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
31 #include <errno.h>
32 #include <stdlib.h>
33
34 #include "local.h"
35 #include "private/libc_logging.h"
36
__fbufsize(FILE * fp)37 size_t __fbufsize(FILE* fp) {
38 return fp->_bf._size;
39 }
40
41 /* For a _SRW stream, we don't know whether we last read or wrote.
42 int __freading(FILE* fp) {
43 return (fp->_flags & _SRD) != 0 || ...;
44 }
45 */
46
47 /* For a _SRW stream, we don't know whether we last read or wrote.
48 int __fwriting(FILE*) {
49 return (fp->_flags & _SWR) != 0 || ...;
50 }
51 */
52
__freadable(FILE * fp)53 int __freadable(FILE* fp) {
54 return (fp->_flags & (__SRD|__SRW)) != 0;
55 }
56
__fwritable(FILE * fp)57 int __fwritable(FILE* fp) {
58 return (fp->_flags & (__SWR|__SRW)) != 0;
59 }
60
__flbf(FILE * fp)61 int __flbf(FILE* fp) {
62 return (fp->_flags & __SLBF) != 0;
63 }
64
__fpurge(FILE * fp)65 void __fpurge(FILE* fp) {
66 fpurge(fp);
67 }
68
__fpending(FILE * fp)69 size_t __fpending(FILE* fp) {
70 return fp->_p - fp->_bf._base;
71 }
72
_flushlbf()73 void _flushlbf() {
74 // If we flush all streams, we know we've flushed all the line-buffered streams.
75 fflush(NULL);
76 }
77
__fsetlocking(FILE * fp,int type)78 int __fsetlocking(FILE* fp, int type) {
79 int old_state = _EXT(fp)->_caller_handles_locking ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL;
80 if (type == FSETLOCKING_QUERY) {
81 return old_state;
82 }
83
84 if (type != FSETLOCKING_INTERNAL && type != FSETLOCKING_BYCALLER) {
85 // The API doesn't let us report an error, so blow up.
86 __libc_fatal("Bad type (%d) passed to __fsetlocking", type);
87 }
88
89 _EXT(fp)->_caller_handles_locking = (type == FSETLOCKING_BYCALLER);
90 return old_state;
91 }
92
clearerr_unlocked(FILE * fp)93 void clearerr_unlocked(FILE* fp) {
94 return __sclearerr(fp);
95 }
96
feof_unlocked(FILE * fp)97 int feof_unlocked(FILE* fp) {
98 return __sfeof(fp);
99 }
100
ferror_unlocked(FILE * fp)101 int ferror_unlocked(FILE* fp) {
102 return __sferror(fp);
103 }
104
fileno_unlocked(FILE * fp)105 int fileno_unlocked(FILE* fp) {
106 int fd = fp->_file;
107 if (fd == -1) {
108 errno = EBADF;
109 return -1;
110 }
111 return fd;
112 }
113