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dff8da6b | 1 | /* Copyright (C) 1996-2024 Free Software Foundation, Inc. |
33a934a3 | 2 | This file is part of the GNU C Library. |
33a934a3 UD |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
33a934a3 UD |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
33a934a3 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
30de3b18 | 17 | |
915a6c51 | 18 | #include <assert.h> |
55985355 | 19 | #include <dlfcn.h> |
30de3b18 | 20 | #include <errno.h> |
4bca4c17 UD |
21 | #include <stdlib.h> |
22 | #include <gconv.h> | |
30de3b18 | 23 | #include <wchar.h> |
4bca4c17 UD |
24 | #include <wcsmbsload.h> |
25 | ||
88f4b692 | 26 | #include <pointer_guard.h> |
30de3b18 | 27 | |
80bcb410 | 28 | #ifndef EILSEQ |
4bca4c17 | 29 | # define EILSEQ EINVAL |
80bcb410 RM |
30 | #endif |
31 | ||
30de3b18 | 32 | |
4bca4c17 UD |
33 | /* This is the private state used if PS is NULL. */ |
34 | static mbstate_t state; | |
6dbe2837 | 35 | |
30de3b18 | 36 | size_t |
9dd346ff | 37 | __wcsrtombs (char *dst, const wchar_t **src, size_t len, mbstate_t *ps) |
30de3b18 | 38 | { |
d64b6ad0 | 39 | struct __gconv_step_data data; |
4bca4c17 | 40 | int status; |
23f0c99c | 41 | size_t result; |
d64b6ad0 | 42 | struct __gconv_step *tomb; |
96310297 | 43 | const struct gconv_fcts *fcts; |
30de3b18 | 44 | |
4bca4c17 | 45 | /* Tell where we want the result. */ |
d64b6ad0 UD |
46 | data.__invocation_counter = 0; |
47 | data.__internal_use = 1; | |
85830c4c | 48 | data.__flags = __GCONV_IS_LAST; |
d64b6ad0 | 49 | data.__statep = ps ?: &state; |
6dbe2837 | 50 | |
96310297 RM |
51 | /* Get the conversion functions. */ |
52 | fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE)); | |
30de3b18 | 53 | |
d64b6ad0 | 54 | /* Get the structure with the function pointers. */ |
96310297 | 55 | tomb = fcts->tomb; |
915a6c51 | 56 | __gconv_fct fct = tomb->__fct; |
915a6c51 UD |
57 | if (tomb->__shlib_handle != NULL) |
58 | PTR_DEMANGLE (fct); | |
d64b6ad0 | 59 | |
4bca4c17 UD |
60 | /* We have to handle DST == NULL special. */ |
61 | if (dst == NULL) | |
30de3b18 | 62 | { |
6a07e1f8 | 63 | mbstate_t temp_state; |
b117f744 | 64 | unsigned char buf[256]; /* Just an arbitrary value. */ |
8619129f | 65 | const wchar_t *srcend = *src + __wcslen (*src) + 1; |
9c7ff11a | 66 | const unsigned char *inbuf = (const unsigned char *) *src; |
23f0c99c | 67 | size_t dummy; |
f4017d20 | 68 | |
6a07e1f8 UD |
69 | temp_state = *data.__statep; |
70 | data.__statep = &temp_state; | |
71 | ||
23f0c99c | 72 | result = 0; |
d64b6ad0 | 73 | data.__outbufend = buf + sizeof (buf); |
07a4742f | 74 | |
4bca4c17 | 75 | do |
d079f321 | 76 | { |
d64b6ad0 | 77 | data.__outbuf = buf; |
d079f321 | 78 | |
915a6c51 UD |
79 | status = DL_CALL_FCT (fct, (tomb, &data, &inbuf, |
80 | (const unsigned char *) srcend, NULL, | |
81 | &dummy, 0, 1)); | |
23f0c99c UD |
82 | |
83 | /* Count the number of bytes. */ | |
d64b6ad0 | 84 | result += data.__outbuf - buf; |
d079f321 | 85 | } |
d64b6ad0 | 86 | while (status == __GCONV_FULL_OUTPUT); |
30de3b18 | 87 | |
d64b6ad0 | 88 | if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
d079f321 UD |
89 | { |
90 | /* There better should be a NUL byte at the end. */ | |
d64b6ad0 | 91 | assert (data.__outbuf[-1] == '\0'); |
d079f321 UD |
92 | /* Don't count the NUL character in. */ |
93 | --result; | |
94 | } | |
4bca4c17 UD |
95 | } |
96 | else | |
97 | { | |
98 | /* This code is based on the safe assumption that all internal | |
99 | multi-byte encodings use the NUL byte only to mark the end | |
100 | of the string. */ | |
b8a423c2 | 101 | const wchar_t *srcend = *src + __wcsnlen (*src, len) + 1; |
23f0c99c | 102 | size_t dummy; |
4bca4c17 | 103 | |
1c99f950 UD |
104 | data.__outbuf = (unsigned char *) dst; |
105 | data.__outbufend = (unsigned char *) dst + len; | |
4bca4c17 | 106 | |
915a6c51 UD |
107 | status = DL_CALL_FCT (fct, (tomb, &data, (const unsigned char **) src, |
108 | (const unsigned char *) srcend, NULL, | |
109 | &dummy, 0, 1)); | |
23f0c99c UD |
110 | |
111 | /* Count the number of bytes. */ | |
d64b6ad0 | 112 | result = data.__outbuf - (unsigned char *) dst; |
4bca4c17 UD |
113 | |
114 | /* We have to determine whether the last character converted | |
115 | is the NUL character. */ | |
376b8b3d | 116 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
d64b6ad0 | 117 | && data.__outbuf[-1] == '\0') |
07a4742f | 118 | { |
d64b6ad0 UD |
119 | assert (data.__outbuf != (unsigned char *) dst); |
120 | assert (__mbsinit (data.__statep)); | |
07a4742f | 121 | *src = NULL; |
4bca4c17 | 122 | --result; |
07a4742f | 123 | } |
30de3b18 RM |
124 | } |
125 | ||
4bca4c17 UD |
126 | /* There must not be any problems with the conversion but illegal input |
127 | characters. */ | |
d64b6ad0 UD |
128 | assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT |
129 | || status == __GCONV_ILLEGAL_INPUT | |
130 | || status == __GCONV_INCOMPLETE_INPUT | |
131 | || status == __GCONV_FULL_OUTPUT); | |
07a4742f | 132 | |
d64b6ad0 UD |
133 | if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT |
134 | && status != __GCONV_EMPTY_INPUT) | |
4bca4c17 UD |
135 | { |
136 | result = (size_t) -1; | |
137 | __set_errno (EILSEQ); | |
138 | } | |
f4017d20 | 139 | |
4bca4c17 | 140 | return result; |
30de3b18 | 141 | } |
23396375 | 142 | weak_alias (__wcsrtombs, wcsrtombs) |