source/include/charset.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    charset defines
   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 2 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, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 /* this defines the charset types used in samba */
  23 typedef enum {CH_UCS2=0, CH_UTF16=0, CH_UNIX=1, CH_DISPLAY=2, CH_DOS=3, CH_UTF8=4} charset_t;
  24
  25 /* FIXME!!!  Hack job for now to get the lsa ndr code compiling */
  26 #ifndef strlen_m
  27 #define strlen_m strlen
  28 #endif
  29
  30
  31 #define NUM_CHARSETS 5
  32
  33 /*
  34  *   for each charset we have a function that pushes from that charset to a ucs2
  35  *   buffer, and a function that pulls from ucs2 buffer to that  charset.
  36  *     */
  37
  38 struct charset_functions {
  39         const char *name;
  40         size_t (*pull)(void *, const char **inbuf, size_t *inbytesleft,
  41                                    char **outbuf, size_t *outbytesleft);
  42         size_t (*push)(void *, const char **inbuf, size_t *inbytesleft,
  43                                    char **outbuf, size_t *outbytesleft);
  44         struct charset_functions *prev, *next;
  45 };
  46
  47 /*
  48  * This is auxiliary struct used by source/script/gen-8-bit-gap.sh script
  49  * during generation of an encoding table for charset module
  50  *     */
  51
  52 struct charset_gap_table {
  53   uint16 start;
  54   uint16 end;
  55   int32 idx;
  56 };
  57
  58 /*
  59  *   Define stub for charset module which implements 8-bit encoding with gaps.
  60  *   Encoding tables for such module should be produced from glibc's CHARMAPs
  61  *   using script source/script/gen-8bit-gap.sh
  62  *   CHARSETNAME is CAPITALIZED charset name
  63  *
  64  *     */
  65 #define SMB_GENERATE_CHARSET_MODULE_8_BIT_GAP(CHARSETNAME)                                      \
  66 static size_t CHARSETNAME ## _push(void *cd, const char **inbuf, size_t *inbytesleft,                   \
  67                          char **outbuf, size_t *outbytesleft)                                   \
  68 {                                                                                               \
  69         while (*inbytesleft >= 2 && *outbytesleft >= 1) {                                       \
  70                 int i;                                                                          \
  71                 int done = 0;                                                                   \
  72                                                                                                 \
  73                 uint16 ch = SVAL(*inbuf,0);                                                     \
  74                                                                                                 \
  75                 for (i=0; from_idx[i].start != 0xffff; i++) {                                   \
  76                         if ((from_idx[i].start <= ch) && (from_idx[i].end >= ch)) {             \
  77                                 ((unsigned char*)(*outbuf))[0] = from_ucs2[from_idx[i].idx+ch]; \
  78                                 (*inbytesleft) -= 2;                                            \
  79                                 (*outbytesleft) -= 1;                                           \
  80                                 (*inbuf)  += 2;                                                 \
  81                                 (*outbuf) += 1;                                                 \
  82                                 done = 1;                                                       \
  83                                 break;                                                          \
  84                         }                                                                       \
  85                 }                                                                               \
  86                 if (!done) {                                                                    \
  87                         errno = EINVAL;                                                         \
  88                         return -1;                                                              \
  89                 }                                                                               \
  90                                                                                                 \
  91         }                                                                                       \
  92                                                                                                 \
  93         if (*inbytesleft == 1) {                                                                \
  94                 errno = EINVAL;                                                                 \
  95                 return -1;                                                                      \
  96         }                                                                                       \
  97                                                                                                 \
  98         if (*inbytesleft > 1) {                                                                 \
  99                 errno = E2BIG;                                                                  \
 100                 return -1;                                                                      \
 101         }                                                                                       \
 102                                                                                                 \
 103         return 0;                                                                               \
 104 }                                                                                               \
 105                                                                                                 \
 106 static size_t CHARSETNAME ## _pull(void *cd, const char **inbuf, size_t *inbytesleft,                           \
 107                          char **outbuf, size_t *outbytesleft)                                   \
 108 {                                                                                               \
 109         while (*inbytesleft >= 1 && *outbytesleft >= 2) {                                       \
 110                 *(uint16*)(*outbuf) = to_ucs2[((unsigned char*)(*inbuf))[0]];                   \
 111                 (*inbytesleft)  -= 1;                                                           \
 112                 (*outbytesleft) -= 2;                                                           \
 113                 (*inbuf)  += 1;                                                                 \
 114                 (*outbuf) += 2;                                                                 \
 115         }                                                                                       \
 116                                                                                                 \
 117         if (*inbytesleft > 0) {                                                                 \
 118                 errno = E2BIG;                                                                  \
 119                 return -1;                                                                      \
 120         }                                                                                       \
 121                                                                                                 \
 122         return 0;                                                                               \
 123 }                                                                                               \
 124                                                                                                 \
 125 struct charset_functions CHARSETNAME ## _functions =                                            \
 126                 {#CHARSETNAME, CHARSETNAME ## _pull, CHARSETNAME ## _push};                     \
 127                                                                                                 \
 128 NTSTATUS charset_ ## CHARSETNAME ## _init(void)                                                 \
 129 {                                                                                               \
 130         return smb_register_charset(& CHARSETNAME ## _functions);                               \
 131 }                                                                                               \
 132