Ejemplo n.º 1
0
void	iosocket_use(io_desc *iod, mval *pp)
{
    unsigned char	ch, len;
    int		handled_len, handlea_len, handles_len;
    int4		length, width, new_len;
    d_socket_struct *dsocketptr;
    socket_struct	*socketptr, newsocket;
    char		handlea[MAX_HANDLE_LEN], handles[MAX_HANDLE_LEN], handled[MAX_HANDLE_LEN];
    char            addr[SA_MAXLITLEN], *errptr, sockaddr[SA_MAXLITLEN],
                    temp_addr[SA_MAXLITLEN], ioerror;
    unsigned char	delimiter_buffer[MAX_N_DELIMITER * (MAX_DELIM_LEN + 1)];
    unsigned char	zff_buffer[MAX_ZFF_LEN];
    boolean_t	attach_specified = FALSE,
                detach_specified = FALSE,
                connect_specified = FALSE,
                ioerror_specified = FALSE,
                listen_specified = FALSE,
                socket_specified = FALSE,
                delay_specified = FALSE,
                nodelay_specified = FALSE,
                bfsize_specified = FALSE,
                ibfsize_specified = FALSE,
                moreread_specified = FALSE,
                create_new_socket;
    int4 		index, n_specified, zff_len, delimiter_len, moreread_timeout;
    int		fil_type, nodelay, p_offset = 0;
    uint4		bfsize = DEFAULT_SOCKET_BUFFER_SIZE, ibfsize;
    char		*tab;
    int		save_errno;
    size_t		d_socket_struct_len;
    mstr		lcl_zff;

    assert(iod->state == dev_open);
    assert(iod->type == gtmsocket);
    dsocketptr = (d_socket_struct *)(iod->dev_sp);
    /* ---------------------------------- parse the command line ------------------------------------ */
    n_specified = 0;
    zff_len = -1; /* indicates neither ZFF nor ZNOFF specified */
    delimiter_len = -1; /* indicates neither DELIM nor NODELIM specified */

    /* A read or wait was interrupted for this device. Allow only parmless use in $zinterrupt code for
       and interrupted device.
    */
    if (iop_eol != *(pp->str.addr + p_offset))
    {   /* Parameters were specified */
        if (dsocketptr->mupintr)
        {   /* And if we are in $zinterrupt code this is not allowed */
            if (dollar_zininterrupt)
                rts_error(VARLSTCNT(1) ERR_ZINTRECURSEIO);
            /* We are not in $zinterrupt code and this device was not resumed properly
               so clear its restartability.
            */
            io_find_mvstent(iod, TRUE);
            dsocketptr->mupintr = FALSE;
        }
    } else if (dsocketptr->mupintr && !dollar_zininterrupt)
    {   /* The interrupted read was not properly resumed so clear it now */
        dsocketptr->mupintr = FALSE;
        dsocketptr->sock_save_state.who_saved = sockwhich_invalid;
        io_find_mvstent(iod, TRUE);
    }

    while (iop_eol != (ch = *(pp->str.addr + p_offset++)))
    {
        assert((params)ch < (params)n_iops);
        switch (ch)
        {
        case iop_exception:
            iod->error_handler.len = *(pp->str.addr + p_offset);
            iod->error_handler.addr = (char *)(pp->str.addr + p_offset + 1);
            s2pool(&iod->error_handler);
            break;
        case iop_filter:
            len = *(pp->str.addr + p_offset);
            tab = pp->str.addr + p_offset + 1;
            if ((fil_type = namelook(filter_index, filter_names, tab, len)) < 0)
            {
