-.\" $Id: man.3,v 1.9 2009/09/16 09:41:24 kristaps Exp $
+.\" $Id: man.3,v 1.16 2010/04/13 05:26:49 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: September 16 2009 $
+.Dd $Mdocdate: April 13 2010 $
.Dt MAN 3
.Os
-.\" SECTION
.Sh NAME
+.Nm man ,
.Nm man_alloc ,
.Nm man_parseln ,
.Nm man_endparse ,
.Nm man_free ,
.Nm man_reset
.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"
.Fn man_meta "const struct man *man"
.Ft int
.Fn man_endparse "struct man *man"
-.\" SECTION
.Sh DESCRIPTION
The
-.Nm man
+.Nm
library parses lines of
.Xr man 7
input (and
.Em only
man) into an abstract syntax tree (AST).
-.\" PARAGRAPH
.Pp
In general, applications initiate a parsing sequence with
.Fn man_alloc ,
sequence. See the
.Sx EXAMPLES
section for a full example.
-.\" PARAGRAPH
.Pp
+Beyond the full set of macros defined in
+.Xr man 7 ,
+the
+.Nm
+library also accepts the following macros:
+.Pp
+.Bl -tag -width Ds -compact
+.It am
+.It ami
+.It de
+.It dei
+.It ig
+Instructional macros in the original roff language. Blocks begun by
+these macros end with
+.Sq ..
+and may begin anywhere, although they may not break the next-line
+scoping rules specified in
+.Xr man 7 .
+These blocks are discarded.
+.It PD
+Has no effect. Handled as a current-scope line macro.
+.It Sp
+A synonym for
+.Sq sp 0.5v
+.Pq part of the standard preamble for Perl documentation .
+Handled as a line macro.
+.It UC
+Has no effect. Handled as a current-scope line macro.
+.It Vb
+A synonym for
+.Sq nf
+.Pq part of the standard preamble for Perl documentation .
+Handled as a current-scope line macro.
+.It Ve
+A synonym for
+.Sq fi ,
+closing
+.Sq Vb
+.Pq part of the standard preamble for Perl documentation .
+Handled as a current-scope line macro.
+.El
+.Pp
+Furthermore, the following escapes are accepted to allow
+.Xr pod2man 1
+documents to be correctly formatted:
+\e*(-- (dash),
+\e*(PI (pi),
+\e*(L" (left double-quote),
+\e*(R" (right double-quote),
+\e*(C+ (C++),
+\e*(C` (left single-quote),
+\e*(C' (right single-quote),
+\e*(Aq (apostrophe),
+\e*^ (hat),
+\e*, (comma),
+\e*~ (tilde),
+\e*/ (forward slash),
+\e*: (umlaut),
+\e*8 (beta),
+\e*o (degree),
+\e*(D- (Eth),
+\e*(d- (eth),
+\e*(Th (Thorn),
+and
+\e*(th (thorn).
+.Sh REFERENCE
This section further defines the
.Sx Types ,
.Sx Functions
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 man
An opaque type defined in
.Pa man.c .
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 .
.Sx Abstract Syntax Tree
for details.
.El
-.\" SUBSECTION
.Ss Functions
Function descriptions follow:
-.Bl -ohang -offset "XXXX"
-.\" LIST-ITEM
+.Bl -ohang
.It Fn man_alloc
Allocates a parsing structure. The
.Fa data
.Pa man.h .
Returns NULL on failure. If non-NULL, 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,
.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
.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
.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
.It Fn man_node
Returns the first node of the parse. Note that if
.Fn man_parseln
.Fn man_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 man_macronames
An array of string-ified token names.
.El
-.\" SUBSECTION
.Ss Abstract Syntax Tree
The
.Nm
or
.Fn man_parseln
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.
-.\" PARAGRAPH
.Pp
The AST is composed of
.Vt struct man_node
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 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
.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);
.Ed
-.\" SECTION
.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 .
+.An Kristaps Dzonsons Aq kristaps@bsd.lv .
git.ckatri.com / mandoc.git / blobdiff