===================================================================
RCS file: /cvs/mandoc/mandoc.3,v
retrieving revision 1.13
retrieving revision 1.35
diff -u -p -r1.13 -r1.35
--- mandoc/mandoc.3	2011/08/18 08:58:44	1.13
+++ mandoc/mandoc.3	2016/01/08 02:53:13	1.35
@@ -1,7 +1,7 @@
-.\"	$Id: mandoc.3,v 1.13 2011/08/18 08:58:44 kristaps Exp $
+.\"	$Id: mandoc.3,v 1.35 2016/01/08 02:53:13 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
-.\" Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
+.\" Copyright (c) 2010, 2013, 2014, 2015 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
@@ -15,90 +15,68 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: August 18 2011 $
+.Dd $Mdocdate: January 8 2016 $
 .Dt MANDOC 3
 .Os
 .Sh NAME
 .Nm mandoc ,
-.Nm mandoc_escape ,
+.Nm man_deroff ,
 .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_deroff ,
 .Nm mdoc_meta ,
 .Nm mdoc_node ,
 .Nm mparse_alloc ,
 .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
 .Nd mandoc macro compiler library
-.Sh LIBRARY
-.Lb mandoc
 .Sh SYNOPSIS
-.In man.h
-.In mdoc.h
+.In sys/types.h
 .In mandoc.h
-.Ft "enum mandoc_esc"
-.Fo mandoc_escape
-.Fa "const char **in"
-.Fa "const char **seq"
-.Fa "int *len"
+.Pp
+.Fd "#define ASCII_NBRSP"
+.Fd "#define ASCII_HYPH"
+.Fd "#define ASCII_BREAK"
+.Ft struct mparse *
+.Fo mparse_alloc
+.Fa "int options"
+.Fa "enum mandoclevel wlevel"
+.Fa "mandocmsg mmsg"
+.Fa "char *defos"
 .Fc
-.Ft "const struct man_meta *"
-.Fo man_meta
-.Fa "const struct man *man"
+.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 "const struct man_node *"
-.Fo man_node
-.Fa "const struct man *man"
-.Fc
-.Ft "struct mchars *"
-.Fn mchars_alloc
 .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 "struct mchars *p"
-.Fa "const char *cp"
-.Fa "size_t sz"
-.Fa "size_t *rsz"
+.Fo mparse_free
+.Fa "struct mparse *parse"
 .Fc
-.Ft int
-.Fo mchars_spec2cp
-.Fa "struct mchars *p"
-.Fa "const char *cp"
-.Fa "size_t sz"
-.Ft "const char *"
+.Ft const char *
+.Fo mparse_getkeep
+.Fa "const struct mparse *parse"
 .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
-.Fa "enum mparset type"
-.Fa "enum mandoclevel wlevel"
-.Fa "mandocmsg msg"
-.Fa "void *msgarg"
+.Fo mparse_keep
+.Fa "struct mparse *parse"
 .Fc
-.Ft void
-.Fo mparse_free
+.Ft int
+.Fo mparse_open
 .Fa "struct mparse *parse"
+.Fa "const char *fname"
 .Fc
 .Ft "enum mandoclevel"
 .Fo mparse_readfd
@@ -115,6 +93,7 @@
 .Fa "struct mparse *parse"
 .Fa "struct mdoc **mdoc"
 .Fa "struct man **man"
+.Fa "char **sodest"
 .Fc
 .Ft "const char *"
 .Fo mparse_strerror
@@ -124,11 +103,45 @@
 .Fo mparse_strlevel
 .Fa "enum mandoclevel"
 .Fc
-.Vt extern const char * const * man_macronames;
+.In sys/types.h
+.In mandoc.h
+.In mdoc.h
+.Ft void
+.Fo mdoc_deroff
+.Fa "char **dest"
+.Fa "const struct mdoc_node *node"
+.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
 .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
+.Ft void
+.Fo man_deroff
+.Fa "char **dest"
+.Fa "const struct man_node *node"
+.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
+.Vt extern const char * const * man_macronames;
 .Sh DESCRIPTION
 The
 .Nm mandoc
@@ -151,12 +164,22 @@ The following describes a general parse sequence:
 .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
@@ -165,42 +188,29 @@ or
 .Fn man_node ;
 .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.
