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r25068: Older samba3 DCs will return DCERPC_FAULT_OP_RNG_ERROR for every opcode on the
[Samba.git] / source / lib / iconv.c
blob90e2faab6fbca7bb921d7bdf2467ffee570ff046
1 /*
2 Unix SMB/CIFS implementation.
3 minimal iconv implementation
4 Copyright (C) Andrew Tridgell 2001
5 Copyright (C) Jelmer Vernooij 2002,2003
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 #include "includes.h"
23
24 /*
25 * We have to use strcasecmp here as the character conversions
26 * haven't been initialised yet. JRA.
27 */
28
29 #undef strcasecmp
30
31 /**
32 * @file
33 *
34 * @brief Samba wrapper/stub for iconv character set conversion.
35 *
36 * iconv is the XPG2 interface for converting between character
37 * encodings. This file provides a Samba wrapper around it, and also
38 * a simple reimplementation that is used if the system does not
39 * implement iconv.
40 *
41 * Samba only works with encodings that are supersets of ASCII: ascii
42 * characters like whitespace can be tested for directly, multibyte
43 * sequences start with a byte with the high bit set, and strings are
44 * terminated by a nul byte.
45 *
46 * Note that the only function provided by iconv is conversion between
47 * characters. It doesn't directly support operations like
48 * uppercasing or comparison. We have to convert to UCS-2 and compare
49 * there.
50 *
51 * @sa Samba Developers Guide
52 **/
53
54 static_decl_charset;
55
56 static size_t ascii_pull(void *,const char **, size_t *, char **, size_t *);
57 static size_t ascii_push(void *,const char **, size_t *, char **, size_t *);
58 static size_t latin1_push(void *,const char **, size_t *, char **, size_t *);
59 static size_t utf8_pull(void *,const char **, size_t *, char **, size_t *);
60 static size_t utf8_push(void *,const char **, size_t *, char **, size_t *);
61 static size_t ucs2hex_pull(void *,const char **, size_t *, char **, size_t *);
62 static size_t ucs2hex_push(void *,const char **, size_t *, char **, size_t *);
63 static size_t iconv_copy(void *,const char **, size_t *, char **, size_t *);
64 static size_t iconv_swab (void *,const char **, size_t *, char **, size_t *);
65
66 static struct charset_functions builtin_functions[] = {
67 /* windows is really neither UCS-2 not UTF-16 */
68 {"UCS-2LE", iconv_copy, iconv_copy},
69 {"UTF-16LE", iconv_copy, iconv_copy},
70 {"UCS-2BE", iconv_swab, iconv_swab},
71 {"UTF-16BE", iconv_swab, iconv_swab},
72
73 /* we include the UTF-8 alias to cope with differing locale settings */
74 {"UTF8", utf8_pull, utf8_push},
75 {"UTF-8", utf8_pull, utf8_push},
76 {"ASCII", ascii_pull, ascii_push},
77 {"646", ascii_pull, ascii_push},
78 {"ISO-8859-1", ascii_pull, latin1_push},
79 {"UCS2-HEX", ucs2hex_pull, ucs2hex_push},
80 {NULL, NULL, NULL}
81 };
82
83 static struct charset_functions *charsets = NULL;
84
85 static struct charset_functions *find_charset_functions(const char *name)
86 {
87 struct charset_functions *c = charsets;
88
89 while(c) {
90 if (strcasecmp(name, c->name) == 0) {
91 return c;
92 }
93 c = c->next;
94 }
95
96 return NULL;
97 }
98
99 NTSTATUS smb_register_charset(struct charset_functions *funcs)
100 {
101 if (!funcs) {
102 return NT_STATUS_INVALID_PARAMETER;
103 }
104
105 DEBUG(5, ("Attempting to register new charset %s\n", funcs->name));
106 /* Check whether we already have this charset... */
107 if (find_charset_functions(funcs->name)) {
108 DEBUG(0, ("Duplicate charset %s, not registering\n", funcs->name));
109 return NT_STATUS_OBJECT_NAME_COLLISION;
110 }
111
112 funcs->next = funcs->prev = NULL;
113 DEBUG(5, ("Registered charset %s\n", funcs->name));
114 DLIST_ADD(charsets, funcs);
115 return NT_STATUS_OK;
116 }
117
118 static void lazy_initialize_iconv(void)
119 {
120 static BOOL initialized;
121 int i;
122
123 if (!initialized) {
124 initialized = True;
125 for(i = 0; builtin_functions[i].name; i++)
126 smb_register_charset(&builtin_functions[i]);
127 static_init_charset;
128 }
129 }
130
131 #ifdef HAVE_NATIVE_ICONV
132 /* if there was an error then reset the internal state,
133 this ensures that we don't have a shift state remaining for
134 character sets like SJIS */
135 static size_t sys_iconv(void *cd,
136 const char **inbuf, size_t *inbytesleft,
137 char **outbuf, size_t *outbytesleft)
138 {
139 size_t ret = iconv((iconv_t)cd,
140 (char **)inbuf, inbytesleft,
141 outbuf, outbytesleft);
142 if (ret == (size_t)-1) {
143 int saved_errno = errno;
144 iconv(cd, NULL, NULL, NULL, NULL);
145 errno = saved_errno;
146 }
147 return ret;
148 }
149 #endif
150
151 /**
152 * This is a simple portable iconv() implementaion.
