7 changed files with 753 additions and 33 deletions
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# -*- tcl -*- |
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# Maintenance Instruction: leave the 999999.xxx.x as is and use punkshell 'pmix make' or bin/punkmake to update from <pkg>-buildversion.txt |
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# module template: shellspy/src/decktemplates/vendor/punk/modules/template_module-0.0.3.tm |
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# |
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# Please consider using a BSD or MIT style license for greatest compatibility with the Tcl ecosystem. |
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# Code using preferred Tcl licenses can be eligible for inclusion in Tcllib, Tklib and the punk package repository. |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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# (C) CMcC 2010 |
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# |
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# @@ Meta Begin |
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# Application punk::trie 0.1.0 |
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# Meta platform tcl |
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# Meta license <unspecified> |
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# @@ Meta End |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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# doctools header |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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#*** !doctools |
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#[manpage_begin shellspy_module_punk::trie 0 0.1.0] |
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#[copyright "2010"] |
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#[titledesc {punk::trie API}] [comment {-- Name section and table of contents description --}] |
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#[moddesc {punk::trie}] [comment {-- Description at end of page heading --}] |
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#[require punk::trie] |
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#[keywords module datastructure trie] |
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#[description] tcl trie implementation courtesy of CmcC (tcl wiki) |
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#[para] - |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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#*** !doctools |
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#[section Overview] |
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#[para] overview of punk::trie |
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#[subsection Concepts] |
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#[para] - |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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## Requirements |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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#*** !doctools |
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#[subsection dependencies] |
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#[para] packages used by punk::trie |
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#[list_begin itemized] |
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package require Tcl 8.6- |
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#*** !doctools |
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#[item] [package {Tcl 8.6}] |
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# #package require frobz |
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# #*** !doctools |
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# #[item] [package {frobz}] |
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#*** !doctools |
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#[list_end] |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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#*** !doctools |
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#[section API] |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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# oo::class namespace |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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#tcl::namespace::eval punk::trie::class { |
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#*** !doctools |
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#[subsection {Namespace punk::trie::class}] |
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#[para] class definitions |
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#if {[tcl::info::commands [tcl::namespace::current]::interface_sample1] eq ""} { |
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#*** !doctools |
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#[list_begin enumerated] |
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# oo::class create interface_sample1 { |
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# #*** !doctools |
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# #[enum] CLASS [class interface_sample1] |
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# #[list_begin definitions] |
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# method test {arg1} { |
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# #*** !doctools |
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# #[call class::interface_sample1 [method test] [arg arg1]] |
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# #[para] test method |
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# puts "test: $arg1" |
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# } |
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# #*** !doctools |
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# #[list_end] [comment {-- end definitions interface_sample1}] |
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# } |
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#*** !doctools |
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#[list_end] [comment {--- end class enumeration ---}] |
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#} |
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#} |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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# Base namespace |
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# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
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tcl::namespace::eval punk::trie { |
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tcl::namespace::export {[a-z]*} ;# Convention: export all lowercase |
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#variable xyz |
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proc Dolog {lvl txt} { |
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#return "$lvl -- $txt" |
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#logger calls this in such a way that a straight uplevel can get us the vars/commands in messages substituted |
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set msg "[clock format [clock seconds] -format "%Y-%m-%dT%H:%M:%S"] punk::trie '[uplevel [list subst $txt]]'" |
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puts stderr $msg |
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} |
