]>
Commit | Line | Data |
---|---|---|
581c785b | 1 | /* Copyright (C) 1993-2022 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
d64b6ad0 | 3 | |
41bdb6e2 AJ |
4 | The GNU C Library is free software; you can redistribute it and/or |
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. | |
d64b6ad0 | 8 | |
41bdb6e2 AJ |
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 | |
d64b6ad0 | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 AJ |
12 | Lesser General Public License for more details. |
13 | ||
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/>. |
41bdb6e2 AJ |
17 | |
18 | As a special exception, if you link the code in this file with | |
19 | files compiled with a GNU compiler to produce an executable, | |
20 | that does not cause the resulting executable to be covered by | |
21 | the GNU Lesser General Public License. This exception does not | |
22 | however invalidate any other reasons why the executable file | |
23 | might be covered by the GNU Lesser General Public License. | |
24 | This exception applies to code released by its copyright holders | |
25 | in files containing the exception. */ | |
d64b6ad0 UD |
26 | |
27 | #include "libioP.h" | |
28 | #include <string.h> | |
29 | #include <wchar.h> | |
30 | ||
9964a145 ZW |
31 | size_t |
32 | _IO_getwline (FILE *fp, wchar_t *buf, size_t n, wint_t delim, | |
f63f2bfd | 33 | int extract_delim) |
d64b6ad0 UD |
34 | { |
35 | return _IO_getwline_info (fp, buf, n, delim, extract_delim, (wint_t *) 0); | |
36 | } | |
37 | ||
38 | /* Algorithm based on that used by Berkeley pre-4.4 fgets implementation. | |
39 | ||
40 | Read chars into buf (of size n), until delim is seen. | |
41 | Return number of chars read (at most n). | |
42 | Does not put a terminating '\0' in buf. | |
43 | If extract_delim < 0, leave delimiter unread. | |
44 | If extract_delim > 0, insert delim in output. */ | |
45 | ||
9964a145 ZW |
46 | size_t |
47 | _IO_getwline_info (FILE *fp, wchar_t *buf, size_t n, wint_t delim, | |
f63f2bfd | 48 | int extract_delim, wint_t *eof) |
d64b6ad0 UD |
49 | { |
50 | wchar_t *ptr = buf; | |
51 | if (eof != NULL) | |
52 | *eof = 0; | |
076bfcf6 UD |
53 | if (__builtin_expect (fp->_mode, 1) == 0) |
54 | _IO_fwide (fp, 1); | |
d64b6ad0 UD |
55 | while (n != 0) |
56 | { | |
9964a145 ZW |
57 | ssize_t len = (fp->_wide_data->_IO_read_end |
58 | - fp->_wide_data->_IO_read_ptr); | |
d64b6ad0 UD |
59 | if (len <= 0) |
60 | { | |
61 | wint_t wc = __wuflow (fp); | |
62 | if (wc == WEOF) | |
63 | { | |
64 | if (eof) | |
65 | *eof = wc; | |
66 | break; | |
67 | } | |
68 | if (wc == delim) | |
69 | { | |
70 | if (extract_delim > 0) | |
71 | *ptr++ = wc; | |
72 | else if (extract_delim < 0) | |
d18ea0c5 | 73 | _IO_sputbackc (fp, wc); |
d64b6ad0 UD |
74 | if (extract_delim > 0) |
75 | ++len; | |
b5352f2d | 76 | return ptr - buf; |
d64b6ad0 UD |
77 | } |
78 | *ptr++ = wc; | |
79 | n--; | |
80 | } | |
a3b231b7 UD |
81 | else |
82 | { | |
83 | wchar_t *t; | |
9964a145 | 84 | if ((size_t) len >= n) |
a3b231b7 UD |
85 | len = n; |
86 | t = wmemchr ((void *) fp->_wide_data->_IO_read_ptr, delim, len); | |
87 | if (t != NULL) | |
88 | { | |
9964a145 | 89 | size_t old_len = ptr - buf; |
a3b231b7 UD |
90 | len = t - fp->_wide_data->_IO_read_ptr; |
91 | if (extract_delim >= 0) | |
92 | { | |
93 | ++t; | |
94 | if (extract_delim > 0) | |
95 | ++len; | |
96 | } | |
5f0704b6 FW |
97 | __wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr, |
98 | len); | |
a3b231b7 UD |
99 | fp->_wide_data->_IO_read_ptr = t; |
100 | return old_len + len; | |
101 | } | |
5f0704b6 | 102 | __wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr, len); |
a3b231b7 UD |
103 | fp->_wide_data->_IO_read_ptr += len; |
104 | ptr += len; | |
105 | n -= len; | |
106 | } | |
d64b6ad0 UD |
107 | } |
108 | return ptr - buf; | |
109 | } |