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(*
Module: Channels
Parses channels.conf files
Author: Raphael Pinson <raphink@gmail.com>
About: Reference
See http://linuxtv.org/vdrwiki/index.php/Syntax_of_channels.conf
About: License
This file is licenced under the LGPL v2+, like the rest of Augeas.
About: Lens Usage
To be documented
About: Configuration files
This lens applies to channels.conf files.
About: Examples
The <Test_Channels> file contains various examples and tests.
*)
module Channels =
(************************************************************************
* Group: USEFUL PRIMITIVES
*************************************************************************)
(* View: eol *)
let eol = Util.eol
(* View: comment *)
let comment = Util.comment_generic /;[ \t]*/ "; "
(* View: equal *)
let equal = Sep.equal
(* View: colon *)
let colon = Sep.colon
(* View: comma *)
let comma = Sep.comma
(* View: semicol *)
let semicol = Util.del_str ";"
(* View: plus *)
let plus = Util.del_str "+"
(* View: arroba *)
let arroba = Util.del_str "@"
(* View: no_colon *)
let no_colon = /[^: \t\n][^:\n]*[^: \t\n]|[^:\n]/
(* View: no_semicolon *)
let no_semicolon = /[^;\n]+/
(************************************************************************
* Group: FUNCTIONS
*************************************************************************)
(* View: field
A generic field *)
let field (name:string) (sto:regexp) = [ label name . store sto ]
(* View: field_no_colon
A <field> storing <no_colon> *)
let field_no_colon (name:string) = field name no_colon
(* View: field_int
A <field> storing <Rx.integer> *)
let field_int (name:string) = field name Rx.integer
(* View: field_word
A <field> storing <Rx.word> *)
let field_word (name:string) = field name Rx.word
(************************************************************************
* Group: ENTRIES
*************************************************************************)
(* View: vpid *)
let vpid =
let codec =
[ equal . label "codec" . store Rx.integer ]
in let vpid_entry (lbl:string) =
[ label lbl . store Rx.integer . codec? ]
in vpid_entry "vpid"
. ( plus . vpid_entry "vpid_pcr" )?
(* View: langs *)
let langs =
let lang =
[ label "lang" . store Rx.word ]
in Build.opt_list lang plus
(* View: apid *)
let apid =
let codec =
[ arroba . label "codec" . store Rx.integer ]
in let options =
equal . ( (langs . codec?) | codec )
in let apid_entry (lbl:string) =
[ label lbl . store Rx.integer . options? ]
in Build.opt_list (apid_entry "apid") comma
. ( semicol
. Build.opt_list (apid_entry "apid_dolby") comma )?
(* View: tpid *)
let tpid =
let tpid_bylang =
[ label "tpid_bylang" . store Rx.integer
. (equal . langs)? ]
in field_int "tpid"
. ( semicol . Build.opt_list tpid_bylang comma )?
(* View: caid *)
let caid =
let caid_entry =
[ label "caid" . store Rx.word ]
in Build.opt_list caid_entry comma
(* View: entry *)
let entry = [ label "entry" . store no_semicolon
. (semicol . field_no_colon "provider")? . colon
. field_int "frequency" . colon
. field_word "parameter" . colon
. field_word "signal_source" . colon
. field_int "symbol_rate" . colon
. vpid . colon
. apid . colon
. tpid . colon
. caid . colon
. field_int "sid" . colon
. field_int "nid" . colon
. field_int "tid" . colon
. field_int "rid" . eol ]
(* View: entry_or_comment *)
let entry_or_comment = entry | comment
(* View: group *)
let group =
[ Util.del_str ":" . label "group"
. store no_colon . eol
. entry_or_comment* ]
(* View: lns *)
let lns = entry_or_comment* . group*