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      1 /*	Id: eqn_parse.h,v 1.3 2018/12/14 06:33:14 schwarze Exp  */
      2 /*
      3  * Copyright (c) 2011 Kristaps Dzonsons <kristaps (at) bsd.lv>
      4  * Copyright (c) 2014, 2017, 2018 Ingo Schwarze <schwarze (at) 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 
     22 struct roff_node;
     23 struct eqn_box;
     24 struct eqn_def;
     25 
     26 struct	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 
     42 struct eqn_node	*eqn_alloc(void);
     43 struct eqn_box	*eqn_box_new(void);
     44 void		 eqn_box_free(struct eqn_box *);
     45 void		 eqn_free(struct eqn_node *);
     46 void		 eqn_parse(struct eqn_node *);
     47 void		 eqn_read(struct eqn_node *, const char *);
     48 void		 eqn_reset(struct eqn_node *);
     49