#include "stdio.h" _filbuf(iop) register struct _iobuf *iop; { static char smallbuf[_NFILE]; if ((iop->_flag&_IOREAD) == 0) _error("Reading bad file\n"); if (iop->_flag&_IOSTRG) return(-1); tryagain: if (iop->_base==NULL) { if (iop->_flag&_IONBF) { iop->_base = &smallbuf[fileno(iop)]; goto tryagain; } if ((iop->_base = malloc(BUFSIZ)) == NULL) { iop->_flag =| _IONBF; goto tryagain; } iop->_flag =| _IOMYBUF; } iop->_ptr = iop->_base; iop->_cnt = read(fileno(iop), iop->_ptr, iop->_flag&_IONBF?1:BUFSIZ); if (--iop->_cnt < 0) { if (iop->_cnt == -1) iop->_flag =| _IOEOF; else iop->_flag =| _IOERR; iop->_cnt = 0; return(-1); } return(*iop->_ptr++&0377); }