                rts_error(VARLSTCNT(1) ERR_TTINVFILTER);
                return;
            }
            switch (fil_type)
            {
            case 0:
                iod->write_filter |= CHAR_FILTER;
                break;
            case 1:
                iod->write_filter |= ESC1;
                break;
            case 2:
                iod->write_filter &= ~CHAR_FILTER;
                break;
            case 3:
                iod->write_filter &= ~ESC1;
                break;
            }
            break;
        case iop_nofilter:
            iod->write_filter = 0;
            break;
        case iop_attach:
            n_specified++;
            attach_specified = TRUE;
            handlea_len = (int)(*(pp->str.addr + p_offset));
            memcpy(handlea, (char *)(pp->str.addr + p_offset + 1), handlea_len);
            break;
        case iop_detach:
            n_specified++;
            detach_specified = TRUE;
            handled_len = (int)(*(pp->str.addr + p_offset));
            memcpy(handled, (char *)(pp->str.addr + p_offset + 1), handled_len);
            break;
        case iop_connect:
            n_specified++;
            connect_specified = TRUE;
            len = *(pp->str.addr + p_offset);
            if (len < SA_MAXLITLEN)
            {
                memcpy(sockaddr, (char *)(pp->str.addr + p_offset + 1), len);
                sockaddr[len] = '\0';
            } else
                rts_error(VARLSTCNT(6) ERR_ADDRTOOLONG,
                          4, len, pp->str.addr + p_offset + 1, len, SA_MAXLITLEN);
            break;
        case iop_delimiter:
            n_specified++;
            delimiter_len = (int4)(unsigned char)*(pp->str.addr + p_offset);
            if (((MAX_DELIM_LEN + 1) * MAX_N_DELIMITER) >= delimiter_len)
                memcpy(delimiter_buffer, (pp->str.addr + p_offset + 1), delimiter_len);
            else
                rts_error(VARLSTCNT(1) ERR_DELIMSIZNA);
            break;
        case	iop_nodelimiter:
            delimiter_len = 0;
            break;
        case	iop_zdelay:
            delay_specified = TRUE;
            break;
        case	iop_znodelay:
            nodelay_specified = TRUE;
            break;
        case	iop_zbfsize:
            bfsize_specified = TRUE;
            GET_ULONG(bfsize, pp->str.addr + p_offset);
            if ((0 == bfsize) || (MAX_SOCKET_BUFFER_SIZE < bfsize))
                rts_error(VARLSTCNT(3) ERR_ILLESOCKBFSIZE, 1, bfsize);
            break;
        case	iop_zibfsize:
            ibfsize_specified = TRUE;
            GET_ULONG(ibfsize, pp->str.addr + p_offset);
            if ((0 == ibfsize) || (MAX_INTERNAL_SOCBUF_SIZE < ibfsize))
                rts_error(VARLSTCNT(3) ERR_ILLESOCKBFSIZE, 1, ibfsize);
            break;
        case iop_ioerror:
            n_specified++;
            ioerror_specified = TRUE;
            ioerror = *(char *)(pp->str.addr + p_offset + 1);
            break;
        case iop_zlisten:
            n_specified++;
            listen_specified = TRUE;
            len = *(pp->str.addr + p_offset);
            if (len < SA_MAXLITLEN)
            {
                memcpy(sockaddr, (char *)(pp->str.addr + p_offset + 1), len);
                sockaddr[len] = '\0';
            } else
