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d4697bc9 | 1 | /* Copyright (C) 1996-2014 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 | |
41 | __mbsnrtowcs (dst, src, nmc, len, ps) | |
42 | wchar_t *dst; | |
43 | const char **src; | |
44 | size_t nmc; | |
45 | size_t len; | |
46 | mbstate_t *ps; | |
47 | { | |
b117f744 | 48 | const unsigned char *srcend; |
d64b6ad0 | 49 | struct __gconv_step_data data; |
1da6cab2 | 50 | size_t result; |
4bca4c17 | 51 | int status; |
d64b6ad0 | 52 | struct __gconv_step *towc; |
55985355 | 53 | size_t dummy; |
96310297 | 54 | const struct gconv_fcts *fcts; |
036cc82f | 55 | |
4bca4c17 | 56 | /* Tell where we want the result. */ |
d64b6ad0 UD |
57 | data.__invocation_counter = 0; |
58 | data.__internal_use = 1; | |
85830c4c | 59 | data.__flags = __GCONV_IS_LAST; |
d64b6ad0 | 60 | data.__statep = ps ?: &state; |
d6204268 | 61 | data.__trans = NULL; |
036cc82f | 62 | |
4bca4c17 UD |
63 | if (nmc == 0) |
64 | return 0; | |
1c99f950 | 65 | srcend = (const unsigned char *) *src + __strnlen (*src, nmc - 1) + 1; |
f4017d20 | 66 | |
96310297 RM |
67 | /* Get the conversion functions. */ |
68 | fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE)); | |
036cc82f | 69 | |
d64b6ad0 | 70 | /* Get the structure with the function pointers. */ |
96310297 | 71 | towc = fcts->towc; |
915a6c51 UD |
72 | __gconv_fct fct = towc->__fct; |
73 | #ifdef PTR_DEMANGLE | |
74 | if (towc->__shlib_handle != NULL) | |
75 | PTR_DEMANGLE (fct); | |
76 | #endif | |
d64b6ad0 | 77 | |
4bca4c17 UD |
78 | /* We have to handle DST == NULL special. */ |
79 | if (dst == NULL) | |
036cc82f | 80 | { |
bf93cd3b | 81 | mbstate_t temp_state; |
4bca4c17 | 82 | wchar_t buf[64]; /* Just an arbitrary size. */ |
1c99f950 | 83 | const unsigned char *inbuf = (const unsigned char *) *src; |
4bca4c17 | 84 | |
bf93cd3b UD |
85 | temp_state = *data.__statep; |
86 | data.__statep = &temp_state; | |
87 | ||
1da6cab2 UD |
88 | result = 0; |
89 | data.__outbufend = (unsigned char *) buf + sizeof (buf); | |
4bca4c17 | 90 | do |
d079f321 | 91 | { |
1da6cab2 | 92 | data.__outbuf = (unsigned char *) buf; |
d079f321 | 93 | |
915a6c51 UD |
94 | status = DL_CALL_FCT (fct, (towc, &data, &inbuf, srcend, NULL, |
95 | &dummy, 0, 1)); | |
1da6cab2 UD |
96 | |
97 | result += (wchar_t *) data.__outbuf - buf; | |
d079f321 | 98 | } |
d64b6ad0 | 99 | while (status == __GCONV_FULL_OUTPUT); |
f4017d20 | 100 | |
d64b6ad0 UD |
101 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
102 | && ((wchar_t *) data.__outbuf)[-1] == L'\0') | |
4bca4c17 UD |
103 | /* Don't count the NUL character in. */ |
104 | --result; | |
105 | } | |
106 | else | |
107 | { | |
108 | /* This code is based on the safe assumption that all internal | |
109 | multi-byte encodings use the NUL byte only to mark the end | |
110 | of the string. */ | |
d64b6ad0 UD |
111 | data.__outbuf = (unsigned char *) dst; |
112 | data.__outbufend = data.__outbuf + len * sizeof (wchar_t); | |
4bca4c17 | 113 | |
915a6c51 | 114 | status = DL_CALL_FCT (fct, |
55985355 | 115 | (towc, &data, (const unsigned char **) src, srcend, |
f1d5c60d | 116 | NULL, &dummy, 0, 1)); |
1da6cab2 UD |
117 | |
118 | result = (wchar_t *) data.__outbuf - dst; | |
4bca4c17 UD |
119 | |
120 | /* We have to determine whether the last character converted | |
121 | is the NUL character. */ | |
d64b6ad0 | 122 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
1da6cab2 UD |
123 | && (assert (result > 0), |
124 | ((wchar_t *) dst)[result - 1] == L'\0')) | |
036cc82f | 125 | { |
d64b6ad0 | 126 | assert (__mbsinit (data.__statep)); |
036cc82f | 127 | *src = NULL; |
4bca4c17 | 128 | --result; |
036cc82f | 129 | } |
036cc82f RM |
130 | } |
131 | ||
4bca4c17 UD |
132 | /* There must not be any problems with the conversion but illegal input |
133 | characters. */ | |
1da6cab2 | 134 | assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT |
d64b6ad0 UD |
135 | || status == __GCONV_ILLEGAL_INPUT |
136 | || status == __GCONV_INCOMPLETE_INPUT | |
137 | || status == __GCONV_FULL_OUTPUT); | |
4bca4c17 | 138 | |
d64b6ad0 | 139 | if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT |
1da6cab2 | 140 | && status != __GCONV_EMPTY_INPUT && status != __GCONV_INCOMPLETE_INPUT) |
4bca4c17 UD |
141 | { |
142 | result = (size_t) -1; | |
143 | __set_errno (EILSEQ); | |
144 | } | |
036cc82f | 145 | |
4bca4c17 | 146 | return result; |
036cc82f RM |
147 | } |
148 | weak_alias (__mbsnrtowcs, mbsnrtowcs) |