vlna

       vlna [options] [filenames]

PREFACE
       There  exists a special Czech and Slovak typographical rule: you cannot
       leave the non-syllabic preposition on the end of one line and  continue
       writting text on next line. For example, you cannot write down the text
       "v lese" (in a forest) like "v<new-line>lese". The  program  vlna  adds
       the  asciitilde  between such preposition and the next word and removes
       the space(s) in this place.  It means, the program converts "v lese" to
       "v~lese".  You  can  use  this program as a preporcessor before TeXing.
       Moreower, you can set another sequence to store instead asciitilte (see
       the -x option).

DESCRIPTION
       The program vlna processes one or more files, searches the non-syllabic
       prepositions  followed  by  space(s)  in  these  files   and   converts
       this/these space(s) to asciitilde for each such occurrence.

       In  the  processed  file, the activity of the program can be blocked by
       %~- sequence and  the  activity  can  be  restored  again  by  the  %~+
       sequence.  These  sequences can include spaces, it means that % ~- is a
       correct sequence too.

       The rule to recognize a preposition follows: The  arbitrary  number  of
       opening  parentheses  can  be written before the preposition and before
       these (optional) parentheses must be the space, tabelator or  new-line.
       The  preposition itself is one-letter word, the letters have to be from
       this set: {KkSsVvZzOoUuAI}. See the -v option if  you  want  to  change
       this  set of letters. From version 1.2, the TeX sequence can be written
       before preposition and before the brace. Example: "<new-line>([V  lese"
       is  converted  to "<new-line>([V~lese".  Another example: "\uv{V lese}"
       is converted to "\uv{V~lese}".

       One or more blank-spaces have to be included after  preposition  before
       next  word.  The  blank-space means space or tabelator.  One <new-line>
       can be here too.  All these characters  are  removed  and  replaced  by
       asciitilde  (or  by  another  string,  see -x option). If <new-line> is
       deleted, another <new-line> is created before preposition  (and  before
       optional  parentheses)  in  order  to  the  number  of  lines  is  kept
       unchanged.  Example: "... V<new-line><tabelator>lese" is  converted  to
       "...<new-line>V~lese".

       The  program  checks  the consintence of TeX's math environments (if -m
       option isn't used). For example the "$...$$...$" sequence (it means the
       display  mode  switch  inside  the text-math mode) generates a warning.
       Empty line inside display mode generates a warning too and the  program
       processes  next  text  like in normal (non-math) mode. The existence of
       the "$" inside display mode are accepted because the constructions like
       $$..\hbox{..$..$}..$$ are allowed and common.

       The consistence of verbatim mode is checked on the end of the file.  If
       the file ends but the  verbatim  mode  does  not  end  the  warning  is
       printed.  This behavior can be switched off by -n or -w options.


              vlna -f filename1 filename2
                  Input is filename1, output is filename2.

              vlna -f filename1
                  Input is filename1, output is stdout.

              vlna -f
                  Input is stdin, output is stdout.

              vlna filename1 [filename2 [filename3 ...]]
                  If  the  -f  option  is  omitted then each file is processed
                  independently and it is re-written.

       -s     The silent mode. No messages, warnings, statistics are  printed.
              Only  errors  which terminates the program untimely are printed.
              If  this  parameter  is  omitted  then  banner,   warnings   and
              statistics are printed to stderr.

       -r     Do not create the backups. The option -r is irrelevant if the -f
              option is used. If the -f and -r options aren't used  then  each
              re-written file is stored with its original contents to a backup
              file (the name of backup file is the same as filename, only  the
              tilde is used instead of the last character).

       -v characters
              The  set  of  characters treated as non-syllabic prepositions is
              declared by this option. Default: -v KkSsVvZzOoUuAI.  The  space
              between -v and characters is required.

       -x code
              The  code is a string written in hexadecimal notation (even hexa
              digits  is  required).  This  string   will   be   saved   after
              prepositions  instead asciitilde which is default.  The example:
              -x  C2A0  two  bytes  are   stored   after   each   non-syllabic
              preposition, first byte has C2 code and second byte has A0 code.
              This example means that NO-BREAK SPACE in UTF8 encoding will  be
              used  after prepositions.  Another example: -x 00A0 the NO-BREAK
              SPACE in UTF16 encoding.  Another  example:  -x  48454C4C4F  the
              string  HELLO  will  be  used.  The space between -x and code is
              required.

       -m     The math-modes ($...$ and $$...$$) are ignored.  It  means  that
              non-syllabic prepositions is searched in math-mode too.  Default
              (without -m option): no changes in math modes are  done  because
              (for example) "v" is variable in math-mode, no preposition.

       -n     The  verbatim  mode  (\verb<char>...<char>,  \begtt...\endtt) is
              ignored, it means the program  can  do  a  changes  in  verbatim
              environment.    Default  (without  -n  option):  no  changes  in
              verbatim mode are done.

       -l     The LaTeX  mode.  The  following  environments  are  treated  as
              display      mode:      \begin{display}...\end{display}      and

       vlna *.tex
              All  files  with  .tex  suffix  in  current  directory  will  be
              processed   (and  possibly  changed).  (The  "*"  is  UNIX-shell
              feautre).

       vlna -f file > /dev/null
              Only the consistence checking of  math  and  verbatim  modes  is
              processed.  No changes are done.

AUTHORS
       Petr  Olsak  <olsak@math.feld.cvut.cz>.   Man page (Czech original) and
       Makefile is created by Rulolf Cejka

                                 March 30 2009                         VLNA(1)
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