/* @(#)stdiom.h 1.1 */ /* The following macros improve performance of the stdio by reducing the number of calls to _bufsync and _wrtchk. _BUFSYNC has the same effect as _bufsync, and _WRTCHK has the same effect as _wrtchk, but often these functions have no effect, and in those cases the macros avoid the expense of calling the functions. */ #define _BUFSYNC(iop) if (_bufend(iop) - iop->_ptr < \ ( iop->_cnt < 0 ? 0 : iop->_cnt ) ) \ _bufsync(iop) #define _WRTCHK(iop) ((((iop->_flag & (_IOWRT | _IOEOF)) != _IOWRT) \ || (iop->_base == NULL) \ || (iop->_ptr == iop->_base && iop->_cnt == 0 \ && !(iop->_flag & (_IONBF | _IOLBF)))) \ ? _wrtchk(iop) : 0 )