===================================================================
RCS file: /cvs/mandoc/mandoc.3,v
retrieving revision 1.19
retrieving revision 1.29
diff -u -p -r1.19 -r1.29
--- mandoc/mandoc.3	2013/07/13 19:41:16	1.19
+++ mandoc/mandoc.3	2014/11/26 23:42:14	1.29
@@ -1,4 +1,4 @@
-.\"	$Id: mandoc.3,v 1.19 2013/07/13 19:41:16 schwarze Exp $
+.\"	$Id: mandoc.3,v 1.29 2014/11/26 23:42:14 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
@@ -15,99 +15,60 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: July 13 2013 $
+.Dd $Mdocdate: November 26 2014 $
 .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
+.Nm mparse_wait ,
 .Nd mandoc macro compiler library
 .Sh LIBRARY
-.Lb mandoc
+.Lb libmandoc
 .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 **end"
-.Fa "const char **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
-.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"
-.Ft "const char *"
-.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
+.Fd "#define ASCII_NBRSP"
+.Fd "#define ASCII_HYPH"
+.Fd "#define ASCII_BREAK"
+.Ft struct mparse *
 .Fo mparse_alloc
-.Fa "enum mparset type"
+.Fa "int options"
 .Fa "enum mandoclevel wlevel"
-.Fa "mandocmsg msg"
-.Fa "void *msgarg"
+.Fa "mandocmsg mmsg"
+.Fa "const struct mchars *mchars"
+.Fa "char *defos"
 .Fc
 .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
 .Fa "struct mparse *parse"
 .Fc
-.Ft void
+.Ft const char *
 .Fo mparse_getkeep
 .Fa "const struct mparse *parse"
 .Fc
@@ -116,6 +77,12 @@
 .Fa "struct mparse *parse"
 .Fc
 .Ft "enum mandoclevel"
+.Fo mparse_open
+.Fa "struct mparse *parse"
+.Fa "int *fd"
+.Fa "const char *fname"
+.Fc
+.Ft "enum mandoclevel"
 .Fo mparse_readfd
 .Fa "struct mparse *parse"
 .Fa "int fd"
@@ -130,6 +97,7 @@
 .Fa "struct mparse *parse"
 .Fa "struct mdoc **mdoc"
 .Fa "struct man **man"
+.Fa "char **sodest"
 .Fc
 .Ft "const char *"
 .Fo mparse_strerror
@@ -139,11 +107,49 @@
 .Fo mparse_strlevel
 .Fa "enum mandoclevel"
 .Fc
-.Vt extern const char * const * man_macronames;
+.Ft "enum mandoclevel"
+.Fo mparse_wait
+.Fa "struct mparse *parse"
+.Fc
+.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
@@ -166,6 +172,8 @@ 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
@@ -180,42 +188,35 @@ 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.
 .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.
+An opaque pointer to a a character table.
+Created with
+.Xr mchars_alloc 3
+and freed with
+.Xr mchars_free 3 .
 .It Vt "struct mparse"
 An opaque pointer to a running parse sequence.
 Created with
@@ -231,38 +232,20 @@ 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_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
@@ -276,67 +259,29 @@ Declared in
 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 .
 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_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
@@ -344,7 +289,9 @@ Declared in
 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
@@ -353,6 +300,60 @@ 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_FATAL ,
+.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 mchars
+An opaque pointer to a a character table obtained from
+.Xr mchars_alloc 3 .
+.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.
@@ -386,18 +387,47 @@ Declared in
 .In mandoc.h ,
 implemented in
 .Pa read.c .
+.It Fn mparse_open
+If the
+.Fa fname
+ends in
+.Pa .gz ,
+open with
+.Xr gunzip 1 ;
+otherwise, with
+.Xr open 2 .
+If
+.Xr open 2
+fails, append
+.Pa .gz
+and try with
+.Xr gunzip 1 .
+Return a file descriptor open for reading in
+.Fa fd ,
+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,
+is -1, open
 .Va fname
-is opened for reading.
+with
+.Fn mparse_open .
 Otherwise,
 .Va fname
 is assumed to be the name associated with
 .Va fd .
-This may be called multiple times with different parameters; however,
+Calls
+.Fn mparse_wait
+before returning.
+This function may be called multiple times with different parameters; however,
 .Fn mparse_reset
 should be invoked between parses.
 Declared in
@@ -420,7 +450,7 @@ 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
+should invoke this function, in which case one of the three pointers will
 be filled in.
 Declared in
 .In mandoc.h ,
@@ -438,6 +468,28 @@ Declared in
 .In mandoc.h ,
 implemented in
 .Pa read.c .
+.It Fn mparse_wait
+Bury a
+.Xr gunzip 1
+child process that was spawned with
+.Fn mparse_open .
+To be called after the parse sequence is complete.
+Not needed after
+.Fn mparse_readfd ,
+but does no harm in that case, either.
+Returns
+.Dv MANDOCLEVEL_OK
+on success and
+.Dv MANDOCLEVEL_SYSERR
+on failure, that is, when
+.Xr wait 2
+fails, or when
+.Xr gunzip 1
+died from a signal or exited with non-zero status.
+Declared in
+.In mandoc.h ,
+implemented in
+.Pa read.c .
 .El
 .Ss Variables
 .Bl -ohang
@@ -474,6 +526,8 @@ 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.
@@ -481,11 +535,9 @@ 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
@@ -530,7 +582,7 @@ 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
@@ -666,10 +718,13 @@ 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 ,