mandoc.c

   1 /*      $Id: mandoc.c,v 1.1 2009/07/04 09:01:55 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 <assert.h>
  18 #include <ctype.h>
  19 #include <stdlib.h>
  20
  21 #include "libmandoc.h"
  22
  23 int
  24 mandoc_special(const char *p)
  25 {
  26         int              c;
  27
  28         if ('\\' != *p++)
  29                 return(0);
  30
  31         switch (*p) {
  32         case ('\\'):
  33                 /* FALLTHROUGH */
  34         case ('\''):
  35                 /* FALLTHROUGH */
  36         case ('`'):
  37                 /* FALLTHROUGH */
  38         case ('q'):
  39                 /* FALLTHROUGH */
  40         case ('-'):
  41                 /* FALLTHROUGH */
  42         case ('~'):
  43                 /* FALLTHROUGH */
  44         case ('^'):
  45                 /* FALLTHROUGH */
  46         case ('%'):
  47                 /* FALLTHROUGH */
  48         case ('0'):
  49                 /* FALLTHROUGH */
  50         case (' '):
  51                 /* FALLTHROUGH */
  52         case ('|'):
  53                 /* FALLTHROUGH */
  54         case ('&'):
  55                 /* FALLTHROUGH */
  56         case ('.'):
  57                 /* FALLTHROUGH */
  58         case (':'):
  59                 /* FALLTHROUGH */
  60         case ('e'):
  61                 return(2);
  62         case ('f'):
  63                 if (0 == *++p || ! isgraph((u_char)*p))
  64                         return(0);
  65                 return(3);
  66         case ('*'):
  67                 if (0 == *++p || ! isgraph((u_char)*p))
  68                         return(0);
  69                 switch (*p) {
  70                 case ('('):
  71                         if (0 == *++p || ! isgraph((u_char)*p))
  72                                 return(0);
  73                         return(4);
  74                 case ('['):
  75                         for (c = 3, p++; *p && ']' != *p; p++, c++)
  76                                 if ( ! isgraph((u_char)*p))
  77                                         break;
  78                         return(*p == ']' ? c : 0);
  79                 default:
  80                         break;
  81                 }
  82                 return(3);
  83         case ('('):
  84                 if (0 == *++p || ! isgraph((u_char)*p))
  85                         return(0);
  86                 if (0 == *++p || ! isgraph((u_char)*p))
  87                         return(0);
  88                 return(4);
  89         case ('['):
  90                 break;
  91         default:
  92                 return(0);
  93         }
  94
  95         for (c = 3, p++; *p && ']' != *p; p++, c++)
  96                 if ( ! isgraph((u_char)*p))
  97                         break;
  98
  99         return(*p == ']' ? c : 0);
 100 }
 101