src/mfmt.c

   1 /* mfmt: sets bold and underline for mail files
   2    (c) 1995 miguel de icaza
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  */
  18
  19 /** \file mfmt.c
  20  *  \brief Source: sets bold and underline for mail files
  21  */
  22
  23 #include <stdio.h>
  24
  25 enum states {
  26     header,
  27     definition,
  28     plain,
  29     newline,
  30     seen_f,
  31     seen_r,
  32     seen_o,
  33     header_new,
  34     seen_m
  35 };
  36
  37 int
  38 main (void)
  39 {
  40     int c;
  41     int state = newline;
  42     int space_seen = 0;
  43
  44     while ((c = getchar ()) != EOF){
  45         switch (state){
  46         case plain:
  47             if (c == '\n')
  48                 state = newline;
  49             putchar (c);
  50             break;
  51
  52         case newline:
  53             if (c == 'F')
  54                 state = seen_f;
  55             else if (c == '\n')
  56                 putchar ('\n');
  57             else {
  58                 state = plain;
  59                 putchar (c);
  60             }
  61             break;
  62
  63         case seen_f:
  64             if (c == 'r')
  65                 state = seen_r;
  66             else {
  67                 printf ("F%c", c);
  68                 state = plain;
  69             }
  70             break;
  71
  72         case seen_r:
  73             if (c == 'o')
  74                 state = seen_o;
  75             else {
  76                 state = plain;
  77                 printf ("Fr%c", c);
  78             }
  79             break;
  80
  81         case seen_o:
  82             if (c == 'm'){
  83                 state = seen_m;
  84             } else {
  85                 state = plain;
  86                 printf ("Fro%c", c);
  87             }
  88             break;
  89
  90         case seen_m:
  91             if (c == ' '){
  92                 state = definition;
  93                 printf ("_\bF_\br_\bo_\bm ");
  94             } else {
  95                 state = plain;
  96                 printf ("From%c", c);
  97             }
  98             break;
  99
 100         case header_new:
 101             space_seen = 0;
 102             if (c == ' ' || c == '\t') {
 103                 state = definition;
 104                 putchar (c);
 105                 break;
 106             }
 107             if (c == '\n'){
 108                 state = plain;
 109                 putchar (c);
 110                 break;
 111             }
 112
 113         case header:
 114             if (c == '\n'){
 115                 putchar (c);
 116                 state = header_new;
 117                 break;
 118             }
 119             printf ("_\b%c", c);
 120             if (c == ' ')
 121                 space_seen = 1;
 122             if (c == ':' && !space_seen)
 123                 state = definition;
 124             break;
 125
 126         case definition:
 127             if (c == '\n'){
 128                 putchar (c);
 129                 state = header_new;
 130                 break;
 131             }
 132             printf ("%c\b%c", c, c);
 133             break;
 134         }
 135     }
 136     return (0);
 137 }