1 /* Begin include file stdiom.h */
 2 /*        @(#)stdiom.h        1.1       */
 3 
 4 /* The following macros improve performance of the stdio by reducing the
 5           number of calls to _bufsync and _wrtchk.  _BUFSYNC has the same
 6           effect as _bufsync, and _WRTCHK has the same effect as _wrtchk,
 7           but often these functions have no effect, and in those cases the
 8           macros avoid the expense of calling the functions.  */
 9 
10 #define _BUFSYNC(iop)         if (_bufend(iop) - iop->_ptr <   \
11                                         ( iop->_cnt < 0 ? 0 : iop->_cnt ) )  \
12                                                   _bufsync(iop)
13 #define _WRTCHK(iop)          ((((iop->_flag & (_IOWRT | _IOEOF)) != _IOWRT) \
14                                         || (iop->_base == NULL)  \
15                                         || (iop->_ptr == iop->_base && iop->_cnt == 0 \
16                                                   && !(iop->_flag & (_IONBF | _IOLBF)))) \
17                               ? _wrtchk(iop) : 0 )
18 
19 /* End include file stdiom.h */