#include "stdio.h" setbuf(iop, buf) register struct _iobuf *iop; { if (iop->_base != NULL && iop->_flag&_IOMYBUF) free(iop->_base); iop->_flag =& ~(_IOMYBUF|_IONBF); if ((iop->_base = buf) == NULL) iop->_flag =| _IONBF; else iop->_ptr = iop->_base; iop->_cnt = 0; }