                rts_error(VARLSTCNT(6) ERR_ADDRTOOLONG,
                          4, len, pp->str.addr + p_offset + 1, len, SA_MAXLITLEN);
            break;
        case iop_socket:
            n_specified++;
            socket_specified = TRUE;
            handles_len = (int)(*(pp->str.addr + p_offset));
            memcpy(handles, (char *)(pp->str.addr + p_offset + 1), handles_len);
            break;
        case iop_ipchset:
#if defined(KEEP_zOS_EBCDIC) || defined(VMS)
            if ((iconv_t)0 != iod->input_conv_cd)
                ICONV_CLOSE_CD(iod->input_conv_cd);
            SET_CODE_SET(iod->in_code_set, (char *)(pp->str.addr + p_offset + 1));
            if (DEFAULT_CODE_SET != iod->in_code_set)
                ICONV_OPEN_CD(iod->input_conv_cd, INSIDE_CH_SET, (char *)(pp->str.addr + p_offset + 1));
#endif
            break;
        case iop_opchset:
#if defined(KEEP_zOS_EBCDIC) || defined(VMS)
            if ((iconv_t)0 != iod->output_conv_cd)
                ICONV_CLOSE_CD(iod->output_conv_cd);
            SET_CODE_SET(iod->out_code_set, (char *)(pp->str.addr + p_offset + 1));
            if (DEFAULT_CODE_SET != iod->out_code_set)
                ICONV_OPEN_CD(iod->output_conv_cd, (char *)(pp->str.addr + p_offset + 1), INSIDE_CH_SET);
#endif
            break;
        case iop_zff:
            if (MAX_ZFF_LEN >= (zff_len = (int4)(unsigned char)*(pp->str.addr + p_offset)))
                memcpy(zff_buffer, (char *)(pp->str.addr + p_offset + 1), zff_len);
            else
                rts_error(VARLSTCNT(4) ERR_ZFF2MANY, 2, zff_len, MAX_ZFF_LEN);
            break;
        case iop_znoff:
            zff_len = 0;
            break;
        case iop_length:
            GET_LONG(length, pp->str.addr + p_offset);
            if (length < 0)
                rts_error(VARLSTCNT(1) ERR_DEVPARMNEG);
            iod->length = length;
            break;
        case iop_width:
            /* SOCKET WIDTH is handled the same way as TERMINAL WIDTH */
            GET_LONG(width, pp->str.addr + p_offset);
            if (width < 0)
                rts_error(VARLSTCNT(1) ERR_DEVPARMNEG);
            if (0 == width)
            {
                iod->width = TCPDEF_WIDTH;
                iod->wrap = FALSE;
            } else
            {
                iod->width = width;
                iod->wrap = TRUE;
            }
            break;
        case iop_wrap:
            iod->wrap = TRUE;
            break;
        case iop_nowrap:
            iod->wrap = FALSE;
            break;
        case iop_morereadtime:
            /* Time in milliseconds socket read will wait for more data before returning */
            GET_LONG(moreread_timeout, pp->str.addr + p_offset);
            if (-1 == moreread_timeout)
                moreread_timeout = DEFAULT_MOREREAD_TIMEOUT;
            else if (-1 > moreread_timeout)
                rts_error(VARLSTCNT(1) ERR_DEVPARMNEG);
            else if (MAX_MOREREAD_TIMEOUT < moreread_timeout)
                rts_error(VARLSTCNT(3) ERR_MRTMAXEXCEEDED, 1, MAX_MOREREAD_TIMEOUT);
            moreread_specified = TRUE;
            break;
        default:
            /* ignore deviceparm */
            break;
        }
        p_offset += ((io_params_size[ch] == IOP_VAR_SIZE) ?
