| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 | charset defines
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| 4 | Copyright (C) Andrew Tridgell 2001
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| 5 | Copyright (C) Jelmer Vernooij 2002
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| 6 |
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| 7 | This program is free software; you can redistribute it and/or modify
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| 8 | it under the terms of the GNU General Public License as published by
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| 9 | the Free Software Foundation; either version 2 of the License, or
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| 10 | (at your option) any later version.
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| 11 |
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| 12 | This program is distributed in the hope that it will be useful,
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | GNU General Public License for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License
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| 18 | along with this program; if not, write to the Free Software
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| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 20 | */
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| 21 |
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| 22 | /* this defines the charset types used in samba */
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| 23 | typedef enum {CH_UTF16LE=0, CH_UTF16=0, CH_UNIX=1, CH_DISPLAY=2, CH_DOS=3, CH_UTF8=4, CH_UTF16BE=5} charset_t;
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| 24 |
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| 25 | #define NUM_CHARSETS 6
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| 26 |
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| 27 | /*
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| 28 | * for each charset we have a function that pushes from that charset to a ucs2
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| 29 | * buffer, and a function that pulls from ucs2 buffer to that charset.
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| 30 | * */
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| 31 |
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| 32 | struct charset_functions {
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| 33 | const char *name;
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| 34 | size_t (*pull)(void *, const char **inbuf, size_t *inbytesleft,
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| 35 | char **outbuf, size_t *outbytesleft);
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| 36 | size_t (*push)(void *, const char **inbuf, size_t *inbytesleft,
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| 37 | char **outbuf, size_t *outbytesleft);
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| 38 | struct charset_functions *prev, *next;
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| 39 | };
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| 40 |
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| 41 | /*
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| 42 | * This is auxiliary struct used by source/script/gen-8-bit-gap.sh script
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| 43 | * during generation of an encoding table for charset module
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| 44 | * */
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| 45 |
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| 46 | struct charset_gap_table {
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| 47 | uint16 start;
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| 48 | uint16 end;
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| 49 | int32 idx;
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| 50 | };
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| 51 |
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| 52 | /*
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| 53 | * Define stub for charset module which implements 8-bit encoding with gaps.
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| 54 | * Encoding tables for such module should be produced from glibc's CHARMAPs
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| 55 | * using script source/script/gen-8bit-gap.sh
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| 56 | * CHARSETNAME is CAPITALIZED charset name
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| 57 | *
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| 58 | * */
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| 59 | #define SMB_GENERATE_CHARSET_MODULE_8_BIT_GAP(CHARSETNAME) \
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| 60 | static size_t CHARSETNAME ## _push(void *cd, const char **inbuf, size_t *inbytesleft, \
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| 61 | char **outbuf, size_t *outbytesleft) \
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| 62 | { \
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| 63 | while (*inbytesleft >= 2 && *outbytesleft >= 1) { \
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| 64 | int i; \
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| 65 | int done = 0; \
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| 66 | \
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| 67 | uint16 ch = SVAL(*inbuf,0); \
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| 68 | \
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| 69 | for (i=0; from_idx[i].start != 0xffff; i++) { \
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| 70 | if ((from_idx[i].start <= ch) && (from_idx[i].end >= ch)) { \
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| 71 | ((unsigned char*)(*outbuf))[0] = from_ucs2[from_idx[i].idx+ch]; \
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| 72 | (*inbytesleft) -= 2; \
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| 73 | (*outbytesleft) -= 1; \
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| 74 | (*inbuf) += 2; \
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| 75 | (*outbuf) += 1; \
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| 76 | done = 1; \
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| 77 | break; \
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| 78 | } \
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| 79 | } \
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| 80 | if (!done) { \
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| 81 | errno = EINVAL; \
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| 82 | return -1; \
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| 83 | } \
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| 84 | \
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| 85 | } \
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| 86 | \
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| 87 | if (*inbytesleft == 1) { \
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| 88 | errno = EINVAL; \
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| 89 | return -1; \
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| 90 | } \
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| 91 | \
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| 92 | if (*inbytesleft > 1) { \
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| 93 | errno = E2BIG; \
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| 94 | return -1; \
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| 95 | } \
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| 96 | \
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| 97 | return 0; \
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| 98 | } \
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| 99 | \
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| 100 | static size_t CHARSETNAME ## _pull(void *cd, const char **inbuf, size_t *inbytesleft, \
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| 101 | char **outbuf, size_t *outbytesleft) \
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| 102 | { \
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| 103 | while (*inbytesleft >= 1 && *outbytesleft >= 2) { \
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| 104 | *(uint16*)(*outbuf) = to_ucs2[((unsigned char*)(*inbuf))[0]]; \
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| 105 | (*inbytesleft) -= 1; \
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| 106 | (*outbytesleft) -= 2; \
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| 107 | (*inbuf) += 1; \
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| 108 | (*outbuf) += 2; \
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| 109 | } \
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| 110 | \
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| 111 | if (*inbytesleft > 0) { \
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| 112 | errno = E2BIG; \
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| 113 | return -1; \
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| 114 | } \
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| 115 | \
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| 116 | return 0; \
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| 117 | } \
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| 118 | \
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| 119 | struct charset_functions CHARSETNAME ## _functions = \
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| 120 | {#CHARSETNAME, CHARSETNAME ## _pull, CHARSETNAME ## _push}; \
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| 121 | \
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| 122 | NTSTATUS charset_ ## CHARSETNAME ## _init(void); \
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| 123 | NTSTATUS charset_ ## CHARSETNAME ## _init(void) \
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| 124 | { \
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| 125 | return smb_register_charset(& CHARSETNAME ## _functions); \
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| 126 | } \
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| 127 |
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