lib/process_escape_sequence.c

   1 /*
   2  * process_esacpe_sequence.c
   3  *
   4  * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2
  11  * as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22 #include <common.h>
  23 #include <fs.h>
  24
  25 int process_escape_sequence(const char *source, char *dest, int destlen)
  26 {
  27         int i = 0;
  28
  29         while (*source) {
  30                 if (*source == '\\') {
  31                         switch (*(source + 1)) {
  32                         case 0:
  33                                 return 0;
  34                         case '\\':
  35                                 dest[i++] = '\\';
  36                                 break;
  37                         case 'a':
  38                                 dest[i++] = '\a';
  39                                 break;
  40                         case 'b':
  41                                 dest[i++] = '\b';
  42                                 break;
  43                         case 'n':
  44                                 dest[i++] = '\n';
  45                                 break;
  46                         case 'r':
  47                                 dest[i++] = '\r';
  48                                 break;
  49                         case 't':
  50                                 dest[i++] = '\t';
  51                                 break;
  52                         case 'f':
  53                                 dest[i++] = '\f';
  54                                 break;
  55                         case 'e':
  56                                 dest[i++] = 0x1b;
  57                                 break;
  58                         case 'h':
  59                                 i += snprintf(dest + i, destlen - i, "%s", CONFIG_BOARDINFO);
  60                                 break;
  61                         case 'w':
  62                                 i += snprintf(dest + i, destlen - i, "%s", getcwd());
  63                                 break;
  64                         default:
  65                                 dest[i++] = '\\';
  66                                 dest[i++] = *(source + 1);
  67                         }
  68                         source++;
  69                 } else
  70                         dest[i++] = *source;
  71                 source++;
  72                 if (!(destlen - i))
  73                         break;
  74         }
  75         dest[i] = 0;
  76         return 0;
  77 }
  78