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package require logger |
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logger::initNamespace ::punk::trie |
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foreach lvl [logger::levels] { |
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interp alias {} ::punk::trie::Log_$lvl {} ::punk::trie::Dolog $lvl |
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log::logproc $lvl ::punk::trie::Log_$lvl |
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} |
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#namespace path ::punk::trie::log |
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#[para] class definitions |
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if {[tcl::info::commands [tcl::namespace::current]::trieclass] eq ""} { |
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#*** !doctools |
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#[list_begin enumerated] |
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oo::class create [tcl::namespace::current]::trieclass { |
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variable trie id |
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method matches {t what} { |
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#*** !doctools |
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#[call class::trieclass [method matches] [arg t] [arg what]] |
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#[para] search for longest prefix, return matching prefix, element and suffix |
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set matches {} |
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set wlen [string length $what] |
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foreach k [lsort -decreasing -dictionary [dict keys $t]] { |
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set klen [string length $k] |
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set match "" |
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for {set i 0} {$i < $klen |
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&& $i < $wlen |
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&& [string index $k $i] eq [string index $what $i] |
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} {incr i} { |
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append match [string index $k $i] |
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} |
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if {$match ne ""} { |
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lappend matches $match $k |
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} |
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} |
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#Debug.trie {matches: $what -> $matches} |
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::punk::trie::log::debug {matches: $what -> $matches} |
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if {[dict size $matches]} { |
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# find the longest matching prefix |
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set match [lindex [lsort -dictionary [dict keys $matches]] end] |
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set mel [dict get $matches $match] |
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set suffix [string range $what [string length $match] end] |
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return [list $match $mel $suffix] |
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} else { |
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return {} ;# no matches |
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} |
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} |
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# return next unique id if there's no proffered value |
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method id {value} { |
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if {$value} { |
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return $value |
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} else { |
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return [incr id] |
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} |
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} |
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# insert an element with a given optional value into trie |
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# along path given by $args (no need to specify) |
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method insert {what {value 0} args} { |
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if {[llength $args]} { |
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set t [dict get $trie {*}$args] |
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} else { |
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set t $trie |
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} |
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if {[dict exists $t $what]} { |
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#Debug.trie {$what is an exact match on path ($args $what)} |
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::punk::trie::log::debug {$what is an exact match on path ($args $what)} |
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if {[catch {dict size [dict get $trie {*}$args $what]} size]} { |
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# the match is a leaf - we're done |
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} else { |
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# the match is a dict - we have to add a null |
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dict set trie {*}$args $what "" [my id $value] |
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} |
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return ;# exact match - no change |
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} |
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# search for longest prefix |
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set match [my matches $t $what] |
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if {![llength $match]} { |
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;# no matching prefix - new element |
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#Debug.trie {no matching prefix of '$what' in $t - add it on path ($args $what)} |
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::punk::trie::log::debug {no matching prefix of '$what' in $t add it on path ($args $what)} |
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dict set trie {*}$args $what [my id $value] |
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return |
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} |
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lassign $match match mel suffix ;# prefix, element of match, suffix |
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if {$match ne $mel} { |
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# the matching element shares a prefix, but has a variant suffix |
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# it must be split |
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#Debug.trie {splitting '$mel' along '$match'} |
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::punk::trie::log::debug {splitting '$mel' along '$match'} |
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set melC [dict get $t $mel] |
