File: Debug.tcl

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#  Debug.tcl ---
#  
#      This file is part of The Coccinella application. 
#      It provides a few routines to help debugging.
#      
#  Copyright (c) 2004-2007  Mats Bengtsson
#  
#   This program 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.
#   
#   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
#  
# $Id: Debug.tcl,v 1.7 2007-07-19 06:28:18 matben Exp $

# If no debug printouts, no console.
if {$debugLevel == 0} {
    switch -- $this(platform) windows - macintosh - macosx {
	catch {console hide}
    }
}
	
# For debug purposes. Writing to log file can be helpful to trace infinite loops.
if {$debugLevel >= 6} {
    set fdLog [open [file join [file dirname [info script]] debug.log] w]
}
proc ::Debug {num str} {
    global  debugLevel fdLog
    if {$num <= $debugLevel} {
	if {[info exists fdLog]} {
	    puts $fdLog $str
	    flush $fdLog
	}
	puts $str
    }
}

proc ::CallTrace {num} {
    global  debugLevel
    if {$num <= $debugLevel} {
	puts "Tcl call trace:"
	for {set i [expr {[info level] - 1}]} {$i > 0} {incr i -1} {
	    puts "\t$i: [string range [info level $i] 0 80] ..."
	}
    }
}

set ::dbgt 0

#       You must initiate by setting its start value:
#         set ::t [clock clicks -milliseconds]

proc ::Timer {str} {
    if {$::dbgt} {
	puts "milliseconds ($str): [expr {[clock clicks -milliseconds]-$::t}]"
	set ::t [clock clicks -milliseconds]
	flush stdout
    }   
}

# Optional and custom designed.
if {0} {
    proc ::TraceVar {name1 name2 op} {
	puts "$name1 $name2 $op"
	CallTrace 4
    }

    # Add variable to trace here.
    namespace eval ::Jabber {}
    trace add variable ::Jabber::jstate(show) write TraceVar
}