Update.
[glibc.git] / iconv / iconv.c
blobd0f5528f55b7a6b877b6ea7520183cef48904ff3
1 /* Convert characters in input buffer using conversion descriptor to
2 output buffer.
3 Copyright (C) 1997, 1998, 1999, 2000 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 <stddef.h> /* for NULL */
23 #include <errno.h>
24 #include <iconv.h>
26 #include <gconv_int.h>
28 #include <assert.h>
31 size_t
32 iconv (iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf,
33 size_t *outbytesleft)
35 __gconv_t gcd = (__gconv_t) cd;
36 char *outstart = outbuf ? *outbuf : NULL;
37 size_t irreversible;
38 int result;
40 if (__builtin_expect (inbuf == NULL || *inbuf == NULL, 0))
42 if (outbuf == NULL || *outbuf == NULL)
43 result = __gconv (gcd, NULL, NULL, NULL, NULL, &irreversible);
44 else
45 result = __gconv (gcd, NULL, NULL, (unsigned char **) outbuf,
46 (unsigned char *) (outstart + *outbytesleft),
47 &irreversible);
49 else
51 const char *instart = *inbuf;
53 result = __gconv (gcd, (const unsigned char **) inbuf,
54 (const unsigned char *) (*inbuf + *inbytesleft),
55 (unsigned char **) outbuf,
56 (unsigned char *) (*outbuf + *outbytesleft),
57 &irreversible);
59 *inbytesleft -= *inbuf - instart;
61 if (outstart != NULL)
62 *outbytesleft -= *outbuf - outstart;
64 switch (__builtin_expect (result, __GCONV_OK))
66 case __GCONV_ILLEGAL_DESCRIPTOR:
67 __set_errno (EBADF);
68 irreversible = (size_t) -1L;
69 break;
71 case __GCONV_ILLEGAL_INPUT:
72 __set_errno (EILSEQ);
73 irreversible = (size_t) -1L;
74 break;
76 case __GCONV_FULL_OUTPUT:
77 __set_errno (E2BIG);
78 irreversible = (size_t) -1L;
79 break;
81 case __GCONV_INCOMPLETE_INPUT:
82 __set_errno (EINVAL);
83 irreversible = (size_t) -1L;
84 break;
86 case __GCONV_EMPTY_INPUT:
87 case __GCONV_OK:
88 /* Nothing. */
89 break;
91 default:
92 assert (!"Nothing like this should happen");
95 return irreversible;