-.\" $Id: mdoc.3,v 1.16 2009/03/12 23:05:21 kristaps Exp $
+.\" $Id: mdoc.3,v 1.35 2009/10/03 16:36:06 kristaps Exp $
.\"
.\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
-.\" purpose with or without fee is hereby granted, provided that the
-.\" above copyright notice and this permission notice appear in all
-.\" copies.
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
.\"
-.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
-.\" WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
-.\" WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
-.\" AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
-.\" DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
-.\" PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-.\" TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
-.\" PERFORMANCE OF THIS SOFTWARE.
-.\"
-.Dd $Mdocdate: March 12 2009 $
-.Dt mdoc 3
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" 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 3 2009 $
+.Dt MDOC 3
.Os
.\" SECTION
.Sh NAME
.Nm mdoc_endparse ,
.Nm mdoc_node ,
.Nm mdoc_meta ,
-.Nm mdoc_free
+.Nm mdoc_free ,
+.Nm mdoc_reset
.Nd mdoc macro compiler library
.\" SECTION
.Sh SYNOPSIS
-.Fd #include <mdoc.h>
+.In mdoc.h
.Vt extern const char * const * mdoc_macronames;
.Vt extern const char * const * mdoc_argnames;
.Ft "struct mdoc *"
-.Fn mdoc_alloc "void *data" "const struct mdoc_cb *cb"
+.Fn mdoc_alloc "void *data" "int pflags" "const struct mdoc_cb *cb"
+.Ft int
+.Fn mdoc_reset "struct mdoc *mdoc"
.Ft void
.Fn mdoc_free "struct mdoc *mdoc"
.Ft int
.Fn mdoc_parseln "struct mdoc *mdoc" "int line" "char *buf"
.Ft "const struct mdoc_node *"
-.Fn mdoc_node "struct mdoc *mdoc"
+.Fn mdoc_node "const struct mdoc *mdoc"
.Ft "const struct mdoc_meta *"
-.Fn mdoc_meta "struct mdoc *mdoc"
+.Fn mdoc_meta "const struct mdoc *mdoc"
.Ft int
.Fn mdoc_endparse "struct mdoc *mdoc"
.\" SECTION
.Sh DESCRIPTION
The
.Nm mdoc
-library parses lines of mdoc input into an abstract syntax tree.
-.Dq mdoc ,
-which is used to format BSD manual pages, is a macro package of the
-.Dq roff
-language. The
-.Nm
-library implements only those macros documented in the
+library parses lines of
.Xr mdoc 7
-and
-.Xr mdoc.samples 7
-manuals. Documents with
-.Xr refer 1 ,
-.Xr eqn 1
-and other pre-processor sections aren't accomodated.
-.\" PARAGRAPH
-.Pp
-.Nm
-is
-.Ud
+input (and
+.Em only
+mdoc) into an abstract syntax tree (AST).
.\" PARAGRAPH
.Pp
In general, applications initiate a parsing sequence with
.Fn mdoc_alloc ,
-parse each line in a document with
+parse each line in a document with
.Fn mdoc_parseln ,
close the parsing session with
.Fn mdoc_endparse ,
operate over the syntax tree returned by
-.Fn mdoc_node
+.Fn mdoc_node
and
.Fn mdoc_meta ,
then free all allocated memory with
.Fn mdoc_free .
-See the
+The
+.Fn mdoc_reset
+function may be used in order to reset the parser for another input
+sequence. See the
.Sx EXAMPLES
section for a full example.
.\" PARAGRAPH
.Pp
-This section further defines the
+This section further defines the
.Sx Types ,
-.Sx Functions
+.Sx Functions
and
.Sx Variables
-available to programmers. Following that,
-.Sx Character Encoding
-describes input format. Lastly,
-.Sx Abstract Syntax Tree ,
-documents the output tree.
+available to programmers. Following that, the
+.Sx Abstract Syntax Tree
+section documents the output tree.
.\" SUBSECTION
.Ss Types
Both functions (see
.It Vt struct mdoc_node
A parsed node. Defined in
.Pa mdoc.h .
-See
+See
.Sx Abstract Syntax Tree
for details.
.El
Allocates a parsing structure. The
.Fa data
pointer is passed to callbacks in
-.Fa cb ,
-which are documented further in the header file. Returns NULL on
-failure. If non-NULL, the pointer must be freed with
+.Fa cb ,
+which are documented further in the header file.
+The
+.Fa pflags
+arguments are defined in
+.Pa mdoc.h .
+Returns NULL on failure. If non-NULL, the pointer must be freed with
.Fn mdoc_free .
