1 | /* Convert characters in input buffer using conversion descriptor to |
2 | output buffer. |
3 | Copyright (C) 1997-2017 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 | |
30 | int |
31 | internal_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 | |