/src/augeas/gnulib/lib/mbrtowc.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* Convert multibyte character to wide character. |
2 | | Copyright (C) 1999-2002, 2005-2022 Free Software Foundation, Inc. |
3 | | Written by Bruno Haible <bruno@clisp.org>, 2008. |
4 | | |
5 | | This file is free software: you can redistribute it and/or modify |
6 | | it under the terms of the GNU Lesser General Public License as |
7 | | published by the Free Software Foundation; either version 2.1 of the |
8 | | License, or (at your option) any later version. |
9 | | |
10 | | This file 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 |
13 | | GNU Lesser General Public License for more details. |
14 | | |
15 | | You should have received a copy of the GNU Lesser General Public License |
16 | | along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
17 | | |
18 | | #include <config.h> |
19 | | |
20 | | /* Specification. */ |
21 | | #include <wchar.h> |
22 | | |
23 | | #if GNULIB_defined_mbstate_t |
24 | | /* Implement mbrtowc() on top of mbtowc() for the non-UTF-8 locales |
25 | | and directly for the UTF-8 locales. */ |
26 | | |
27 | | # include <errno.h> |
28 | | # include <stdint.h> |
29 | | # include <stdlib.h> |
30 | | |
31 | | # if defined _WIN32 && !defined __CYGWIN__ |
32 | | |
33 | | # define WIN32_LEAN_AND_MEAN /* avoid including junk */ |
34 | | # include <windows.h> |
35 | | |
36 | | # elif HAVE_PTHREAD_API |
37 | | |
38 | | # include <pthread.h> |
39 | | # if HAVE_THREADS_H && HAVE_WEAK_SYMBOLS |
40 | | # include <threads.h> |
41 | | # pragma weak thrd_exit |
42 | | # define c11_threads_in_use() (thrd_exit != NULL) |
43 | | # else |
44 | | # define c11_threads_in_use() 0 |
45 | | # endif |
46 | | |
47 | | # elif HAVE_THREADS_H |
48 | | |
49 | | # include <threads.h> |
50 | | |
51 | | # endif |
52 | | |
53 | | # include "attribute.h" |
54 | | # include "lc-charset-dispatch.h" |
55 | | # include "mbtowc-lock.h" |
56 | | |
57 | | static_assert (sizeof (mbstate_t) >= 4); |
58 | | static char internal_state[4]; |
59 | | |
60 | | size_t |
61 | | mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps) |
62 | | { |
63 | | # define FITS_IN_CHAR_TYPE(wc) ((wc) <= WCHAR_MAX) |
64 | | # include "mbrtowc-impl.h" |
65 | | } |
66 | | |
67 | | #else |
68 | | /* Override the system's mbrtowc() function. */ |
69 | | |
70 | | # if MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ |
71 | | # include "hard-locale.h" |
72 | | # include <locale.h> |
73 | | # endif |
74 | | |
75 | | # undef mbrtowc |
76 | | |
77 | | size_t |
78 | | rpl_mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps) |
79 | 0 | { |
80 | 0 | size_t ret; |
81 | 0 | wchar_t wc; |
82 | |
|
83 | | # if MBRTOWC_NULL_ARG2_BUG || MBRTOWC_RETVAL_BUG || MBRTOWC_EMPTY_INPUT_BUG |
84 | | if (s == NULL) |
85 | | { |
86 | | pwc = NULL; |
87 | | s = ""; |
88 | | n = 1; |
89 | | } |
90 | | # endif |
91 | |
|
92 | | # if MBRTOWC_EMPTY_INPUT_BUG |
93 | | if (n == 0) |
94 | | return (size_t) -2; |
95 | | # endif |
96 | |
|
97 | 0 | if (! pwc) |
98 | 0 | pwc = &wc; |
99 | |
|
100 | | # if MBRTOWC_RETVAL_BUG |
101 | | { |
102 | | static mbstate_t internal_state; |
103 | | |
104 | | /* Override mbrtowc's internal state. We cannot call mbsinit() on the |
105 | | hidden internal state, but we can call it on our variable. */ |
106 | | if (ps == NULL) |
107 | | ps = &internal_state; |
108 | | |
109 | | if (!mbsinit (ps)) |
110 | | { |
111 | | /* Parse the rest of the multibyte character byte for byte. */ |
112 | | size_t count = 0; |
113 | | for (; n > 0; s++, n--) |
114 | | { |
115 | | ret = mbrtowc (&wc, s, 1, ps); |
116 | | |
117 | | if (ret == (size_t)(-1)) |
118 | | return (size_t)(-1); |
119 | | count++; |
120 | | if (ret != (size_t)(-2)) |
121 | | { |
122 | | /* The multibyte character has been completed. */ |
123 | | *pwc = wc; |
124 | | return (wc == 0 ? 0 : count); |
125 | | } |
126 | | } |
127 | | return (size_t)(-2); |
128 | | } |
129 | | } |
130 | | # endif |
131 | |
|
132 | | # if MBRTOWC_STORES_INCOMPLETE_BUG |
133 | | ret = mbrtowc (&wc, s, n, ps); |
134 | | if (ret < (size_t) -2 && pwc != NULL) |
135 | | *pwc = wc; |
136 | | # else |
137 | 0 | ret = mbrtowc (pwc, s, n, ps); |
138 | 0 | # endif |
139 | |
|
140 | | # if MBRTOWC_NUL_RETVAL_BUG |
141 | | if (ret < (size_t) -2 && !*pwc) |
142 | | return 0; |
143 | | # endif |
144 | |
|
145 | 0 | # if MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ |
146 | 0 | if ((size_t) -2 <= ret && n != 0 && ! hard_locale (LC_CTYPE)) |
147 | 0 | { |
148 | 0 | unsigned char uc = *s; |
149 | 0 | *pwc = uc; |
150 | 0 | return 1; |
151 | 0 | } |
152 | 0 | # endif |
153 | | |
154 | 0 | return ret; |
155 | 0 | } |
156 | | |
157 | | #endif |