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bfff8b1b | 1 | /* Copyright (C) 1993-2017 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 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://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 | ||
4aebaa6b UD |
31 | #ifdef _LIBC |
32 | # define wmemcpy __wmemcpy | |
33 | #endif | |
34 | ||
d64b6ad0 | 35 | _IO_size_t |
f63f2bfd JM |
36 | _IO_getwline (_IO_FILE *fp, wchar_t *buf, _IO_size_t n, wint_t delim, |
37 | int extract_delim) | |
d64b6ad0 UD |
38 | { |
39 | return _IO_getwline_info (fp, buf, n, delim, extract_delim, (wint_t *) 0); | |
40 | } | |
41 | ||
42 | /* Algorithm based on that used by Berkeley pre-4.4 fgets implementation. | |
43 | ||
44 | Read chars into buf (of size n), until delim is seen. | |
45 | Return number of chars read (at most n). | |
46 | Does not put a terminating '\0' in buf. | |
47 | If extract_delim < 0, leave delimiter unread. | |
48 | If extract_delim > 0, insert delim in output. */ | |
49 | ||
50 | _IO_size_t | |
f63f2bfd JM |
51 | _IO_getwline_info (_IO_FILE *fp, wchar_t *buf, _IO_size_t n, wint_t delim, |
52 | int extract_delim, wint_t *eof) | |
d64b6ad0 UD |
53 | { |
54 | wchar_t *ptr = buf; | |
55 | if (eof != NULL) | |
56 | *eof = 0; | |
076bfcf6 UD |
57 | if (__builtin_expect (fp->_mode, 1) == 0) |
58 | _IO_fwide (fp, 1); | |
d64b6ad0 UD |
59 | while (n != 0) |
60 | { | |
61 | _IO_ssize_t len = (fp->_wide_data->_IO_read_end | |
62 | - fp->_wide_data->_IO_read_ptr); | |
63 | if (len <= 0) | |
64 | { | |
65 | wint_t wc = __wuflow (fp); | |
66 | if (wc == WEOF) | |
67 | { | |
68 | if (eof) | |
69 | *eof = wc; | |
70 | break; | |
71 | } | |
72 | if (wc == delim) | |
73 | { | |
74 | if (extract_delim > 0) | |
75 | *ptr++ = wc; | |
76 | else if (extract_delim < 0) | |
d18ea0c5 | 77 | _IO_sputbackc (fp, wc); |
d64b6ad0 UD |
78 | if (extract_delim > 0) |
79 | ++len; | |
b5352f2d | 80 | return ptr - buf; |
d64b6ad0 UD |
81 | } |
82 | *ptr++ = wc; | |
83 | n--; | |
84 | } | |
a3b231b7 UD |
85 | else |
86 | { | |
87 | wchar_t *t; | |
88 | if ((_IO_size_t) len >= n) | |
89 | len = n; | |
90 | t = wmemchr ((void *) fp->_wide_data->_IO_read_ptr, delim, len); | |
91 | if (t != NULL) | |
92 | { | |
93 | _IO_size_t old_len = ptr - buf; | |
94 | len = t - fp->_wide_data->_IO_read_ptr; | |
95 | if (extract_delim >= 0) | |
96 | { | |
97 | ++t; | |
98 | if (extract_delim > 0) | |
99 | ++len; | |
100 | } | |
101 | wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr, | |
102 | len); | |
103 | fp->_wide_data->_IO_read_ptr = t; | |
104 | return old_len + len; | |
105 | } | |
106 | wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr, len); | |
107 | fp->_wide_data->_IO_read_ptr += len; | |
108 | ptr += len; | |
109 | n -= len; | |
110 | } | |
d64b6ad0 UD |
111 | } |
112 | return ptr - buf; | |
113 | } |