Recfile is the
file format used by
GNU Recutils
. It can be seen as a "vertical" counterpart to
CSV.
Sample data edit
# Default type
ThisIsARecordOfTheDefaultType: true
%rec: Empty
# No records of this type.
%rec: Test
Name: John Smith
Email: [email protected]
Email: [email protected]
LongLine: This is a quite long value \
comprising a single unique logical line \
split in several physical lines.
Foo: bar1
+ bar2
+ bar3
The following code should be able to parse every recfile. However, it ignores record descriptors other than the record type (
%rec).
#!/usr/bin/env tclsh
namespace eval ::rec {
variable version 0.1.1
}
# Return format: a dictionary where each key is the record "type" and each value
# is a list of records. An empty string is used to indicate the default record
# type. Each record is in turn a dictionary where the key is the field name and
# the value is a list of one or values for the field.
proc ::rec::parse data {
set type {} ;# The record type.
set result {}
set currentRecord {}
set lastField {}
set lastValue {}
foreach line [split $data \n] {
# Skip comments.
if {[string match #* $line]} {
continue
}
if {$line eq {}} {
if {$currentRecord ne {}} {
dict lappend result $type $currentRecord
set currentRecord {}
}
} else {
if {[regexp {^([a-zA-Z%][a-zA-Z0-9_]*):[ \t]?(.*)$} $line _ \
field value]} {
# The line is field.
if {[string match %* $line]} {
switch -exact -- $field {
%rec {
set type $value
if {![dict exists $result $type]} {
dict set result $type {}
}
}
default {
# Ignore unrecognized record descriptors.
}
}
} else {
dict lappend currentRecord $field $value
set lastField $field
set lastValue $value
}
} else {
# The line is not a field. See if it is a continuation of the
# value for the field from the previous line.
if {[string match {*\\} $lastValue]} {
set lastValue [string range $lastValue 0 end-1]$line
dict set currentRecord $lastField $lastValue
} elseif {[regexp {^\+ ?(.*)$} $line _ afterNewline]} {
set lastValue $lastValue\n$afterNewline
dict set currentRecord $lastField $lastValue
} {
error "wrong line format: \"$line\""
}
}
}
}
return $result
}
proc ::rec::main {argv0 argv} {
set ch [open [lindex $argv 0]]
puts [::rec::parse [read $ch]]
close $ch
}
# If this is the main script...
if {[info exists argv0] && ([file tail [info script]] eq [file tail $argv0])} {
::rec::main $argv0 $argv
}
See also edit
