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127 lines
4.0 KiB
C
127 lines
4.0 KiB
C
/*
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Unix SMB/CIFS implementation.
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charset defines
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Copyright (C) Andrew Tridgell 2001
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Copyright (C) Jelmer Vernooij 2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* this defines the charset types used in samba */
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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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#define NUM_CHARSETS 6
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/*
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* for each charset we have a function that pushes from that charset to a ucs2
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* buffer, and a function that pulls from ucs2 buffer to that charset.
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* */
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struct charset_functions {
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const char *name;
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size_t (*pull)(void *, const char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft);
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size_t (*push)(void *, const char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft);
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struct charset_functions *prev, *next;
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};
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/*
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* This is auxiliary struct used by source/script/gen-8-bit-gap.sh script
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* during generation of an encoding table for charset module
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* */
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struct charset_gap_table {
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uint16 start;
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uint16 end;
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int32 idx;
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};
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/*
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* Define stub for charset module which implements 8-bit encoding with gaps.
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* Encoding tables for such module should be produced from glibc's CHARMAPs
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* using script source/script/gen-8bit-gap.sh
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* CHARSETNAME is CAPITALIZED charset name
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*
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* */
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#define SMB_GENERATE_CHARSET_MODULE_8_BIT_GAP(CHARSETNAME) \
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static size_t CHARSETNAME ## _push(void *cd, const char **inbuf, size_t *inbytesleft, \
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char **outbuf, size_t *outbytesleft) \
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{ \
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while (*inbytesleft >= 2 && *outbytesleft >= 1) { \
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int i; \
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int done = 0; \
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\
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uint16 ch = SVAL(*inbuf,0); \
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\
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for (i=0; from_idx[i].start != 0xffff; i++) { \
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if ((from_idx[i].start <= ch) && (from_idx[i].end >= ch)) { \
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((unsigned char*)(*outbuf))[0] = from_ucs2[from_idx[i].idx+ch]; \
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(*inbytesleft) -= 2; \
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(*outbytesleft) -= 1; \
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(*inbuf) += 2; \
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(*outbuf) += 1; \
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done = 1; \
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break; \
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} \
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} \
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if (!done) { \
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errno = EINVAL; \
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return -1; \
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} \
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\
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} \
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\
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if (*inbytesleft == 1) { \
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errno = EINVAL; \
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return -1; \
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} \
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\
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if (*inbytesleft > 1) { \
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errno = E2BIG; \
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return -1; \
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} \
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\
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return 0; \
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} \
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\
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static size_t CHARSETNAME ## _pull(void *cd, const char **inbuf, size_t *inbytesleft, \
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char **outbuf, size_t *outbytesleft) \
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{ \
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while (*inbytesleft >= 1 && *outbytesleft >= 2) { \
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*(uint16*)(*outbuf) = to_ucs2[((unsigned char*)(*inbuf))[0]]; \
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(*inbytesleft) -= 1; \
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(*outbytesleft) -= 2; \
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(*inbuf) += 1; \
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(*outbuf) += 2; \
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} \
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\
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if (*inbytesleft > 0) { \
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errno = E2BIG; \
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return -1; \
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} \
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\
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return 0; \
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} \
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\
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struct charset_functions CHARSETNAME ## _functions = \
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{#CHARSETNAME, CHARSETNAME ## _pull, CHARSETNAME ## _push}; \
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\
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NTSTATUS charset_ ## CHARSETNAME ## _init(void); \
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NTSTATUS charset_ ## CHARSETNAME ## _init(void) \
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{ \
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return smb_register_charset(& CHARSETNAME ## _functions); \
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} \
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