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version 1.20, 2013/09/16 22:54:38 version 1.37, 2016/07/07 19:19:01
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 .\"     $Id$  .\"     $Id$
 .\"  .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>  .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>  .\" Copyright (c) 2010-2016 Ingo Schwarze <schwarze@openbsd.org>
 .\"  .\"
 .\" Permission to use, copy, modify, and distribute this software for any  .\" Permission to use, copy, modify, and distribute this software for any
 .\" purpose with or without fee is hereby granted, provided that the above  .\" purpose with or without fee is hereby granted, provided that the above
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 .Os  .Os
 .Sh NAME  .Sh NAME
 .Nm mandoc ,  .Nm mandoc ,
 .Nm mandoc_escape ,  .Nm deroff ,
 .Nm man_meta ,  .Nm mandocmsg ,
 .Nm man_mparse ,  .Nm man_mparse ,
 .Nm man_node ,  .Nm man_validate ,
 .Nm mchars_alloc ,  .Nm mdoc_validate ,
 .Nm mchars_free ,  
 .Nm mchars_num2char ,  
 .Nm mchars_num2uc ,  
 .Nm mchars_spec2cp ,  
 .Nm mchars_spec2str ,  
 .Nm mdoc_meta ,  
 .Nm mdoc_node ,  
 .Nm mparse_alloc ,  .Nm mparse_alloc ,
 .Nm mparse_free ,  .Nm mparse_free ,
 .Nm mparse_getkeep ,  .Nm mparse_getkeep ,
 .Nm mparse_keep ,  .Nm mparse_keep ,
   .Nm mparse_open ,
 .Nm mparse_readfd ,  .Nm mparse_readfd ,
 .Nm mparse_reset ,  .Nm mparse_reset ,
 .Nm mparse_result ,  .Nm mparse_result ,
 .Nm mparse_strerror ,  .Nm mparse_strerror ,
 .Nm mparse_strlevel  .Nm mparse_strlevel
 .Nd mandoc macro compiler library  .Nd mandoc macro compiler library
 .Sh LIBRARY  
 .Lb mandoc  
 .Sh SYNOPSIS  .Sh SYNOPSIS
 .In man.h  .In sys/types.h
 .In mdoc.h  
 .In mandoc.h  .In mandoc.h
 .Ft "enum mandoc_esc"  .Pp
 .Fo mandoc_escape  .Fd "#define ASCII_NBRSP"
 .Fa "const char **end"  .Fd "#define ASCII_HYPH"
 .Fa "const char **start"  .Fd "#define ASCII_BREAK"
 .Fa "int *sz"  .Ft struct mparse *
 .Fc  
 .Ft "const struct man_meta *"  
 .Fo man_meta  
 .Fa "const struct man *man"  
 .Fc  
 .Ft "const struct mparse *"  
 .Fo man_mparse  
 .Fa "const struct man *man"  
 .Fc  
 .Ft "const struct man_node *"  
 .Fo man_node  
 .Fa "const struct man *man"  
 .Fc  
 .Ft "struct mchars *"  
 .Fn mchars_alloc "void"  
 .Ft void  
 .Fn mchars_free "struct mchars *p"  
 .Ft char  
 .Fn mchars_num2char "const char *cp" "size_t sz"  
 .Ft int  
 .Fn mchars_num2uc "const char *cp" "size_t sz"  
 .Ft "const char *"  
 .Fo mchars_spec2str  
 .Fa "const struct mchars *p"  
 .Fa "const char *cp"  
 .Fa "size_t sz"  
 .Fa "size_t *rsz"  
 .Fc  
 .Ft int  
 .Fo mchars_spec2cp  
 .Fa "const struct mchars *p"  
 .Fa "const char *cp"  
 .Fa "size_t sz"  
 .Fc  
 .Ft "const struct mdoc_meta *"  
 .Fo mdoc_meta  
 .Fa "const struct mdoc *mdoc"  
 .Fc  
 .Ft "const struct mdoc_node *"  
 .Fo mdoc_node  
 .Fa "const struct mdoc *mdoc"  
 .Fc  
 .Ft void  
 .Fo mparse_alloc  .Fo mparse_alloc
 .Fa "enum mparset type"  .Fa "int options"
 .Fa "enum mandoclevel wlevel"  .Fa "enum mandoclevel wlevel"
 .Fa "mandocmsg msg"  .Fa "mandocmsg mmsg"
 .Fa "void *msgarg"  .Fa "char *defos"
 .Fc  .Fc
 .Ft void  .Ft void
   .Fo (*mandocmsg)
   .Fa "enum mandocerr errtype"
   .Fa "enum mandoclevel level"
   .Fa "const char *file"
   .Fa "int line"