                     (unsigned char)*(pp->str.addr + p_offset) + 1 : io_params_size[ch]);
    }
    /* ------ return immediately if no flag, worth a check because it is mostly true ------------ */
    if (1 == p_offset)
        return;
    /* ------------------------------ compatibility verification -------------------------------- */
    if ((socket_specified) && ((n_specified > 2) || ((2 == n_specified) && (0 >= delimiter_len))))
    {
        rts_error(VARLSTCNT(8) ERR_ACOMPTBINC, 6, LEN_AND_LIT("SOCKET"), LEN_AND_LIT("DELIMITER"), LEN_AND_LIT("USE"));
        return;
    }
    if (connect_specified && listen_specified)
    {
        rts_error(VARLSTCNT(8) ERR_ABNCOMPTINC, 6, LEN_AND_LIT("CONNECT"), LEN_AND_LIT("ZLISTEN"), LEN_AND_LIT("USE"));
        return;
    }
    if (delay_specified && nodelay_specified)
    {
        rts_error(VARLSTCNT(8) ERR_ABNCOMPTINC, 6, LEN_AND_LIT("DELAY"), LEN_AND_LIT("NODELAY"), LEN_AND_LIT("OPEN"));
        return;
    }
    /* ------------------ make a local copy of device structure to play with -------------------- */
    d_socket_struct_len = SIZEOF(d_socket_struct) + (SIZEOF(socket_struct) * (gtm_max_sockets - 1));
    memcpy(newdsocket, dsocketptr, d_socket_struct_len);
    /* --------------- handle the two special cases attach/detach first ------------------------- */
    if (detach_specified)
    {
        if (1 < n_specified)
        {
            rts_error(VARLSTCNT(6) ERR_ANCOMPTINC, 4, LEN_AND_LIT("DETACH"), LEN_AND_LIT("USE"));
            return;
        }
        if (NULL == socket_pool)
            iosocket_poolinit();
        iosocket_switch(handled, handled_len, newdsocket, socket_pool);
        memcpy(dsocketptr, newdsocket, d_socket_struct_len);
        if (0 > dsocketptr->current_socket)
        {
            io_curr_device.in = io_std_device.in;
            io_curr_device.out = io_std_device.out;
        }
        return; /* detach can only be specified by itself */
    }
    if (attach_specified)
    {   /* NOTE: A socket could be moved from one device to another using DETACH/ATTACH. A socket does not carry I[O]CHSET with
         * it while being moved. Such a socket will use the I[O]CHSET of the device it is ATTACHed to. If there is input still
         * buffered, this may cause unintentional consequences in the application if I[O]CHSET changes. GT.M does not detect
         * (or report) a change in I[O]CHSET due to DETACH/ATTACH.
         */
        if (1 < n_specified)
        {
            rts_error(VARLSTCNT(6) ERR_ANCOMPTINC, 4, LEN_AND_LIT("ATTACH"), LEN_AND_LIT("USE"));
            return;
        }
        if (NULL == socket_pool)
        {
            rts_error(VARLSTCNT(4) ERR_SOCKNOTFND, 2, handlea_len, handlea);
            return;
        }
        iosocket_switch(handlea, handlea_len, socket_pool, newdsocket);
        memcpy(dsocketptr, newdsocket, d_socket_struct_len);
        return; /* attach can only be specified by itself */
    }
    /* ------------ create/identify the socket to work on and make a local copy ----------------- */
    if (create_new_socket = (listen_specified || connect_specified))	/* real "=" */
    {
        /* allocate the structure for a new socket */
        if (NULL == (socketptr = iosocket_create(sockaddr, bfsize, -1)))
            return;
        /* give the new socket a handle */
        iosocket_handle(handles, &handles_len, TRUE, dsocketptr);
        socketptr->handle_len = handles_len;
        memcpy(socketptr->handle, handles, handles_len);
        socketptr->dev = newdsocket;	/* use newdsocket temporarily for the sake of bind/connect */
    } else
    {
        if (socket_specified)
        {
            /* use the socket flag to identify which socket to apply changes */
            if (0 > (index = iosocket_handle(handles, &handles_len, FALSE, newdsocket)))
            {
                rts_error(VARLSTCNT(4) ERR_SOCKNOTFND, 2, handles_len, handles);
                return;
            }
            newdsocket->current_socket = index;
            socketptr = newdsocket->socket[index];
        } else
        {
            socketptr = newdsocket->socket[newdsocket->current_socket];
            if (newdsocket->n_socket <= newdsocket->current_socket)
            {
                assert(FALSE);
                rts_error(VARLSTCNT(4) ERR_CURRSOCKOFR, 2, newdsocket->current_socket, newdsocket->n_socket);
                return;
            }
        }
    }
    newsocket = *socketptr;
    /* ---------------------- apply changes to the local copy of the socket --------------------- */
    if (0 <= delimiter_len)
    {
        iosocket_delimiter(delimiter_buffer, delimiter_len, &newsocket, (0 == delimiter_len));
        /* The delimiter has changed. The iosocket_readfl/write routine won't notice so we have to do
           the UTF16xx conversion since we changed it.
