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roff_validate.c revision 1.1.1.1.2.2 
      1 /*	Id: roff_validate.c,v 1.9 2017/06/14 22:51:25 schwarze Exp  */
      2 /*
      3  * Copyright (c) 2010, 2017 Ingo Schwarze <schwarze (at) openbsd.org>
      4  *
      5  * Permission to use, copy, modify, and distribute this software for any
      6  * purpose with or without fee is hereby granted, provided that the above
      7  * copyright notice and this permission notice appear in all copies.
      8  *
      9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     16  */
     17 #include <sys/types.h>
     18 
     19 #include <assert.h>
     20 #include <stddef.h>
     21 
     22 #include "mandoc.h"
     23 #include "roff.h"
     24 #include "libmandoc.h"
     25 #include "roff_int.h"
     26 
     27 #define	ROFF_VALID_ARGS struct roff_man *man, struct roff_node *n
     28 
     29 typedef	void	(*roff_valid_fp)(ROFF_VALID_ARGS);
     30 
     31 static	void	  roff_valid_ft(ROFF_VALID_ARGS);
     32 
     33 static	const roff_valid_fp roff_valids[ROFF_MAX] = {
     34 	NULL,  /* br */
     35 	NULL,  /* ce */
     36 	roff_valid_ft,  /* ft */
     37 	NULL,  /* ll */
     38 	NULL,  /* mc */
     39 	NULL,  /* po */
     40 	NULL,  /* rj */
     41 	NULL,  /* sp */
     42 	NULL,  /* ta */
     43 	NULL,  /* ti */
     44 };
     45 
     46 
     47 void
     48 roff_validate(struct roff_man *man)
     49 {
     50 	struct roff_node	*n;
     51 
     52 	n = man->last;
     53 	assert(n->tok < ROFF_MAX);
     54 	if (roff_valids[n->tok] != NULL)
     55 		(*roff_valids[n->tok])(man, n);
     56 }
     57 
     58 static void
     59 roff_valid_ft(ROFF_VALID_ARGS)
     60 {
     61 	char	*cp;
     62 
     63 	if (n->child == NULL) {
     64 		man->next = ROFF_NEXT_CHILD;
     65 		roff_word_alloc(man, n->line, n->pos, "P");
     66 		man->last = n;
     67 		return;
     68 	}
     69 
     70 	cp = n->child->string;
     71 	switch (*cp) {
     72 	case '1':
     73 	case '2':
     74 	case '3':
     75 	case '4':
     76 	case 'I':
     77 	case 'P':
     78 	case 'R':
     79 		if (cp[1] == '\0')
     80 			return;
     81 		break;
     82 	case 'B':
     83 		if (cp[1] == '\0' || (cp[1] == 'I' && cp[2] == '\0'))
     84 			return;
     85 		break;
     86 	case 'C':
     87 		if (cp[1] == 'W' && cp[2] == '\0')
     88 			return;
     89 		break;
     90 	default:
     91 		break;
     92 	}
     93 
     94 	mandoc_vmsg(MANDOCERR_FT_BAD, man->parse,
     95 	    n->line, n->pos, "ft %s", cp);
     96 	roff_node_delete(man, n);
     97 }
     98