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Annotation of xinu/sys/LSI/lfread.c, revision 1.1

1.1     ! root        1: /* lfread.c - lfread */
        !             2: 
        !             3: #include <conf.h>
        !             4: #include <kernel.h>
        !             5: #include <disk.h>
        !             6: #include <lfile.h>
        !             7: #include <dir.h>
        !             8: 
        !             9: /*------------------------------------------------------------------------
        !            10:  *  lfread  --  read from a previously opened disk file
        !            11:  *------------------------------------------------------------------------
        !            12:  */
        !            13: lfread(devptr, buff, count)
        !            14: struct devsw   *devptr;
        !            15: char   *buff;
        !            16: int    count;
        !            17: {
        !            18:        int     done;
        !            19:        int     ichar;
        !            20: 
        !            21:        if (count < 0)
        !            22:                return(SYSERR);
        !            23:        for (done=0 ; done < count ; done++)
        !            24:                if ( (ichar=lfgetc(devptr)) == SYSERR)
        !            25:                        return(SYSERR);
        !            26:                else if (ichar == EOF ) {       /* EOF before finished */
        !            27:                        if (done == 0)
        !            28:                                return(EOF);
        !            29:                        else
        !            30:                                return(done);
        !            31:                } else
        !            32:                        *buff++ = (char) ichar;
        !            33:        return(done);
        !            34: }

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