        */
        DBGSOCK2((stdout, "socuse: Delimiter(s) replaced - num delims: %d  delimiter_len: %d  ichset: %d  ochset: %d\n",
                  newsocket.n_delimiter, delimiter_len, iod->ichset, iod->ochset));
        if  (0 < delimiter_len)
        {
            if (!newsocket.first_read && (CHSET_UTF16BE == iod->ichset || CHSET_UTF16LE == iod->ichset))
            {   /* We have been reading with this socket so convert this new delimiter set */
                DBGSOCK2((stdout, "socuse: Converting new delimiters for input\n"));
                iosocket_delim_conv(&newsocket, iod->ichset);
            }
            if (!newsocket.first_write && (CHSET_UTF16BE == iod->ochset || CHSET_UTF16LE == iod->ochset))
            {   /* We have been writing with this socket so convert the new default output delimiter */
                DBGSOCK2((stdout, "socuse: Converting new delimiters for output\n"));
                if (newsocket.first_read || (CHSET_UTF16BE != iod->ichset && CHSET_UTF16LE != iod->ichset))
                {   /* Need to do conversion as iosocket_delim_conv above didn't do it for us */
                    DBGSOCK2((stdout, "socuse: running convert for write since input didn't do it\n"));
                    new_len = gtm_conv(chset_desc[CHSET_UTF8], chset_desc[iod->ochset],
                                       &newsocket.delimiter[0], NULL, NULL);
                    if (MAX_DELIM_LEN < new_len)
                    {
                        rts_error(VARLSTCNT(1) ERR_DELIMSIZNA);
                        return;
                    }
                } else
                {
                    DBGSOCK2((stdout, "socuse: using previous length from read conversion\n"));
                    new_len = newsocket.idelimiter[0].len;
                }
                newsocket.odelimiter0.len = new_len;
                UNICODE_ONLY(newsocket.odelimiter0.char_len = newsocket.delimiter[0].char_len);
                newsocket.odelimiter0.addr = malloc(new_len);
                memcpy(newsocket.odelimiter0.addr,
                       (newsocket.first_read ? (char *)stringpool.free : newsocket.idelimiter[0].addr),
                       new_len);
            }
        }
    }
    if (iod->wrap && 0 != newsocket.n_delimiter && iod->width < newsocket.delimiter[0].len)
        rts_error(VARLSTCNT(4) ERR_DELIMWIDTH, 2, iod->width, newsocket.delimiter[0].len);
    if (0 <= zff_len && /* ZFF or ZNOFF specified */
            0 < (newsocket.zff.len = zff_len)) /* assign the new ZFF len, might be 0 from ZNOFF, or ZFF="" */
    {   /* ZFF="non-zero-len-string" specified */
        if (CHSET_UTF16BE == iod->ochset || CHSET_UTF16LE == iod->ochset) /* need conversion of ZFF */
        {
            DBGSOCK2((stdout, "socuse: Converting zff\n"));
            lcl_zff.addr = (char *)zff_buffer;
            lcl_zff.len = zff_len;
            new_len = gtm_conv(chset_desc[CHSET_UTF8], chset_desc[iod->ochset], &lcl_zff, NULL, NULL);
            if (MAX_ZFF_LEN < new_len)
                rts_error(VARLSTCNT(4) ERR_ZFF2MANY, 2, new_len, MAX_ZFF_LEN);
            if (NULL == newsocket.zff.addr) /* we rely on newsocket.zff.addr being set to 0 in iosocket_create() */
                newsocket.zff.addr = (char *)malloc(MAX_ZFF_LEN);
            newsocket.zff.len = new_len;
            UNICODE_ONLY(newsocket.zff.char_len = 0); /* don't care */
            memcpy(newsocket.zff.addr, stringpool.free, new_len);

        } else
        {   /* Store parm without conversion */
            if (gtm_utf8_mode) /* Check if ZFF has any invalid UTF-8 character */
            {   /* Note: the ZFF string originates from the source program, so is in UTF-8 mode or M mode
                   regardless of OCHSET of this device. ZFF is output on WRITE # command, and MUST contain
                   valid UTF-8 sequence. This validation is handled by gtm_conv in the path above.