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dict unset trie {*}$args $mel |
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dict set trie {*}$args $match [string range $mel [string length $match] end] $melC |
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} |
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if {[catch {dict size [dict get $trie {*}$args $match]} size]} { |
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# the match is a leaf - must be split |
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if {$match eq $mel} { |
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# the matching element shares a prefix, but has a variant suffix |
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# it must be split |
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#Debug.trie {splitting '$mel' along '$match'} |
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::punk::trie::log::debug {splitting '$mel' along '$match'} |
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set melC [dict get $t $mel] |
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dict unset trie {*}$args $mel |
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dict set trie {*}$args $match "" $melC |
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} |
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#Debug.trie {'$mel' is the longest prefix '$match' but was a leaf - insert '$suffix'} |
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::punk::trie::log::debug {'$mel' is the longest prefix '$match' but was a leaf - insert '$suffix'} |
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set melid [dict get $t $mel] |
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dict set trie {*}$args $match $suffix [my id $value] |
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} else { |
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# it's a dict - keep searching |
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#Debug.trie {'$mel' is the longest prefix '$match' and is a dict - search for '$suffix' on path ($args $match)} |
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::punk::trie::log::debug {'$mel' is the longest prefix '$match' and is a dict - search for '$suffix' on path ($args $match)} |
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my insert $suffix $value {*}$args $match |
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} |
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return |
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} |
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# find a path matching an element $what |
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# if the element's not found, return the nearest path |
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method find_path {what args} { |
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if {[llength $args]} { |
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set t [dict get $trie {*}$args] |
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} else { |
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set t $trie |
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} |
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if {[dict exists $t $what]} { |
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#Debug.trie {$what is an exact match on path ($args $what)} |
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return [list {*}$args $what] ;# exact match - no change |
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} |
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# search for longest prefix |
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set match [my matches $t $what] |
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if {![llength $match]} { |
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return $args |
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} |
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lassign $match match mel suffix ;# prefix, element of match, suffix |
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if {$match ne $mel} { |
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# the matching element shares a prefix, but has a variant suffix |
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# no match |
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return $args |
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} |
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if {[catch {dict size [dict get $trie {*}$args $match]} size] || $size == 0} { |
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# got to a non-matching leaf - no match |
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return $args |
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} else { |
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# it's a dict - keep searching |
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#Debug.trie {'$mel' is the longest prefix '$match' and is a dict - search for '$suffix' on path ($args $match)} |
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return [my find_path $suffix {*}$args $match] |
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} |
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} |
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# given a trie, which may have been modified by deletion, |
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# optimize it by removing empty nodes and coalescing singleton nodes |
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method optimize {args} { |
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if {[llength $args]} { |
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set t [dict get $trie {*}$args] |
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} else { |
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set t $trie |
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} |
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if {[catch {dict size $t} size]} { |
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#Debug.trie {optimize leaf '$t' along '$args'} |
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::punk::trie::log::debug {optimize leaf '$t' along '$args'} |
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# leaf - leave it |
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} else { |
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switch -- $size { |
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0 { |
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#Debug.trie {optimize empty dict ($t) along '$args'} |
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::punk::trie::log::debug {optimize empty dict ($t) along '$args'} |
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if {[llength $args]} { |
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dict unset trie {*}$args |
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} |
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} |
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1 { |
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#Debug.trie {optimize singleton dict ($t) along '$args'} |
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::punk::trie::log::debug {optimize singleton dict ($t) along '$args'} |
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lassign $t k v |
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if {[llength $args]} { |
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dict unset trie {*}$args |
