lib/util/charset/weird.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba module with developer tools
   4    Copyright (C) Andrew Tridgell 2001
   5    Copyright (C) Jelmer Vernooij 2002
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "charset_proto.h"
  23
  24 #ifdef DEVELOPER
  25
  26 static struct {
  27         char from;
  28         const char *to;
  29         int len;
  30 } weird_table[] = {
  31         {'q', "^q^", 3},
  32         {'Q', "^Q^", 3},
  33         {0, NULL}
  34 };
  35
  36 size_t weird_pull(void *cd, const char **inbuf, size_t *inbytesleft,
  37                   char **outbuf, size_t *outbytesleft)
  38 {
  39         while (*inbytesleft >= 1 && *outbytesleft >= 2) {
  40                 int i;
  41                 int done = 0;
  42                 for (i=0;weird_table[i].from;i++) {
  43                         if (strncmp((*inbuf),
  44                                     weird_table[i].to,
  45                                     weird_table[i].len) == 0) {
  46                                 if (*inbytesleft < weird_table[i].len) {
  47                                         DEBUG(0,("ERROR: truncated weird string\n"));
  48                                         /* smb_panic("weird_pull"); */
  49
  50                                 } else {
  51                                         (*outbuf)[0] = weird_table[i].from;
  52                                         (*outbuf)[1] = 0;
  53                                         (*inbytesleft)  -= weird_table[i].len;
  54                                         (*outbytesleft) -= 2;
  55                                         (*inbuf)  += weird_table[i].len;
  56                                         (*outbuf) += 2;
  57                                         done = 1;
  58                                         break;
  59                                 }
  60                         }
  61                 }
  62                 if (done) continue;
  63                 (*outbuf)[0] = (*inbuf)[0];
  64                 (*outbuf)[1] = 0;
  65                 (*inbytesleft)  -= 1;
  66                 (*outbytesleft) -= 2;
  67                 (*inbuf)  += 1;
  68                 (*outbuf) += 2;
  69         }
  70
  71         if (*inbytesleft > 0) {
  72                 errno = E2BIG;
  73                 return -1;
  74         }
  75
  76         return 0;
  77 }
  78
  79 size_t weird_push(void *cd, const char **inbuf, size_t *inbytesleft,
  80                   char **outbuf, size_t *outbytesleft)
  81 {
  82         int ir_count=0;
  83
  84         while (*inbytesleft >= 2 && *outbytesleft >= 1) {
  85                 int i;
  86                 int done=0;
  87                 for (i=0;weird_table[i].from;i++) {
  88                         if ((*inbuf)[0] == weird_table[i].from &&
  89                             (*inbuf)[1] == 0) {
  90                                 if (*outbytesleft < weird_table[i].len) {
  91                                         DEBUG(0,("No room for weird character\n"));
  92                                         /* smb_panic("weird_push"); */
  93                                 } else {
  94                                         memcpy(*outbuf, weird_table[i].to,
  95                                                weird_table[i].len);
  96                                         (*inbytesleft)  -= 2;
  97                                         (*outbytesleft) -= weird_table[i].len;
  98                                         (*inbuf)  += 2;
  99                                         (*outbuf) += weird_table[i].len;
 100                                         done = 1;
 101                                         break;
 102                                 }
 103                         }
 104                 }
 105                 if (done) continue;
 106
 107                 (*outbuf)[0] = (*inbuf)[0];
 108                 if ((*inbuf)[1]) ir_count++;
 109                 (*inbytesleft)  -= 2;
 110                 (*outbytesleft) -= 1;
 111                 (*inbuf)  += 2;
 112                 (*outbuf) += 1;
 113         }
 114
 115         if (*inbytesleft == 1) {
 116                 errno = EINVAL;
 117                 return -1;
 118         }
 119
 120         if (*inbytesleft > 1) {
 121                 errno = E2BIG;
 122                 return -1;
 123         }
 124
 125         return ir_count;
 126 }
 127
 128 #else
 129 void charset_weird_dummy(void);
 130 void charset_weird_dummy(void)
 131 {
 132         return;
 133 }
 134
 135 #endif