-.\" $Id: man.3,v 1.6 2009/07/05 19:30:49 kristaps Exp $
+.\" $Id: man.3,v 1.29 2011/01/03 11:31:26 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 5 2009 $
+.Dd $Mdocdate: January 3 2011 $
.Dt MAN 3
.Os
-.\" SECTION
.Sh NAME
+.Nm man ,
.Nm man_alloc ,
-.Nm man_parseln ,
.Nm man_endparse ,
-.Nm man_node ,
-.Nm man_meta ,
.Nm man_free ,
+.Nm man_meta ,
+.Nm man_node ,
+.Nm man_parseln ,
.Nm man_reset
.Nd man macro compiler library
-.\" SECTION
.Sh SYNOPSIS
-.Fd #include <man.h>
+.In mandoc.h
+.In man.h
.Vt extern const char * const * man_macronames;
+.Ft int
+.Fo man_addspan
+.Fa "struct man *man"
+.Fa "const struct tbl_span *span"
+.Fc
.Ft "struct man *"
-.Fn man_alloc "void *data" "int pflags" "const struct man_cb *cb"
-.Ft void
-.Fn man_reset "struct man *man"
+.Fo man_alloc
+.Fa "struct regset *regs"
+.Fa "void *data"
+.Fa "mandocmsg msgs"
+.Fc
+.Ft int
+.Fn man_endparse "struct man *man"
.Ft void
.Fn man_free "struct man *man"
-.Ft int
-.Fn man_parseln "struct man *man" "int line" "char *buf"
-.Ft "const struct man_node *"
-.Fn man_node "const struct man *man"
.Ft "const struct man_meta *"
.Fn man_meta "const struct man *man"
+.Ft "const struct man_node *"
+.Fn man_node "const struct man *man"
.Ft int
-.Fn man_endparse "struct man *man"
-.\" SECTION
+.Fo man_parseln
+.Fa "struct man *man"
+.Fa "int line"
+.Fa "char *buf"
+.Fc
+.Ft void
+.Fn man_reset "struct man *man"
.Sh DESCRIPTION
The
-.Nm man
-library parses lines of
+.Nm
+library parses lines of
.Xr man 7
-input (and
-.Em only
-man) into an abstract syntax tree (AST).
-.\" PARAGRAPH
+input into an abstract syntax tree (AST).
.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
The
.Fn man_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
+sequence.
.Pp
-This section further defines the
-.Sx Types ,
-.Sx Functions
-and
-.Sx Variables
-available to programmers. Following that, the
-.Sx Abstract Syntax Tree
-section documents the output tree.
-.\" SUBSECTION
+Beyond the full set of macros defined in
+.Xr man 7 ,
+the
+.Nm
+library also accepts the following macro:
+.Pp
+.Bl -tag -width Ds -compact
+.It PD
+Has no effect.
+Handled as a current-scope line macro.
+.El
.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 man
-An opaque type defined in
-.Pa man.c .
+An opaque type.
Its values are only used privately within the library.
-.\" LIST-ITEM
-.It Vt struct man_cb
-A set of message callbacks defined in
-.Pa man.h .
-.\" LIST-ITEM
.It Vt struct man_node
-A parsed node. Defined in
-.Pa man.h .
-See
+A parsed node.
+See
.Sx Abstract Syntax Tree
for details.
.El
-.\" SUBSECTION
.Ss Functions
-Function descriptions follow:
-.Bl -ohang -offset "XXXX"
-.\" LIST-ITEM
+If
+.Fn man_addspan ,
+.Fn man_parseln ,
+or
+.Fn man_endparse
+return 0, calls to any function but
+.Fn man_reset
+or
+.Fn man_free
+will raise an assertion.
+.Bl -ohang
+.It Fn man_addspan
+Add a table span to the parsing stream.
+Returns 0 on failure, 1 on success.
.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.
+Allocates a parsing structure.
The
-.Fa pflags
-arguments are defined in
-.Pa man.h .
-Returns NULL on failure. If non-NULL, the pointer must be freed with
+.Fa data
+pointer is passed to
+.Fa msgs .
+Always returns a valid pointer.
+The pointer must be freed with
.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
.It Fn man_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 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
+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 man_endparse
-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
+Signals that the parse is complete.
+Returns 0 on failure, 1 on success.
.It Fn man_node
-Returns the first node of the parse. Note that if
-.Fn man_parseln
-or
-.Fn man_endparse
-return 0, the tree will be incomplete.
+Returns the first node of the parse.
.It Fn man_meta
-Returns the document's parsed meta-data. If this information has not
-yet been supplied or
-.Fn man_parseln
-or
-.Fn man_endparse
-return 0, the data will be incomplete.
+Returns the document's parsed meta-data.
.El
-.\" SUBSECTION
.Ss Variables
The following variables are also defined:
-.Bl -ohang -offset "XXXX"
-.\" LIST-ITEM
+.Bl -ohang
.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
+regular form.
+It may be reviewed at any time with
.Fn man_nodes ;
however, if called before
.Fn man_endparse ,
or after
-.Fn man_endparse
+.Fn man_endparse
or
.Fn man_parseln
-fail, it may be incomplete.
-.\" PARAGRAPH
+fail, it may be incomplete.
.Pp
-This AST is governed by the ontological
-rules dictated in
+This AST is governed by the ontological rules dictated in
.Xr man 7
-and derives its terminology accordingly.
-.\" PARAGRAPH
+and derives its terminology accordingly.
.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
+nodes with 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
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"
-.\" LIST-ITEM
+.Bl -tag -width "ELEMENTXX" -compact
.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
\(<- [[:alpha:]]*
.El
-.\" PARAGRAPH
.Pp
The only elements capable of nesting other elements are those with
next-lint scope as documented in
.Xr man 7 .
-.\" 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 regset regs;
struct man *man;
struct man_node *node;
char *buf;
size_t len;
int line;
+bzero(®s, sizeof(struct regset));
line = 1;
-man = man_alloc(NULL, 0, NULL);
+man = man_alloc(®s, NULL, 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);
.Ed
-.\" SECTION
+.Pp
+To compile this, execute
+.Pp
+.Dl % cc main.c libman.a libmandoc.a
+.Pp
+where
+.Pa main.c
+is the example file.
.Sh SEE ALSO
.Xr mandoc 1 ,
.Xr man 7
-.\" SECTION
.Sh AUTHORS
The
.Nm
-utility was written by
-.An Kristaps Dzonsons Aq kristaps@kth.se .
+library was written by
+.An Kristaps Dzonsons Aq kristaps@bsd.lv .
git.ckatri.com / mandoc.git / blobdiff