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688903eb | 1 | /* Copyright (C) 1996-2018 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 | |
9dd346ff JM |
40 | __wcsnrtombs (char *dst, const wchar_t **src, size_t nwc, size_t len, |
41 | mbstate_t *ps) | |
036cc82f | 42 | { |
d64b6ad0 | 43 | struct __gconv_step_data data; |
8619129f | 44 | const wchar_t *srcend; |
4bca4c17 | 45 | int status; |
23f0c99c | 46 | size_t result; |
d64b6ad0 | 47 | struct __gconv_step *tomb; |
96310297 | 48 | const struct gconv_fcts *fcts; |
036cc82f | 49 | |
4bca4c17 | 50 | /* Tell where we want the result. */ |
d64b6ad0 UD |
51 | data.__invocation_counter = 0; |
52 | data.__internal_use = 1; | |
85830c4c | 53 | data.__flags = __GCONV_IS_LAST; |
d64b6ad0 | 54 | data.__statep = ps ?: &state; |
036cc82f | 55 | |
4bca4c17 UD |
56 | if (nwc == 0) |
57 | return 0; | |
8619129f | 58 | srcend = *src + __wcsnlen (*src, nwc - 1) + 1; |
036cc82f | 59 | |
96310297 RM |
60 | /* Get the conversion functions. */ |
61 | fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE)); | |
f4017d20 | 62 | |
d64b6ad0 | 63 | /* Get the structure with the function pointers. */ |
96310297 | 64 | tomb = fcts->tomb; |
915a6c51 UD |
65 | __gconv_fct fct = tomb->__fct; |
66 | #ifdef PTR_DEMANGLE | |
67 | if (tomb->__shlib_handle != NULL) | |
68 | PTR_DEMANGLE (fct); | |
69 | #endif | |
d64b6ad0 | 70 | |
4bca4c17 UD |
71 | /* We have to handle DST == NULL special. */ |
72 | if (dst == NULL) | |
73 | { | |
72098116 | 74 | mbstate_t temp_state; |
b117f744 | 75 | unsigned char buf[256]; /* Just an arbitrary value. */ |
9c7ff11a | 76 | const unsigned char *inbuf = (const unsigned char *) *src; |
23f0c99c | 77 | size_t dummy; |
f4017d20 | 78 | |
72098116 UD |
79 | temp_state = *data.__statep; |
80 | data.__statep = &temp_state; | |
81 | ||
23f0c99c | 82 | result = 0; |
d64b6ad0 | 83 | data.__outbufend = buf + sizeof (buf); |
036cc82f | 84 | |
4bca4c17 | 85 | do |
d079f321 | 86 | { |
d64b6ad0 | 87 | data.__outbuf = buf; |
d079f321 | 88 | |
915a6c51 UD |
89 | status = DL_CALL_FCT (fct, (tomb, &data, &inbuf, |
90 | (const unsigned char *) srcend, NULL, | |
91 | &dummy, 0, 1)); | |
23f0c99c UD |
92 | |
93 | /* Count the number of bytes. */ | |
d64b6ad0 | 94 | result += data.__outbuf - buf; |
d079f321 | 95 | } |
d64b6ad0 | 96 | while (status == __GCONV_FULL_OUTPUT); |
036cc82f | 97 | |
d64b6ad0 UD |
98 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
99 | && data.__outbuf[-1] == '\0') | |
4bca4c17 UD |
100 | /* Don't count the NUL character in. */ |
101 | --result; | |
102 | } | |
103 | else | |
104 | { | |
105 | /* This code is based on the safe assumption that all internal | |
106 | multi-byte encodings use the NUL byte only to mark the end | |
107 | of the string. */ | |
23f0c99c UD |
108 | size_t dummy; |
109 | ||
1c99f950 UD |
110 | data.__outbuf = (unsigned char *) dst; |
111 | data.__outbufend = (unsigned char *) dst + len; | |
4bca4c17 | 112 | |
915a6c51 UD |
113 | status = DL_CALL_FCT (fct, (tomb, &data, (const unsigned char **) src, |
114 | (const unsigned char *) srcend, NULL, | |
115 | &dummy, 0, 1)); | |
23f0c99c UD |
116 | |
117 | /* Count the number of bytes. */ | |
d64b6ad0 | 118 | result = data.__outbuf - (unsigned char *) dst; |
4bca4c17 UD |
119 | |
120 | /* We have to determine whether the last character converted | |
121 | is the NUL character. */ | |
d64b6ad0 UD |
122 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
123 | && data.__outbuf[-1] == '\0') | |
036cc82f | 124 | { |
d64b6ad0 UD |
125 | assert (data.__outbuf != (unsigned char *) dst); |
126 | assert (__mbsinit (data.__statep)); | |
036cc82f | 127 | *src = NULL; |
4bca4c17 | 128 | --result; |
036cc82f | 129 | } |
4bca4c17 | 130 | } |
036cc82f | 131 | |
4bca4c17 UD |
132 | /* There must not be any problems with the conversion but illegal input |
133 | characters. */ | |
d64b6ad0 UD |
134 | assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT |
135 | || status == __GCONV_ILLEGAL_INPUT | |
136 | || status == __GCONV_INCOMPLETE_INPUT | |
137 | || status == __GCONV_FULL_OUTPUT); | |
036cc82f | 138 | |
d64b6ad0 UD |
139 | if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT |
140 | && status != __GCONV_EMPTY_INPUT) | |
4bca4c17 UD |
141 | { |
142 | result = (size_t) -1; | |
143 | __set_errno (EILSEQ); | |
036cc82f RM |
144 | } |
145 | ||
4bca4c17 | 146 | return result; |
036cc82f RM |
147 | } |
148 | weak_alias (__wcsnrtombs, wcsnrtombs) |