330 lines
13 KiB
Awk
330 lines
13 KiB
Awk
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#! /usr/common/bin/gawk -f
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#
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# Usage: ltru2xml.awk registry > registry.xml
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# Or : ltru2xml.awk /dev/null > registry.dtd
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#
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# The File-Date record is noted in a 'date' attribute of the root
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# element <LanguageSubtagRegistry>.
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#
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# Other records are converted to elements <language>, <extlang>,
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# <script>, <region>, <variant>, <grandfathered>, or <redundant>.
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#
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# The fields Added (required), Deprecated (optional), Description
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# (one or more), and Comment (optional) are converted to elements
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# <added>, <deprecated>, <description>, and <comment> in that order.
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#
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#### version 0.6 ##################################################
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#
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# Multiple descriptions and comments can be separated by an empty
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# <alt /> element, squeezing them all into a single <description>
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# or <comment> resp. The cleaner approach is to allow multiple
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# <description> or <comment> elements. Modify the line MULT = 0
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# below to MULT = 1 for this style.
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#
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# The tags zh-cmn, zh-hakka, and yi-latn are handled as special
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# cases for RFC 4646 registries, for 4646bis cmn is an ordinary
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# <extlang> subtag.
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#
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# Known issues: If the language subtag review list introduces a
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# language subtag with 5-8 characters which clashes with a variant
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# subtag these subtags would get the same xml:id resulting in an
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# XML syntax error. In practice it's unlikely that there ever
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# will be any IANA language subtag not derived from ISO 936, let
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# alone using the same string also for a variant subtag.
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#
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# "XML Notepad 2007", an experimental Microsoft tool, does not yet
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# support xml:id attributes without an explicit declaration of the
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# xml namespace. The W3C validator accepts xml:id without explicit
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# namespace declaration.
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#
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#### version 0.7 ##################################################
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#
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# The Internet drafts 4646bis-08 and 4645bis-02 introduced a new
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# optional field "Macrolanguage" for language and extlang subtags.
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#
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# Frank Ellermann, 2007
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#
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#### remove leading and trailing spaces ###########################
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function STRIP( STR )
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{ sub( /^[\t ]+/, "", STR )
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sub( /[\t ]+$/, "", STR )
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return STR
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}
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#### add underscore to subtags starting with a digit ##############
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function XMLID( STR )
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{ sub( /^[0-9]/, "_&", STR )
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return STR
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}
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#### convert tag to IDREFS (subtags) ##############################
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function IDREF( STR )
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{ N = split( STR, REF, "-" )
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STR = ""
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for ( I = 1; I <= N; ++I )
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STR = STR " " XMLID( REF[ I ] )
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return substr( STR, 2 )
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}
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#### escape less-than (and greater-than) characters ###############
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function CANON( STR )
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{ gsub( /</, "<", STR )
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gsub( />/, ">", STR )
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return STR
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}
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#### error ########################################################
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function FATAL( STR )
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{ print "error near line " NR ": " STR
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OKAY = 0 ; return 1
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}
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#### save unfolded field body #####################################
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function FIELD()
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{ if ( NAME == "description" ) D[ ++DD ] = BODY
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else if ( NAME == "comments" ) C[ ++CC ] = BODY
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else if ( NAME == "prefix" ) P[ ++PP ] = BODY
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else if ( F[ NAME ] == "" ) F[ NAME ] = BODY
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else exit FATAL( NAME ": " BODY )
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return
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}
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#### output record elements #######################################
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function READY()
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{ T = tolower( F[ "type" ] )
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if ( T == "" ) exit FATAL( "missing type" )
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L = "<" T
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S = F[ "subtag" ]
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if ( S == "" )
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{ S = F[ "tag" ]
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if ( S == "" ) exit FATAL( "missing tag" )
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if ( T != "redundant" ) print L ">"
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else if ( S == "yi-latn" )
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print L " subtags='yi Latn'>"
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else print L " subtags='" IDREF( S ) "'>"
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B = "\t<tag> " S " </tag>"
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HACK = HACK && ( S != "hak" )
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}
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else if ( F[ "tag" ] == "" )
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{ print L " xml:id='" XMLID( S ) "'>"
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B = "\t<subtag> " S " </subtag>"
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}
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else exit FATAL( "conflicting subtag " S )
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S = F[ "suppress-script" ]
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if ( S != "" && T == "language" )
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{ L = "\t<suppress script='" S "'> "
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print L S " </suppress>"
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}
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else if ( S != "" )
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exit FATAL( "unexpected Suppress-Script" S )
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if ( T == "extlang" && PP != 1 )
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exit FATAL( "missing or extraneous prefix" )
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while ( PP )
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{ L = "\t<prefix subtags='" IDREF( P[ PP ] ) "'> "
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print L P[ PP-- ] " </prefix>"
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}
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# modified:
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S = F[ "macrolanguage" ]
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if ( S != "" && ( T == "language" || T == "extlang" ))
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{ L = "\t<macro language='" S "'> "
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print L S " </macro>"
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}
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else if ( S != "" )
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exit FATAL( "unexpected Macrolanguage" S )
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A = F[ "added" ]
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if ( A == "" ) exit FATAL( "missing date" )
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print B "<added> " A " </added>"
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S = F[ "preferred-value" ]
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A = F[ "deprecated" ]
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if ( A != "" )
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{ L = "\t"
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if ( S != "" )
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{ L = L "<preferred"
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H = S == "zh-cmn" || S == "zh-hakka"
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if ( HACK && H )
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L = L " subtags='zh'> "
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else L = L " subtags='" IDREF( S ) "'> "
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L = L S " </preferred>"
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}
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print L "<deprecated> " A " </deprecated>"
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}
