1 /* Copyright (C) 1993-2012 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. */
30 #if defined _LIBC || !_G_HAVE_IO_GETLINE_INFO
33 _IO_getline (fp, buf, n, delim, extract_delim)
40 return _IO_getline_info (fp, buf, n, delim, extract_delim, (int *) 0);
42 libc_hidden_def (_IO_getline)
44 /* Algorithm based on that used by Berkeley pre-4.4 fgets implementation.
46 Read chars into buf (of size n), until delim is seen.
47 Return number of chars read (at most n).
48 Does not put a terminating '\0' in buf.
49 If extract_delim < 0, leave delimiter unread.
50 If extract_delim > 0, insert delim in output. */
53 _IO_getline_info (fp, buf, n, delim, extract_delim, eof)
64 if (__builtin_expect (fp->_mode, -1) == 0)
68 _IO_ssize_t len = fp->_IO_read_end - fp->_IO_read_ptr;
80 if (extract_delim > 0)
82 else if (extract_delim < 0)
83 _IO_sputbackc (fp, c);
84 if (extract_delim > 0)
94 if ((_IO_size_t) len >= n)
96 t = (char *) memchr ((void *) fp->_IO_read_ptr, delim, len);
99 _IO_size_t old_len = ptr-buf;
100 len = t - fp->_IO_read_ptr;
101 if (extract_delim >= 0)
104 if (extract_delim > 0)
107 memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
108 fp->_IO_read_ptr = t;
109 return old_len + len;
111 memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
112 fp->_IO_read_ptr += len;
119 libc_hidden_def (_IO_getline_info)
121 #endif /* Defined _LIBC || !_G_HAVE_IO_GETLINE_INFO */