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d18ea0c5 | 1 | /* Copyright (C) 1993-2012 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
96aa2d94 | 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. | |
96aa2d94 | 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 | |
40a55d20 | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 12 | Lesser General Public License for more details. |
96aa2d94 | 13 | |
41bdb6e2 | 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/>. | |
96aa2d94 | 17 | |
41bdb6e2 AJ |
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. */ | |
96aa2d94 RM |
26 | |
27 | #include "libioP.h" | |
28 | #include <string.h> | |
29 | ||
0a614877 UD |
30 | #if defined _LIBC || !_G_HAVE_IO_GETLINE_INFO |
31 | ||
32 | _IO_size_t | |
33 | _IO_getline (fp, buf, n, delim, extract_delim) | |
34 | _IO_FILE *fp; | |
35 | char *buf; | |
36 | _IO_size_t n; | |
37 | int delim; | |
38 | int extract_delim; | |
39 | { | |
d18ea0c5 | 40 | return _IO_getline_info (fp, buf, n, delim, extract_delim, (int *) 0); |
0a614877 | 41 | } |
d18ea0c5 | 42 | libc_hidden_def (_IO_getline) |
0a614877 | 43 | |
96aa2d94 RM |
44 | /* Algorithm based on that used by Berkeley pre-4.4 fgets implementation. |
45 | ||
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. */ | |
51 | ||
52 | _IO_size_t | |
0a614877 | 53 | _IO_getline_info (fp, buf, n, delim, extract_delim, eof) |
40a55d20 UD |
54 | _IO_FILE *fp; |
55 | char *buf; | |
56 | _IO_size_t n; | |
57 | int delim; | |
58 | int extract_delim; | |
0a614877 | 59 | int *eof; |
96aa2d94 | 60 | { |
40a55d20 | 61 | char *ptr = buf; |
0a614877 UD |
62 | if (eof != NULL) |
63 | *eof = 0; | |
076bfcf6 UD |
64 | if (__builtin_expect (fp->_mode, -1) == 0) |
65 | _IO_fwide (fp, -1); | |
00a2f9aa | 66 | while (n != 0) |
96aa2d94 RM |
67 | { |
68 | _IO_ssize_t len = fp->_IO_read_end - fp->_IO_read_ptr; | |
96aa2d94 | 69 | if (len <= 0) |
96aa2d94 | 70 | { |
0a614877 UD |
71 | int c = __uflow (fp); |
72 | if (c == EOF) | |
96aa2d94 | 73 | { |
b5d839c9 UD |
74 | if (eof) |
75 | *eof = c; | |
0a614877 UD |
76 | break; |
77 | } | |
78 | if (c == delim) | |
79 | { | |
80 | if (extract_delim > 0) | |
81 | *ptr++ = c; | |
82 | else if (extract_delim < 0) | |
d18ea0c5 | 83 | _IO_sputbackc (fp, c); |
96aa2d94 | 84 | if (extract_delim > 0) |
40a55d20 | 85 | ++len; |
8da2915d | 86 | return ptr - buf; |
96aa2d94 | 87 | } |
0a614877 UD |
88 | *ptr++ = c; |
89 | n--; | |
96aa2d94 | 90 | } |
b5d839c9 UD |
91 | else |
92 | { | |
93 | char *t; | |
94 | if ((_IO_size_t) len >= n) | |
95 | len = n; | |
96 | t = (char *) memchr ((void *) fp->_IO_read_ptr, delim, len); | |
97 | if (t != NULL) | |
98 | { | |
99 | _IO_size_t old_len = ptr-buf; | |
100 | len = t - fp->_IO_read_ptr; | |
101 | if (extract_delim >= 0) | |
102 | { | |
103 | ++t; | |
104 | if (extract_delim > 0) | |
105 | ++len; | |
106 | } | |
107 | memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len); | |
108 | fp->_IO_read_ptr = t; | |
109 | return old_len + len; | |
110 | } | |
111 | memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len); | |
112 | fp->_IO_read_ptr += len; | |
113 | ptr += len; | |
114 | n -= len; | |
115 | } | |
08cac4ac | 116 | } |
96aa2d94 RM |
117 | return ptr - buf; |
118 | } | |
d18ea0c5 | 119 | libc_hidden_def (_IO_getline_info) |
0a614877 UD |
120 | |
121 | #endif /* Defined _LIBC || !_G_HAVE_IO_GETLINE_INFO */ |