bin/mandoc/roff_validate.c

   1 /*      $Id: roff_validate.c,v 1.18 2018/12/31 09:02:37 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2010, 2017, 2018 Ingo Schwarze <schwarze@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 <stdio.h>
  21 #include <string.h>
  22
  23 #include "mandoc.h"
  24 #include "roff.h"
  25 #include "libmandoc.h"
  26 #include "roff_int.h"
  27
  28 #define ROFF_VALID_ARGS struct roff_man *man, struct roff_node *n
  29
  30 typedef void    (*roff_valid_fp)(ROFF_VALID_ARGS);
  31
  32 static  void      roff_valid_br(ROFF_VALID_ARGS);
  33 static  void      roff_valid_fi(ROFF_VALID_ARGS);
  34 static  void      roff_valid_ft(ROFF_VALID_ARGS);
  35 static  void      roff_valid_nf(ROFF_VALID_ARGS);
  36 static  void      roff_valid_sp(ROFF_VALID_ARGS);
  37
  38 static  const roff_valid_fp roff_valids[ROFF_MAX] = {
  39         roff_valid_br,  /* br */
  40         NULL,  /* ce */
  41         roff_valid_fi,  /* fi */
  42         roff_valid_ft,  /* ft */
  43         NULL,  /* ll */
  44         NULL,  /* mc */
  45         roff_valid_nf,  /* nf */
  46         NULL,  /* po */
  47         NULL,  /* rj */
  48         roff_valid_sp,  /* sp */
  49         NULL,  /* ta */
  50         NULL,  /* ti */
  51 };
  52
  53
  54 void
  55 roff_validate(struct roff_man *man)
  56 {
  57         struct roff_node        *n;
  58
  59         n = man->last;
  60         assert(n->tok < ROFF_MAX);
  61         if (roff_valids[n->tok] != NULL)
  62                 (*roff_valids[n->tok])(man, n);
  63 }
  64
  65 static void
  66 roff_valid_br(ROFF_VALID_ARGS)
  67 {
  68         struct roff_node        *np;
  69
  70         if (n->next != NULL && n->next->type == ROFFT_TEXT &&
  71             *n->next->string == ' ') {
  72                 mandoc_msg(MANDOCERR_PAR_SKIP, n->line, n->pos,
  73                     "br before text line with leading blank");
  74                 roff_node_delete(man, n);
  75                 return;
  76         }
  77
  78         if ((np = n->prev) == NULL)
  79                 return;
  80
  81         switch (np->tok) {
  82         case ROFF_br:
  83         case ROFF_sp:
  84         case MDOC_Pp:
  85                 mandoc_msg(MANDOCERR_PAR_SKIP,
  86                     n->line, n->pos, "br after %s", roff_name[np->tok]);
  87                 roff_node_delete(man, n);
  88                 break;
  89         default:
  90                 break;
  91         }
  92 }
  93
  94 static void
  95 roff_valid_fi(ROFF_VALID_ARGS)
  96 {
  97         if ((n->flags & NODE_NOFILL) == 0)
  98                 mandoc_msg(MANDOCERR_FI_SKIP, n->line, n->pos, "fi");
  99 }
 100
 101 static void
 102 roff_valid_ft(ROFF_VALID_ARGS)
 103 {
 104         const char              *cp;
 105
 106         if (n->child == NULL) {
 107                 man->next = ROFF_NEXT_CHILD;
 108                 roff_word_alloc(man, n->line, n->pos, "P");
 109                 man->last = n;
 110                 return;
 111         }
 112
 113         cp = n->child->string;
 114         if (mandoc_font(cp, (int)strlen(cp)) != ESCAPE_ERROR)
 115                 return;
 116         mandoc_msg(MANDOCERR_FT_BAD, n->line, n->pos, "ft %s", cp);
 117         roff_node_delete(man, n);
 118 }
 119
 120 static void
 121 roff_valid_nf(ROFF_VALID_ARGS)
 122 {
 123         if (n->flags & NODE_NOFILL)
 124                 mandoc_msg(MANDOCERR_NF_SKIP, n->line, n->pos, "nf");
 125 }
 126
 127 static void
 128 roff_valid_sp(ROFF_VALID_ARGS)
 129 {
 130         struct roff_node        *np;
 131
 132         if ((np = n->prev) == NULL)
 133                 return;
 134
 135         switch (np->tok) {
 136         case ROFF_br:
 137                 mandoc_msg(MANDOCERR_PAR_SKIP,
 138                     np->line, np->pos, "br before sp");
 139                 roff_node_delete(man, np);
 140                 break;
 141         case MDOC_Pp:
 142                 mandoc_msg(MANDOCERR_PAR_SKIP,
 143                     n->line, n->pos, "sp after Pp");
 144                 roff_node_delete(man, n);
 145                 break;
 146         default:
 147                 break;
 148         }
 149 }