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Annotation of 3BSD/lib/libNS/ftell.c, revision 1.1.1.1

1.1       root        1: /* Copyright (c) 1979 Regents of the University of California */
                      2: #include       <stdio.h>
                      3: 
                      4: /*
                      5:  * Return file offset.
                      6:  * Coordinates with buffering.
                      7:  */
                      8: 
                      9: long   tell();
                     10: 
                     11: long ftell(iop)
                     12: register FILE *iop;
                     13: {
                     14:        long tres;
                     15:        register adjust;
                     16: 
                     17:        if (iop->_cnt < 0)
                     18:                iop->_cnt = 0;
                     19:        if (!(iop->_flag & (_IOREAD|_IOWRT)))
                     20:                _error("ftell\n");
                     21:        tres = tell(fileno(iop));
                     22:        if (tres<0)
                     23:                return(tres);
                     24:        return(tres - iop->_delta + iop->_ptr - iop->_base);
                     25: }

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