153 *
154 * It only knows about a very small number of character sets - just
155 * enough that Samba works on systems that don't have iconv.
156 **/
157 size_t smb_iconv(smb_iconv_t cd,
158 const char **inbuf, size_t *inbytesleft,
159 char **outbuf, size_t *outbytesleft)
160 {
161 char cvtbuf[2048];
162 char *bufp = cvtbuf;
163 size_t bufsize;
164
165 /* in many cases we can go direct */
166 if (cd->direct) {
167 return cd->direct(cd->cd_direct,
168 inbuf, inbytesleft, outbuf, outbytesleft);
169 }
170
171
172 /* otherwise we have to do it chunks at a time */
173 while (*inbytesleft > 0) {
174 bufp = cvtbuf;
175 bufsize = sizeof(cvtbuf);
176
177 if (cd->pull(cd->cd_pull,
178 inbuf, inbytesleft, &bufp, &bufsize) == -1
179 && errno != E2BIG) return -1;
180
181 bufp = cvtbuf;
182 bufsize = sizeof(cvtbuf) - bufsize;
183
184 if (cd->push(cd->cd_push,
185 (const char **)&bufp, &bufsize,
186 outbuf, outbytesleft) == -1) return -1;
187 }
188
189 return 0;
190 }
191
192
193 static BOOL is_utf16(const char *name)
194 {
195 return strcasecmp(name, "UCS-2LE") == 0 ||
196 strcasecmp(name, "UTF-16LE") == 0;
197 }
198
199 /*
200 simple iconv_open() wrapper
201 */
202 smb_iconv_t smb_iconv_open(const char *tocode, const char *fromcode)
203 {
204 smb_iconv_t ret;
205 struct charset_functions *from, *to;
206
207 lazy_initialize_iconv();
208 from = charsets;
209 to = charsets;
210
211 ret = SMB_MALLOC_P(struct _smb_iconv_t);
212 if (!ret) {
213 errno = ENOMEM;
214 return (smb_iconv_t)-1;
215 }
216 memset(ret, 0, sizeof(struct _smb_iconv_t));
217
218 ret->from_name = SMB_STRDUP(fromcode);
219 ret->to_name = SMB_STRDUP(tocode);
220
221 /* check for the simplest null conversion */
222 if (strcasecmp(fromcode, tocode) == 0) {
223 ret->direct = iconv_copy;
224 return ret;
225 }
226
227 /* check if we have a builtin function for this conversion */
228 from = find_charset_functions(fromcode);
229 if(from)ret->pull = from->pull;
230
231 to = find_charset_functions(tocode);
232 if(to)ret->push = to->push;
233
234 /* check if we can use iconv for this conversion */
235 #ifdef HAVE_NATIVE_ICONV
236 if (!ret->pull) {
237 ret->cd_pull = iconv_open("UTF-16LE", fromcode);
238 if (ret->cd_pull == (iconv_t)-1)
239 ret->cd_pull = iconv_open("UCS-2LE", fromcode);
240 if (ret->cd_pull != (iconv_t)-1)
241 ret->pull = sys_iconv;
242 }
243
244 if (!ret->push) {
245 ret->cd_push = iconv_open(tocode, "UTF-16LE");
246 if (ret->cd_push == (iconv_t)-1)
247 ret->cd_push = iconv_open(tocode, "UCS-2LE");
248 if (ret->cd_push != (iconv_t)-1)
249 ret->push = sys_iconv;
250 }
251 #endif
252
253 /* check if there is a module available that can do this conversion */
254 if (!ret->pull && NT_STATUS_IS_OK(smb_probe_module("charset", fromcode))) {
255 if(!(from = find_charset_functions(fromcode)))