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} |
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append args $k |
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if {[llength $v]} { |
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dict set trie {*}$args $v |
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} |
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my optimize {*}$args |
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} |
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default { |
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#Debug.trie {optimize dict ($t) along '$args'} |
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::punk::trie::log::debug {optimize dict ($t) along '$args'} |
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dict for {k v} $t { |
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my optimize {*}$args $k |
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} |
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} |
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} |
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} |
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} |
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# delete element $what from trie |
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method delete {what} { |
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set path [my find_path $what] |
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if {[join $path ""] eq $what} { |
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#Debug.trie {del '$what' along ($path) was [dict get $trie {*}$path]} |
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if {[catch {dict size [dict get $trie {*}$path]} size]} { |
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# got to a matching leaf - delete it |
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dict unset trie {*}$path |
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set path [lrange $path 0 end-1] |
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} else { |
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dict unset trie {*}$path "" |
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} |
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my optimize ;# remove empty and singleton elements |
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} else { |
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# nothing to delete, guess we're done |
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} |
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} |
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# find the value of element $what in trie, |
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# error if not found |
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method find_or_error {what} { |
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set path [my find_path $what] |
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if {[join $path ""] eq $what} { |
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if {[catch {dict size [dict get $trie {*}$path]} size]} { |
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# got to a matching leaf - done |
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return [dict get $trie {*}$path] |
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} else { |
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#JMN - what could be an exact match for a path, but not be in the trie itself |
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if {[dict exists $trie {*}$path ""]} { |
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return [dict get $trie {*}$path ""] |
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} else { |
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::punk::trie::log::debug {'$what' matches a path but is not a leaf} |
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error "'$what' not found" |
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} |
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} |
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} else { |
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error "'$what' not found" |
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} |
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} |
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#JMN - renamed original find to find_or_error |
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#prefer not to catch on result - but test for -1 |
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method find {what} { |
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set path [my find_path $what] |
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if {[join $path ""] eq $what} { |
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#presumably we use catch and dict size to avoid llength shimmering large inner dicts to list rep |
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if {[catch {dict size [dict get $trie {*}$path]} size]} { |
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# got to a matching leaf - done |
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return [dict get $trie {*}$path] |
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} else { |
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#JMN - what could be an exact match for a path, but not be in the trie itself |
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if {[dict exists $trie {*}$path ""]} { |
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return [dict get $trie {*}$path ""] |
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} else { |
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::punk::trie::log::debug {'$what' matches a path but is not a leaf} |
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return -1 |
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} |
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} |
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} else { |
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return -1 |
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} |
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} |
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# dump the trie as a string |
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method dump {} { |
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return $trie |
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} |
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# return a string rep of the trie sorted in dict order |
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method order {{t {}}} { |
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if {![llength $t]} { |
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set t $trie |
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} elseif {[llength $t] == 1} { |
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return $t |
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} |
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set acc {} |
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foreach key [lsort -dictionary [dict keys $t]] { |
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lappend acc $key [my order [dict get $t $key]] |
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} |
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return $acc |
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} |
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# return the trie as a dict of names with values |