 .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.
 .It Vt "struct mparse"
 An opaque pointer to a running parse sequence.
 Created with
@@ -211,121 +221,223 @@ 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
+A prototype for a function to handle 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 this string 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 .
+.It Fn man_deroff
+Obtain a text-only representation of a
+.Vt struct man_node ,
+including text contained in its child nodes.
+To be used on children of the pointer returned from
+.Fn man_node .
+When it is no longer needed, the pointer returned from
+.Fn man_deroff
+can be passed to
+.Xr free 3 .
 .It Fn man_meta
-Obtain the meta-data of a successful parse.
+Obtain the meta-data of a successful
+.Xr man 7
+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.
+Obtain the root node of a successful
+.Xr man 7
+parse.
 This may only be used on a pointer returned by
 .Fn mparse_result .
-.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 .
-.It Fn mchars_free
-Free an object created with
-.Fn mchars_alloc .
-.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.
-.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.
-.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.
-.It Fn mchars_spec2str
-Convert a special character into an ASCII string.
-Returns
-.Dv NULL
-on failure.
+Declared in
+.In man.h ,
+implemented in
+.Pa man.c .
+.It Fn mdoc_deroff
+Obtain a text-only representation of a
+.Vt struct mdoc_node ,
+including text contained in its child nodes.
+To be used on children of the pointer returned from
+.Fn mdoc_node .
+When it is no longer needed, the pointer returned from
+.Fn mdoc_deroff
+can be passed to
+.Xr free 3 .
 .It Fn mdoc_meta
-Obtain the meta-data of a successful parse.
+Obtain the meta-data of a successful
+.Xr mdoc
+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.
+Obtain the root node of a successful
+.Xr mdoc
+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
 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.
+.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 .
+.El
+.Pp
 The same parser may be used for multiple files so long as
 .Fn mparse_reset
 is called between parses.
 .Fn mparse_free
 must be called to free the memory allocated by this function.
+Declared in
+.In mandoc.h ,
+implemented in
+.Pa read.c .
 .It Fn mparse_free
 Free all memory allocated by
 .Fn mparse_alloc .
+Declared in
+.In mandoc.h ,
+implemented in
+.Pa read.c .
+.It Fn mparse_getkeep
+Acquire the keep buffer.
+Must follow a call of
+.Fn mparse_keep .
+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.
+Declared in
+.In mandoc.h ,
+implemented in
+.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
-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
+.In mandoc.h ,
+implemented in
+.Pa read.c .
 .It Fn mparse_reset
 Reset a parser so that
 .Fn mparse_readfd
 may be used again.
+Declared in
+.In mandoc.h ,
+implemented 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.
+One of the three 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
+.Pa read.c .
 .El
 .Ss Variables
 .Bl -ohang
@@ -362,6 +474,8 @@ The following non-printing characters may be embedded 
 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.
@@ -369,11 +483,9 @@ An escape character is a sequence of characters beginn
 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
@@ -418,7 +530,7 @@ where capitalised non-terminals represent nodes.
 .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
@@ -554,10 +666,13 @@ front-ends to
 .Xr mandoc 1
 are 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 mandoc_escape 3 ,
+.Xr mandoc_malloc 3 ,
+.Xr mchars_alloc 3 ,
 .Xr eqn 7 ,
 .Xr man 7 ,
 .Xr mandoc_char 7 ,
@@ -568,5 +683,4 @@ levels of badly-nested blocks.
 The
 .Nm
 library was written by
-.An Kristaps Dzonsons ,
-.Mt kristaps@bsd.lv .
+.An Kristaps Dzonsons Aq Mt kristaps@bsd.lv .