256 DEBUG(0, ("Module %s doesn't provide charset %s!\n", fromcode, fromcode));
257 else
258 ret->pull = from->pull;
259 }
260
261 if (!ret->push && NT_STATUS_IS_OK(smb_probe_module("charset", tocode))) {
262 if(!(to = find_charset_functions(tocode)))
263 DEBUG(0, ("Module %s doesn't provide charset %s!\n", tocode, tocode));
264 else
265 ret->push = to->push;
266 }
267
268 if (!ret->push || !ret->pull) {
269 SAFE_FREE(ret->from_name);
270 SAFE_FREE(ret->to_name);
271 SAFE_FREE(ret);
272 errno = EINVAL;
273 return (smb_iconv_t)-1;
274 }
275
276 /* check for conversion to/from ucs2 */
277 if (is_utf16(fromcode) && to) {
278 ret->direct = to->push;
279 ret->push = ret->pull = NULL;
280 return ret;
281 }
282
283 if (is_utf16(tocode) && from) {
284 ret->direct = from->pull;
285 ret->push = ret->pull = NULL;
286 return ret;
287 }
288
289 /* Check if we can do the conversion direct */
290 #ifdef HAVE_NATIVE_ICONV
291 if (is_utf16(fromcode)) {
292 ret->direct = sys_iconv;
293 ret->cd_direct = ret->cd_push;
294 ret->cd_push = NULL;
295 return ret;
296 }
297 if (is_utf16(tocode)) {
298 ret->direct = sys_iconv;
299 ret->cd_direct = ret->cd_pull;
300 ret->cd_pull = NULL;
301 return ret;
302 }
303 #endif
304
305 return ret;
306 }
307
308 /*
309 simple iconv_close() wrapper
310 */
311 int smb_iconv_close (smb_iconv_t cd)
312 {
313 #ifdef HAVE_NATIVE_ICONV
314 if (cd->cd_direct) iconv_close((iconv_t)cd->cd_direct);
315 if (cd->cd_pull) iconv_close((iconv_t)cd->cd_pull);
316 if (cd->cd_push) iconv_close((iconv_t)cd->cd_push);
317 #endif
318
319 SAFE_FREE(cd->from_name);
320 SAFE_FREE(cd->to_name);
321
322 memset(cd, 0, sizeof(*cd));
323 SAFE_FREE(cd);
324 return 0;
325 }
326
327
328 /**********************************************************************
329 the following functions implement the builtin character sets in Samba
330 and also the "test" character sets that are designed to test
331 multi-byte character set support for english users
332 ***********************************************************************/
333
334 static size_t ascii_pull(void *cd, const char **inbuf, size_t *inbytesleft,
335 char **outbuf, size_t *outbytesleft)
336 {
337 while (*inbytesleft >= 1 && *outbytesleft >= 2) {
338 (*outbuf)[0] = (*inbuf)[0];
339 (*outbuf)[1] = 0;
340 (*inbytesleft) -= 1;
341 (*outbytesleft) -= 2;
342 (*inbuf) += 1;
343 (*outbuf) += 2;
344 }
345
346 if (*inbytesleft > 0) {
347 errno = E2BIG;
348 return -1;
349 }
350
351 return 0;
352 }
353
354 static size_t ascii_push(void *cd, const char **inbuf, size_t *inbytesleft,
355 char **outbuf, size_t *outbytesleft)
356 {
357 int ir_count=0;
358
359 while (*inbytesleft >= 2 && *outbytesleft >= 1) {
360 (*outbuf)[0] = (*inbuf)[0] & 0x7F;
361 if ((*inbuf)[1]) ir_count++;
362 (*inbytesleft) -= 2;
363 (*outbytesleft) -= 1;
364 (*inbuf) += 2;
