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Annotation of 42BSD/ingres/source/ctlmod/writeqry.c, revision 1.1

1.1     ! root        1: # include      <ingres.h>
        !             2: # include      <aux.h>
        !             3: # include      <tree.h>
        !             4: # include      <symbol.h>
        !             5: # include      <sccs.h>
        !             6: 
        !             7: SCCSID(@(#)writeqry.c  7.1     2/5/81)
        !             8: 
        !             9: 
        !            10: /*
        !            11: **  WRITEQRY -- write a whole query
        !            12: **
        !            13: **     An entire query is written, including range table, and so
        !            14: **     forth.
        !            15: **
        !            16: **     Parameters:
        !            17: **             root -- the root of the tree to write.
        !            18: **             wrfn -- the function to do the physical write.
        !            19: **             fnparam -- a parameter to pass to wrfn.
        !            20: **
        !            21: **     Returns:
        !            22: **             none
        !            23: **
        !            24: **     Side Effects:
        !            25: **             none.
        !            26: */
        !            27: 
        !            28: writeqry(root, wrfn, fnparam)
        !            29: QTREE  *root;
        !            30: int    (*wrfn)();
        !            31: char   *fnparam;
        !            32: {
        !            33:        register int    i;
        !            34:        struct srcid    sid;
        !            35: 
        !            36:        /* write the query mode */
        !            37:        if (Qt.qt_qmode >= 0)
        !            38:                writesym(QMODE, 2, (char *) &Qt.qt_qmode, wrfn, fnparam);
        !            39: 
        !            40:        /* write the range table */
        !            41:        for (i = 0; i < MAXRANGE; i++)
        !            42:        {
        !            43:                if (Qt.qt_rangev[i].rngvmark)
        !            44:                {
        !            45:                        sid.srcvar = i;
        !            46:                        bmove((char *) Qt.qt_rangev[i].rngvdesc, (char *) &sid.srcdesc, sizeof sid.srcdesc);
        !            47:                        writesym(SOURCEID, sizeof sid, (char *) &sid, wrfn, fnparam);
        !            48:                }
        !            49:        }
        !            50: 
        !            51:        /* write a possible result variable */
        !            52:        if (Qt.qt_resvar >= 0)
        !            53:                writesym(RESULTVAR, 2, (char *) &Qt.qt_resvar, wrfn, fnparam);
        !            54: 
        !            55:        /* write the tree */
        !            56:        writetree(root, wrfn, fnparam);
        !            57: }
        !            58: /*
        !            59: **  WRITETREE -- write query tree
        !            60: **
        !            61: **     A query tree is written to the down pipe.  The parameter is
        !            62: **     the root of the tree to be written.
        !            63: **
        !            64: **     Parameters:
        !            65: **             q1 -- the root of the tree to write.
        !            66: **             wrfn -- the function to call to do physical
        !            67: **                     writes.
        !            68: **             fnparam -- a parameter to pass to wrfn.
        !            69: **
        !            70: **     Returns:
        !            71: **             none
        !            72: **
        !            73: **     Side Effects:
        !            74: **             none
        !            75: */
        !            76: 
        !            77: writetree(q1, wrfn, fnparam)
        !            78: QTREE  *q1;
        !            79: int    (*wrfn)();
        !            80: char   *fnparam;
        !            81: {
        !            82:        register QTREE  *q;
        !            83:        register int    l;
        !            84:        register char   t;
        !            85: 
        !            86:        q = q1;
        !            87: 
        !            88:        /* write the subtrees */
        !            89:        if (q->left != NULL)
        !            90:                writetree(q->left, wrfn, fnparam);
        !            91:        if (q->right != NULL)
        !            92:                writetree(q->right, wrfn, fnparam);
        !            93: 
        !            94:        /* write this node */
        !            95:        t = q->sym.type;
        !            96:        if (t == AND || t == ROOT || t == AGHEAD)
        !            97:                q->sym.len = 0;
        !            98:        l = q->sym.len & I1MASK;
        !            99:        writesym(q->sym.type, l, (char *) &q->sym.value, wrfn, fnparam);
        !           100: #      ifdef   xQTR1
        !           101:        if (tTf(11, 8))
        !           102:                nodepr(q);
        !           103: #      endif
        !           104: }
        !           105: /*
        !           106: **  WRITESYM -- write a symbol block
        !           107: **
        !           108: **     A single symbol entry of the is written.
        !           109: **     a 'value' of zero will not be written.
        !           110: */
        !           111: 
        !           112: writesym(typ, len, value, wrfn, fnparam)
        !           113: int    typ;
        !           114: int    len;
        !           115: char   *value;
        !           116: int    (*wrfn)();
        !           117: char   *fnparam;
        !           118: {
        !           119:        struct symbol   sym;
        !           120:        register char   *v;
        !           121:        register int    l;
        !           122: 
        !           123:        sym.type = typ & I1MASK;
        !           124:        sym.len = l = len & I1MASK;
        !           125:        (*wrfn)(&sym, 2, fnparam);
        !           126:        v = value;
        !           127:        if (v != NULL && l > 0)
        !           128:                (*wrfn)(v, l, fnparam);
        !           129: }

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