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method flatten {{t {}} {prefix ""}} { |
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if {![llength $t]} { |
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set t $trie |
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} elseif {[llength $t] == 1} { |
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return [list $prefix $t] |
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} |
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set acc {} |
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foreach key [dict keys $t] { |
||||||
|
lappend acc {*}[my flatten [dict get $t $key] $prefix$key] |
||||||
|
} |
||||||
|
return $acc |
||||||
|
} |
||||||
|
|
||||||
|
#shortest possible string to identify an element in the trie using the same principle as tcl::prefix::match |
||||||
|
#ie if a stored word is a prefix of any other words - it must be fully specified to identify itself. |
||||||
|
#JMN - REVIEW - better algorithms? |
||||||
|
#caller having retained all members can avoid flatten call |
||||||
|
#by selecting a single 'which' known not to be in the trie (or empty string) - all idents can be returned. |
||||||
|
#when all 'which' members are in the tree - scanning stops when they're all found |
||||||
|
# - and a dict containing result and scanned keys is returned |
||||||
|
# - result contains a dict with keys for each which member |
||||||
|
# - scanned contains a dict of all words longer than our shortest which - (and a subset of words the same length) |
||||||
|
method shortest_idents {which {allmembers {}}} { |
||||||
|
set t $trie |
||||||
|
if {![llength $allmembers]} { |
||||||
|
set members [dict keys [my flatten]] |
||||||
|
} else { |
||||||
|
set members $allmembers |
||||||
|
} |
||||||
|
set len_members [lmap m $members {list [string length $m] $m}] |
||||||
|
set longestfirst [lsort -index 0 -integer -decreasing $len_members] |
||||||
|
set longestfirst [lmap v $longestfirst {lindex $v 1}] |
||||||
|
set taken [dict create] |
||||||
|
set scanned [dict create] |
||||||
|
set result [dict create] ;#words in our which list - if found |
||||||
|
foreach w $longestfirst { |
||||||
|
set path [my find_path $w] |
||||||
|
if {[dict exists $taken $w]} { |
||||||
|
#whole word - no unique prefix |
||||||
|
dict set scanned $w $w |
||||||
|
if {$w in $which} { |
||||||
|
#puts stderr "$w -> $w" |
||||||
|
dict set result $w $w |
||||||
|
if {[dict size $result] == [llength $which]} { |
||||||
|
return [dict create result $result scanned $scanned] |
||||||
|
} |
||||||
|
} |
||||||
|
continue |
||||||
|
} |
||||||
|
set acc "" |
||||||
|
foreach p [lrange $path 0 end-1] { |
||||||
|
dict set taken [append acc $p] 1 ;#no need to test first - just set even though may already be present |
||||||
|
} |
||||||
|
append acc [string index [lindex $path end] 0] |
||||||
|
dict set scanned $w $acc ;#sorted by length - so no other can have this prefix - and no longer necessary |
||||||
|
if {$w in $which} { |
||||||
|
#puts stderr "$w -> $acc" |
||||||
|
dict set result $w $acc |
||||||
|
if {[dict size $result] == [llength $which]} { |
||||||
|
return [dict create result $result scanned $scanned] |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
return [dict create result $result scanned $scanned] |
||||||
|
} |
||||||
|
|
||||||
|
# overwrite the trie |
||||||
|
method set {t} { |
||||||
|
set trie $t |
||||||
|
} |
||||||
|
|
||||||
|
constructor {args} { |
||||||
|
set trie {} |
||||||
|
set id 0 |
||||||
|
foreach a $args { |
||||||
|
my insert $a |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
set testlist [list blah x black blacken] |
||||||
|
proc test1 {} { |
||||||
|
#JMN |
||||||
|
#test that find_or_error of a path that isn't stored as a value returns an appropriate error |
||||||
|
#(used to report couldn't find dict key "") |
||||||
|
set t [punk::trie::trieclass new blah x black blacken] |
||||||
|
if {[catch {$t find_or_error bla} errM]} { |
||||||
|
puts stderr "should be error indicating 'bla' not found" |
||||||
|
puts stderr "err during $t find bla\n$errM" |
||||||
|
} |
||||||
|
return $t |
||||||
|
} |
||||||
|
|
||||||
|
|
||||||
|
# oo::class create interface_sample1 { |
||||||
|
# #*** !doctools |
||||||
|
# #[enum] CLASS [class interface_sample1] |
||||||
|
# #[list_begin definitions] |
||||||
|
|
||||||
|
# method test {arg1} { |
||||||
|
# #*** !doctools |
||||||
|
# #[call class::interface_sample1 [method test] [arg arg1]] |
||||||
|
# #[para] test method |
||||||
|
# puts "test: $arg1" |
||||||
|
# } |
||||||
|
|
||||||
|
# #*** !doctools |
||||||
|
# #[list_end] [comment {-- end definitions interface_sample1}] |
||||||
|
# } |
||||||
|
|
||||||
|
#*** !doctools |
||||||
|
#[list_end] [comment {--- end class enumeration ---}] |
||||||
|
} |
||||||
|
|
||||||
|
#*** !doctools |
||||||
|
#[subsection {Namespace punk::trie}] |
||||||
|
#[para] Core API functions for punk::trie |
||||||
|
#[list_begin definitions] |
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#proc sample1 {p1 n args} { |
||||||
|
# #*** !doctools |
||||||
|
# #[call [fun sample1] [arg p1] [arg n] [opt {option value...}]] |
||||||
|
# #[para]Description of sample1 |
||||||
|
# #[para] Arguments: |
||||||
|
# # [list_begin arguments] |
||||||
|
# # [arg_def tring p1] A description of string argument p1. |
||||||
|
# # [arg_def integer n] A description of integer argument n. |
||||||
|
# # [list_end] |
||||||
|
# return "ok" |
||||||
|
#} |
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#*** !doctools |
||||||
|
#[list_end] [comment {--- end definitions namespace punk::trie ---}] |
||||||
|
} |
||||||
|
# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
||||||
|
|
||||||
|
|
||||||
|
# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
||||||
|
# Secondary API namespace |
||||||
|
# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
||||||
|
tcl::namespace::eval punk::trie::lib { |
||||||
|
tcl::namespace::export {[a-z]*} ;# Convention: export all lowercase |
||||||
|
tcl::namespace::path [tcl::namespace::parent] |
||||||
|
#*** !doctools |
||||||
|
#[subsection {Namespace punk::trie::lib}] |
||||||
|
#[para] Secondary functions that are part of the API |
||||||
|
#[list_begin definitions] |
||||||
|
|
||||||
|
#proc utility1 {p1 args} { |
||||||
|
# #*** !doctools |
||||||
|
# #[call lib::[fun utility1] [arg p1] [opt {?option value...?}]] |
||||||
|
# #[para]Description of utility1 |
||||||
|
# return 1 |
||||||
|
#} |
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#*** !doctools |
||||||
|
#[list_end] [comment {--- end definitions namespace punk::trie::lib ---}] |
||||||
|
} |
||||||
|
# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
||||||
|
#*** !doctools |
||||||
|
#[section Internal] |
||||||
|
#tcl::namespace::eval punk::trie::system { |
||||||
|
#*** !doctools |
||||||
|
#[subsection {Namespace punk::trie::system}] |
||||||
|
#[para] Internal functions that are not part of the API |
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#} |
||||||
|
# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ |
||||||
|
## Ready |
||||||
|
package provide punk::trie [tcl::namespace::eval punk::trie { |
||||||
|
variable pkg punk::trie |
||||||
|
variable version |
||||||
|
set version 0.1.0 |
||||||
|
}] |
||||||
|
return |
||||||
|
|
||||||
|
#*** !doctools |
||||||
|
#[manpage_end] |
||||||
|
|
||||||
Loading…
Reference in new issue