1/*	$Id: eqn_parse.h,v 1.3 2018/12/14 06:33:14 schwarze Exp $ */
2/*
3 * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2014, 2017, 2018 Ingo Schwarze <schwarze@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 *
18 * External interface of the eqn(7) parser.
19 * For use in the roff(7) and eqn(7) parsers only.
20 */
21
22struct roff_node;
23struct eqn_box;
24struct eqn_def;
25
26struct	eqn_node {
27	struct roff_node *node;    /* Syntax tree of this equation. */
28	struct eqn_def	 *defs;    /* Array of definitions. */
29	char		 *data;    /* Source code of this equation. */
30	char		 *start;   /* First byte of the current token. */
31	char		 *end;	   /* First byte of the next token. */
32	size_t		  defsz;   /* Number of definitions. */
33	size_t		  sz;      /* Length of the source code. */
34	size_t		  toksz;   /* Length of the current token. */
35	int		  gsize;   /* Default point size. */
36	int		  delim;   /* In-line delimiters enabled. */
37	char		  odelim;  /* In-line opening delimiter. */
38	char		  cdelim;  /* In-line closing delimiter. */
39};
40
41
42struct eqn_node	*eqn_alloc(void);
43struct eqn_box	*eqn_box_new(void);
44void		 eqn_box_free(struct eqn_box *);
45void		 eqn_free(struct eqn_node *);
46void		 eqn_parse(struct eqn_node *);
47void		 eqn_read(struct eqn_node *, const char *);
48void		 eqn_reset(struct eqn_node *);
49