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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. |
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/>. */ | |
30de3b18 | 18 | |
915a6c51 | 19 | #include <assert.h> |
55985355 | 20 | #include <dlfcn.h> |
30de3b18 | 21 | #include <errno.h> |
4bca4c17 UD |
22 | #include <stdlib.h> |
23 | #include <gconv.h> | |
30de3b18 | 24 | #include <wchar.h> |
4bca4c17 UD |
25 | #include <wcsmbsload.h> |
26 | ||
915a6c51 | 27 | #include <sysdep.h> |
30de3b18 | 28 | |
80bcb410 | 29 | #ifndef EILSEQ |
4bca4c17 | 30 | # define EILSEQ EINVAL |
80bcb410 RM |
31 | #endif |
32 | ||
30de3b18 | 33 | |
4bca4c17 UD |
34 | /* This is the private state used if PS is NULL. */ |
35 | static mbstate_t state; | |
6dbe2837 | 36 | |
30de3b18 | 37 | size_t |
9dd346ff | 38 | __wcsrtombs (char *dst, const wchar_t **src, size_t len, mbstate_t *ps) |
30de3b18 | 39 | { |
d64b6ad0 | 40 | struct __gconv_step_data data; |
4bca4c17 | 41 | int status; |
23f0c99c | 42 | size_t result; |
d64b6ad0 | 43 | struct __gconv_step *tomb; |
96310297 | 44 | const struct gconv_fcts *fcts; |
30de3b18 | 45 | |
4bca4c17 | 46 | /* Tell where we want the result. */ |
d64b6ad0 UD |
47 | data.__invocation_counter = 0; |
48 | data.__internal_use = 1; | |
85830c4c | 49 | data.__flags = __GCONV_IS_LAST; |
d64b6ad0 | 50 | data.__statep = ps ?: &state; |
6dbe2837 | 51 | |
96310297 RM |
52 | /* Get the conversion functions. */ |
53 | fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE)); | |
30de3b18 | 54 | |
d64b6ad0 | 55 | /* Get the structure with the function pointers. */ |
96310297 | 56 | tomb = fcts->tomb; |
915a6c51 UD |
57 | __gconv_fct fct = tomb->__fct; |
58 | #ifdef PTR_DEMANGLE | |
59 | if (tomb->__shlib_handle != NULL) | |
60 | PTR_DEMANGLE (fct); | |
61 | #endif | |
d64b6ad0 | 62 | |
4bca4c17 UD |
63 | /* We have to handle DST == NULL special. */ |
64 | if (dst == NULL) | |
30de3b18 | 65 | { |
6a07e1f8 | 66 | mbstate_t temp_state; |
b117f744 | 67 | unsigned char buf[256]; /* Just an arbitrary value. */ |
8619129f | 68 | const wchar_t *srcend = *src + __wcslen (*src) + 1; |
9c7ff11a | 69 | const unsigned char *inbuf = (const unsigned char *) *src; |
23f0c99c | 70 | size_t dummy; |
f4017d20 | 71 | |
6a07e1f8 UD |
72 | temp_state = *data.__statep; |
73 | data.__statep = &temp_state; | |
74 | ||
23f0c99c | 75 | result = 0; |
d64b6ad0 | 76 | data.__outbufend = buf + sizeof (buf); |
07a4742f | 77 | |
4bca4c17 | 78 | do |
d079f321 | 79 | { |
d64b6ad0 | 80 | data.__outbuf = buf; |
d079f321 | 81 | |
915a6c51 UD |
82 | status = DL_CALL_FCT (fct, (tomb, &data, &inbuf, |
83 | (const unsigned char *) srcend, NULL, | |
84 | &dummy, 0, 1)); | |
23f0c99c UD |
85 | |
86 | /* Count the number of bytes. */ | |
d64b6ad0 | 87 | result += data.__outbuf - buf; |
d079f321 | 88 | } |
d64b6ad0 | 89 | while (status == __GCONV_FULL_OUTPUT); |
30de3b18 | 90 | |
d64b6ad0 | 91 | if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
d079f321 UD |
92 | { |
93 | /* There better should be a NUL byte at the end. */ | |
d64b6ad0 | 94 | assert (data.__outbuf[-1] == '\0'); |
d079f321 UD |
95 | /* Don't count the NUL character in. */ |
96 | --result; | |
97 | } | |
4bca4c17 UD |
98 | } |
99 | else | |
100 | { | |
101 | /* This code is based on the safe assumption that all internal | |
102 | multi-byte encodings use the NUL byte only to mark the end | |
103 | of the string. */ | |
b8a423c2 | 104 | const wchar_t *srcend = *src + __wcsnlen (*src, len) + 1; |
23f0c99c | 105 | size_t dummy; |
4bca4c17 | 106 | |
1c99f950 UD |
107 | data.__outbuf = (unsigned char *) dst; |
108 | data.__outbufend = (unsigned char *) dst + len; | |
4bca4c17 | 109 | |
915a6c51 UD |
110 | status = DL_CALL_FCT (fct, (tomb, &data, (const unsigned char **) src, |
111 | (const unsigned char *) srcend, NULL, | |
112 | &dummy, 0, 1)); | |
23f0c99c UD |
113 | |
114 | /* Count the number of bytes. */ | |
d64b6ad0 | 115 | result = data.__outbuf - (unsigned char *) dst; |
4bca4c17 UD |
116 | |
117 | /* We have to determine whether the last character converted | |
118 | is the NUL character. */ | |
376b8b3d | 119 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
d64b6ad0 | 120 | && data.__outbuf[-1] == '\0') |
07a4742f | 121 | { |
d64b6ad0 UD |
122 | assert (data.__outbuf != (unsigned char *) dst); |
123 | assert (__mbsinit (data.__statep)); | |
07a4742f | 124 | *src = NULL; |
4bca4c17 | 125 | --result; |
07a4742f | 126 | } |
30de3b18 RM |
127 | } |
128 | ||
4bca4c17 UD |
129 | /* There must not be any problems with the conversion but illegal input |
130 | characters. */ | |
d64b6ad0 UD |
131 | assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT |
132 | || status == __GCONV_ILLEGAL_INPUT | |
133 | || status == __GCONV_INCOMPLETE_INPUT | |
134 | || status == __GCONV_FULL_OUTPUT); | |
07a4742f | 135 | |
d64b6ad0 UD |
136 | if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT |
137 | && status != __GCONV_EMPTY_INPUT) | |
4bca4c17 UD |
138 | { |
139 | result = (size_t) -1; | |
140 | __set_errno (EILSEQ); | |
141 | } | |
f4017d20 | 142 | |
4bca4c17 | 143 | return result; |
30de3b18 | 144 | } |
23396375 | 145 | weak_alias (__wcsrtombs, wcsrtombs) |