   .Fa "int col"
   .Fa "const char *msg"
   .Fc
   .Ft void
 .Fo mparse_free  .Fo mparse_free
 .Fa "struct mparse *parse"  .Fa "struct mparse *parse"
 .Fc  .Fc
 .Ft void  .Ft const char *
 .Fo mparse_getkeep  .Fo mparse_getkeep
 .Fa "const struct mparse *parse"  .Fa "const struct mparse *parse"
 .Fc  .Fc
Line 114 
Line 71 
 .Fo mparse_keep  .Fo mparse_keep
 .Fa "struct mparse *parse"  .Fa "struct mparse *parse"
 .Fc  .Fc
   .Ft int
   .Fo mparse_open
   .Fa "struct mparse *parse"
   .Fa "const char *fname"
   .Fc
 .Ft "enum mandoclevel"  .Ft "enum mandoclevel"
 .Fo mparse_readfd  .Fo mparse_readfd
 .Fa "struct mparse *parse"  .Fa "struct mparse *parse"
Line 127 
Line 89 
 .Ft void  .Ft void
 .Fo mparse_result  .Fo mparse_result
 .Fa "struct mparse *parse"  .Fa "struct mparse *parse"
 .Fa "struct mdoc **mdoc"  .Fa "struct roff_man **man"
 .Fa "struct man **man"  .Fa "char **sodest"
 .Fc  .Fc
 .Ft "const char *"  .Ft "const char *"
 .Fo mparse_strerror  .Fo mparse_strerror
Line 138 
Line 100 
 .Fo mparse_strlevel  .Fo mparse_strlevel
 .Fa "enum mandoclevel"  .Fa "enum mandoclevel"
 .Fc  .Fc
 .Vt extern const char * const * man_macronames;  .In roff.h
   .Ft void
   .Fo deroff
   .Fa "char **dest"
   .Fa "const struct roff_node *node"
   .Fc
   .In sys/types.h
   .In mandoc.h
   .In mdoc.h
 .Vt extern const char * const * mdoc_argnames;  .Vt extern const char * const * mdoc_argnames;
 .Vt extern const char * const * mdoc_macronames;  .Vt extern const char * const * mdoc_macronames;
 .Fd "#define ASCII_NBRSP"  .Ft void
 .Fd "#define ASCII_HYPH"  .Fo mdoc_validate
   .Fa "struct roff_man *mdoc"
   .Fc
   .In sys/types.h
   .In mandoc.h
   .In man.h
   .Vt extern const char * const * man_macronames;
   .Ft "const struct mparse *"
   .Fo man_mparse
   .Fa "const struct roff_man *man"
   .Fc
   .Ft void
   .Fo man_validate
   .Fa "struct roff_man *man"
   .Fc
 .Sh DESCRIPTION  .Sh DESCRIPTION
 The  The
 .Nm mandoc  .Nm mandoc
Line 165  The following describes a general parse sequence:
Line 149  The following describes a general parse sequence:
 .Bl -enum  .Bl -enum
 .It  .It
 initiate a parsing sequence with  initiate a parsing sequence with
   .Xr mchars_alloc 3
   and
 .Fn mparse_alloc ;  .Fn mparse_alloc ;
 .It  .It
 parse files or file descriptors with  open a file with
   .Xr open 2
   or
   .Fn mparse_open ;
   .It
   parse it with
 .Fn mparse_readfd ;  .Fn mparse_readfd ;
 .It  .It
 retrieve a parsed syntax tree, if the parse was successful, with  close it with
   .Xr close 2 ;
   .It
   retrieve the syntax tree with
 .Fn mparse_result ;  .Fn mparse_result ;
 .It  .It
 iterate over parse nodes with  depending on whether the
 .Fn mdoc_node  .Fa macroset
   member of the returned
   .Vt struct roff_man
   is
   .Dv MACROSET_MDOC
 or  or
 .Fn man_node ;  .Dv MACROSET_MAN ,
   validate it with
   .Fn mdoc_validate
   or
   .Fn man_validate ,
   respectively;
 .It  .It
   iterate over parse nodes with starting from the
   .Fa first
   member of the returned
   .Vt struct roff_man ;
   .It
 free all allocated memory with  free all allocated memory with
 .Fn mparse_free ,  .Fn mparse_free
   and
   .Xr mchars_free 3 ,
 or invoke  or invoke
 .Fn mparse_reset  .Fn mparse_reset
 and parse new files.  and go back to step 2 to parse new files.
