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# -*- Tcl -*-
#
# Define a basic set of predefined Tcl commands and definitions for
# the Next Scripting Framework. This file will be transformed by
# mk_predefined.tcl into "predefined.h", which in included in nsf.c.
#
# Copyright (C) 2009-2021 Gustaf Neumann
# Copyright (C) 2010 Stefan Sobernig
#
# The predefined code has to be split into 2 parts due to a string
# literal limitation in ISO C99, that requires compilers to support
# only strings up to 4095 bytes.
#
# This is part 1.
#
namespace eval ::nsf {
#
# get frequenly used primitiva into the ::nsf namespace
#
# Symbols reused in the next scripting language
namespace export \
next current self configure finalize interp is my relation dispatch
namespace eval ::nsf::method::create {namespace export alias}
#
# support for method provide and method require
#
proc ::nsf::method::provide {require_name definition {script ""}} {
set ::nsf::methodIndex($require_name) [list definition $definition script $script]
}
proc ::nsf::method::require {object name {per_object 0}} {
#
# On a method require, the optional script is evaluated and the
# "definition" gets inserted
# - on posiiton 1 the actual object
# - on posiiton 2 optionally "-per-object"
#
# The definition cmd must return the method handle.
#
set key ::nsf::methodIndex($name)
if {[info exists $key]} {
array set "" [set $key]
if {$(script) ne ""} {
eval $(script)
}
if {$per_object} {
set cmd [linsert $(definition) 1 -per-object]
return [eval [linsert $cmd 1 $object]]
} else {
return [eval [linsert $(definition) 1 $object]]
}
} else {
error "cannot require method $name for $object, method unknown"
}
}
#
# The following helper proc is used e.g. in OpenACS to pair
# introspection with nsf::procs.
#
::proc strip_proc_name {name} {
if {[string match ::nsf::procs::* $name]} {
return [string range $name 12 end]
} elseif {[string match nsf::procs::* $name]} {
return [string range $name 12 end]
} else {
return $name
}
}
#
# ::nsf::mixin
#
# Provide a similar interface as for ::nsf::method::create, ::nsf::method::alias,
# etc.. Semantically, ::nsf::mixin behaves like a "mixin add", but
# can be used as well for deleting the mixin list (empty last
# argument).
#
::nsf::proc ::nsf::mixin {object -per-object:switch classes} {
set rel [expr {${per-object} ? "object-mixin" : "class-mixin"}]
if {[lindex $classes 0] ne ""} {
set oldSetting [::nsf::relation::get $object $rel]
# use uplevel to avoid namespace surprises
uplevel [list ::nsf::relation::set $object $rel [linsert $oldSetting 0 $classes]]
} else {
uplevel [list ::nsf::relation::set $object $rel ""]
}
}
#
# provide some popular methods for "method require"
#
::nsf::method::provide autoname {::nsf::method::alias autoname ::nsf::methods::object::autoname}
::nsf::method::provide exists {::nsf::method::alias exists ::nsf::methods::object::exists}
::nsf::method::provide volatile {::nsf::method::alias volatile ::nsf::methods::object::volatile}
######################################################################
# unknown handler for objects and classes
#
proc ::nsf::object::unknown {name} {
foreach {key handler} [array get ::nsf::object::unknown] {
set result [uplevel [list {*}$handler $name]]
if {$result ne ""} {
return $result
}
}
return ""
}
namespace eval ::nsf::object::unknown {
proc add {key handler} {set ::nsf::object::unknown($key) $handler}
proc get {key} {return $::nsf::object::unknown($key)}
proc delete {key} {array unset ::nsf::object::unknown($key)}
proc keys {} {array names ::nsf::object::unknown}
}
# Example unknown handler:
# ::nsf::object::unknown::add xotcl {::xotcl::Class __unknown}
namespace eval ::nsf::argument {}
proc ::nsf::argument::unknown {args} {
#puts stderr "??? ::nsf::argument::unknown <$args> [info frame -1]"
return ""
}
######################################################################
# exit handlers
#
proc ::nsf::exithandler {args} {
lassign $args op value
switch $op {
set {::proc ::nsf::__exithandler {} $value}
get {::info body ::nsf::__exithandler}
unset {proc ::nsf::__exithandler args {;}}
default {error "syntax: ::nsf::exithandler $::nsf::parameter::syntax(::nsf::exithandler)"}
}
}
# initialize exit handler
::nsf::exithandler unset
#
# logger
#
if {[info command ::ns_log] ne ""} {
proc ::nsf::log {level msg} {
# The function might be called in situations in
# aolserver/NaviServer, where ns_log is not available.
if {[info command ::ns_log] ne ""} {
::ns_log $level "nsf: $msg"
} else {
puts stderr "$level: $msg"
}
}
} else {
proc ::nsf::log {level msg} {
puts stderr "$level: $msg"
}
}
#
# debug::call and debug::exit command
#
namespace eval ::nsf::debug {}
proc ::nsf::debug::call {level objectInfo methodInfo arglist} {
nsf::log Debug "call($level) - $objectInfo $methodInfo $arglist"
}
proc ::nsf::debug::exit {level objectInfo methodInfo result usec} {
nsf::log Debug "exit($level) - $objectInfo $methodInfo $usec usec -> $result"
}
#
# deprecated command
#
proc ::nsf::deprecated {what oldCmd newCmd} {
set msg "*** $what $oldCmd is deprecated."
if {$newCmd ne ""} {append msg " use $newCmd instead."}
#append msg "\n**\n"
nsf::log Warning $msg
}
#
# determine platform aware temp directory
#
proc tmpdir {} {
foreach e [list TMPDIR TEMP TMP] {
if {[info exists ::env($e)] \
&& [file isdirectory $::env($e)] \
&& [file writable $::env($e)]} {
return $::env($e)
}
}
if {$::tcl_platform(platform) eq "windows"} {
foreach d [list "C:\\TEMP" "C:\\TMP" "\\TEMP" "\\TMP"] {
if {[file isdirectory $d] && [file writable $d]} {
return $d
}
}
}
return /tmp
}
namespace export tmpdir
# if HOME is not set, and ~ is resolved, Tcl chokes on that
if {![info exists ::env(HOME)]} {set ::env(HOME) /root}
}
#
# Local variables:
# mode: tcl
# tcl-indent-level: 2
# indent-tabs-mode: nil
# End:
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