source: trunk/libs/newlib/src/newlib/libc/stdio/stdio_ext.c @ 543

/*
FUNCTION
<<stdio_ext>>,<<__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

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
__fbufsize (FILE * fp)
{
  return (size_t) fp->_bf._size;
}

size_t
__fpending (FILE * fp)
{
  return fp->_p - fp->_bf._base;
}

int
__flbf (FILE * fp)
{
  return (fp->_flags & __SLBF) != 0;
}

int
__freadable (FILE * fp)
{
  return (fp->_flags & (__SRD | __SRW)) != 0;
}

int
__fwritable (FILE * fp)
{
  return (fp->_flags & (__SWR | __SRW)) != 0;
}

int
__freading (FILE * fp)
{
  return (fp->_flags & __SRD) != 0;
}

int
__fwriting (FILE * fp)
{
  return (fp->_flags & __SWR) != 0;
}

#endif /* __rtems__ */