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# TCL objectized library for PD api
# by Federico Ferri <mescalinum@gmail.com> - (C) 2007-2009
package provide pdlib 0.1
package require Tcl 8.5
set verbose 0
namespace eval ::pd {
proc error_msg {m} {
return "pdlib: [uplevel {lindex [info level 0] 0}]: error: $m"
}
proc add_inlet {self sel} {
if $::verbose {post [info level 0]}
variable _
tclpd_add_proxyinlet [tclpd_get_instance $self]
}
proc add_outlet {self sel} {
if $::verbose {post [info level 0]}
if {[lsearch -exact {bang float list symbol} $sel] == -1} {
return -code error [error_msg "unsupported selector: $sel"]
}
variable _
set o [outlet_new [tclpd_get_object $self] [gensym $sel]]
lappend _($self:x_outlet) $o
return $o
}
# used inside class for outputting some value
proc outlet {self n sel args} {
if $::verbose {post [info level 0]}
variable _
set outlet [lindex $_($self:x_outlet) $n]
switch -- $sel {
float {
set v [lindex $args 0]
outlet_float $outlet $v
}
symbol {
set v [lindex $args 0]
outlet_symbol $outlet $v
}
list {
set v [lindex $args 0]
set sz [llength $v]
set aa [new_atom_array $sz]
for {set i 0} {$i < $sz} {incr i} {
set_atom_array $aa $i [lindex $v $i]
}
outlet_list $outlet [gensym "list"] $sz $aa
delete_atom_array $aa $sz
}
bang {
outlet_bang $outlet
}
default {
return -code error [error_msg "unknown selector: $sel"]
}
}
}
# add a class method (that is: a proc named <class>_<sel>)
proc call_classmethod {classname self sel args} {
if $::verbose {post [info level 0]}
set m "${classname}_${sel}"
if {[llength [info commands "::$m"]] > 0} {
return [$m $self {*}$args]
}
}
# this handles the pd::class definition
proc class {classname def} {
if $::verbose {post [lrange [info level 0] 0 end-1]}
variable class_db
array set class_db {}
set class_db($classname:d_inlet) {}
set class_db($classname:d_outlet) {}
# strip comments:
set def2 [regsub -all -line {#.*$} $def {}]
set patchable_flag 1
set noinlet_flag 0
foreach {id arg} $def2 {
switch -- $id {
patchable {
if {$arg != 0 && $arg != 1} {
return -code error [error_msg "patchable must be 0/1"]
}
set patchable_flag $arg
}
noinlet {
if {$arg != 0 && $arg != 1} {
return -code error [error_msg "noinlet must be 0/1"]
}
set noinlet_flag $arg
}
default {
proc ::${classname}_${id} {self args} [concat "global _;" [regsub -all @(\\\$?\[\\w\\?\]+) $arg _(\$self:\\1)]]
}
}
}
# class level dispatcher (sort of class constructor)
proc ::$classname {self args} "
if \$::verbose {::pd::post \[info level 0\]}
::pd::call_classmethod $classname \$self constructor {*}\$args
# object dispatcher
proc ::\$self {selector args} \"
if \\\$::verbose {::pd::post \\\[info level 0\\\]}
::pd::call_classmethod $classname \$self \\\$selector {*}\\\$args
\"
return \$self
"
# TODO: c->c_gobj = (typeflag >= CLASS_GOBJ)
set flag [expr {
8 * ($noinlet_flag != 0) +
3 * ($patchable_flag != 0)
}]
# this wraps the call to class_new()
tclpd_class_new $classname $flag
}
# wrapper to post() withouth vargs
proc post {args} {
poststring2 [concat {*}$args]
}
proc assert= {a b} {
if {$a != $b} {
post "ASSERTION FAILED: \"$a\" == \"$b\""
return 0
}
return 1
}
proc args {} {
return [uplevel 1 "llength \$args"]
}
proc arg_float {n} {
set v [uplevel 1 "lindex \$args $n"]
foreach {selector value} $v {break}
assert= $selector "float"
return $value
}
proc arg_int {n} {
set v [uplevel 1 "lindex \$args $n"]
foreach {selector value} $v {break}
assert= $selector "float"
return [expr {int($value)}]
}
proc arg_symbol {n} {
set v [uplevel 1 "lindex \$args $n"]
foreach {selector value} $v {break}
assert= $selector "symbol"
return $value
}
}
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