 .El  .El
 .Pp  
 The  
 .Nm  
 library also contains routines for translating character strings into glyphs  
 .Pq see Fn mchars_alloc  
 and parsing escape sequences from strings  
 .Pq see Fn mandoc_escape .  
 .Sh REFERENCE  .Sh REFERENCE
 This section documents the functions, types, and variables available  This section documents the functions, types, and variables available
 via  via
 .In mandoc.h .  .In mandoc.h ,
   with the exception of those documented in
   .Xr mandoc_escape 3
   and
   .Xr mchars_alloc 3 .
 .Ss Types  .Ss Types
 .Bl -ohang  .Bl -ohang
 .It Vt "enum mandoc_esc"  
 An escape sequence classification.  
 .It Vt "enum mandocerr"  .It Vt "enum mandocerr"
 A fatal error, error, or warning message during parsing.  An error or warning message during parsing.
 .It Vt "enum mandoclevel"  .It Vt "enum mandoclevel"
 A classification of an  A classification of an
 .Vt "enum mandoclevel"  .Vt "enum mandocerr"
 as regards system operation.  as regards system operation.
 .It Vt "struct mchars"  See the DIAGNOSTICS section in
 An opaque pointer to an object allowing for translation between  .Xr mandoc 1
 character strings and glyphs.  regarding the meanings of the levels.
 See  
 .Fn mchars_alloc .  
 .It Vt "enum mparset"  
 The type of parser when reading input.  
 This should usually be  
 .Dv MPARSE_AUTO  
 for auto-detection.  
 .It Vt "struct mparse"  .It Vt "struct mparse"
 An opaque pointer to a running parse sequence.  An opaque pointer to a running parse sequence.
 Created with  Created with
Line 225  This may be used across parsed input if
Line 223  This may be used across parsed input if
 .Fn mparse_reset  .Fn mparse_reset
 is called between parses.  is called between parses.
 .It Vt "mandocmsg"  .It Vt "mandocmsg"
 A prototype for a function to handle fatal error, error, and warning  A prototype for a function to handle error and warning
 messages emitted by the parser.  messages emitted by the parser.
 .El  .El
 .Ss Functions  .Ss Functions
 .Bl -ohang  .Bl -ohang
 .It Fn mandoc_escape  .It Fn deroff
 Scan an escape sequence, i.e., a character string beginning with  Obtain a text-only representation of a
 .Sq \e .  .Vt struct roff_node ,
 Pass a pointer to the character after the  including text contained in its child nodes.
 .Sq \e  To be used on children of the
 as  .Fa first
 .Va end ;  member of
 it will be set to the supremum of the parsed escape sequence unless  .Vt struct roff_man .
 returning  When it is no longer needed, the pointer returned from
 .Dv ESCAPE_ERROR ,  .Fn deroff
 in which case the string is bogus and should be  can be passed to
 thrown away.  .Xr free 3 .
 If not  
 .Dv ESCAPE_ERROR  
 or  
 .Dv ESCAPE_IGNORE ,  
 .Va start  
 is set to the first relevant character of the substring (font, glyph,  
 whatever) of length  
 .Va sz .  
 Both  
 .Va start  
 and  
 .Va sz  
 may be  
 .Dv NULL .  
 Declared in  
 .In mandoc.h ,  
 implemented in  
 .Pa mandoc.c .  
 .It Fn man_meta  
 Obtain the meta-data of a successful parse.  
 This may only be used on a pointer returned by  
 .Fn mparse_result .  
 Declared in  
 .In man.h ,  
 implemented in  
 .Pa man.c .  
 .It Fn man_mparse  .It Fn man_mparse
 Get the parser used for the current output.  Get the parser used for the current output.