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else if ( S != "" )
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exit FATAL( "missing deprecated" )
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if ( DD )
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{ L = "\t<description> "
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while ( DD )
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{ L = L CANON( D[ DD-- ] )
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if ( DD )
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{ if ( MULT )
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{ print L " </description> "
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L = "\t<description>"
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}
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else
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{ print L
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L = "\t<alt /> "
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} } }
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print L " </description>"
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}
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else exit FATAL( "missing description" )
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if ( CC )
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{ L = "\t<comment> "
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while ( CC )
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{ L = L CANON( C[ CC-- ] )
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if ( CC )
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{ if ( MULT )
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{ print L " </comment> "
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L = "\t<comment>"
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}
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else
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{ print L
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L = "\t<alt /> "
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} } }
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print L " </comment>"
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}
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print "</" T ">"
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return
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}
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#### output DOCTYPE ###############################################
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BEGIN { ROOT = "LanguageSubtagRegistry"
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HACK = 1
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OKAY = 0
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VERS = "ltru2xml/0.7"
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MULT = 1
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if ( ! MULT ) VERS = VERS "alt"
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L = "<?xml version=\"1.0\" "
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L = L "encoding=\"UTF-8\" "
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print L "standalone=\"yes\" ?>"
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print "<!DOCTYPE " ROOT " ["
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A = "\tdate NMTOKEN #REQUIRED"
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S = "grandfathered*, redundant*"
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print "<!ELEMENT " ROOT " (language*, extlang*,"
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print "\tscript*, region*, variant*, " S ")>"
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print "<!ATTLIST " ROOT
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print A ">"
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A = "\txml:id ID #REQUIRED"
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S = "added, (preferred?, deprecated)?,"
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if ( MULT )
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S = S " description+, comment*"
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else S = S " description, comment?"
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# modified:
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L = "macro?, subtag,"
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print "<!ELEMENT language (suppress?, " L
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print "\t" S ")>"
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print "<!ATTLIST language"
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print A ">"
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print "<!ELEMENT extlang (prefix, " L
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print "\t" S ")>"
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print "<!ATTLIST extlang"
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print A ">"
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print "<!ELEMENT script (subtag,"
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print "\t" S ")>"
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print "<!ATTLIST script"
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print A ">"
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print "<!ELEMENT region (subtag,"
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print "\t" S ")>"
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print "<!ATTLIST region"
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print A ">"
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print "<!ELEMENT variant (prefix*, subtag,"
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print "\t" S ")>"
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print "<!ATTLIST variant"
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print A ">"
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A = "\tsubtags IDREFS #REQUIRED"
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print "<!ELEMENT grandfathered (tag,"
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print "\t" S ")>"
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print "<!ELEMENT redundant (tag,"
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print "\t" S ")>"
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print "<!ATTLIST redundant"
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print A ">"
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L = "<!-- a script subtag -->"
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S = "\tscript IDREF #REQUIRED"
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print "<!ELEMENT suppress (#PCDATA)>" L
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print "<!ATTLIST suppress"
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print S ">"
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# modified:
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L = "<!-- a macrolang subtag -->"
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S = "\tlanguage IDREF #REQUIRED"
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print "<!ELEMENT macro (#PCDATA)>" L
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print "<!ATTLIST macro"
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print S ">"
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L = "<!-- a prefix tag -->"
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print "<!ELEMENT prefix (#PCDATA)>" L
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print "<!ATTLIST prefix"
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print A ">"
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L = "<!-- a date -->"
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print "<!ELEMENT added (#PCDATA)>" L
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print "<!ELEMENT deprecated (#PCDATA)>" L
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L = "<!-- a (sub)tag -->"
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print "<!ELEMENT preferred (#PCDATA)>" L
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print "<!ATTLIST preferred"
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print A ">"
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print "<!ELEMENT subtag (#PCDATA)>" L
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print "<!ELEMENT tag (#PCDATA)>" L
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if ( MULT )
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L = "(#PCDATA)><!-- text -->"
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else L = "(#PCDATA | alt)*>"
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print "<!ELEMENT description " L
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print "<!ELEMENT comment " L
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if ( ! MULT )
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{ L = "<!-- separator -->"
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print "<!ELEMENT alt EMPTY> " L
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}
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print "]>"
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print
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}
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#### record separator #############################################
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/^\%\%$/ { FIELD()
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if ( NN++ ) READY()
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else
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{ A = F[ "file-date" ]
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if ( A == "" )
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exit FATAL( "missing File-Date" )
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print "<" ROOT " date='" A "'>"
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OKAY = 1
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}
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for ( NAME in F ) delete F[ NAME ]
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NAME = "" ; CC = 0 ; PP = 0
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BODY = "" ; DD = 0 ; next
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}
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#### start of new field ###########################################
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/^[A-Za-z0-9]/ { FIELD()
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if ( ! match( $0, ":" )) exit FATAL( $0 )
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NAME = tolower( substr( $0, 1, RSTART - 1 ))
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BODY = STRIP( substr( $0, RSTART + 1 ))
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next
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}
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#### unfold field body ############################################
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/^[\t ]/ { BODY = BODY " " STRIP( $0 )
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next
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}
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#### garbage ######################################################
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{ exit FATAL( $0 )
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}
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###################################################################
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END { if ( NN++ )
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{ FIELD() ; READY()
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print "</" ROOT ">"
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}
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else OKAY = 0
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print "<!-- " VERS " (" --NN " records) -->"
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exit 1 - OKAY
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}
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