                */
                utf8_len_strict(zff_buffer, zff_len);
            }
            if (NULL == newsocket.zff.addr) /* we rely on newsocket.zff.addr being set to 0 in iosocket_create() */
                newsocket.zff.addr = (char *)malloc(MAX_ZFF_LEN);
            memcpy(newsocket.zff.addr, zff_buffer, zff_len);
        }
    }
    if (ioerror_specified)
        newsocket.ioerror = ('T' == ioerror || 't' == ioerror);
    if (nodelay_specified || delay_specified)
        newsocket.nodelay = nodelay_specified;	/* defaults to DELAY */
    if (ibfsize_specified)
        newsocket.bufsiz = ibfsize;
    if (moreread_specified)
    {
        newsocket.moreread_timeout = moreread_timeout;
        newsocket.def_moreread_timeout = TRUE;	/* need to know this was user-defined in iosocket_readfl.c */
    }
    if (!create_new_socket)
    {
        /* these changes apply to only pre-existing sockets */
        if (bfsize_specified)
            newsocket.buffer_size = bfsize;
#ifdef TCP_NODELAY
        nodelay = newsocket.nodelay ? 1 : 0;
        if ((socketptr->nodelay != newsocket.nodelay) &&
                (-1 == tcp_routines.aa_setsockopt(newsocket.sd, IPPROTO_TCP,
                        TCP_NODELAY, &nodelay, SIZEOF(nodelay))))
        {
            save_errno = errno;
            errptr = (char *)STRERROR(save_errno);
            rts_error(VARLSTCNT(7) ERR_SETSOCKOPTERR, 5, LEN_AND_LIT("TCP_NODELAY"), save_errno, LEN_AND_STR(errptr));
            return;
        }
#endif
        if ((socketptr->bufsiz != newsocket.bufsiz) &&
                (-1 == tcp_routines.aa_setsockopt(newsocket.sd, SOL_SOCKET,
                        SO_RCVBUF, &newsocket.bufsiz, SIZEOF(newsocket.bufsiz))))
        {
            save_errno = errno;
            errptr = (char *)STRERROR(save_errno);
            rts_error(VARLSTCNT(7) ERR_SETSOCKOPTERR, 5, LEN_AND_LIT("SO_RCVBUF"), save_errno, LEN_AND_STR(errptr));
            return;
        }
        if (socketptr->buffer_size != newsocket.buffer_size)
        {
            if (socketptr->buffered_length > bfsize)
                rts_error(VARLSTCNT(4) ERR_SOCKBFNOTEMPTY, 2, bfsize, socketptr->buffered_length);
            newsocket.buffer = (char *)malloc(bfsize);
            if (0 < socketptr->buffered_length)
            {
                memcpy(newsocket.buffer, socketptr->buffer + socketptr->buffered_offset,
                       socketptr->buffered_length);
                newsocket.buffered_offset = 0;
            }
        }
    }
    /* -------------------------------------- action -------------------------------------------- */
    if ((listen_specified && (!iosocket_bind(&newsocket, NO_M_TIMEOUT, ibfsize_specified))) ||
            (connect_specified && (!iosocket_connect(&newsocket, 0, ibfsize_specified))))
    {   /* error message should be printed from bind/connect */
        if (socketptr->sd > 0)
            (void)tcp_routines.aa_close(socketptr->sd);
        iosocket_delimiter((unsigned char *)NULL, 0, &newsocket, TRUE);
        if (NULL != socketptr->zff.addr)
            free(socketptr->zff.addr);
        if (NULL != socketptr->buffer)
            free(socketptr->buffer);
        free(socketptr);
        return;
    }
    /* ------------------------------------ commit changes -------------------------------------- */
    if (create_new_socket)
    {
        if (gtm_max_sockets <= newdsocket->n_socket)
        {
            rts_error(VARLSTCNT(3) ERR_SOCKMAX, 1, gtm_max_sockets);
            return;
        }
        /* a new socket is created. so add to the list */
        newsocket.dev = dsocketptr;
        newdsocket->socket[newdsocket->n_socket++] = socketptr;
        newdsocket->current_socket = newdsocket->n_socket - 1;
    }
    else if (socketptr->buffer_size != newsocket.buffer_size)
        free(socketptr->buffer);
    *socketptr = newsocket;
    memcpy(dsocketptr, newdsocket, d_socket_struct_len);
    return;
}
Ejemplo n.º 2
0
/**************************************************************************************************
 * Routine to perform string-level case conversion to "upper", "lower" and "title" case.
