-.\" $Id: mandoc.3,v 1.21 2013/10/05 20:30:05 schwarze Exp $
+.\" $Id: mandoc.3,v 1.44 2018/12/30 00:49:55 schwarze Exp $
.\"
.\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
-.\" Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
+.\" Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
-.Dd $Mdocdate: October 5 2013 $
+.Dd $Mdocdate: December 30 2018 $
.Dt MANDOC 3
.Os
.Sh NAME
.Nm mandoc ,
-.Nm mandoc_escape ,
-.Nm man_meta ,
-.Nm man_mparse ,
-.Nm man_node ,
-.Nm mchars_alloc ,
-.Nm mchars_free ,
-.Nm mchars_num2char ,
-.Nm mchars_num2uc ,
-.Nm mchars_spec2cp ,
-.Nm mchars_spec2str ,
-.Nm mdoc_meta ,
-.Nm mdoc_node ,
+.Nm deroff ,
.Nm mparse_alloc ,
+.Nm mparse_copy ,
.Nm mparse_free ,
-.Nm mparse_getkeep ,
-.Nm mparse_keep ,
+.Nm mparse_open ,
.Nm mparse_readfd ,
.Nm mparse_reset ,
-.Nm mparse_result ,
-.Nm mparse_strerror ,
-.Nm mparse_strlevel
+.Nm mparse_result
.Nd mandoc macro compiler library
-.Sh LIBRARY
-.Lb mandoc
.Sh SYNOPSIS
-.In man.h
-.In mdoc.h
+.In sys/types.h
+.In stdio.h
.In mandoc.h
-.Ft "enum mandoc_esc"
-.Fo mandoc_escape
-.Fa "const char const **end"
-.Fa "const char const **start"
-.Fa "int *sz"
-.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
+.Pp
+.Fd "#define ASCII_NBRSP"
+.Fd "#define ASCII_HYPH"
+.Fd "#define ASCII_BREAK"
+.Ft struct mparse *
.Fo mparse_alloc
-.Fa "enum mparset type"
-.Fa "enum mandoclevel wlevel"
-.Fa "mandocmsg msg"
-.Fa "void *msgarg"
+.Fa "int options"
+.Fa "enum mandoc_os oe_e"
+.Fa "char *os_s"
.Fc
.Ft void
.Fo mparse_free
.Fa "struct mparse *parse"
.Fc
.Ft void
-.Fo mparse_getkeep
+.Fo mparse_copy
.Fa "const struct mparse *parse"
.Fc
-.Ft void
-.Fo mparse_keep
+.Ft int
+.Fo mparse_open
.Fa "struct mparse *parse"
+.Fa "const char *fname"
.Fc
-.Ft "enum mandoclevel"
+.Ft void
.Fo mparse_readfd
.Fa "struct mparse *parse"
.Fa "int fd"
.Fo mparse_reset
.Fa "struct mparse *parse"
.Fc
-.Ft void
+.Ft struct roff_meta *
.Fo mparse_result
.Fa "struct mparse *parse"
-.Fa "struct mdoc **mdoc"
-.Fa "struct man **man"
-.Fc
-.Ft "const char *"
-.Fo mparse_strerror
-.Fa "enum mandocerr"
.Fc
-.Ft "const char *"
-.Fo mparse_strlevel
-.Fa "enum mandoclevel"
+.In roff.h
+.Ft void
+.Fo deroff
+.Fa "char **dest"
+.Fa "const struct roff_node *node"
.Fc
-.Vt extern const char * const * man_macronames;
+.In sys/types.h
+.In mandoc.h
+.In mdoc.h
.Vt extern const char * const * mdoc_argnames;
.Vt extern const char * const * mdoc_macronames;
-.Fd "#define ASCII_NBRSP"
-.Fd "#define ASCII_HYPH"
+.In sys/types.h
+.In mandoc.h
+.In man.h
+.Vt extern const char * const * man_macronames;
.Sh DESCRIPTION
The
.Nm mandoc
.Bl -enum
.It
initiate a parsing sequence with
+.Xr mchars_alloc 3
+and
.Fn mparse_alloc ;
.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 ;
.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 ;
.It
-iterate over parse nodes with
-.Fn mdoc_node
-or
-.Fn man_node ;
+if information about the validity of the input is needed, fetch it with
+.Fn mparse_updaterc ;
+.It
+iterate over parse nodes with starting from the
+.Fa first
+member of the returned
+.Vt struct roff_meta ;
.It
free all allocated memory with
-.Fn mparse_free ,
+.Fn mparse_free
+and
+.Xr mchars_free 3 ,
or invoke
.Fn mparse_reset
-and parse new files.
