Function msPostGISLayerOpen

mappostgis.c:2160–2283

** msPostGISLayerOpen() ** ** Registered vtable->LayerOpen function. */

** Registered vtable->LayerOpen function.
*/
int msPostGISLayerOpen(layerObj *layer) {
#ifdef USE_POSTGIS
    msPostGISLayerInfo  *layerinfo;
    int order_test = 1;

    assert(layer != NULL);

    if (layer->debug) {
        msDebug("msPostGISLayerOpen called: %s\n", layer->data);
    }

    if (layer->layerinfo) {
        if (layer->debug) {
            msDebug("msPostGISLayerOpen: Layer is already open!\n");
        }
        return MS_SUCCESS;  /* already open */
    }

    if (!layer->data) {
        msSetError(MS_QUERYERR, "Nothing specified in DATA statement.", "msPostGISLayerOpen()");
        return MS_FAILURE;
    }

    /*
    ** Initialize the layerinfo 
    **/
    layerinfo = msPostGISCreateLayerInfo();

    if (((char*) &order_test)[0] == 1) {
        layerinfo->endian = LITTLE_ENDIAN;
    } else {
        layerinfo->endian = BIG_ENDIAN;
    }

    /*
    ** Get a database connection from the pool.
    */
    layerinfo->pgconn = (PGconn *) msConnPoolRequest(layer);

    /* No connection in the pool, so set one up. */
    if (!layerinfo->pgconn) {
        char *conn_decrypted;
        if (layer->debug) {
            msDebug("msPostGISLayerOpen: No connection in pool, creating a fresh one.\n");
        }

        if (!layer->connection) {
            msSetError(MS_MISCERR, "Missing CONNECTION keyword.", "msPostGISLayerOpen()");
            return MS_FAILURE;
        }

        /*
        ** Decrypt any encrypted token in connection string and attempt to connect.
        */
        conn_decrypted = msDecryptStringTokens(layer->map, layer->connection);
        if (conn_decrypted == NULL) {
            return MS_FAILURE;  /* An error should already have been produced */
        }