-.\" $Id: mdoc.3,v 1.33 2009/07/20 13:45:11 kristaps Exp $
+.\" $Id: mdoc.3,v 1.39 2010/05/25 21:46:48 kristaps Exp $
.\"
-.\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
+.\" Copyright (c) 2009-2010 Kristaps Dzonsons <kristaps@bsd.lv>
.\"
.\" 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: July 20 2009 $
+.Dd $Mdocdate: May 25 2010 $
.Dt MDOC 3
.Os
-.\" SECTION
.Sh NAME
+.Nm mdoc ,
.Nm mdoc_alloc ,
-.Nm mdoc_parseln ,
.Nm mdoc_endparse ,
-.Nm mdoc_node ,
-.Nm mdoc_meta ,
.Nm mdoc_free ,
+.Nm mdoc_meta ,
+.Nm mdoc_node ,
+.Nm mdoc_parseln ,
.Nm mdoc_reset
.Nd mdoc macro compiler library
-.\" SECTION
.Sh SYNOPSIS
-.Fd #include <mdoc.h>
+.In mandoc.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" "int pflags" "const struct mdoc_cb *cb"
+.Fn mdoc_alloc "void *data" "int pflags" "mandocmsg msgs"
.Ft int
-.Fn mdoc_reset "struct mdoc *mdoc"
+.Fn mdoc_endparse "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 "const struct mdoc *mdoc"
.Ft "const struct mdoc_meta *"
.Fn mdoc_meta "const struct mdoc *mdoc"
+.Ft "const struct mdoc_node *"
+.Fn mdoc_node "const struct mdoc *mdoc"
.Ft int
-.Fn mdoc_endparse "struct mdoc *mdoc"
-.\" SECTION
+.Fn mdoc_parseln "struct mdoc *mdoc" "int line" "char *buf"
+.Ft int
+.Fn mdoc_reset "struct mdoc *mdoc"
.Sh DESCRIPTION
The
.Nm mdoc
library parses lines of
.Xr mdoc 7
-input (and
-.Em only
-mdoc) into an abstract syntax tree (AST).
-.\" PARAGRAPH
+input
+into an abstract syntax tree (AST).
.Pp
In general, applications initiate a parsing sequence with
.Fn mdoc_alloc ,
The
.Fn mdoc_reset
function may be used in order to reset the parser for another input
-sequence. See the
+sequence.
+See the
.Sx EXAMPLES
-section for a full example.
-.\" PARAGRAPH
+section for a simple example.
.Pp
This section further defines the
.Sx Types ,
.Sx Functions
and
.Sx Variables
-available to programmers. Following that, the
+available to programmers.
+Following that, the
.Sx Abstract Syntax Tree
section documents the output tree.
-.\" SUBSECTION
.Ss Types
Both functions (see
.Sx Functions )
and variables (see
.Sx Variables )
may use the following types:
-.Bl -ohang -offset "XXXX"
-.\" LIST-ITEM
+.Bl -ohang
.It Vt struct mdoc
An opaque type defined in
.Pa mdoc.c .
Its values are only used privately within the library.
-.\" LIST-ITEM
-.It Vt struct mdoc_cb
-A set of message callbacks defined in
-.Pa mdoc.h .
-.\" LIST-ITEM
.It Vt struct mdoc_node
-A parsed node. Defined in
+A parsed node.
+Defined in
.Pa mdoc.h .
See
.Sx Abstract Syntax Tree
for details.
+.It Vt mandocmsg
+A function callback type defined in
+.Pa mandoc.h .
.El
-.\" SUBSECTION
.Ss Functions
Function descriptions follow:
-.Bl -ohang -offset "XXXX"
-.\" LIST-ITEM
+.Bl -ohang
.It Fn mdoc_alloc
-Allocates a parsing structure. The
+Allocates a parsing structure.
+The
.Fa data
pointer is passed to callbacks in
.Fa cb ,
.Fa pflags
arguments are defined in
.Pa mdoc.h .
-Returns NULL on failure. If non-NULL, the pointer must be freed with
+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,
+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
+behaves as if invoked for the first time.
+If it returns 0, memory could not be allocated.
.It Fn mdoc_free
-Free all resources of a parser. The pointer is no longer valid after
-invocation.
-.\" LIST-ITEM
+Free all resources of a parser.
