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b168057a | 1 | /* Copyright (C) 1996-2015 Free Software Foundation, Inc. |
33a934a3 | 2 | This file is part of the GNU C Library. |
d64b6ad0 | 3 | Contributed by Ulrich Drepper <drepper@gnu.org>, 1996. |
036cc82f | 4 | |
33a934a3 | 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. | |
036cc82f | 9 | |
33a934a3 UD |
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. |
036cc82f | 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 | 22 | #include <gconv.h> |
036cc82f | 23 | #include <wchar.h> |
4bca4c17 UD |
24 | #include <wcsmbsload.h> |
25 | ||
915a6c51 | 26 | #include <sysdep.h> |
036cc82f RM |
27 | |
28 | #ifndef EILSEQ | |
4bca4c17 | 29 | # define EILSEQ EINVAL |
036cc82f RM |
30 | #endif |
31 | ||
32 | ||
4bca4c17 UD |
33 | /* This is the private state used if PS is NULL. */ |
34 | static mbstate_t state; | |
036cc82f RM |
35 | |
36 | /* This is a non-standard function but it is very useful in the | |
37 | implementation of stdio because we have to deal with unterminated | |
38 | buffers. At most NWC wide character will be converted. */ | |
39 | size_t | |
40 | __wcsnrtombs (dst, src, nwc, len, ps) | |
41 | char *dst; | |
42 | const wchar_t **src; | |
43 | size_t nwc; | |
44 | size_t len; | |
45 | mbstate_t *ps; | |
46 | { | |
d64b6ad0 | 47 | struct __gconv_step_data data; |
8619129f | 48 | const wchar_t *srcend; |
4bca4c17 | 49 | int status; |
23f0c99c | 50 | size_t result; |
d64b6ad0 | 51 | struct __gconv_step *tomb; |
96310297 | 52 | const struct gconv_fcts *fcts; |
036cc82f | 53 | |
4bca4c17 | 54 | /* Tell where we want the result. */ |
d64b6ad0 UD |
55 | data.__invocation_counter = 0; |
56 | data.__internal_use = 1; | |
85830c4c | 57 | data.__flags = __GCONV_IS_LAST; |
d64b6ad0 | 58 | data.__statep = ps ?: &state; |
036cc82f | 59 | |
4bca4c17 UD |
60 | if (nwc == 0) |
61 | return 0; | |
8619129f | 62 | srcend = *src + __wcsnlen (*src, nwc - 1) + 1; |
036cc82f | 63 | |
96310297 RM |
64 | /* Get the conversion functions. */ |
65 | fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE)); | |
f4017d20 | 66 | |
d64b6ad0 | 67 | /* Get the structure with the function pointers. */ |
96310297 | 68 | tomb = fcts->tomb; |
915a6c51 UD |
69 | __gconv_fct fct = tomb->__fct; |
70 | #ifdef PTR_DEMANGLE | |
71 | if (tomb->__shlib_handle != NULL) | |
72 | PTR_DEMANGLE (fct); | |
73 | #endif | |
d64b6ad0 | 74 | |
4bca4c17 UD |
75 | /* We have to handle DST == NULL special. */ |
76 | if (dst == NULL) | |
77 | { | |
72098116 | 78 | mbstate_t temp_state; |
b117f744 | 79 | unsigned char buf[256]; /* Just an arbitrary value. */ |
9c7ff11a | 80 | const unsigned char *inbuf = (const unsigned char *) *src; |
23f0c99c | 81 | size_t dummy; |
f4017d20 | 82 | |
72098116 UD |
83 | temp_state = *data.__statep; |
84 | data.__statep = &temp_state; | |
85 | ||
23f0c99c | 86 | result = 0; |
d64b6ad0 | 87 | data.__outbufend = buf + sizeof (buf); |
036cc82f | 88 | |
4bca4c17 | 89 | do |
d079f321 | 90 | { |
d64b6ad0 | 91 | data.__outbuf = buf; |
d079f321 | 92 | |
915a6c51 UD |
93 | status = DL_CALL_FCT (fct, (tomb, &data, &inbuf, |
94 | (const unsigned char *) srcend, NULL, | |
95 | &dummy, 0, 1)); | |
23f0c99c UD |
96 | |
97 | /* Count the number of bytes. */ | |
d64b6ad0 | 98 | result += data.__outbuf - buf; |
d079f321 | 99 | } |
d64b6ad0 | 100 | while (status == __GCONV_FULL_OUTPUT); |
036cc82f | 101 | |
d64b6ad0 UD |
102 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
103 | && data.__outbuf[-1] == '\0') | |
4bca4c17 UD |
104 | /* Don't count the NUL character in. */ |
105 | --result; | |
106 | } | |
107 | else | |
108 | { | |
109 | /* This code is based on the safe assumption that all internal | |
110 | multi-byte encodings use the NUL byte only to mark the end | |
111 | of the string. */ | |
23f0c99c UD |
112 | size_t dummy; |
113 | ||
1c99f950 UD |
114 | data.__outbuf = (unsigned char *) dst; |
115 | data.__outbufend = (unsigned char *) dst + len; | |
4bca4c17 | 116 | |
915a6c51 UD |
117 | status = DL_CALL_FCT (fct, (tomb, &data, (const unsigned char **) src, |
118 | (const unsigned char *) srcend, NULL, | |
119 | &dummy, 0, 1)); | |
23f0c99c UD |
120 | |
121 | /* Count the number of bytes. */ | |
d64b6ad0 | 122 | result = data.__outbuf - (unsigned char *) dst; |
4bca4c17 UD |
123 | |
124 | /* We have to determine whether the last character converted | |
125 | is the NUL character. */ | |
d64b6ad0 UD |
126 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
127 | && data.__outbuf[-1] == '\0') | |
036cc82f | 128 | { |
d64b6ad0 UD |
129 | assert (data.__outbuf != (unsigned char *) dst); |
130 | assert (__mbsinit (data.__statep)); | |
036cc82f | 131 | *src = NULL; |
4bca4c17 | 132 | --result; |
036cc82f | 133 | } |
4bca4c17 | 134 | } |
036cc82f | 135 | |
4bca4c17 UD |
136 | /* There must not be any problems with the conversion but illegal input |
137 | characters. */ | |
d64b6ad0 UD |
138 | assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT |
139 | || status == __GCONV_ILLEGAL_INPUT | |
140 | || status == __GCONV_INCOMPLETE_INPUT | |
141 | || status == __GCONV_FULL_OUTPUT); | |
036cc82f | 142 | |
d64b6ad0 UD |
143 | if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT |
144 | && status != __GCONV_EMPTY_INPUT) | |
4bca4c17 UD |
145 | { |
146 | result = (size_t) -1; | |
147 | __set_errno (EILSEQ); | |
036cc82f RM |
148 | } |
149 | ||
4bca4c17 | 150 | return result; |
036cc82f RM |
151 | } |
152 | weak_alias (__wcsnrtombs, wcsnrtombs) |