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Annotation of 43BSD/ingres/source/iutil/last_page.c, revision 1.1

1.1     ! root        1: # include      <ingres.h>
        !             2: # include      <access.h>
        !             3: # include      <opsys.h>
        !             4: # include      <sccs.h>
        !             5: 
        !             6: SCCSID(@(#)last_page.c 8.2     1/17/85)
        !             7: 
        !             8: /*
        !             9: **     LAST_PAGE -- computes a tid for the last page in the relation.
        !            10: */
        !            11: 
        !            12: # ifdef xV6_UNIX
        !            13: struct stat
        !            14: {
        !            15:        char    junk[9], size0;
        !            16:        int     size1;
        !            17:        char    junk2[25];
        !            18: };
        !            19: # endif
        !            20: 
        !            21: last_page(d, tid, buf)
        !            22: register DESC          *d;
        !            23: register TID           *tid;
        !            24: register struct accbuf *buf;
        !            25: {
        !            26:        long            lpage;
        !            27:        struct stat     stats;
        !            28: 
        !            29:        if ((buf != 0) && (abs(d->reldum.relspec) == M_HEAP) && (buf->mainpg == 0) && (buf->ovflopg == 0))
        !            30:                lpage = buf->thispage;
        !            31:        else
        !            32:        {
        !            33:                if (fstat(d->relfp, &stats))
        !            34:                        syserr("last_page: fstat err %.14s", d->reldum.relid);
        !            35: #              ifdef xV6_UNIX
        !            36:                /* number of pages in relation - 1 */
        !            37:                lpage = ((stats.size1 >> 9) & 0177) + ((stats.size0 & I1MASK) << 7)- 1;
        !            38: #              else
        !            39:                lpage = stats.st_size / PGSIZE - 1;
        !            40: #              endif
        !            41: #              ifdef xATR2
        !            42:                if (tTf(26, 8))
        !            43:                        printf("fstat-lp %.12s %ld\n", d->reldum.relid, lpage);
        !            44: #              endif
        !            45:        }
        !            46:        stuff_page(tid, &lpage);
        !            47:        tid->line_id = 0;
        !            48:        return (0);
        !            49: }

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