external/bsd/mdocml/dist/man_validate.c

   1 /*      $Vendor-Id: man_validate.c,v 1.27 2009/11/02 06:22:45 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
   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 <ctype.h>
  21 #include <errno.h>
  22 #include <limits.h>
  23 #include <stdarg.h>
  24 #include <stdlib.h>
  25
  26 #include "libman.h"
  27 #include "libmandoc.h"
  28
  29 #define CHKARGS   struct man *m, const struct man_node *n
  30
  31 typedef int     (*v_check)(CHKARGS);
  32
  33 struct  man_valid {
  34         v_check  *pres;
  35         v_check  *posts;
  36 };
  37
  38 static  int       check_bline(CHKARGS);
  39 static  int       check_eq0(CHKARGS);
  40 static  int       check_le1(CHKARGS);
  41 static  int       check_ge2(CHKARGS);
  42 static  int       check_le5(CHKARGS);
  43 static  int       check_par(CHKARGS);
  44 static  int       check_part(CHKARGS);
  45 static  int       check_root(CHKARGS);
  46 static  int       check_sec(CHKARGS);
  47 static  int       check_text(CHKARGS);
  48
  49 static  v_check   posts_eq0[] = { check_eq0, NULL };
  50 static  v_check   posts_ge2_le5[] = { check_ge2, check_le5, NULL };
  51 static  v_check   posts_par[] = { check_par, NULL };
  52 static  v_check   posts_part[] = { check_part, NULL };
  53 static  v_check   posts_sec[] = { check_sec, NULL };
  54 static  v_check   posts_sp[] = { check_le1, NULL };
  55 static  v_check   pres_bline[] = { check_bline, NULL };
  56
  57 static  const struct man_valid man_valids[MAN_MAX] = {
  58         { pres_bline, posts_eq0 }, /* br */
  59         { pres_bline, posts_ge2_le5 }, /* TH */ /* FIXME: make sure capitalised. */
  60         { pres_bline, posts_sec }, /* SH */
  61         { pres_bline, posts_sec }, /* SS */
  62         { pres_bline, posts_par }, /* TP */
  63         { pres_bline, posts_par }, /* LP */
  64         { pres_bline, posts_par }, /* PP */
  65         { pres_bline, posts_par }, /* P */
  66         { pres_bline, posts_par }, /* IP */
  67         { pres_bline, posts_par }, /* HP */
  68         { NULL, NULL }, /* SM */
  69         { NULL, NULL }, /* SB */
  70         { NULL, NULL }, /* BI */
  71         { NULL, NULL }, /* IB */
  72         { NULL, NULL }, /* BR */
  73         { NULL, NULL }, /* RB */
  74         { NULL, NULL }, /* R */
  75         { NULL, NULL }, /* B */
  76         { NULL, NULL }, /* I */
  77         { NULL, NULL }, /* IR */
  78         { NULL, NULL }, /* RI */
  79         { pres_bline, posts_eq0 }, /* na */
  80         { NULL, NULL }, /* i */
  81         { pres_bline, posts_sp }, /* sp */
  82         { pres_bline, posts_eq0 }, /* nf */
  83         { pres_bline, posts_eq0 }, /* fi */
  84         { NULL, NULL }, /* r */
  85         { NULL, NULL }, /* RE */
  86         { NULL, posts_part }, /* RS */
  87         { NULL, NULL }, /* DT */
  88         { NULL, NULL }, /* UC */
  89         { NULL, NULL }, /* PD */
  90 };
  91
  92
  93 int
  94 man_valid_pre(struct man *m, const struct man_node *n)
  95 {
  96         v_check         *cp;
  97
  98         if (MAN_TEXT == n->type)
  99                 return(1);
 100         if (MAN_ROOT == n->type)
 101                 return(1);
 102
 103         if (NULL == (cp = man_valids[n->tok].pres))
 104                 return(1);
 105         for ( ; *cp; cp++)
 106                 if ( ! (*cp)(m, n))
 107                         return(0);
 108         return(1);
 109 }
 110
 111
 112 int
 113 man_valid_post(struct man *m)
 114 {
 115         v_check         *cp;
 116
 117         if (MAN_VALID & m->last->flags)
 118                 return(1);
 119         m->last->flags |= MAN_VALID;
 120
 121         switch (m->last->type) {
 122         case (MAN_TEXT):
 123                 return(check_text(m, m->last));
 124         case (MAN_ROOT):
 125                 return(check_root(m, m->last));
 126         default:
 127                 break;
 128         }
 129
 130         if (NULL == (cp = man_valids[m->last->tok].posts))
 131                 return(1);
 132         for ( ; *cp; cp++)
 133                 if ( ! (*cp)(m, m->last))
 134                         return(0);
 135
 136         return(1);
 137 }
 138
 139
 140 static int
 141 check_root(CHKARGS)
 142 {
 143
 144         if (MAN_BLINE & m->flags)