+and go back to step 2 to parse new files.
.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
This section documents the functions, types, and variables available
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
.Bl -ohang
-.It Vt "enum mandoc_esc"
-An escape sequence classification.
.It Vt "enum mandocerr"
-A fatal error, error, or warning message during parsing.
+An error or warning message during parsing.
.It Vt "enum mandoclevel"
A classification of an
-.Vt "enum mandoclevel"
+.Vt "enum mandocerr"
as regards system operation.
-.It Vt "struct mchars"
-An opaque pointer to an object allowing for translation between
-character strings and glyphs.
-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.
+See the DIAGNOSTICS section in
+.Xr mandoc 1
+regarding the meanings of the levels.
.It Vt "struct mparse"
An opaque pointer to a running parse sequence.
Created with
This may be used across parsed input if
.Fn mparse_reset
is called between parses.
-.It Vt "mandocmsg"
-A prototype for a function to handle fatal error, error, and warning
-messages emitted by the parser.
.El
.Ss Functions
.Bl -ohang
-.It Fn mandoc_escape
-Scan an escape sequence, i.e., a character string beginning with
-.Sq \e .
-Pass a pointer to the character after the
-.Sq \e
-as
-.Va end ;
-it will be set to the supremum of the parsed escape sequence unless
-returning
-.Dv ESCAPE_ERROR ,
-in which case the string is bogus and should be
-thrown away.
-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
-Get the parser used for the current output.
-Declared in
-.In man.h ,
-implemented in
-.Pa man.c .
-.It Fn man_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 man.h ,
-implemented in
-.Pa man.c .
-.It Fn mchars_alloc
-Allocate an
-.Vt "struct mchars *"
-object for translating special characters into glyphs.
-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 .
-Declared in
-.In mdoc.h ,
-implemented in
-.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 deroff
+Obtain a text-only representation of a
+.Vt struct roff_node ,
+including text contained in its child nodes.
+To be used on children of the
+.Fa first
+member of
+.Vt struct roff_meta .
+When it is no longer needed, the pointer returned from
+.Fn deroff
+can be passed to
+.Xr free 3 .
.It Fn mparse_alloc
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
+field of
+.Vt struct roff_meta .
+.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.
+.Pp
+When the
+.Dv MARSE_VALIDATE
+bit is set,
+.Fn mparse_result
+runs the validation functions before returning the syntax tree.
+This is almost always required, except in certain debugging scenarios,
+for example to dump unvalidated syntax trees.
+.It Ar os_e
+Operating system to check base system conventions for.
+If
+.Dv MANDOC_OS_OTHER ,
+the system is automatically detected from
+.Ic \&Os ,
+.Fl Ios ,
+or
+.Xr uname 3 .
+.It Ar os_s
+A default string for the
+.Xr mdoc 7
+.Ic \&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
.Fn mparse_reset
is called between parses.
.In mandoc.h ,
implemented in
.Pa read.c .
-.It Fn mparse_getkeep
-Acquire the keep buffer.
-Must follow a call of
-.Fn mparse_keep .
+.It Fn mparse_copy
+Dump a copy of the input to the standard output; used for
+.Fl man T Ns Cm man .
