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# (c) 2008 Steve Bennett <steveb@workware.net.au>
#
# Implements a Tcl-compatible array command based on dict
#
# The FreeBSD license
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials
# provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE JIM TCL PROJECT ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# JIM TCL PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and documentation
# are those of the authors and should not be interpreted as representing
# official policies, either expressed or implied, of the Jim Tcl Project.
package provide array 1.0
proc array {subcmd arrayname args} {
# $name is the name of the array in the caller's context
upvar $arrayname name
if {$subcmd eq "exists"} {
return [info exists name]
}
if {![info exists name]} {
set name [dict create]
}
switch $subcmd {
set {
# The argument should be a list, but we also
# support name value pairs
if {[llength $args] == 1} {
set args [lindex $args 0]
}
foreach {key value} $args {
dict set name $key $value
}
return $name
}
size {
return [/ [llength $name] 2]
}
}
# The remaining options take a pattern
if {[llength $args] > 0} {
set pattern [lindex $args 0]
} else {
set pattern *
}
switch $subcmd {
names {
set keys {}
foreach {key value} $name {
if {[string match $pattern $key]} {
lappend keys $key
}
}
return $keys
}
get {
set list {}
foreach {key value} $name {
if {[string match $pattern $key]} {
lappend list $key $value
}
}
return $list
}
unset {
foreach {key value} $name {
if {[string match $pattern $key]} {
dict unset name $key
}
}
return
}
}
# Tcl-compatible error message
error "bad option \"$subcmd\": must be exists, get, names, set, size, or unset"
}
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