 Declared in  Declared in
 .In man.h ,  .In man.h ,
 implemented in  implemented in
 .Pa man.c .  .Pa man.c .
 .It Fn man_node  .It Fn man_validate
 Obtain the root node of a successful parse.  Validate the
 This may only be used on a pointer returned by  .Dv MACROSET_MAN
   parse tree obtained with
 .Fn mparse_result .  .Fn mparse_result .
 Declared in  Declared in
 .In man.h ,  .In man.h ,
 implemented in  implemented in
 .Pa man.c .  .Pa man.c .
 .It Fn mchars_alloc  .It Fn mdoc_validate
 Allocate an  Validate the
 .Vt "struct mchars *"  .Dv MACROSET_MDOC
 object for translating special characters into glyphs.  parse tree obtained with
 See  
 .Xr mandoc_char 7  
 for an overview of special characters.  
 The object must be freed with  
 .Fn mchars_free .  
 Declared in  
 .In mandoc.h ,  
 implemented in  
 .Pa chars.c .  
 .It Fn mchars_free  
 Free an object created with  
 .Fn mchars_alloc .  
 Declared in  
 .In mandoc.h ,  
 implemented in  
 .Pa chars.c .  
 .It Fn mchars_num2char  
 Convert a character index (e.g., the \eN\(aq\(aq escape) into a  
 printable ASCII character.  
 Returns \e0 (the nil character) if the input sequence is malformed.  
 Declared in  
 .In mandoc.h ,  
 implemented in  
 .Pa chars.c .  
 .It Fn mchars_num2uc  
 Convert a hexadecimal character index (e.g., the \e[uNNNN] escape) into  
 a Unicode codepoint.  
 Returns \e0 (the nil character) if the input sequence is malformed.  
 Declared in  
 .In mandoc.h ,  
 implemented in  
 .Pa chars.c .  
 .It Fn mchars_spec2cp  
 Convert a special character into a valid Unicode codepoint.  
 Returns \-1 on failure or a non-zero Unicode codepoint on success.  
 Declared in  
 .In mandoc.h ,  
 implemented in  
 .Pa chars.c .  
 .It Fn mchars_spec2str  
 Convert a special character into an ASCII string.  
 Returns  
 .Dv NULL  
 on failure.  
 Declared in  
 .In mandoc.h ,  
 implemented in  
 .Pa chars.c .  
 .It Fn mdoc_meta  
 Obtain the meta-data of a successful parse.  
 This may only be used on a pointer returned by  
 .Fn mparse_result .  .Fn mparse_result .
 Declared in  Declared in
 .In mdoc.h ,  .In mdoc.h ,
 implemented in  implemented in
 .Pa mdoc.c .  .Pa mdoc.c .
 .It Fn mdoc_node  
 Obtain the root node of a successful parse.  
 This may only be used on a pointer returned by  
 .Fn mparse_result .  
 Declared in  
 .In mdoc.h ,  
 implemented in  
 .Pa mdoc.c .  
 .It Fn mparse_alloc  .It Fn mparse_alloc
 Allocate a parser.  Allocate a parser.
   The arguments have the following effect:
   .Bl -tag -offset 5n -width inttype
   .It Ar options
   When the
   .Dv MPARSE_MDOC
   or
   .Dv MPARSE_MAN
   bit is set, only that parser is used.
   Otherwise, the document type is automatically detected.
   .Pp
   When the
   .Dv MPARSE_SO
   bit is set,
   .Xr roff 7
   .Ic \&so
   file inclusion requests are always honoured.
   Otherwise, if the request is the only content in an input file,
   only the file name is remembered, to be returned in the
   .Fa sodest
   argument of
   .Fn mparse_result .
   .Pp
   When the
   .Dv MPARSE_QUICK
   bit is set, parsing is aborted after the NAME section.
   This is for example useful in
   .Xr makewhatis 8
   .Fl Q
   to quickly build minimal databases.
   .It Ar wlevel
   Can be set to
   .Dv MANDOCLEVEL_BADARG ,
   .Dv MANDOCLEVEL_ERROR ,
   or
   .Dv MANDOCLEVEL_WARNING .
   Messages below the selected level will be suppressed.
   .It Ar mmsg
   A callback function to handle errors and warnings.
