1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <stdio_ext.h>
30 #include <stdlib.h>
31
32 #include "local.h"
33 #include "private/libc_logging.h"
34
__fbufsize(FILE * fp)35 size_t __fbufsize(FILE* fp) {
36 return fp->_bf._size;
37 }
38
39 /* For a _SRW stream, we don't know whether we last read or wrote.
40 int __freading(FILE* fp) {
41 return (fp->_flags & _SRD) != 0 || ...;
42 }
43 */
44
45 /* For a _SRW stream, we don't know whether we last read or wrote.
46 int __fwriting(FILE*) {
47 return (fp->_flags & _SWR) != 0 || ...;
48 }
49 */
50
__freadable(FILE * fp)51 int __freadable(FILE* fp) {
52 return (fp->_flags & (__SRD|__SRW)) != 0;
53 }
54
__fwritable(FILE * fp)55 int __fwritable(FILE* fp) {
56 return (fp->_flags & (__SWR|__SRW)) != 0;
57 }
58
__flbf(FILE * fp)59 int __flbf(FILE* fp) {
60 return (fp->_flags & __SLBF) != 0;
61 }
62
__fpurge(FILE * fp)63 void __fpurge(FILE* fp) {
64 fpurge(fp);
65 }
66
__fpending(FILE * fp)67 size_t __fpending(FILE* fp) {
68 return fp->_p - fp->_bf._base;
69 }
70
_flushlbf()71 void _flushlbf() {
72 // If we flush all streams, we know we've flushed all the line-buffered streams.
73 fflush(NULL);
74 }
75
__fsetlocking(FILE * fp,int type)76 int __fsetlocking(FILE* fp, int type) {
77 int old_state = _EXT(fp)->_stdio_handles_locking ? FSETLOCKING_INTERNAL : FSETLOCKING_BYCALLER;
78 if (type == FSETLOCKING_QUERY) {
79 return old_state;
80 }
81
82 if (type != FSETLOCKING_INTERNAL && type != FSETLOCKING_BYCALLER) {
83 // The API doesn't let us report an error, so blow up.
84 __libc_fatal("Bad type (%d) passed to __fsetlocking", type);
85 }
86
87 _EXT(fp)->_stdio_handles_locking = (type == FSETLOCKING_INTERNAL);
88 return old_state;
89 }
90
clearerr_unlocked(FILE * fp)91 void clearerr_unlocked(FILE* fp) {
92 return __sclearerr(fp);
93 }
94
feof_unlocked(FILE * fp)95 int feof_unlocked(FILE* fp) {
96 return __sfeof(fp);
97 }
98
ferror_unlocked(FILE * fp)99 int ferror_unlocked(FILE* fp) {
100 return __sferror(fp);
101 }
102