365 (*outbuf) += 1;
366 }
367
368 if (*inbytesleft == 1) {
369 errno = EINVAL;
370 return -1;
371 }
372
373 if (*inbytesleft > 1) {
374 errno = E2BIG;
375 return -1;
376 }
377
378 return ir_count;
379 }
380
381 static size_t latin1_push(void *cd, const char **inbuf, size_t *inbytesleft,
382 char **outbuf, size_t *outbytesleft)
383 {
384 int ir_count=0;
385
386 while (*inbytesleft >= 2 && *outbytesleft >= 1) {
387 (*outbuf)[0] = (*inbuf)[0];
388 if ((*inbuf)[1]) ir_count++;
389 (*inbytesleft) -= 2;
390 (*outbytesleft) -= 1;
391 (*inbuf) += 2;
392 (*outbuf) += 1;
393 }
394
395 if (*inbytesleft == 1) {
396 errno = EINVAL;
397 return -1;
398 }
399
400 if (*inbytesleft > 1) {
401 errno = E2BIG;
402 return -1;
403 }
404
405 return ir_count;
406 }
407
408 static size_t ucs2hex_pull(void *cd, const char **inbuf, size_t *inbytesleft,
409 char **outbuf, size_t *outbytesleft)
410 {
411 while (*inbytesleft >= 1 && *outbytesleft >= 2) {
412 unsigned v;
413
414 if ((*inbuf)[0] != '@') {
415 /* seven bit ascii case */
416 (*outbuf)[0] = (*inbuf)[0];
417 (*outbuf)[1] = 0;
418 (*inbytesleft) -= 1;
419 (*outbytesleft) -= 2;
420 (*inbuf) += 1;
421 (*outbuf) += 2;
422 continue;
423 }
424 /* it's a hex character */
425 if (*inbytesleft < 5) {
426 errno = EINVAL;
427 return -1;
428 }
429
430 if (sscanf(&(*inbuf)[1], "%04x", &v) != 1) {
431 errno = EILSEQ;
432 return -1;
433 }
434
435 (*outbuf)[0] = v&0xff;
436 (*outbuf)[1] = v>>8;
437 (*inbytesleft) -= 5;
438 (*outbytesleft) -= 2;
439 (*inbuf) += 5;
440 (*outbuf) += 2;
441 }
442
443 if (*inbytesleft > 0) {
444 errno = E2BIG;
445 return -1;
446 }
447
448 return 0;
449 }
450
451 static size_t ucs2hex_push(void *cd, const char **inbuf, size_t *inbytesleft,
452 char **outbuf, size_t *outbytesleft)
453 {
454 while (*inbytesleft >= 2 && *outbytesleft >= 1) {
455 char buf[6];
456
457 if ((*inbuf)[1] == 0 &&
458 ((*inbuf)[0] & 0x80) == 0 &&
459 (*inbuf)[0] != '@') {
460 (*outbuf)[0] = (*inbuf)[0];
461 (*inbytesleft) -= 2;
462 (*outbytesleft) -= 1;
463 (*inbuf) += 2;
464 (*outbuf) += 1;
465 continue;
466 }
467 if (*outbytesleft < 5) {
468 errno = E2BIG;
469 return -1;
470 }
471 snprintf(buf, 6, "@%04x", SVAL(*inbuf, 0));
472 memcpy(*outbuf, buf, 5);
473 (*inbytesleft) -= 2;
474 (*outbytesleft) -= 5;
475 (*inbuf) += 2;
476 (*outbuf) += 5;
477 }
478
479 if (*inbytesleft == 1) {
480 errno = EINVAL;
481 return -1;
482 }
483
484 if (*inbytesleft > 1) {
485 errno = E2BIG;
486 return -1;
487 }
488
489 return 0;
490 }
491
492 static size_t iconv_swab(void *cd, const char **inbuf, size_t *inbytesleft,
493 char **outbuf, size_t *outbytesleft)
494 {
495 int n;
496
497 n = MIN(*inbytesleft, *outbytesleft);
498
499 swab(*inbuf, *outbuf, (n&~1));
500 if (n&1) {
501 (*outbuf)[n-1] = 0;
502 }
503
504 (*inbytesleft) -= n;
505 (*outbytesleft) -= n;
506 (*inbuf) += n;