.\" LIST-ITEM
+.It Fn mdoc_reset
+Reset the parser for another parse routine. After its use,
+.Fn mdoc_parseln
+behaves as if invoked for the first time. If it returns 0, memory could
+not be allocated.
+.\" LIST-ITEM
.It Fn mdoc_free
Free all resources of a parser. The pointer is no longer valid after
invocation.
.\" LIST-ITEM
.It Fn mdoc_parseln
Parse a nil-terminated line of input. This line should not contain the
-trailing newline. Returns 0 on failure, 1 on success. The input buffer
+trailing newline. Returns 0 on failure, 1 on success. The input buffer
.Fa buf
is modified by this function.
.\" LIST-ITEM
.It Fn mdoc_endparse
-Signals that the parse is complete. Note that if
+Signals that the parse is complete. Note that if
.Fn mdoc_endparse
is called subsequent to
.Fn mdoc_node ,
the resulting tree is incomplete. Returns 0 on failure, 1 on success.
.\" LIST-ITEM
.It Fn mdoc_node
-Returns the first node of the parse. Note that if
+Returns the first node of the parse. Note that if
.Fn mdoc_parseln
or
.Fn mdoc_endparse
return 0, the tree will be incomplete.
.It Fn mdoc_meta
Returns the document's parsed meta-data. If this information has not
-yet been supplied or
+yet been supplied or
.Fn mdoc_parseln
or
.Fn mdoc_endparse
An array of string-ified token argument names.
.El
.\" SUBSECTION
-.Ss Character Encoding
-The
-.Xr mdoc 3
-library accepts only printable ASCII characters as defined by
-.Xr isprint 3 .
-Non-ASCII character sequences are delimited in various ways. All are
-preceeded by an escape character
-.Sq \\
-and followed by either an open-parenthesis
-.Sq \&(
-for two-character sequences; an open-bracket
-.Sq \&[
-for n-character sequences (terminated at a close-bracket
-.Sq \&] ) ;
-an asterisk and open-parenthesis
-.Sq \&*(
-for two-character sequences;
-an asterisk and non-open-parenthesis
-.Sq \&*
-for single-character sequences; or one of a small set of standalone
-single characters for other escapes.
-.\" PARAGRAPH
-.Pp
-Examples:
-.Pp
-.Bl -tag -width "XXXXXXXX" -offset "XXXX" -compact
-.\" LIST-ITEM
-.It \\*(<=
-prints
-.Dq \*(<=
-.Pq greater-equal
-.\" LIST-ITEM
-.It \\(<-
-prints
-.Dq \(<-
-.Pq left-arrow
-.\" LIST-ITEM
-.It \\[<-]
-also prints
-.Dq \(<-
-.Pq left-arrow
-.\" LIST-ITEM
-.It \\*(Ba
-prints
-.Dq \*(Ba
-.Pq bar
-.\" LIST-ITEM
-.It \\*q
-prints
-.Dq \*q
-.Pq double-quote
-.El
-.\" PARAGRAPH
-.Pp
-All escaped sequences are syntax-checked, but it's up to the front-end
-system to correctly render them to the output device.
-.\" SUBSECTION
.Ss Abstract Syntax Tree
-The
+The
.Nm
-functions produce an abstract syntax tree (AST) describing the input
-lines in a regular form. It may be reviewed at any time with
+functions produce an abstract syntax tree (AST) describing input in a
+regular form. It may be reviewed at any time with
.Fn mdoc_nodes ;
however, if called before
.Fn mdoc_endparse ,
or after
-.Fn mdoc_endparse
+.Fn mdoc_endparse
or
.Fn mdoc_parseln
fail, it may be incomplete.
.\" PARAGRAPH
.Pp
-The AST is composed of
+This AST is governed by the ontological
+rules dictated in
+.Xr mdoc 7
+and derives its terminology accordingly.
+.Qq In-line
+elements described in
+.Xr mdoc 7
+are described simply as
+.Qq elements .
+.\" PARAGRAPH
+.Pp
+The AST is composed of
.Vt struct mdoc_node
nodes with block, head, body, element, root and text types as declared
by the
fields), its position in the tree (the
.Va parent ,
.Va child ,
-.Va next
+.Va next
and
-.Va prev
-fields) and type-specific data (the
-.Va data
-field).
+.Va prev
+fields) and some type-specific data.
.\" PARAGRAPH
.Pp
The tree itself is arranged according to the following normal form,
Of note are the TEXT nodes following the HEAD, BODY and TAIL nodes of
the BLOCK production. These refer to punctuation marks. Furthermore,
although a TEXT node will generally have a non-zero-length string, in
-the specific case of
+the specific case of
.Sq \&.Bd \-literal ,
an empty line will produce a zero-length string.