   See
   .Pa main.c
   for an example.
   If printing of error messages is not desired,
   .Dv NULL
   may be passed.
   .It Ar defos
   A default string for the
   .Xr mdoc 7
   .Sq \&Os
   macro, overriding the
   .Dv OSNAME
   preprocessor definition and the results of
   .Xr uname 3 .
   Passing
   .Dv NULL
   sets no default.
   .El
   .Pp
 The same parser may be used for multiple files so long as  The same parser may be used for multiple files so long as
 .Fn mparse_reset  .Fn mparse_reset
 is called between parses.  is called between parses.
Line 385  Declared in
Line 356  Declared in
 .In mandoc.h ,  .In mandoc.h ,
 implemented in  implemented in
 .Pa read.c .  .Pa read.c .
   .It Fn mparse_open
   Open the file for reading.
   If that fails and
   .Fa fname
   does not already end in
   .Ql .gz ,
   try again after appending
   .Ql .gz .
   Save the information whether the file is zipped or not.
   Return a file descriptor open for reading or -1 on failure.
   It can be passed to
   .Fn mparse_readfd
   or used directly.
   Declared in
   .In mandoc.h ,
   implemented in
   .Pa read.c .
 .It Fn mparse_readfd  .It Fn mparse_readfd
 Parse a file or file descriptor.  Parse a file descriptor opened with
 If  .Xr open 2
 .Va fd  or
 is -1,  .Fn mparse_open .
 .Va fname  Pass the associated filename in
 is opened for reading.  .Va fname .
 Otherwise,  This function may be called multiple times with different parameters; however,
 .Va fname  .Xr close 2
 is assumed to be the name associated with  and
 .Va fd .  
 This may be called multiple times with different parameters; however,  
 .Fn mparse_reset  .Fn mparse_reset
 should be invoked between parses.  should be invoked between parses.
 Declared in  Declared in
Line 413  implemented in
Line 399  implemented in
 .Pa read.c .  .Pa read.c .
 .It Fn mparse_result  .It Fn mparse_result
 Obtain the result of a parse.  Obtain the result of a parse.
 Only successful parses  One of the two pointers will be filled in.
 .Po  
 i.e., those where  
 .Fn mparse_readfd  
 returned less than MANDOCLEVEL_FATAL  
 .Pc  
 should invoke this function, in which case one of the two pointers will  
 be filled in.  
 Declared in  Declared in
 .In mandoc.h ,  .In mandoc.h ,
 implemented in  implemented in
Line 441  implemented in
Line 420  implemented in
 .Ss Variables  .Ss Variables
 .Bl -ohang  .Bl -ohang
 .It Va man_macronames  .It Va man_macronames
 The string representation of a man macro as indexed by  The string representation of a
   .Xr man 7
   macro as indexed by
 .Vt "enum mant" .  .Vt "enum mant" .
 .It Va mdoc_argnames  .It Va mdoc_argnames
 The string representation of a mdoc macro argument as indexed by  The string representation of an
   .Xr mdoc 7
   macro argument as indexed by
 .Vt "enum mdocargt" .  .Vt "enum mdocargt" .
 .It Va mdoc_macronames  .It Va mdoc_macronames
 The string representation of a mdoc macro as indexed by  The string representation of an
   .Xr mdoc 7
   macro as indexed by
 .Vt "enum mdoct" .  .Vt "enum mdoct" .
 .El  .El
 .Sh IMPLEMENTATION NOTES  .Sh IMPLEMENTATION NOTES
Line 473  The following non-printing characters may be embedded 
Line 458  The following non-printing characters may be embedded 
 A non-breaking space character.  A non-breaking space character.
 .It Dv ASCII_HYPH  .It Dv ASCII_HYPH
 A soft hyphen.  A soft hyphen.
   .It Dv ASCII_BREAK
   A breakable zero-width space.
 .El  .El
 .Pp  .Pp
 Escape characters are also passed verbatim into text strings.  Escape characters are also passed verbatim into text strings.
Line 480  An escape character is a sequence of characters beginn
Line 467  An escape character is a sequence of characters beginn
 backslash  backslash
 .Pq Sq \e .  .Pq Sq \e .
