#include <stdio.h> char *malloc(); int _filbuf(iop) register FILE *iop; { static char smallbuf[_NFILE]; if (iop->_flag & _IORW) iop->_flag |= _IOREAD; if ((iop->_flag & _IOREAD) == 0 || iop->_flag & _IOSTRG) return(EOF); 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; if (iop->_flag & _IORW) iop->_flag &= ~_IOREAD; } else iop->_flag |= _IOERR; iop->_cnt = 0; return(EOF); } return(*iop->_ptr++ & 0377); }