-.\" $Id: man.3,v 1.4 2009/06/10 20:18:43 kristaps Exp $
+.\" $Id: man.3,v 1.12 2010/02/17 19:22:01 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: June 10 2009 $
+.Dd $Mdocdate: February 17 2010 $
.Dt MAN 3
.Os
.\" SECTION
.Nd man macro compiler library
.\" SECTION
.Sh SYNOPSIS
-.Fd #include <man.h>
+.In man.h
.Vt extern const char * const * man_macronames;
.Ft "struct man *"
.Fn man_alloc "void *data" "int pflags" "const struct man_cb *cb"
.Ft int
.Fn man_parseln "struct man *man" "int line" "char *buf"
.Ft "const struct man_node *"
-.Fn man_node "struct man *man"
+.Fn man_node "const struct man *man"
.Ft "const struct man_meta *"
-.Fn man_meta "struct man *man"
+.Fn man_meta "const struct man *man"
.Ft int
.Fn man_endparse "struct man *man"
.\" SECTION
.Sh DESCRIPTION
The
.Nm man
-library parses lines of
+library parses lines of
.Xr man 7
input (and
.Em only
.Pp
In general, applications initiate a parsing sequence with
.Fn man_alloc ,
-parse each line in a document with
+parse each line in a document with
.Fn man_parseln ,
close the parsing session with
.Fn man_endparse ,
operate over the syntax tree returned by
-.Fn man_node
+.Fn man_node
and
.Fn man_meta ,
then free all allocated memory with
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, the
-.Sx Abstract Syntax Tree
+.Sx Abstract Syntax Tree
section documents the output tree.
.\" SUBSECTION
.Ss Types
and variables (see
.Sx Variables )
may use the following types:
-.Bl -ohang -offset "XXXX"
+.Bl -ohang
.\" LIST-ITEM
.It Vt struct man
An opaque type defined in
.It Vt struct man_node
A parsed node. Defined in
.Pa man.h .
-See
+See
.Sx Abstract Syntax Tree
for details.
.El
.\" SUBSECTION
.Ss Functions
Function descriptions follow:
-.Bl -ohang -offset "XXXX"
+.Bl -ohang
.\" LIST-ITEM
.It Fn man_alloc
Allocates a parsing structure. The
.Fa data
pointer is passed to callbacks in
-.Fa cb ,
-which are documented further in the header file.
+.Fa cb ,
+which are documented further in the header file.
The
.Fa pflags
arguments are defined in
.Fn man_free .
.\" LIST-ITEM
.It Fn man_reset
-Reset the parser for another parse routine. After its use,
+Reset the parser for another parse routine. After its use,
.Fn man_parseln
behaves as if invoked for the first time.
.\" LIST-ITEM
.\" LIST-ITEM
.It Fn man_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 man_endparse
-Signals that the parse is complete. Note that if
+Signals that the parse is complete. Note that if
.Fn man_endparse
is called subsequent to
.Fn man_node ,
the resulting tree is incomplete. Returns 0 on failure, 1 on success.
.\" LIST-ITEM
.It Fn man_node
-Returns the first node of the parse. Note that if
+Returns the first node of the parse. Note that if
.Fn man_parseln
or
.Fn man_endparse
return 0, the tree will be incomplete.
.It Fn man_meta
Returns the document's parsed meta-data. If this information has not
-yet been supplied or
+yet been supplied or
.Fn man_parseln
or
.Fn man_endparse
.\" SUBSECTION
.Ss Variables
The following variables are also defined:
-.Bl -ohang -offset "XXXX"
+.Bl -ohang
.\" LIST-ITEM
.It Va man_macronames
An array of string-ified token names.
.El
.\" SUBSECTION
.Ss Abstract Syntax Tree
-The
+The
.Nm
functions produce an abstract syntax tree (AST) describing input in a
regular form. It may be reviewed at any time with
however, if called before
.Fn man_endparse ,
or after
-.Fn man_endparse
+.Fn man_endparse
or
.Fn man_parseln
-fail, it may be incomplete.
+fail, it may be incomplete.
.\" PARAGRAPH
.Pp
This AST is governed by the ontological
rules dictated in
.Xr man 7
-and derives its terminology accordingly.
+and derives its terminology accordingly.
.\" PARAGRAPH
.Pp
-The AST is composed of
+The AST is composed of
.Vt struct man_node
nodes with 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
+.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"
+.Bl -tag -width "ELEMENTXX" -compact
.\" LIST-ITEM
.It ROOT
\(<- mnode+
.It mnode
-\(<- ELEMENT | TEXT
+\(<- ELEMENT | TEXT | BLOCK
+.It BLOCK
+\(<- HEAD BODY
+.It HEAD
+\(<- mnode*
+.It BODY
+\(<- mnode*
.It ELEMENT
\(<- ELEMENT | TEXT*
.It TEXT
.\" 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
-.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 man *man;
struct man_node *node;
char *buf;
line = 1;
man = man_alloc(NULL, 0, NULL);
+buf = NULL;
+alloc_len = 0;
-while ((buf = fgetln(fp, &len))) {
- buf[len - 1] = '\\0';
- if ( ! man_parseln(man, line, buf))
- errx(1, "man_parseln");
- line++;
+while ((len = getline(&buf, &alloc_len, stdin)) >= 0) {
+ if (len && buflen[len - 1] = '\en')
+ buf[len - 1] = '\e0';
+ if ( ! man_parseln(man, line, buf))
+ errx(1, "man_parseln");
+ line++;
}
+free(buf);
+
if ( ! man_endparse(man))
- errx(1, "man_endparse");
+ errx(1, "man_endparse");
if (NULL == (node = man_node(man)))
- errx(1, "man_node");
+ errx(1, "man_node");
parsed(man, node);
man_free(man);
.Sh AUTHORS
The
.Nm
-utility was written by
-.An Kristaps Dzonsons Aq kristaps@openbsd.org .
+utility was written by
+.An Kristaps Dzonsons Aq kristaps@bsd.lv .
git.ckatri.com / mandoc.git / blobdiff