 * Since ICU only supports API using UTF-16 representation, case conversion of UTF-8 strings involves
 * encoding conversion as described below:
 * 	1. First, the UTF-8 source string is converted to UTF-16 representation (u_strFromUTF8())
 * 	   which is stored in a local buffer of size MAX_ZCONVBUFF. If this space is not sufficient,
 * 	   we try to allocate it in heap.
 * 	2. Since case conversion may expand the string, we compute the desired space required by
 * 	   preflighting the ICU case conversion API and then allocate the space before performing
 * 	   the real conversion.
 * 	3. Translating the converted UTF-16 string back to UTF-8 is done in stringpool (with similar
 * 	   preflighting to compute the required space.
 * NOTE:
 * 	Malloc is used only if the size exceeds 2K characters (a very unlikely situation esp. with
 * 	case conversion).
 *
 ***************************************************************************************************/
void	op_fnzconvert2(mval *src, mval *kase, mval *dst)
{
	int		index;
	int32_t		src_ustr_len, src_chlen, dst_chlen, ulen, dstlen = 0;
	UErrorCode	status;
	char		*dstbase;
	UChar		src_ustr[MAX_ZCONVBUFF], dst_ustr[MAX_ZCONVBUFF], *src_ustr_ptr, *dst_ustr_ptr;
	intrpt_state_t  prev_intrpt_state;

	DEFER_INTERRUPTS(INTRPT_IN_FUNC_WITH_MALLOC, prev_intrpt_state);

	MV_FORCE_STR(kase);
	if (-1 == (index = verify_case(&kase->str)))
	{
		ENABLE_INTERRUPTS(INTRPT_IN_FUNC_WITH_MALLOC, prev_intrpt_state);
		rts_error_csa(CSA_ARG(NULL) VARLSTCNT(4) ERR_BADCASECODE, 2, kase->str.len, kase->str.addr);
	}

	MV_FORCE_STR(src);
	/* allocate stringpool */
	if (!gtm_utf8_mode)
	{
		dstlen = src->str.len;
		ENSURE_STP_FREE_SPACE(dstlen);
		dstbase = (char *)stringpool.free;
		assert(NULL != casemaps[index].m);
		(*casemaps[index].m)((unsigned char *)dstbase, (unsigned char *)src->str.addr, dstlen);
	} else if (0 != src->str.len)
	{
		MV_FORCE_LEN_STRICT(src);
		if (2 * src->str.char_len <= MAX_ZCONVBUFF)
		{ /* Check if the stack buffer is sufficient considering the worst case where all
		     characters are surrogate pairs, each of which needs 2 UChars */
			src_ustr_ptr = src_ustr;
			src_ustr_len = MAX_ZCONVBUFF;
		} else
		{
		  /* To avoid preflight, allocate (2 * lenght of src->str.char_len). */
			src_ustr_len = 2 * src->str.char_len;
			src_ustr_ptr = (UChar*)malloc(src_ustr_len * SIZEOF(UChar));
		}
		/* Convert UTF-8 src to UTF-16 (UChar*) representation */
		status = U_ZERO_ERROR;
