]>
Commit | Line | Data |
---|---|---|
688903eb | 1 | /* Copyright (C) 1996-2018 Free Software Foundation, Inc. |
33a934a3 | 2 | This file is part of the GNU C Library. |
d788be1e | 3 | Contributed by Ulrich Drepper <drepper@gnu.org>, 1996. |
33a934a3 UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
33a934a3 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
33a934a3 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
036cc82f | 18 | |
915a6c51 | 19 | #include <assert.h> |
55985355 | 20 | #include <dlfcn.h> |
036cc82f | 21 | #include <errno.h> |
4bca4c17 UD |
22 | #include <gconv.h> |
23 | #include <string.h> | |
036cc82f | 24 | #include <wchar.h> |
4bca4c17 UD |
25 | #include <wcsmbsload.h> |
26 | ||
915a6c51 | 27 | #include <sysdep.h> |
036cc82f RM |
28 | |
29 | #ifndef EILSEQ | |
4bca4c17 | 30 | # define EILSEQ EINVAL |
036cc82f RM |
31 | #endif |
32 | ||
33 | ||
4bca4c17 UD |
34 | /* This is the private state used if PS is NULL. */ |
35 | static mbstate_t state; | |
036cc82f RM |
36 | |
37 | /* This is a non-standard function but it is very useful in the | |
38 | implementation of stdio because we have to deal with unterminated | |
39 | buffers. At most NMC bytes will be converted. */ | |
40 | size_t | |
9dd346ff JM |
41 | __mbsnrtowcs (wchar_t *dst, const char **src, size_t nmc, size_t len, |
42 | mbstate_t *ps) | |
036cc82f | 43 | { |
b117f744 | 44 | const unsigned char *srcend; |
d64b6ad0 | 45 | struct __gconv_step_data data; |
1da6cab2 | 46 | size_t result; |
4bca4c17 | 47 | int status; |
d64b6ad0 | 48 | struct __gconv_step *towc; |
55985355 | 49 | size_t dummy; |
96310297 | 50 | const struct gconv_fcts *fcts; |
036cc82f | 51 | |
4bca4c17 | 52 | /* Tell where we want the result. */ |
d64b6ad0 UD |
53 | data.__invocation_counter = 0; |
54 | data.__internal_use = 1; | |
85830c4c | 55 | data.__flags = __GCONV_IS_LAST; |
d64b6ad0 | 56 | data.__statep = ps ?: &state; |
036cc82f | 57 | |
4bca4c17 UD |
58 | if (nmc == 0) |
59 | return 0; | |
1c99f950 | 60 | srcend = (const unsigned char *) *src + __strnlen (*src, nmc - 1) + 1; |
f4017d20 | 61 | |
96310297 RM |
62 | /* Get the conversion functions. */ |
63 | fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE)); | |
036cc82f | 64 | |
d64b6ad0 | 65 | /* Get the structure with the function pointers. */ |
96310297 | 66 | towc = fcts->towc; |
915a6c51 UD |
67 | __gconv_fct fct = towc->__fct; |
68 | #ifdef PTR_DEMANGLE | |
69 | if (towc->__shlib_handle != NULL) | |
70 | PTR_DEMANGLE (fct); | |
71 | #endif | |
d64b6ad0 | 72 | |
4bca4c17 UD |
73 | /* We have to handle DST == NULL special. */ |
74 | if (dst == NULL) | |
036cc82f | 75 | { |
bf93cd3b | 76 | mbstate_t temp_state; |
4bca4c17 | 77 | wchar_t buf[64]; /* Just an arbitrary size. */ |
1c99f950 | 78 | const unsigned char *inbuf = (const unsigned char *) *src; |
4bca4c17 | 79 | |
bf93cd3b UD |
80 | temp_state = *data.__statep; |
81 | data.__statep = &temp_state; | |
82 | ||
1da6cab2 UD |
83 | result = 0; |
84 | data.__outbufend = (unsigned char *) buf + sizeof (buf); | |
4bca4c17 | 85 | do |
d079f321 | 86 | { |
1da6cab2 | 87 | data.__outbuf = (unsigned char *) buf; |
d079f321 | 88 | |
915a6c51 UD |
89 | status = DL_CALL_FCT (fct, (towc, &data, &inbuf, srcend, NULL, |
90 | &dummy, 0, 1)); | |
1da6cab2 UD |
91 | |
92 | result += (wchar_t *) data.__outbuf - buf; | |
d079f321 | 93 | } |
d64b6ad0 | 94 | while (status == __GCONV_FULL_OUTPUT); |
f4017d20 | 95 | |
d64b6ad0 UD |
96 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
97 | && ((wchar_t *) data.__outbuf)[-1] == L'\0') | |
4bca4c17 UD |
98 | /* Don't count the NUL character in. */ |
99 | --result; | |
100 | } | |
101 | else | |
102 | { | |
103 | /* This code is based on the safe assumption that all internal | |
104 | multi-byte encodings use the NUL byte only to mark the end | |
105 | of the string. */ | |
d64b6ad0 UD |
106 | data.__outbuf = (unsigned char *) dst; |
107 | data.__outbufend = data.__outbuf + len * sizeof (wchar_t); | |
4bca4c17 | 108 | |
915a6c51 | 109 | status = DL_CALL_FCT (fct, |
55985355 | 110 | (towc, &data, (const unsigned char **) src, srcend, |
f1d5c60d | 111 | NULL, &dummy, 0, 1)); |
1da6cab2 UD |
112 | |
113 | result = (wchar_t *) data.__outbuf - dst; | |
4bca4c17 UD |
114 | |
115 | /* We have to determine whether the last character converted | |
116 | is the NUL character. */ | |
d64b6ad0 | 117 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
1da6cab2 UD |
118 | && (assert (result > 0), |
119 | ((wchar_t *) dst)[result - 1] == L'\0')) | |
036cc82f | 120 | { |
d64b6ad0 | 121 | assert (__mbsinit (data.__statep)); |
036cc82f | 122 | *src = NULL; |
4bca4c17 | 123 | --result; |
036cc82f | 124 | } |
036cc82f RM |
125 | } |
126 | ||
4bca4c17 UD |
127 | /* There must not be any problems with the conversion but illegal input |
128 | characters. */ | |
1da6cab2 | 129 | assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT |
d64b6ad0 UD |
130 | || status == __GCONV_ILLEGAL_INPUT |
131 | || status == __GCONV_INCOMPLETE_INPUT | |
132 | || status == __GCONV_FULL_OUTPUT); | |
4bca4c17 | 133 | |
d64b6ad0 | 134 | if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT |
1da6cab2 | 135 | && status != __GCONV_EMPTY_INPUT && status != __GCONV_INCOMPLETE_INPUT) |
4bca4c17 UD |
136 | { |
137 | result = (size_t) -1; | |
138 | __set_errno (EILSEQ); | |
139 | } | |
036cc82f | 140 | |
4bca4c17 | 141 | return result; |
036cc82f RM |
142 | } |
143 | weak_alias (__mbsnrtowcs, mbsnrtowcs) |