-.\" PARAGRAPH
-.Pp
-The rule-of-thumb for mapping node types to macros follows. In-line
-elements, such as
-.Sq \&.Em foo ,
-are classified as ELEMENT nodes, which can only contain text.
-Multi-line elements, such as
-.Sq \&.Sh ,
-are BLOCK elements, where the HEAD constitutes line contents and the
-BODY constitutes subsequent lines. In-line elements with matching
-pairs, such as
-.Sq \&.So
-and
-.Sq \&.Sc ,
-are BLOCK elements with no HEAD tag. The only exception to this is
-.Sq \&.Eo
-and
-.Sq \&.Ec ,
-which has a HEAD and TAIL node corresponding to the enclosure string.
-TEXT nodes, obviously, constitute text, and the ROOT node is the
-document's root.
.\" SECTION
.Sh EXAMPLES
The following example reads lines from stdin and parses them, operating
-on the finished parse tree with
+on the finished parse tree with
.Fn parsed .
Note that, if the last line of the file isn't newline-terminated, this
-will truncate the file's last character (see
+will truncate the file's last character (see
.Xr fgetln 3 ) .
Further, this example does not error-check nor free memory upon failure.
.Bd -literal -offset "XXXX"
struct mdoc *mdoc;
-struct mdoc_node *node;
+const struct mdoc_node *node;
char *buf;
size_t len;
int line;
line = 1;
-mdoc = mdoc_alloc(NULL, NULL);
+mdoc = mdoc_alloc(NULL, 0, NULL);
while ((buf = fgetln(fp, &len))) {
buf[len - 1] = '\\0';
mdoc_free(mdoc);
.Ed
.\" SECTION
-.Sh COMPATIBILITY
-In general, only those macros specified by
-.Xr mdoc.samples 7
-and
-.Xr mdoc 7
-for
-.Ox
-and
-.Nx
-are supported; support for other
-.Bx
-systems is in progress.
-.Bl -bullet
-.\" LIST-ITEM
-.It
-.Sq \&Cd
-isn't labelled as callable but is.
-.\" LIST-ITEM
-.It
-NetBSD
-.Sq \&It \-nested
-is assumed for all lists: any list may be nested and
-.Sq \-enum
-lists will restart the sequence only for the sub-list.
-.\" LIST-ITEM
-.It
-Newer NetBSD-style
-.Sq \&It \-column
-syntax, where column widths may be preceeded by other arguments (instead
-of proceeded), is not supported.
-.\" LIST-ITEM
-.It
-The
-.Sq \&At
-macro only accepts a single parameter.
-.\" LIST-ITEM
-.It
-Some manuals use
-.Sq \&Li
-incorrectly by following it with a delimeter (see
-.Xr mdoc.samples 7 )
-and expecting the delimiter to render. This is not supported.
-.\" LIST-ITEM
-.It
-The system-name macros (
-.Ns Sq \&At ,
-.Sq \&Bsx ,
-.Sq \&Bx ,
-.Sq \&Fx ,
-.Sq \&Nx ,
-.Sq \&Ox ,
-and
-.Sq \&Ux )
-are callable.
-.El
-.\" SECTION
.Sh SEE ALSO
-.Xr mdoc 7 ,
-.Xr mdoc.samples 7 ,
-.Xr groff 1 ,
-.Xr mdocml 1
+.Xr mandoc 1 ,
+.Xr mdoc 7
.\" SECTION
.Sh AUTHORS
The
.Nm
-utility was written by
+utility was written by
.An Kristaps Dzonsons Aq kristaps@kth.se .
.\" SECTION
.Sh CAVEATS
-.Bl -bullet
+.Bl -dash -compact
.\" LIST-ITEM
.It
-The
-.Sq \&Xc
+The
+.Sq \&.Xc
and
-.Sq \&Xo
+.Sq \&.Xo
macros aren't handled when used to span lines for the
-.Sq \&It
-macro. Such usage is specifically discouraged in
-.Xr mdoc.samples 7 .
+.Sq \&.It
+macro.
+.\" LIST-ITEM
+.It
+The
+.Sq \&.Bsx
+macro family doesn't yet understand version arguments.
+.\" LIST-ITEM
+.It
+If not given a value, the \-offset argument to
+.Sq \&.Bd
+and
+.Sq \&.Bl
+should be the width of
+.Qq <string> ;
+instead, a value of
+.Li 10n
+is provided.
.\" LIST-ITEM
.It
-The
-.Sq \&Bsx
-macro doesn't understand yet the arguments as dictated for
-.Nx .
+Columns widths in
+.Sq \&.Bl \-column
+should default to width
+.Qq <stringx>
+if not included.
.El
git.ckatri.com / mandoc.git / blobdiff