 To construct human-readable text, these should be intercepted with  To construct human-readable text, these should be intercepted with
 .Fn mandoc_escape  .Xr mandoc_escape 3
 and converted with one of  and converted with one the functions described in
 .Fn mchars_num2char ,  .Xr mchars_alloc 3 .
 .Fn mchars_spec2str ,  
 and so on.  
 .Ss Man Abstract Syntax Tree  .Ss Man Abstract Syntax Tree
 This AST is governed by the ontological rules dictated in  This AST is governed by the ontological rules dictated in
 .Xr man 7  .Xr man 7
 and derives its terminology accordingly.  and derives its terminology accordingly.
 .Pp  .Pp
 The AST is composed of  The AST is composed of
 .Vt struct man_node  .Vt struct roff_node
 nodes with element, root and text types as declared by the  nodes with element, root and text types as declared by the
 .Va type  .Va type
 field.  field.
 Each node also provides its parse point (the  Each node also provides its parse point (the
 .Va line ,  .Va line ,
 .Va sec ,  .Va pos ,
 and  and
 .Va pos  .Va sec
 fields), its position in the tree (the  fields), its position in the tree (the
 .Va parent ,  .Va parent ,
 .Va child ,  .Va child ,
Line 529  where capitalised non-terminals represent nodes.
Line 514  where capitalised non-terminals represent nodes.
 .El  .El
 .Pp  .Pp
 The only elements capable of nesting other elements are those with  The only elements capable of nesting other elements are those with
 next-lint scope as documented in  next-line scope as documented in
 .Xr man 7 .  .Xr man 7 .
 .Ss Mdoc Abstract Syntax Tree  .Ss Mdoc Abstract Syntax Tree
 This AST is governed by the ontological  This AST is governed by the ontological
Line 543  are described simply as
Line 528  are described simply as
 .Qq elements .  .Qq elements .
 .Pp  .Pp
 The AST is composed of  The AST is composed of
 .Vt struct mdoc_node  .Vt struct roff_node
 nodes with block, head, body, element, root and text types as declared  nodes with block, head, body, element, root and text types as declared
 by the  by the
 .Va type  .Va type
 field.  field.
 Each node also provides its parse point (the  Each node also provides its parse point (the
 .Va line ,  .Va line ,
 .Va sec ,  .Va pos ,
 and  and
 .Va pos  .Va sec
 fields), its position in the tree (the  fields), its position in the tree (the
 .Va parent ,  .Va parent ,
 .Va child ,  .Va child ,
 .Va nchild ,  .Va last ,
 .Va next  .Va next
 and  and
 .Va prev  .Va prev
Line 665  front-ends to
Line 650  front-ends to
 .Xr mandoc 1  .Xr mandoc 1
 are unable to render them in any meaningful way.  are unable to render them in any meaningful way.
 Furthermore, behaviour when encountering badly-nested blocks is not  Furthermore, behaviour when encountering badly-nested blocks is not
 consistent across troff implementations, especially when using  multiple  consistent across troff implementations, especially when using multiple
 levels of badly-nested blocks.  levels of badly-nested blocks.
 .Sh SEE ALSO  .Sh SEE ALSO
 .Xr mandoc 1 ,  .Xr mandoc 1 ,
   .Xr man.cgi 3 ,
   .Xr mandoc_escape 3 ,
   .Xr mandoc_headers 3 ,
   .Xr mandoc_malloc 3 ,
   .Xr mansearch 3 ,
   .Xr mchars_alloc 3 ,
   .Xr tbl 3 ,
 .Xr eqn 7 ,  .Xr eqn 7 ,
 .Xr man 7 ,  .Xr man 7 ,
 .Xr mandoc_char 7 ,  .Xr mandoc_char 7 ,
Line 676  levels of badly-nested blocks.
Line 668  levels of badly-nested blocks.
 .Xr roff 7 ,  .Xr roff 7 ,
 .Xr tbl 7  .Xr tbl 7
 .Sh AUTHORS  .Sh AUTHORS
   .An -nosplit
 The  The
 .Nm  .Nm
 library was written by  library was written by
 .An Kristaps Dzonsons Aq Mt kristaps@bsd.lv .  .An Kristaps Dzonsons Aq Mt kristaps@bsd.lv
   and is maintained by
   .An Ingo Schwarze Aq Mt schwarze@openbsd.org .

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  Added in v.1.37

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