Declared in
.In mandoc.h ,
implemented in
.Pa read.c .
-.It Fn mparse_keep
-Instruct the parser to retain a copy of its parsed input.
-This can be acquired with subsequent
-.Fn mparse_getkeep
-calls.
+.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
-Parse a file or file descriptor.
-If
-.Va fd
-is -1,
-.Va fname
-is opened for reading.
-Otherwise,
-.Va fname
-is assumed to be the name associated with
-.Va fd .
-This may be called multiple times with different parameters; however,
+Parse a file descriptor opened with
+.Xr open 2
+or
+.Fn mparse_open .
+Pass the associated filename in
+.Va fname .
+This function may be called multiple times with different parameters; however,
+.Xr close 2
+and
.Fn mparse_reset
should be invoked between parses.
Declared in
.Pa read.c .
.It Fn mparse_result
Obtain the result of a parse.
-Only successful parses
-.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
-.In mandoc.h ,
-implemented in
-.Pa read.c .
-.It Fn mparse_strerror
-Return a statically-allocated string representation of an error code.
-Declared in
-.In mandoc.h ,
-implemented in
-.Pa read.c .
-.It Fn mparse_strlevel
-Return a statically-allocated string representation of a level code.
Declared in
.In mandoc.h ,
implemented in
.Ss Variables
.Bl -ohang
.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" .
.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" .
.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" .
.El
.Sh IMPLEMENTATION NOTES
A non-breaking space character.
.It Dv ASCII_HYPH
A soft hyphen.
+.It Dv ASCII_BREAK
+A breakable zero-width space.
.El
.Pp
Escape characters are also passed verbatim into text strings.
backslash
.Pq Sq \e .
To construct human-readable text, these should be intercepted with
-.Fn mandoc_escape
-and converted with one of
-.Fn mchars_num2char ,
-.Fn mchars_spec2str ,
-and so on.
+.Xr mandoc_escape 3
+and converted with one the functions described in
+.Xr mchars_alloc 3 .
.Ss Man Abstract Syntax Tree
This AST is governed by the ontological rules dictated in
.Xr man 7
and derives its terminology accordingly.
.Pp
The AST is composed of
-.Vt struct man_node
+.Vt struct roff_node
nodes with element, root and text types as declared by the
.Va type
field.
Each node also provides its parse point (the
.Va line ,
-.Va sec ,
+.Va pos ,
and
-.Va pos
+.Va sec
fields), its position in the tree (the
.Va parent ,
.Va child ,
.El
.Pp
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 .
.Ss Mdoc Abstract Syntax Tree
This AST is governed by the ontological
.Qq elements .
.Pp
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
by the
.Va type
field.
Each node also provides its parse point (the
.Va line ,
-.Va sec ,
+.Va pos ,
and
-.Va pos
+.Va sec
fields), its position in the tree (the
.Va parent ,
.Va child ,
-.Va nchild ,
+.Va last ,
.Va next
and
.Va prev
.Ed
.Pp
Here, the formatting of the
-.Sq \&Ao
+.Ic \&Ao
block extends from TEXT ao to TEXT ac,
while the formatting of the
-.Sq \&Bo
+.Ic \&Bo
block extends from TEXT bo to TEXT bc.
It renders as follows in
.Fl T Ns Cm ascii
.Em strongly discouraged ;
for example, the
.Fl T Ns Cm html
-and
-.Fl T Ns Cm xhtml
-front-ends to
+front-end to
.Xr mandoc 1
-are unable to render them in any meaningful way.
+is unable to render them in any meaningful way.
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.
.Sh SEE ALSO
.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 man 7 ,
.Xr mandoc_char 7 ,
.Xr roff 7 ,
.Xr tbl 7
.Sh AUTHORS
+.An -nosplit
The
.Nm
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 .
git.ckatri.com / mandoc.git / blobdiff