usr.bin/mandoc/mandoc.c

   1 /*      $Id: mandoc.c,v 1.3 2009/08/22 15:18:11 schwarze 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 <stdlib.h>
  22
  23 #include "libmandoc.h"
  24
  25 int
  26 mandoc_special(const char *p)
  27 {
  28         int              c;
  29
  30         if ('\\' != *p++)
  31                 return(0);
  32
  33         switch (*p) {
  34         case ('\\'):
  35                 /* FALLTHROUGH */
  36         case ('\''):
  37                 /* FALLTHROUGH */
  38         case ('`'):
  39                 /* FALLTHROUGH */
  40         case ('q'):
  41                 /* FALLTHROUGH */
  42         case ('-'):
  43                 /* FALLTHROUGH */
  44         case ('~'):
  45                 /* FALLTHROUGH */
  46         case ('^'):
  47                 /* FALLTHROUGH */
  48         case ('%'):
  49                 /* FALLTHROUGH */
  50         case ('0'):
  51                 /* FALLTHROUGH */
  52         case (' '):
  53                 /* FALLTHROUGH */
  54         case ('|'):
  55                 /* FALLTHROUGH */
  56         case ('&'):
  57                 /* FALLTHROUGH */
  58         case ('.'):
  59                 /* FALLTHROUGH */
  60         case (':'):
  61                 /* FALLTHROUGH */
  62         case ('c'):
  63                 return(2);
  64         case ('e'):
  65                 return(2);
  66         case ('f'):
  67                 if (0 == *++p || ! isgraph((u_char)*p))
  68                         return(0);
  69                 return(3);
  70         case ('*'):
  71                 if (0 == *++p || ! isgraph((u_char)*p))
  72                         return(0);
  73                 switch (*p) {
  74                 case ('('):
  75                         if (0 == *++p || ! isgraph((u_char)*p))
  76                                 return(0);
  77                         return(4);
  78                 case ('['):
  79                         for (c = 3, p++; *p && ']' != *p; p++, c++)
  80                                 if ( ! isgraph((u_char)*p))
  81                                         break;
  82                         return(*p == ']' ? c : 0);
  83                 default:
  84                         break;
  85                 }
  86                 return(3);
  87         case ('('):
  88                 if (0 == *++p || ! isgraph((u_char)*p))
  89                         return(0);
  90                 if (0 == *++p || ! isgraph((u_char)*p))
  91                         return(0);
  92                 return(4);
  93         case ('['):
  94                 break;
  95         default:
  96                 return(0);
  97         }
  98
  99         for (c = 3, p++; *p && ']' != *p; p++, c++)
 100                 if ( ! isgraph((u_char)*p))
 101                         break;
 102
 103         return(*p == ']' ? c : 0);
 104 }