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