1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)fgets.c 8.2 (Berkeley) 12/22/93";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)fgets.c 8.2 (Berkeley) 12/22/93";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
|
37__FBSDID("$FreeBSD: head/lib/libc/stdio/fgets.c 249808 2013-04-23 13:33:13Z emaste $");
| 37__FBSDID("$FreeBSD: head/lib/libc/stdio/fgets.c 249810 2013-04-23 14:36:44Z emaste $");
|
38
39#include "namespace.h"
40#include <stdio.h>
41#include <string.h>
42#include "un-namespace.h"
43#include "local.h"
44#include "libc_private.h"
45
46/*
47 * Read at most n-1 characters from the given file.
48 * Stop when a newline has been read, or the count runs out.
49 * Return first argument, or NULL if no characters were read.
50 */
51char *
| 38
39#include "namespace.h"
40#include <stdio.h>
41#include <string.h>
42#include "un-namespace.h"
43#include "local.h"
44#include "libc_private.h"
45
46/*
47 * Read at most n-1 characters from the given file.
48 * Stop when a newline has been read, or the count runs out.
49 * Return first argument, or NULL if no characters were read.
50 */
51char *
|
52fgets(buf, n, fp)
53 char *buf;
54 int n;
55 FILE *fp;
| 52fgets(char * __restrict buf, int n, FILE * __restrict fp)
|
56{
57 size_t len;
58 char *s;
59 unsigned char *p, *t;
60
61 if (n <= 0) /* sanity check */
62 return (NULL);
63
64 FLOCKFILE(fp);
65 ORIENT(fp, -1);
66 s = buf;
67 n--; /* leave space for NUL */
68 while (n != 0) {
69 /*
70 * If the buffer is empty, refill it.
71 */
72 if ((len = fp->_r) <= 0) {
73 if (__srefill(fp)) {
74 /* EOF/error: stop with partial or no line */
75 if (s == buf) {
76 FUNLOCKFILE(fp);
77 return (NULL);
78 }
79 break;
80 }
81 len = fp->_r;
82 }
83 p = fp->_p;
84
85 /*
86 * Scan through at most n bytes of the current buffer,
87 * looking for '\n'. If found, copy up to and including
88 * newline, and stop. Otherwise, copy entire chunk
89 * and loop.
90 */
91 if (len > n)
92 len = n;
93 t = memchr((void *)p, '\n', len);
94 if (t != NULL) {
95 len = ++t - p;
96 fp->_r -= len;
97 fp->_p = t;
98 (void)memcpy((void *)s, (void *)p, len);
99 s[len] = 0;
100 FUNLOCKFILE(fp);
101 return (buf);
102 }
103 fp->_r -= len;
104 fp->_p += len;
105 (void)memcpy((void *)s, (void *)p, len);
106 s += len;
107 n -= len;
108 }
109 *s = 0;
110 FUNLOCKFILE(fp);
111 return (buf);
112}
| 53{
54 size_t len;
55 char *s;
56 unsigned char *p, *t;
57
58 if (n <= 0) /* sanity check */
59 return (NULL);
60
61 FLOCKFILE(fp);
62 ORIENT(fp, -1);
63 s = buf;
64 n--; /* leave space for NUL */
65 while (n != 0) {
66 /*
67 * If the buffer is empty, refill it.
68 */
69 if ((len = fp->_r) <= 0) {
70 if (__srefill(fp)) {
71 /* EOF/error: stop with partial or no line */
72 if (s == buf) {
73 FUNLOCKFILE(fp);
74 return (NULL);
75 }
76 break;
77 }
78 len = fp->_r;
79 }
80 p = fp->_p;
81
82 /*
83 * Scan through at most n bytes of the current buffer,
84 * looking for '\n'. If found, copy up to and including
85 * newline, and stop. Otherwise, copy entire chunk
86 * and loop.
87 */
88 if (len > n)
89 len = n;
90 t = memchr((void *)p, '\n', len);
91 if (t != NULL) {
92 len = ++t - p;
93 fp->_r -= len;
94 fp->_p = t;
95 (void)memcpy((void *)s, (void *)p, len);
96 s[len] = 0;
97 FUNLOCKFILE(fp);
98 return (buf);
99 }
100 fp->_r -= len;
101 fp->_p += len;
102 (void)memcpy((void *)s, (void *)p, len);
103 s += len;
104 n -= len;
105 }
106 *s = 0;
107 FUNLOCKFILE(fp);
108 return (buf);
109}
|