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size_t
__fpending (FILE *fp)
{
#if STREAM_FPENDING_GLIBC2
return fp->_IO_write_ptr - fp->_IO_write_base;
#endif
#if STREAM_FPENDING__PTR
/* Traditional Unix */
return fp->_ptr - fp->_base;
#endif
#if STREAM_FPENDING__P
/* BSD */
return fp->_p - fp->_bf._base;
#endif
#if STREAM_FPENDING__P
/* SCO, Unixware */
return fp->__ptr - fp->__base;
#endif
#if STREAM_FPENDING__BUFP
/* old glibc? */
return fp->__bufp - fp->__buffer;
#endif
#if STREAM_FPENDING__PPTR
/* old glibc iostream? */
return fp->_pptr - fp->_pbase;
#endif
#if STREAM_FPENDING__PTR_DEREF
/* VMS */
return (*fp)->_ptr - (*fp)->_base;
#endif
#if STREAM_FPENDING_NOT_AVAILABLE
/* e.g., DGUX R4.11 */
return 1; /* i.e. the info is not available */
#endif
}
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