source3/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 #if 0
  26 /* FIXME!!!  Hack job for now to get the lsa ndr code compiling */
  27 #ifndef strlen_m
  28 #define strlen_m strlen
  29 #endif
  30 #ifndef strlen_m_term
  31 #define strlen_m_term strlen
  32 #endif
  33 #endif
  34
  35 #define NUM_CHARSETS 5
  36
  37 /*
  38  *   for each charset we have a function that pushes from that charset to a ucs2
  39  *   buffer, and a function that pulls from ucs2 buffer to that  charset.
  40  *     */
  41
  42 struct charset_functions {
  43         const char *name;
  44         size_t (*pull)(void *, const char **inbuf, size_t *inbytesleft,
  45                                    char **outbuf, size_t *outbytesleft);
  46         size_t (*push)(void *, const char **inbuf, size_t *inbytesleft,
  47                                    char **outbuf, size_t *outbytesleft);
  48         struct charset_functions *prev, *next;
  49 };
  50
  51 /*
  52  * This is auxiliary struct used by source/script/gen-8-bit-gap.sh script
  53  * during generation of an encoding table for charset module
  54  *     */
  55
  56 struct charset_gap_table {
  57   uint16 start;
  58   uint16 end;
  59   int32 idx;
  60 };
  61
  62 /*
  63  *   Define stub for charset module which implements 8-bit encoding with gaps.
  64  *   Encoding tables for such module should be produced from glibc's CHARMAPs
  65  *   using script source/script/gen-8bit-gap.sh
  66  *   CHARSETNAME is CAPITALIZED charset name
  67  *
  68  *     */
  69 #define SMB_GENERATE_CHARSET_MODULE_8_BIT_GAP(CHARSETNAME)                                      \
  70 static size_t CHARSETNAME ## _push(void *cd, const char **inbuf, size_t *inbytesleft,                   \
  71                          char **outbuf, size_t *outbytesleft)                                   \
  72 {                                                                                               \
  73         while (*inbytesleft >= 2 && *outbytesleft >= 1) {                                       \
  74                 int i;                                                                          \
  75                 int done = 0;                                                                   \
  76                                                                                                 \
  77                 uint16 ch = SVAL(*inbuf,0);                                                     \
  78                                                                                                 \
  79                 for (i=0; from_idx[i].start != 0xffff; i++) {                                   \
  80                         if ((from_idx[i].start <= ch) && (from_idx[i].end >= ch)) {             \
  81                                 ((unsigned char*)(*outbuf))[0] = from_ucs2[from_idx[i].idx+ch]; \
  82                                 (*inbytesleft) -= 2;                                            \
  83                                 (*outbytesleft) -= 1;                                           \
  84                                 (*inbuf)  += 2;                                                 \
  85                                 (*outbuf) += 1;                                                 \
  86                                 done = 1;                                                       \
  87                                 break;                                                          \
  88                         }                                                                       \
  89                 }                                                                               \
  90                 if (!done) {                                                                    \
  91                         errno = EINVAL;                                                         \
  92                         return -1;                                                              \
  93                 }                                                                               \
  94                                                                                                 \
  95         }                                                                                       \
  96                                                                                                 \
  97         if (*inbytesleft == 1) {                                                                \
  98                 errno = EINVAL;                                                                 \
  99                 return -1;                                                                      \
 100         }                                                                                       \
 101                                                                                                 \
 102         if (*inbytesleft > 1) {                                                                 \
 103                 errno = E2BIG;                                                                  \
 104                 return -1;                                                                      \
 105         }                                                                                       \
 106                                                                                                 \
 107         return 0;                                                                               \
 108 }                                                                                               \
 109                                                                                                 \
 110 static size_t CHARSETNAME ## _pull(void *cd, const char **inbuf, size_t *inbytesleft,                           \
 111                          char **outbuf, size_t *outbytesleft)                                   \
 112 {                                                                                               \
 113         while (*inbytesleft >= 1 && *outbytesleft >= 2) {                                       \
 114                 *(uint16*)(*outbuf) = to_ucs2[((unsigned char*)(*inbuf))[0]];                   \
 115                 (*inbytesleft)  -= 1;                                                           \
 116                 (*outbytesleft) -= 2;                                                           \
 117                 (*inbuf)  += 1;                                                                 \
 118                 (*outbuf) += 2;                                                                 \
 119         }                                                                                       \
 120                                                                                                 \
 121         if (*inbytesleft > 0) {                                                                 \
 122                 errno = E2BIG;                                                                  \
 123                 return -1;                                                                      \
 124         }                                                                                       \
 125                                                                                                 \
 126         return 0;                                                                               \
 127 }                                                                                               \
 128                                                                                                 \
 129 struct charset_functions CHARSETNAME ## _functions =                                            \
 130                 {#CHARSETNAME, CHARSETNAME ## _pull, CHARSETNAME ## _push};                     \
 131                                                                                                 \
 132 NTSTATUS charset_ ## CHARSETNAME ## _init(void)                                                 \
 133 {                                                                                               \
 134         return smb_register_charset(& CHARSETNAME ## _functions);                               \
 135 }                                                                                               \
 136