114 lines
2.2 KiB
C
114 lines
2.2 KiB
C
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/*
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FUNCTION
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<<__fbufsize>>, <<__fpending>>, <<__flbf>>, <<__freadable>>, <<__fwritable>> <<__freading>>, <<__fwriting>>,---access internals of FILE structure
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INDEX
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__fbufsize
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INDEX
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__fpending
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INDEX
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__flbf
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INDEX
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__freadable
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INDEX
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__fwritable
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INDEX
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__freading
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INDEX
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__fwriting
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ANSI_SYNOPSIS
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#include <stdio.h>
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#include <stdio_ext.h>
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size_t __fbufsize(FILE *<[fp]>);
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size_t __fpending(FILE *<[fp]>);
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int __flbf(FILE *<[fp]>);
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int __freadable(FILE *<[fp]>);
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int __fwritable(FILE *<[fp]>);
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int __freading(FILE *<[fp]>);
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int __fwriting(FILE *<[fp]>);
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DESCRIPTION
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These functions provides access to the internals of the FILE structure <[fp]>.
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RETURNS
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<<__fbufsize>> returns the number of bytes in the buffer of stream <[fp]>.
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<<__fpending>> returns the number of bytes in the output buffer of stream <[fp]>.
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<<__flbf>> returns nonzero if stream <[fp]> is line-buffered, and <<0>> if not.
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<<__freadable>> returns nonzero if stream <[fp]> may be read, and <<0>> if not.
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<<__fwritable>> returns nonzero if stream <[fp]> may be written, and <<0>> if not.
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<<__freading>> returns nonzero if stream <[fp]> if the last operation on
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it was a read, or if it read-only, and <<0>> if not.
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<<__fwriting>> returns nonzero if stream <[fp]> if the last operation on
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it was a write, or if it write-only, and <<0>> if not.
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PORTABILITY
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These functions originate from Solaris and are also provided by GNU libc.
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No supporting OS subroutines are required.
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*/
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#ifndef __rtems__
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#include <_ansi.h>
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#include <stdio.h>
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/* Subroutine versions of the inline or macro functions. */
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size_t
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_DEFUN(__fbufsize, (fp),
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FILE * fp)
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{
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return (size_t) fp->_bf._size;
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}
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size_t
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_DEFUN(__fpending, (fp),
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FILE * fp)
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{
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return fp->_p - fp->_bf._base;
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}
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int
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_DEFUN(__flbf, (fp),
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FILE * fp)
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{
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return (fp->_flags & __SLBF) != 0;
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}
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int
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_DEFUN(__freadable, (fp),
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FILE * fp)
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{
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return (fp->_flags & (__SRD | __SRW)) != 0;
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}
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int
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_DEFUN(__fwritable, (fp),
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FILE * fp)
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{
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return (fp->_flags & (__SWR | __SRW)) != 0;
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}
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int
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_DEFUN(__freading, (fp),
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FILE * fp)
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{
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return (fp->_flags & __SRD) != 0;
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}
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int
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_DEFUN(__fwriting, (fp),
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FILE * fp)
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{
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return (fp->_flags & __SWR) != 0;
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}
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#endif /* __rtems__ */
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