/*
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* Copyright (C) 2014 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#pragma once
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/**
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* @file stdio_ext.h
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* @brief Extra standard I/O functionality. See also `<stdio.h>`.
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*/
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#include <sys/cdefs.h>
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#include <stdio.h>
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__BEGIN_DECLS
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/**
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* [__fbufsize(3)](http://man7.org/linux/man-pages/man3/__fbufsize.3.html) returns the size of
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* the stream's buffer.
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*
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* Available since API level 23.
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*/
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size_t __fbufsize(FILE* __fp) __INTRODUCED_IN(23);
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/**
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* [__freadable(3)](http://man7.org/linux/man-pages/man3/__freadable.3.html) returns non-zero if
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* the stream allows reading, 0 otherwise.
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*
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* Available since API level 23.
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*/
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int __freadable(FILE* __fp) __INTRODUCED_IN(23);
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/**
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* [__freading(3)](http://man7.org/linux/man-pages/man3/__freading.3.html) returns non-zero if
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* the stream's last operation was a read, 0 otherwise.
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*
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* Available since API level 28.
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*/
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int __freading(FILE* __fp) __INTRODUCED_IN(28);
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/**
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* [__fwritable(3)](http://man7.org/linux/man-pages/man3/__fwritable.3.html) returns non-zero if
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* the stream allows writing, 0 otherwise.
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*
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* Available since API level 23.
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*/
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int __fwritable(FILE* __fp) __INTRODUCED_IN(23);
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/**
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* [__fwriting(3)](http://man7.org/linux/man-pages/man3/__fwriting.3.html) returns non-zero if
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* the stream's last operation was a write, 0 otherwise.
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*
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* Available since API level 28.
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*/
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int __fwriting(FILE* __fp) __INTRODUCED_IN(28);
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/**
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* [__flbf(3)](http://man7.org/linux/man-pages/man3/__flbf.3.html) returns non-zero if
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* the stream is line-buffered, 0 otherwise.
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*
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* Available since API level 23.
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*/
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int __flbf(FILE* __fp) __INTRODUCED_IN(23);
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/**
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* [__fpurge(3)](http://man7.org/linux/man-pages/man3/__fpurge.3.html) discards the contents of
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* the stream's buffer.
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*
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* Available since API level 23.
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*/
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void __fpurge(FILE* __fp) __INTRODUCED_IN(23);
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/**
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* [__fpending(3)](http://man7.org/linux/man-pages/man3/__fpending.3.html) returns the number of
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* bytes in the output buffer.
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*
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* Available since API level 23.
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*/
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size_t __fpending(FILE* __fp) __INTRODUCED_IN(23);
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/**
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* [_flushlbf(3)](http://man7.org/linux/man-pages/man3/_flushlbf.3.html) flushes all
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* line-buffered streams.
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*
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* Available since API level 23.
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*/
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void _flushlbf(void) __INTRODUCED_IN(23);
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/**
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* `__fseterr` sets the
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* stream's error flag (as tested by ferror() and cleared by fclearerr()).
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*
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* Available since API level 28.
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*/
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void __fseterr(FILE* __fp) __INTRODUCED_IN(28);
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/** __fsetlocking() constant to query locking type. */
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#define FSETLOCKING_QUERY 0
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/** __fsetlocking() constant to set locking to be maintained by stdio. */
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#define FSETLOCKING_INTERNAL 1
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/** __fsetlocking() constant to set locking to be maintained by the caller. */
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#define FSETLOCKING_BYCALLER 2
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/**
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* [__fsetlocking(3)](http://man7.org/linux/man-pages/man3/__fsetlocking.3.html) sets the
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* stream's locking mode to one of the `FSETLOCKING_` types.
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*
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* Returns the current locking style, `FSETLOCKING_INTERNAL` or `FSETLOCKING_BYCALLER`.
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*
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* Available since API level 23.
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*/
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int __fsetlocking(FILE* __fp, int __type) __INTRODUCED_IN(23);
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__END_DECLS
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