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 <async_safe/log.h> 35 36 #include "local.h" 37 38 size_t __fbufsize(FILE* fp) { 39 return fp->_bf._size; 40 } 41 42 int __freading(FILE* fp) { 43 return (fp->_flags & __SRD) != 0; 44 } 45 46 int __fwriting(FILE* fp) { 47 return (fp->_flags & __SWR) != 0; 48 } 49 50 int __freadable(FILE* fp) { 51 return (fp->_flags & (__SRD|__SRW)) != 0; 52 } 53 54 int __fwritable(FILE* fp) { 55 return (fp->_flags & (__SWR|__SRW)) != 0; 56 } 57 58 int __flbf(FILE* fp) { 59 return (fp->_flags & __SLBF) != 0; 60 } 61 62 void __fpurge(FILE* fp) { 63 fpurge(fp); 64 } 65 66 size_t __fpending(FILE* fp) { 67 return fp->_p - fp->_bf._base; 68 } 69 70 void _flushlbf() { 71 // If we flush all streams, we know we've flushed all the line-buffered streams. 72 fflush(NULL); 73 } 74 75 void __fseterr(FILE* fp) { 76 fp->_flags |= __SERR; 77 } 78 79 int __fsetlocking(FILE* fp, int type) { 80 int old_state = _EXT(fp)->_caller_handles_locking ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL; 81 if (type == FSETLOCKING_QUERY) { 82 return old_state; 83 } 84 85 if (type != FSETLOCKING_INTERNAL && type != FSETLOCKING_BYCALLER) { 86 // The API doesn't let us report an error, so blow up. 87 async_safe_fatal("Bad type (%d) passed to __fsetlocking", type); 88 } 89 90 _EXT(fp)->_caller_handles_locking = (type == FSETLOCKING_BYCALLER); 91 return old_state; 92 } 93
