Is there a standard/popular parser for .ini style configuration file parsers? If not, here is one that I use. It doesn't write config files, but does read them into arrays named by config file section.
-- Todd Coram
namespace eval cfg {
variable version 1.0
variable sections [list DEFAULT]
variable cursection DEFAULT
variable DEFAULT; # DEFAULT section
}
proc cfg::sections {} {
return $cfg::sections
}
proc cfg::variables {{section DEFAULT}} {
return [array names ::cfg::$section]
}
proc cfg::add_section {str} {
variable sections
variable cursection
set cursection [string trim $str \[\]]
if {[lsearch -exact $sections $cursection] == -1} {
lappend sections $cursection
variable ::cfg::${cursection}
}
}
proc cfg::setvar {varname value {section DEFAULT}} {
variable sections
if {[lsearch -exact $sections $section] == -1} {
cfg::add_section $section
}
set ::cfg::${section}($varname) $value
}
proc cfg::getvar {varname {section DEFAULT}} {
variable sections
if {[lsearch -exact $sections $section] == -1} {
error "No such section: $section"
}
return [set ::cfg::${section}($varname)]
}
proc cfg::parse_file {filename} {
variable sections
variable cursection
set line_no 1
set fd [open $filename r]
while {![eof $fd]} {
set line [string trim [gets $fd] " "]
if {$line == ""} continue
switch -regexp -- $line {
^#.* { }
^\\[.*\\]$ {
cfg::add_section $line
}
.*=.* {
set pair [split $line =]
set name [string trim [lindex $pair 0] " "]
set value [string trim [lindex $pair 1] " "]
cfg::setvar $name $value $cursection
}
default {
error "Error parsing $filename (line: $line_no): $line"
}
}
incr line_no
}
close $fd
}Given: (startup.ini)
# a DEFAULT attribute # debug=true [EMAIL] from_addr = [email protected] to_addr = [email protected] [DEFAULT] trace_level = 5
Here is how you can use it:
cfg::parse_file startup.ini set dbg $cfg::DEFAULT(debug) set dbg [cfg::getvar debug DEFAULT] puts "email comes from $cfg::EMAIL(from_addr)"
Removed unneeded $ characters and added missing and " characters to get the script working. -- George H. Lewis
There also is an inifile parser in Tcllib. MHo: And another on here: One more inifile parser, including test and documentation.
David Easton 19 Mar 2004 - I had a need for reading and writing config files within a metakit virtual filesystem. Unfortunately the Tcllib inifile parser was not suitable due to the access specifiers used with the config file. I came up with the Snit cfg package to get around these problems.
AMG: Here's another approach: Config file using slave interp