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