507 (*outbuf) += n;
508
509 if (*inbytesleft > 0) {
510 errno = E2BIG;
511 return -1;
512 }
513
514 return 0;
515 }
516
517 static size_t iconv_copy(void *cd, const char **inbuf, size_t *inbytesleft,
518 char **outbuf, size_t *outbytesleft)
519 {
520 int n;
521
522 n = MIN(*inbytesleft, *outbytesleft);
523
524 memmove(*outbuf, *inbuf, n);
525
526 (*inbytesleft) -= n;
527 (*outbytesleft) -= n;
528 (*inbuf) += n;
529 (*outbuf) += n;
530
531 if (*inbytesleft > 0) {
532 errno = E2BIG;
533 return -1;
534 }
535
536 return 0;
537 }
538
539 static size_t utf8_pull(void *cd, const char **inbuf, size_t *inbytesleft,
540 char **outbuf, size_t *outbytesleft)
541 {
542 size_t in_left=*inbytesleft, out_left=*outbytesleft;
543 const uint8 *c = (const uint8 *)*inbuf;
544 uint8 *uc = (uint8 *)*outbuf;
545
546 while (in_left >= 1 && out_left >= 2) {
547 unsigned int codepoint;
548
549 if ((c[0] & 0x80) == 0) {
550 uc[0] = c[0];
551 uc[1] = 0;
552 c += 1;
553 in_left -= 1;
554 out_left -= 2;
555 uc += 2;
556 continue;
557 }
558
559 if ((c[0] & 0xe0) == 0xc0) {
560 if (in_left < 2 ||
561 (c[1] & 0xc0) != 0x80) {
562 errno = EILSEQ;
563 goto error;
564 }
565 codepoint = (c[1]&0x3f) | ((c[0]&0x1f)<<6);
566 if (codepoint < 0x80) {
567 /* don't accept UTF-8 characters that are not minimally packed */
568 errno = EILSEQ;
569 goto error;
570 }
571 uc[1] = codepoint >> 8;
572 uc[0] = codepoint & 0xff;
573 c += 2;
574 in_left -= 2;
575 out_left -= 2;
576 uc += 2;
577 continue;
578 }
579
580 if ((c[0] & 0xf0) == 0xe0) {
581 if (in_left < 3 ||
582 (c[1] & 0xc0) != 0x80 ||
583 (c[2] & 0xc0) != 0x80) {
584 errno = EILSEQ;
585 goto error;
586 }
587 codepoint = (c[2]&0x3f) | ((c[1]&0x3f)<<6) | ((c[0]&0xf)<<12);
588 if (codepoint < 0x800) {
589 /* don't accept UTF-8 characters that are not minimally packed */
590 errno = EILSEQ;
591 goto error;
592 }
593 uc[1] = codepoint >> 8;
594 uc[0] = codepoint & 0xff;
595 c += 3;
596 in_left -= 3;
597 out_left -= 2;
598 uc += 2;
599 continue;
600 }
601
602 if ((c[0] & 0xf8) == 0xf0) {
603 if (in_left < 4 ||
604 (c[1] & 0xc0) != 0x80 ||
605 (c[2] & 0xc0) != 0x80 ||
606 (c[3] & 0xc0) != 0x80) {
607 errno = EILSEQ;
608 goto error;
609 }
610 codepoint =
611 (c[3]&0x3f) |
612 ((c[2]&0x3f)<<6) |
613 ((c[1]&0x3f)<<12) |
614 ((c[0]&0x7)<<18);
615 if (codepoint < 0x10000 || codepoint > 0x10ffff) {
616 /* don't accept UTF-8 characters that are not minimally packed */
617 errno = EILSEQ;
618 goto error;
619 }
620
621 codepoint -= 0x10000;
622
623 if (out_left < 4) {
624 errno = E2BIG;
625 goto error;
626 }
627
628 uc[0] = (codepoint>>10) & 0xFF;
629 uc[1] = (codepoint>>18) | 0xd8;
630 uc[2] = codepoint & 0xFF;
631 uc[3] = ((codepoint>>8) & 0x3) | 0xdc;
632 c += 4;
633 in_left -= 4;
634 out_left -= 4;
635 uc += 4;
636 continue;
637 }
638
639 /* we don't handle 5 byte sequences */
