1 #ifndef _BABELTRACE_COMPAT_STDIO_H
2 #define _BABELTRACE_COMPAT_STDIO_H
5 * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 #include <babeltrace/assert-internal.h>
32 #define BT_GETLINE_MINBUFLEN 64
35 char * _bt_getline_bufalloc(char **lineptr
, size_t *n
, size_t linelen
)
40 if (buflen
>= linelen
&& buf
!= NULL
) {
44 buflen
= BT_GETLINE_MINBUFLEN
;
47 if (buflen
< BT_GETLINE_MINBUFLEN
) {
48 buflen
= BT_GETLINE_MINBUFLEN
;
51 /* Check below not strictly needed, extra safety. */
52 if (buflen
< linelen
) {
55 buf
= realloc(buf
, buflen
);
66 * Returns line length (including possible final \n, excluding final
67 * \0). On end of file, returns -1 with nonzero feof(stream) and errno
68 * set to 0. On error, returns -1 with errno set.
70 * This interface is similar to the getline(3) man page part of the
71 * Linux man-pages project, release 3.74. One major difference from the
72 * Open Group POSIX specification is that this implementation does not
73 * necessarily set the ferror() flag on error (because it is internal to
77 ssize_t
bt_getline(char **lineptr
, size_t *n
, FILE *stream
)
83 if (lineptr
== NULL
|| n
== NULL
) {
94 /* ferror() is set, errno set by fgetc(). */
97 BT_ASSERT(feof(stream
));
102 if (linelen
== SSIZE_MAX
) {
106 buf
= _bt_getline_bufalloc(lineptr
, n
, ++linelen
);
110 buf
[linelen
- 1] = c
;
115 if (!linelen
&& found_eof
) {
120 buf
= _bt_getline_bufalloc(lineptr
, n
, ++linelen
);
124 buf
[linelen
- 1] = '\0';
125 return linelen
- 1; /* Count don't include final \0. */
128 #endif /* _BABELTRACE_COMPAT_STDIO_H */
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