1/* Convert characters in input buffer using conversion descriptor to
2 output buffer.
3 Copyright (C) 1997-2016 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6
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.
11
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.
16
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
20
21#include <assert.h>
22#include <dlfcn.h>
23#include <stddef.h>
24#include <sys/param.h>
25
26#include <gconv_int.h>
27#include <sysdep.h>
28
29
30int
31internal_function
32__gconv (__gconv_t cd, const unsigned char **inbuf,
33 const unsigned char *inbufend, unsigned char **outbuf,
34 unsigned char *outbufend, size_t *irreversible)
35{
36 size_t last_step;
37 int result;
38
39 if (cd == (__gconv_t) -1L)
40 return __GCONV_ILLEGAL_DESCRIPTOR;
41
42 last_step = cd->__nsteps - 1;
43
44 assert (irreversible != NULL);
45 *irreversible = 0;
46
47 cd->__data[last_step].__outbuf = outbuf != NULL ? *outbuf : NULL;
48 cd->__data[last_step].__outbufend = outbufend;
49
50 __gconv_fct fct = cd->__steps->__fct;
51#ifdef PTR_DEMANGLE
52 if (cd->__steps->__shlib_handle != NULL)
53 PTR_DEMANGLE (fct);
54#endif
55
56 if (inbuf == NULL || *inbuf == NULL)
57 {
58 /* We just flush. */
59 result = DL_CALL_FCT (fct,
60 (cd->__steps, cd->__data, NULL, NULL, NULL,
61 irreversible,
62 cd->__data[last_step].__outbuf == NULL ? 2 : 1,
63 0));
64
65 /* If the flush was successful clear the rest of the state. */
66 if (result == __GCONV_OK)
67 for (size_t cnt = 0; cnt <= last_step; ++cnt)
68 cd->__data[cnt].__invocation_counter = 0;
69 }
70 else
71 {
72 const unsigned char *last_start;
73
74 assert (outbuf != NULL && *outbuf != NULL);
75
76 do
77 {
78 last_start = *inbuf;
79 result = DL_CALL_FCT (fct,
80 (cd->__steps, cd->__data, inbuf, inbufend,
81 NULL, irreversible, 0, 0));
82 }
83 while (result == __GCONV_EMPTY_INPUT && last_start != *inbuf
84 && *inbuf + cd->__steps->__min_needed_from <= inbufend);
85 }
86
87 if (outbuf != NULL && *outbuf != NULL)
88 *outbuf = cd->__data[last_step].__outbuf;
89
90 return result;
91}
92