, enable)
self.level = enable ? @lvl | type : @lvl & ~type
end
#
# Change debugging level
#
def level=(lvl)
old_crazydebug = enabled?(CRAZYDEBUG)
old_dnsruby = enabled?(DNSRUBY)
# parsing
case lvl
when String then @lvl = lvl =~ /^0x/ ? lvl.hex : lvl.to_i
when Fixnum then @lvl = lvl
else raise ArgumentError, "unable to interprete: #{lvl}"
end
# message
msg(DBG) { "Setting level to 0x%0x" % lvl }
# enable/disable Dnsruby
if enabled?(DNSRUBY) ^ old_dnsruby
Dnsruby::TheLog.level = Logger::DEBUG if enabled?(DNSRUBY)
end
# enable/disable CrazyDebug
if enabled?(CRAZYDEBUG) ^ old_crazydebug
dbgfunc = if enabled?(CRAZYDEBUG)
proc { |event, file, line, id, binding, classname|
@output.printf "%8s %s:%-2d %10s %8s\n",
event, file, line, id, classname }
else
nil
end
set_trace_func(dbgfunc)
end
failed_messages = @old_messages
@mutex.synchronize {
@old_messages = []
}
failed_messages.each {|type,msg|
msg(type,msg) unless msg.nil?
}
end
#
# Print debugging message
# WARN: It is adviced to use a block instead of the string
# second argument, as this will provide a lazy evaluation
#
def msg(type, arg=nil)
unless block_given? ^ !arg.nil?
raise ArgumentError, 'either string or block should be given'
end
arg = yield if block_given?
arg = arg.to_s
unless enabled?(type)
@mutex.synchronize {
@old_messages << [type,arg]
}
return
end
@mutex.synchronize {
case arg
when Array
case arg.size
when 0
raise ArgumentError, 'the array argument must not be empty'
when 1
@output.puts "DBG[#{Tag[type]}]: #{arg[0]}"
else
tag = "DBG[#{Tag[type]}]"
tagfiller = " " * tag.size
@output.puts "#{tag}: #{arg[0]}"
arg[1..-1].each { |l|
@output.puts "#{tagfiller}| #{l}" }
end
else
@output.puts "DBG[#{Tag[type]}]: #{arg}"
end
}
end
def self.status2str(status, ok=true)
case status
when FalseClass, TrueClass then status == ok ? 'passed' : 'failed'
when NilClass, Exception then 'exception'
else 'n/a'
end
end
end
end
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