 145                 return(man_nwarn(m, n, WEXITSCOPE));
 146         if (MAN_ELINE & m->flags)
 147                 return(man_nwarn(m, n, WEXITSCOPE));
 148
 149         m->flags &= ~MAN_BLINE;
 150         m->flags &= ~MAN_ELINE;
 151
 152         if (NULL == m->first->child)
 153                 return(man_nerr(m, n, WNODATA));
 154         if (NULL == m->meta.title)
 155                 return(man_nerr(m, n, WNOTITLE));
 156
 157         return(1);
 158 }
 159
 160
 161 static int
 162 check_text(CHKARGS)
 163 {
 164         const char      *p;
 165         int              pos, c;
 166
 167         assert(n->string);
 168
 169         for (p = n->string, pos = n->pos + 1; *p; p++, pos++) {
 170                 if ('\\' == *p) {
 171                         c = mandoc_special(p);
 172                         if (c) {
 173                                 p += c - 1;
 174                                 pos += c - 1;
 175                                 continue;
 176                         }
 177                         if ( ! (MAN_IGN_ESCAPE & m->pflags))
 178                                 return(man_perr(m, n->line, pos, WESCAPE));
 179                         if ( ! man_pwarn(m, n->line, pos, WESCAPE))
 180                                 return(0);
 181                         continue;
 182                 }
 183
 184                 if ('\t' == *p || isprint((u_char)*p))
 185                         continue;
 186
 187                 if (MAN_IGN_CHARS & m->pflags)
 188                         return(man_pwarn(m, n->line, pos, WNPRINT));
 189                 return(man_perr(m, n->line, pos, WNPRINT));
 190         }
 191
 192         return(1);
 193 }
 194
 195
 196 #define INEQ_DEFINE(x, ineq, name) \
 197 static int \
 198 check_##name(CHKARGS) \
 199 { \
 200         if (n->nchild ineq (x)) \
 201                 return(1); \
 202         return(man_verr(m, n->line, n->pos, \
 203                         "expected line arguments %s %d, have %d", \
 204                         #ineq, (x), n->nchild)); \
 205 }
 206
 207 INEQ_DEFINE(0, ==, eq0)
 208 INEQ_DEFINE(1, <=, le1)
 209 INEQ_DEFINE(2, >=, ge2)
 210 INEQ_DEFINE(5, <=, le5)
 211
 212
 213 static int
 214 check_sec(CHKARGS)
 215 {
 216
 217         if (MAN_BODY == n->type && 0 == n->nchild)
 218                 return(man_nwarn(m, n, WBODYARGS));
 219         if (MAN_HEAD == n->type && 0 == n->nchild)
 220                 return(man_nerr(m, n, WHEADARGS));
 221         return(1);
 222 }
 223
 224
 225 static int
 226 check_part(CHKARGS)
 227 {
 228
 229         if (MAN_BODY == n->type && 0 == n->nchild)
 230                 return(man_nwarn(m, n, WBODYARGS));
 231         return(1);
 232 }
 233
 234
 235 static int
 236 check_par(CHKARGS)
 237 {
 238
 239         if (MAN_BODY == n->type)
 240                 switch (n->tok) {
 241                 case (MAN_IP):
 242                         /* FALLTHROUGH */
 243                 case (MAN_HP):
 244                         /* FALLTHROUGH */
 245                 case (MAN_TP):
 246                         /* Body-less lists are ok. */
 247                         break;
 248                 default:
 249                         if (n->nchild)
 250                                 break;
 251                         return(man_nwarn(m, n, WBODYARGS));
 252                 }
 253         if (MAN_HEAD == n->type)
 254                 switch (n->tok) {
 255                 case (MAN_PP):
 256                         /* FALLTHROUGH */
 257                 case (MAN_P):
 258                         /* FALLTHROUGH */
 259                 case (MAN_LP):
 260                         if (0 == n->nchild)
 261                                 break;
 262                         return(man_nwarn(m, n, WNHEADARGS));
 263                 default:
 264                         if (n->nchild)
 265                                 break;
 266                         return(man_nwarn(m, n, WHEADARGS));
 267                 }
 268
 269         return(1);
 270 }
 271
 272
 273 static int
 274 check_bline(CHKARGS)
 275 {
 276
 277         assert( ! (MAN_ELINE & m->flags));
 278         if (MAN_BLINE & m->flags)
 279                 return(man_nerr(m, n, WLNSCOPE));
 280         return(1);
 281 }
 282