		u_strFromUTF8(src_ustr_ptr, src_ustr_len, &src_chlen, src->str.addr, src->str.len, &status);
		if (U_FAILURE(status))
		{
			RELEASE_IF_NOT_LOCAL(src_ustr_ptr, src_ustr);
			if (U_ILLEGAL_CHAR_FOUND == status || U_INVALID_CHAR_FOUND == status)
				utf8_len_strict((unsigned char *)src->str.addr, src->str.len);	/* to report BADCHAR error */
			ENABLE_INTERRUPTS(INTRPT_IN_FUNC_WITH_MALLOC, prev_intrpt_state);
			rts_error_csa(CSA_ARG(NULL) VARLSTCNT(3) ERR_ICUERROR,
						1, status); /* ICU said bad, we say good or don't recognize error*/
		}
		status = U_ZERO_ERROR;
		dst_ustr_ptr = dst_ustr;
		dst_chlen = (*casemaps[index].u)(dst_ustr_ptr, MAX_ZCONVBUFF, src_ustr_ptr, src_chlen, NULL, &status);
		if ( U_BUFFER_OVERFLOW_ERROR == status )
		{
			status = U_ZERO_ERROR;
			dst_ustr_ptr = (UChar*)malloc(dst_chlen * SIZEOF(UChar));
			/* Now, perform the real conversion with sufficient buffers */
			dst_chlen = (*casemaps[index].u)(dst_ustr_ptr, dst_chlen, src_ustr_ptr, src_chlen, NULL, &status);
		} else if ( U_FILE_ACCESS_ERROR == status )
		{
			RELEASE_IF_NOT_LOCAL(src_ustr_ptr, src_ustr);
			ENABLE_INTERRUPTS(INTRPT_IN_FUNC_WITH_MALLOC, prev_intrpt_state);
			rts_error_csa(CSA_ARG(NULL) VARLSTCNT(3) ERR_ICUERROR,
					1, status);
		}
		RELEASE_IF_NOT_LOCAL(src_ustr_ptr, src_ustr);
		/* Fake the conversion from UTF-16 to UTF-8 to compute the required buffer size */
		status = U_ZERO_ERROR;
		dstlen = 0;
		u_strToUTF8(NULL, 0, &dstlen, dst_ustr_ptr, dst_chlen, &status);
		assert(U_BUFFER_OVERFLOW_ERROR == status || U_SUCCESS(status));
		if (MAX_STRLEN < dstlen)
		{
			RELEASE_IF_NOT_LOCAL(dst_ustr_ptr, dst_ustr);
			ENABLE_INTERRUPTS(INTRPT_IN_FUNC_WITH_MALLOC, prev_intrpt_state);
			rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) ERR_MAXSTRLEN);
		}
		ENSURE_STP_FREE_SPACE(dstlen);
		dstbase = (char *)stringpool.free;
		status = U_ZERO_ERROR;
		u_strToUTF8(dstbase, dstlen, &ulen, dst_ustr_ptr, dst_chlen, &status);
		if (U_FAILURE(status))
		{
			RELEASE_IF_NOT_LOCAL(src_ustr_ptr, src_ustr);
			RELEASE_IF_NOT_LOCAL(dst_ustr_ptr, dst_ustr);
			ENABLE_INTERRUPTS(INTRPT_IN_FUNC_WITH_MALLOC, prev_intrpt_state);
			rts_error_csa(CSA_ARG(NULL) VARLSTCNT(3) ERR_ICUERROR,
					1, status); /* ICU said bad, but same call above just returned OK */
		}
		assertpro(ulen == dstlen);
		RELEASE_IF_NOT_LOCAL(dst_ustr_ptr, dst_ustr);
	}
	MV_INIT_STRING(dst, dstlen, dstbase);
	stringpool.free += dstlen;
	ENABLE_INTERRUPTS(INTRPT_IN_FUNC_WITH_MALLOC, prev_intrpt_state);
}