+The pointer is no longer valid after invocation.
.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
+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
.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
+the resulting tree is incomplete.
+Returns 0 on failure, 1 on success.
.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
+Returns the document's parsed meta-data.
+If this information has not yet been supplied or
.Fn mdoc_parseln
or
.Fn mdoc_endparse
return 0, the data will be incomplete.
.El
-.\" SUBSECTION
.Ss Variables
The following variables are also defined:
-.Bl -ohang -offset "XXXX"
-.\" LIST-ITEM
+.Bl -ohang
.It Va mdoc_macronames
An array of string-ified token names.
-.\" LIST-ITEM
.It Va mdoc_argnames
An array of string-ified token argument names.
.El
-.\" SUBSECTION
.Ss Abstract Syntax Tree
The
.Nm
functions produce an abstract syntax tree (AST) describing input in a
-regular form. It may be reviewed at any time with
+regular form.
+It may be reviewed at any time with
.Fn mdoc_nodes ;
however, if called before
.Fn mdoc_endparse ,
or
.Fn mdoc_parseln
fail, it may be incomplete.
-.\" PARAGRAPH
.Pp
This AST is governed by the ontological
rules dictated 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
.Va type
-field. Each node also provides its parse point (the
+field.
+Each node also provides its parse point (the
.Va line ,
.Va sec ,
and
and
.Va prev
fields) and some type-specific data.
-.\" PARAGRAPH
.Pp
The tree itself is arranged according to the following normal form,
where capitalised non-terminals represent nodes.
.Pp
-.Bl -tag -width "ELEMENTXX" -compact -offset "XXXX"
-.\" LIST-ITEM
+.Bl -tag -width "ELEMENTXX" -compact
.It ROOT
\(<- mnode+
.It mnode
.It TAIL
\(<- mnode+
.It TEXT
-\(<- [[:alpha:]]*
+\(<- [[:printable:],0x1e]*
.El
-.\" PARAGRAPH
.Pp
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 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
.Sq \&.Bd \-literal ,
an empty line will produce a zero-length string.
-.\" SECTION
.Sh EXAMPLES
The following example reads lines from stdin and parses them, operating
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
-.Xr fgetln 3 ) .
-Further, this example does not error-check nor free memory upon failure.
-.Bd -literal -offset "XXXX"
+This example does not error-check nor free memory upon failure.
+.Bd -literal -offset indent
struct mdoc *mdoc;
const struct mdoc_node *node;
char *buf;
line = 1;
mdoc = mdoc_alloc(NULL, 0, NULL);
+buf = NULL;
+alloc_len = 0;
-while ((buf = fgetln(fp, &len))) {
- buf[len - 1] = '\\0';
- if ( ! mdoc_parseln(mdoc, line, buf))
- errx(1, "mdoc_parseln");
- line++;
+while ((len = getline(&buf, &alloc_len, stdin)) >= 0) {
+ if (len && buflen[len - 1] = '\en')
+ buf[len - 1] = '\e0';
+ if ( ! mdoc_parseln(mdoc, line, buf))
+ errx(1, "mdoc_parseln");
+ line++;
}
if ( ! mdoc_endparse(mdoc))
- errx(1, "mdoc_endparse");
+ errx(1, "mdoc_endparse");
if (NULL == (node = mdoc_node(mdoc)))
- errx(1, "mdoc_node");
+ errx(1, "mdoc_node");
parsed(mdoc, node);
mdoc_free(mdoc);
.Ed
-.\" SECTION
+.Pp
+Please see
+.Pa main.c
+in the source archive for a rigorous reference.
.Sh SEE ALSO
.Xr mandoc 1 ,
.Xr mdoc 7
-.\" SECTION
.Sh AUTHORS
The
.Nm
-utility was written by
-.An Kristaps Dzonsons Aq kristaps@kth.se .
-.\" SECTION
-.Sh CAVEATS
-.Bl -dash -compact
-.\" LIST-ITEM
-.It
-The
-.Sq \&.Xc
-and
-.Sq \&.Xo
-macros aren't handled when used to span lines for the
-.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
-Columns widths in
-.Sq \&.Bl \-column
-should default to width
-.Qq <stringx>
-if not included.
-.El
+library was written by
+.An Kristaps Dzonsons Aq kristaps@bsd.lv .
git.ckatri.com / mandoc.git / blobdiff