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proc coverage example
Other Facilities in Tcl example from a Well House Consultants training course
More on Other Facilities in Tcl [link]
Source code: times Module: T214
# Provision of a simple coverage map in Tcl # Shows how you can find the number of calls made to each proc in your code # Globals needed during coverage analysis # (Have to use globals as we cannot change arguments) # Namespace resolution needs adding if you use namepaces set call_order "" set procnames "" # Define here any procs that we do NOT want analysed, such as our own ones relating to coverage proc report {} { global call_order foreach call $call_order { incr callcounter($call) } puts [format "\n%20s %5s" "proc name" count] puts [format "%20s %5s" --------- -----] # change to loop through procnames if you want to include procs not called foreach fn [array names callcounter] { puts [format "%20s %5d" $fn $callcounter($fn)] } } # Hide the original proc command and write a new one # which wraps (decorates) the original with our coverage code rename proc my_proc my_proc proc {name arglist body} { # stuff to log as we apply the wrapping # (making note of all the names of the things we wrap global procnames lappend procnames $name # Within the body, add in extra code to note each call made # This is a bit crude - simply a long list of calls # Use of quotes rather than braces to ensure dollar expansion at the right time # semicolon to end statements, as backslash-return become a space not a return my_proc $name $arglist " \ global call_order; \ lappend call_order $name; \ $body \ " } # ------------------------------------------------------------------------ # The application proc area {a b} { # area of rectangular table return [expr $a * $b] } proc circum {a b} { # circumference of rectangular table return [expr 2 * ($a + $b)] } proc doggydistance {a b} { # Shortest distance from edge to middle of table set closest [expr (($a > $b) ? $b : $a) / 2.0] return $closest } set a [area 100 200] set b [circum 100 200] set b [circum 100 200] set b [circum 100 200] set b [circum 100 200] puts $a puts $b # --------------------------------------------------------- # Reporting on coverage after it's run puts "-------------------------------" puts "\n** List of calls made in order" puts $call_order puts "\n** Counts of calls to each wrapped proc" report puts "\n** List of procs wrapped" puts $procnames # ------------------------------------------------------ # Sample Output # WomanWithCat:demo grahamellis$ tclsh times # 20000 # 600 # ------------------------------- # # ** List of calls made in order # area circum circum circum circum # # ** Counts of calls to each wrapped proc # # proc name count # --------- ----- # area 1 # circum 4 # # ** List of procs wrapped # area circum doggydistance # WomanWithCat:demo grahamellis$ Learn about this subject
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This example comes from our "Other Facilities in Tcl" training module. You'll find a description of the topic and some
other closely related examples on the "Other Facilities in Tcl" module index page.
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