640 errno = EINVAL;
641 goto error;
642 }
643
644 if (in_left > 0) {
645 errno = E2BIG;
646 goto error;
647 }
648
649 *inbytesleft = in_left;
650 *outbytesleft = out_left;
651 *inbuf = (char *)c;
652 *outbuf = (char *)uc;
653 return 0;
654
655 error:
656 *inbytesleft = in_left;
657 *outbytesleft = out_left;
658 *inbuf = (char *)c;
659 *outbuf = (char *)uc;
660 return -1;
661 }
662
663 static size_t utf8_push(void *cd, const char **inbuf, size_t *inbytesleft,
664 char **outbuf, size_t *outbytesleft)
665 {
666 size_t in_left=*inbytesleft, out_left=*outbytesleft;
667 uint8 *c = (uint8 *)*outbuf;
668 const uint8 *uc = (const uint8 *)*inbuf;
669
670 while (in_left >= 2 && out_left >= 1) {
671 unsigned int codepoint;
672
673 if (uc[1] == 0 && !(uc[0] & 0x80)) {
674 /* simplest case */
675 c[0] = uc[0];
676 in_left -= 2;
677 out_left -= 1;
678 uc += 2;
679 c += 1;
680 continue;
681 }
682
683 if ((uc[1]&0xf8) == 0) {
684 /* next simplest case */
685 if (out_left < 2) {
686 errno = E2BIG;
687 goto error;
688 }
689 c[0] = 0xc0 | (uc[0]>>6) | (uc[1]<<2);
690 c[1] = 0x80 | (uc[0] & 0x3f);
691 in_left -= 2;
692 out_left -= 2;
693 uc += 2;
694 c += 2;
695 continue;
696 }
697
698 if ((uc[1] & 0xfc) == 0xdc) {
699 /* its the second part of a 4 byte sequence. Illegal */
700 if (in_left < 4) {
701 errno = EINVAL;
702 } else {
703 errno = EILSEQ;
704 }
705 goto error;
706 }
707
708 if ((uc[1] & 0xfc) != 0xd8) {
709 codepoint = uc[0] | (uc[1]<<8);
710 if (out_left < 3) {
711 errno = E2BIG;
712 goto error;
713 }
714 c[0] = 0xe0 | (codepoint >> 12);
715 c[1] = 0x80 | ((codepoint >> 6) & 0x3f);
716 c[2] = 0x80 | (codepoint & 0x3f);
717
718 in_left -= 2;
719 out_left -= 3;
720 uc += 2;
721 c += 3;
722 continue;
723 }
724
725 /* its the first part of a 4 byte sequence */
726 if (in_left < 4) {
727 errno = EINVAL;
728 goto error;
729 }
730 if ((uc[3] & 0xfc) != 0xdc) {
731 errno = EILSEQ;
732 goto error;
733 }
734 codepoint = 0x10000 + (uc[2] | ((uc[3] & 0x3)<<8) |
735 (uc[0]<<10) | ((uc[1] & 0x3)<<18));
736
737 if (out_left < 4) {
738 errno = E2BIG;
739 goto error;
740 }
741 c[0] = 0xf0 | (codepoint >> 18);
742 c[1] = 0x80 | ((codepoint >> 12) & 0x3f);
743 c[2] = 0x80 | ((codepoint >> 6) & 0x3f);
744 c[3] = 0x80 | (codepoint & 0x3f);
745
746 in_left -= 4;
747 out_left -= 4;
748 uc += 4;
749 c += 4;
750 }
751
752 if (in_left == 1) {
753 errno = EINVAL;
754 goto error;
755 }
756
757 if (in_left > 1) {
758 errno = E2BIG;
759 goto error;
760 }
761
762 *inbytesleft = in_left;
763 *outbytesleft = out_left;
764 *inbuf = (char *)uc;
765 *outbuf = (char *)c;
766
767 return 0;
768
769 error:
770 *inbytesleft = in_left;
771 *outbytesleft = out_left;
772 *inbuf = (char *)uc;
773 *outbuf = (char *)c;
774 return -1;
775 }
776
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