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 */ 23typedef enum {CH_UTF16LE=0, CH_UTF16=0, CH_UNIX=1, CH_DISPLAY=2, CH_DOS=3, CH_UTF8=4, CH_UTF16BE=5} charset_t; 24 25#define NUM_CHARSETS 6 26 27/* 28 * for each charset we have a function that pushes from that charset to a ucs2 29 * buffer, and a function that pulls from ucs2 buffer to that charset. 30 * */ 31 32struct charset_functions { 33 const char *name; 34 size_t (*pull)(void *, const char **inbuf, size_t *inbytesleft, 35 char **outbuf, size_t *outbytesleft); 36 size_t (*push)(void *, const char **inbuf, size_t *inbytesleft, 37 char **outbuf, size_t *outbytesleft); 38 struct charset_functions *prev, *next; 39}; 40 41/* 42 * This is auxiliary struct used by source/script/gen-8-bit-gap.sh script 43 * during generation of an encoding table for charset module 44 * */ 45 46struct charset_gap_table { 47 uint16 start; 48 uint16 end; 49 int32 idx; 50}; 51 52/* 53 * Define stub for charset module which implements 8-bit encoding with gaps. 54 * Encoding tables for such module should be produced from glibc's CHARMAPs 55 * using script source/script/gen-8bit-gap.sh 56 * CHARSETNAME is CAPITALIZED charset name 57 * 58 * */ 59#define SMB_GENERATE_CHARSET_MODULE_8_BIT_GAP(CHARSETNAME) \ 60static size_t CHARSETNAME ## _push(void *cd, const char **inbuf, size_t *inbytesleft, \ 61 char **outbuf, size_t *outbytesleft) \ 62{ \ 63 while (*inbytesleft >= 2 && *outbytesleft >= 1) { \ 64 int i; \ 65 int done = 0; \ 66 \ 67 uint16 ch = SVAL(*inbuf,0); \ 68 \ 69 for (i=0; from_idx[i].start != 0xffff; i++) { \ 70 if ((from_idx[i].start <= ch) && (from_idx[i].end >= ch)) { \ 71 ((unsigned char*)(*outbuf))[0] = from_ucs2[from_idx[i].idx+ch]; \ 72 (*inbytesleft) -= 2; \ 73 (*outbytesleft) -= 1; \ 74 (*inbuf) += 2; \ 75 (*outbuf) += 1; \ 76 done = 1; \ 77 break; \ 78 } \ 79 } \ 80 if (!done) { \ 81 errno = EINVAL; \ 82 return -1; \ 83 } \ 84 \ 85 } \ 86 \ 87 if (*inbytesleft == 1) { \ 88 errno = EINVAL; \ 89 return -1; \ 90 } \ 91 \ 92 if (*inbytesleft > 1) { \ 93 errno = E2BIG; \ 94 return -1; \ 95 } \ 96 \ 97 return 0; \ 98} \ 99 \ 100static size_t CHARSETNAME ## _pull(void *cd, const char **inbuf, size_t *inbytesleft, \ 101 char **outbuf, size_t *outbytesleft) \ 102{ \ 103 while (*inbytesleft >= 1 && *outbytesleft >= 2) { \ 104 *(uint16*)(*outbuf) = to_ucs2[((unsigned char*)(*inbuf))[0]]; \ 105 (*inbytesleft) -= 1; \ 106 (*outbytesleft) -= 2; \ 107 (*inbuf) += 1; \ 108 (*outbuf) += 2; \ 109 } \ 110 \ 111 if (*inbytesleft > 0) { \ 112 errno = E2BIG; \ 113 return -1; \ 114 } \ 115 \ 116 return 0; \ 117} \ 118 \ 119struct charset_functions CHARSETNAME ## _functions = \ 120 {#CHARSETNAME, CHARSETNAME ## _pull, CHARSETNAME ## _push}; \ 121 \ 122NTSTATUS charset_ ## CHARSETNAME ## _init(void); \ 123NTSTATUS charset_ ## CHARSETNAME ## _init(void) \ 124{ \ 125 return smb_register_charset(& CHARSETNAME ## _functions); \ 126} \ 127 128