1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/* Convert string to wide string.
Copyright (C) 2008-2020 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2008.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
size_t
FUNC (DCHAR_T *dest, const char **srcp, size_t len, mbstate_t *ps)
{
if (ps == NULL)
ps = &INTERNAL_STATE;
{
const char *src = *srcp;
if (dest != NULL)
{
DCHAR_T *destptr = dest;
for (; len > 0; destptr++, len--)
{
size_t src_avail;
size_t ret;
/* An optimized variant of
src_avail = strnlen1 (src, MB_LEN_MAX); */
if (src[0] == '\0')
src_avail = 1;
else if (src[1] == '\0')
src_avail = 2;
else if (src[2] == '\0')
src_avail = 3;
else if (MB_LEN_MAX <= 4 || src[3] == '\0')
src_avail = 4;
else
src_avail = 4 + strnlen1 (src + 4, MB_LEN_MAX - 4);
/* Parse the next multibyte character. */
ret = MBRTOWC (destptr, src, src_avail, ps);
if (ret == (size_t)(-2))
/* Encountered a multibyte character that extends past a '\0' byte
or that is longer than MB_LEN_MAX bytes. Cannot happen. */
abort ();
if (ret == (size_t)(-1))
goto bad_input;
if (ret == 0)
{
src = NULL;
/* Here mbsinit (ps). */
break;
}
src += ret;
}
*srcp = src;
return destptr - dest;
}
else
{
/* Ignore dest and len, don't store *srcp at the end, and
don't clobber *ps. */
mbstate_t state = *ps;
size_t totalcount = 0;
for (;; totalcount++)
{
size_t src_avail;
size_t ret;
/* An optimized variant of
src_avail = strnlen1 (src, MB_LEN_MAX); */
if (src[0] == '\0')
src_avail = 1;
else if (src[1] == '\0')
src_avail = 2;
else if (src[2] == '\0')
src_avail = 3;
else if (MB_LEN_MAX <= 4 || src[3] == '\0')
src_avail = 4;
else
src_avail = 4 + strnlen1 (src + 4, MB_LEN_MAX - 4);
/* Parse the next multibyte character. */
ret = MBRTOWC (NULL, src, src_avail, &state);
if (ret == (size_t)(-2))
/* Encountered a multibyte character that extends past a '\0' byte
or that is longer than MB_LEN_MAX bytes. Cannot happen. */
abort ();
if (ret == (size_t)(-1))
goto bad_input2;
if (ret == 0)
{
/* Here mbsinit (&state). */
break;
}
src += ret;
}
return totalcount;
}
bad_input:
*srcp = src;
bad_input2:
errno = EILSEQ;
return (size_t)(-1);
}
}
|
