Update.
[glibc.git] / iconv / gconv.c
blobf3f49b7db367e1a363820bfebb87de481e6254af
1 /* Convert characters in input buffer using conversion descriptor to
2 output buffer.
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library 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 GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, write to the Free
19 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 02111-1307 USA. */
22 #include <assert.h>
23 #include <gconv_int.h>
24 #include <sys/param.h>
25 #include <dlfcn.h>
26 #include <stddef.h>
28 int
29 internal_function
30 __gconv (__gconv_t cd, const unsigned char **inbuf,
31 const unsigned char *inbufend, unsigned char **outbuf,
32 unsigned char *outbufend, size_t *irreversible)
34 size_t last_step;
35 int result;
37 if (cd == (__gconv_t) -1L)
38 return __GCONV_ILLEGAL_DESCRIPTOR;
40 last_step = cd->__nsteps - 1;
42 assert (irreversible != NULL);
43 *irreversible = 0;
45 cd->__data[last_step].__outbuf = outbuf != NULL ? *outbuf : NULL;
46 cd->__data[last_step].__outbufend = outbufend;
48 if (inbuf == NULL || *inbuf == NULL)
49 /* We just flush. */
50 result = DL_CALL_FCT (cd->__steps->__fct,
51 (cd->__steps, cd->__data, NULL, NULL, NULL,
52 irreversible,
53 cd->__data[last_step].__outbuf == NULL ? 2 : 1, 0));
54 else
56 const unsigned char *last_start;
58 assert (outbuf != NULL && *outbuf != NULL);
62 last_start = *inbuf;
63 result = DL_CALL_FCT (cd->__steps->__fct,
64 (cd->__steps, cd->__data, inbuf, inbufend,
65 NULL, irreversible, 0, 0));
67 while (result == __GCONV_EMPTY_INPUT && last_start != *inbuf
68 && *inbuf + cd->__steps->__min_needed_from <= inbufend);
71 if (outbuf != NULL && *outbuf != NULL)
72 *outbuf = cd->__data[last_step].__outbuf;
74 return result;