Remove include/bits/ipc.h.
[glibc.git] / libio / iogetwline.c
blobb668a77e388b547a80c0c4f4be7bb37a4322054c
1 /* Copyright (C) 1993-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>.
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. */
27 #include "libioP.h"
28 #include <string.h>
29 #include <wchar.h>
31 #ifdef _LIBC
32 # define wmemcpy __wmemcpy
33 #endif
35 _IO_size_t
36 _IO_getwline (fp, buf, n, delim, extract_delim)
37 _IO_FILE *fp;
38 wchar_t *buf;
39 _IO_size_t n;
40 wint_t delim;
41 int extract_delim;
43 return _IO_getwline_info (fp, buf, n, delim, extract_delim, (wint_t *) 0);
46 /* Algorithm based on that used by Berkeley pre-4.4 fgets implementation.
48 Read chars into buf (of size n), until delim is seen.
49 Return number of chars read (at most n).
50 Does not put a terminating '\0' in buf.
51 If extract_delim < 0, leave delimiter unread.
52 If extract_delim > 0, insert delim in output. */
54 _IO_size_t
55 _IO_getwline_info (fp, buf, n, delim, extract_delim, eof)
56 _IO_FILE *fp;
57 wchar_t *buf;
58 _IO_size_t n;
59 wint_t delim;
60 int extract_delim;
61 wint_t *eof;
63 wchar_t *ptr = buf;
64 if (eof != NULL)
65 *eof = 0;
66 if (__builtin_expect (fp->_mode, 1) == 0)
67 _IO_fwide (fp, 1);
68 while (n != 0)
70 _IO_ssize_t len = (fp->_wide_data->_IO_read_end
71 - fp->_wide_data->_IO_read_ptr);
72 if (len <= 0)
74 wint_t wc = __wuflow (fp);
75 if (wc == WEOF)
77 if (eof)
78 *eof = wc;
79 break;
81 if (wc == delim)
83 if (extract_delim > 0)
84 *ptr++ = wc;
85 else if (extract_delim < 0)
86 _IO_sputbackc (fp, wc);
87 if (extract_delim > 0)
88 ++len;
89 return ptr - buf;
91 *ptr++ = wc;
92 n--;
94 else
96 wchar_t *t;
97 if ((_IO_size_t) len >= n)
98 len = n;
99 t = wmemchr ((void *) fp->_wide_data->_IO_read_ptr, delim, len);
100 if (t != NULL)
102 _IO_size_t old_len = ptr - buf;
103 len = t - fp->_wide_data->_IO_read_ptr;
104 if (extract_delim >= 0)
106 ++t;
107 if (extract_delim > 0)
108 ++len;
110 wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr,
111 len);
112 fp->_wide_data->_IO_read_ptr = t;
113 return old_len + len;
115 wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr, len);
116 fp->_wide_data->_IO_read_ptr += len;
117 ptr += len;
118 n -= len;
121 return ptr - buf;