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#
# profrep  --
#
# Generate Tcl profiling reports.
#------------------------------------------------------------------------------
# Copyright 1992-1999 Karl Lehenbauer and Mark Diekhans.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted, provided
# that the above copyright notice appear in all copies.  Karl Lehenbauer and
# Mark Diekhans make no representations about the suitability of this
# software for any purpose.  It is provided "as is" without express or
# implied warranty.
#------------------------------------------------------------------------------
# $Id: profrep.tcl,v 1.1 2001/10/24 23:31:48 hobbs Exp $
#------------------------------------------------------------------------------
#

#@package: TclX-profrep profrep

namespace eval TclXProfRep {

    #
    # Convert the profile array from entries that have only the time spent in
    # the proc to the time spend in the proc and all it calls.
    #
    proc sum {inDataVar outDataVar} {
        upvar 1 $inDataVar inData $outDataVar outData

        foreach inStack [array names inData] {
            for {set idx 0} {![lempty [set part [lrange $inStack $idx end]]]} \
                    {incr idx} {
                if ![info exists outData($part)] {
                    set outData($part) {0 0 0}
                }
                lassign $outData($part) count real cpu
                if {$idx == 0} {
                    incr count [lindex $inData($inStack) 0]
                }
                incr real [lindex $inData($inStack) 1]
                incr cpu [lindex $inData($inStack) 2]
                set outData($part) [list $count $real $cpu]
            }
        }
    }

    #
    # Do sort comparison.  May only be called by sort, as it address its
    # local variables.
    #
    proc sortcmp {key1 key2} {
        upvar profData profData keyIndex keyIndex

        set val1 [lindex $profData($key1) $keyIndex]
        set val2 [lindex $profData($key2) $keyIndex]

        if {$val1 < $val2} {
            return -1
        }
        if {$val1 > $val2} {
            return 1
        }
        return 0
    }

    #
    # Generate a list, sorted in descending order by the specified key, contain
    # the indices into the summarized data.
    #
    proc sort {profDataVar sortKey} {
        upvar $profDataVar profData

        case $sortKey {
            {calls} {set keyIndex 0}
            {real}  {set keyIndex 1}
            {cpu}   {set keyIndex 2}
            default {
                error "Expected a sort type of: `calls', `cpu' or ` real'"
            }
        }

        return [lsort -integer -decreasing -command sortcmp \
                [array names profData]]
    }

    #
    # Print the sorted report
    #
    proc print {profDataVar sortedProcList outFile userTitle} {
        upvar $profDataVar profData

        set maxNameLen 0
        foreach procStack [array names profData] {
            foreach procName $procStack {
                set maxNameLen [max $maxNameLen [clength $procName]]
            }
        }

        if {$outFile == ""} {
            set outFH stdout
        } else {
            set outFH [open $outFile w]
        }

        # Output a header.

        set stackTitle "Procedure Call Stack"
        set maxNameLen [max [expr $maxNameLen+6] [expr [clength $stackTitle]+4]]
        set hdr [format "%-${maxNameLen}s %10s %10s %10s" $stackTitle \
                        "Calls" "Real Time" "CPU Time"]
        if {$userTitle != ""} {
            puts $outFH [replicate - [clength $hdr]]
            puts $outFH $userTitle
        }
        puts $outFH [replicate - [clength $hdr]]
        puts $outFH $hdr
        puts $outFH [replicate - [clength $hdr]]

        # Output the data in sorted order.  Trim leading ::.

        foreach procStack $sortedProcList {
            set data $profData($procStack)
            set cmd [lvarpop procStack]
            regsub {^::} $cmd {} cmd
            puts $outFH [format "%-${maxNameLen}s %10d %10d %10d" \
                                $cmd [lindex $data 0] [lindex $data 1] \
                                [lindex $data 2]]
            foreach procName $procStack {
                if {$procName == "<global>"} break
                regsub {^::} $procName {} procName
                puts $outFH "    $procName"
            }
        }
        if {$outFile != ""} {
            close $outFH
        }
    }

} ;# TclXProfRep

#------------------------------------------------------------------------------
# Generate a report from data collect from the profile command.
#   o profDataVar (I) - The name of the array containing the data from profile.
#   o sortKey (I) - Value to sort by. One of "calls", "cpu" or "real".
#   o outFile (I) - Name of file to write the report to.  If omitted, stdout
#     is assumed.
#   o userTitle (I) - Title line to add to output.

proc profrep {profDataVar sortKey {outFile {}} {userTitle {}}} {
    upvar $profDataVar profData

    TclXProfRep::sum profData sumProfData
    set sortedProcList [TclXProfRep::sort sumProfData $sortKey]
    TclXProfRep::print sumProfData $sortedProcList $outFile $userTitle
}