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Revision 1.58, Tue Jun 29 19:20:38 2010 UTC (13 years, 9 months ago) by schwarze
Branch: MAIN
Changes since 1.57: +4 -1 lines

Support for badly nested blocks, written around the time of
the Rostock mandoc hackathon and tested and polished since,
supporting constructs like:

.Ao Bo    Ac    Bc        (exp breaking exp)
.Aq Bo    eol   Bc        (imp breaking exp)
.Ao Bq    Ac    eol       (exp breaking imp)
.Ao Bo So Bc    Ac  Sc    (double break, inner before outer)
.Ao Bo So Ac    Bc  Sc    (double break, outer before inner)
.Ao Bo    Ac So Bc  Sc    (broken breaker)
.Ao Bo So Bc Do Ac  Sc Dc (broken double breaker)

There are still two known issues which are tricky:

1) Breaking two identical explicit blocks (Ao Bo Bo Ac or Aq Bo Bo eol)
fails outright, triggering a bogus syntax error.
2) Breaking a block by two identical explicit blocks (Ao Ao Bo Ac Ac Bc
or Ao Ao Bq Ac Ac eol) still has a minor rendering error left:
"<ao1 <ao2 [bo ac2> ac1> bc]>" should not have the final ">".

We can fix these later in the tree, let's not grow this diff too large.

"get it in" kristaps@

/*	$Id: libmdoc.h,v 1.58 2010/06/29 19:20:38 schwarze Exp $ */
/*
 * Copyright (c) 2008, 2009 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
 * 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.
 */
#ifndef LIBMDOC_H
#define LIBMDOC_H

#include "regs.h"
#include "mdoc.h"

enum	mdoc_next {
	MDOC_NEXT_SIBLING = 0,
	MDOC_NEXT_CHILD
};

struct	mdoc {
	void		 *data; /* private application data */
	mandocmsg	  msg; /* message callback */
	int		  flags;
#define	MDOC_HALT	 (1 << 0) /* error in parse: halt */
#define	MDOC_LITERAL	 (1 << 1) /* in a literal scope */
#define	MDOC_PBODY	 (1 << 2) /* in the document body */
#define	MDOC_NEWLINE	 (1 << 3) /* first macro/text in a line */
#define	MDOC_PHRASELIT	 (1 << 4) /* literal within a partila phrase */
#define	MDOC_PPHRASE	 (1 << 5) /* within a partial phrase */
#define	MDOC_FREECOL	 (1 << 6) /* `It' invocation should close */
	int		  pflags;
	enum mdoc_next	  next; /* where to put the next node */
	struct mdoc_node *last; /* the last node parsed */
	struct mdoc_node *first; /* the first node parsed */
	struct mdoc_meta  meta; /* document meta-data */
	enum mdoc_sec	  lastnamed;
	enum mdoc_sec	  lastsec;
	struct regset	 *regs; /* registers */
};

#define	MACRO_PROT_ARGS	struct mdoc *m, \
			enum mdoct tok, \
			int line, \
			int ppos, \
			int *pos, \
			char *buf

struct	mdoc_macro {
	int		(*fp)(MACRO_PROT_ARGS);
	int		  flags;
#define	MDOC_CALLABLE	 (1 << 0)
#define	MDOC_PARSED	 (1 << 1)
#define	MDOC_EXPLICIT	 (1 << 2)
#define	MDOC_PROLOGUE	 (1 << 3)
#define	MDOC_IGNDELIM	 (1 << 4) 
	/* Reserved words in arguments treated as text. */
};

enum	margserr {
	ARGS_ERROR,
	ARGS_EOLN,
	ARGS_WORD,
	ARGS_PUNCT,
	ARGS_QWORD,
	ARGS_PHRASE,
	ARGS_PPHRASE,
	ARGS_PEND
};

enum	margverr {
	ARGV_ERROR,
	ARGV_EOLN,
	ARGV_ARG,
	ARGV_WORD
};

enum	mdelim {
	DELIM_NONE = 0,
	DELIM_OPEN,
	DELIM_MIDDLE,
	DELIM_CLOSE
};

extern	const struct mdoc_macro *const mdoc_macros;

__BEGIN_DECLS

#define		  mdoc_pmsg(m, l, p, t) \
		  (*(m)->msg)((t), (m)->data, (l), (p), NULL)
#define		  mdoc_nmsg(m, n, t) \
		  (*(m)->msg)((t), (m)->data, (n)->line, (n)->pos, NULL)
int		  mdoc_vmsg(struct mdoc *, enum mandocerr, 
			int, int, const char *, ...);
int		  mdoc_macro(MACRO_PROT_ARGS);
int		  mdoc_word_alloc(struct mdoc *, 
			int, int, const char *);
int		  mdoc_elem_alloc(struct mdoc *, int, int, 
			enum mdoct, struct mdoc_arg *);
int		  mdoc_block_alloc(struct mdoc *, int, int, 
			enum mdoct, struct mdoc_arg *);
int		  mdoc_head_alloc(struct mdoc *, int, int, enum mdoct);
int		  mdoc_tail_alloc(struct mdoc *, int, int, enum mdoct);
int		  mdoc_body_alloc(struct mdoc *, int, int, enum mdoct);
int		  mdoc_endbody_alloc(struct mdoc *m, int line, int pos,
			enum mdoct tok, struct mdoc_node *body,
			enum mdoc_endbody end);
void		  mdoc_node_delete(struct mdoc *, struct mdoc_node *);
void		  mdoc_hash_init(void);
enum mdoct	  mdoc_hash_find(const char *);
enum mdelim	  mdoc_iscdelim(char);
enum mdelim	  mdoc_isdelim(const char *);
size_t		  mdoc_isescape(const char *);
enum	mdoc_sec  mdoc_str2sec(const char *);
time_t		  mdoc_atotime(const char *);
size_t		  mdoc_macro2len(enum mdoct);
const char	 *mdoc_a2att(const char *);
const char	 *mdoc_a2lib(const char *);
const char	 *mdoc_a2st(const char *);
const char	 *mdoc_a2arch(const char *);
const char	 *mdoc_a2vol(const char *);
const char	 *mdoc_a2msec(const char *);
int		  mdoc_valid_pre(struct mdoc *, struct mdoc_node *);
int		  mdoc_valid_post(struct mdoc *);
int		  mdoc_action_pre(struct mdoc *, 
			struct mdoc_node *);
int		  mdoc_action_post(struct mdoc *);
enum margverr	  mdoc_argv(struct mdoc *, int, enum mdoct,
			struct mdoc_arg **, int *, char *);
void		  mdoc_argv_free(struct mdoc_arg *);
void		  mdoc_argn_free(struct mdoc_arg *, int);
enum margserr	  mdoc_args(struct mdoc *, int,
			int *, char *, enum mdoct, char **);
enum margserr	  mdoc_zargs(struct mdoc *, int, 
			int *, char *, int, char **);
#define	ARGS_DELIM	(1 << 1)
#define	ARGS_TABSEP	(1 << 2)
#define	ARGS_NOWARN	(1 << 3)

int		  mdoc_macroend(struct mdoc *);

__END_DECLS

#endif /*!LIBMDOC_H*/