Function get_tuple_info

contrib/formatter_fixedwidth/fixedwidth.c:410–452

}

static void 
get_tuple_info(TupleDesc tupdesc, int *r_ncolumns, format_t **r_myData, char **data, 
			   FunctionCallInfo fcinfo, FormatConfig *format_out_config)
{
	HeapTupleData		tuple;	
	HeapTupleHeader		rec	= PG_GETARG_HEAPTUPLEHEADER(0);	
	/* Get our internal description of the formatter */
	*r_ncolumns = tupdesc->natts;
	int ncolumns = *r_ncolumns;	
	*r_myData = (format_t *) FORMATTER_GET_USER_CTX(fcinfo);
	format_t *myData = *r_myData;
	
	if (myData == NULL)
	{
		myData          = palloc(sizeof(format_t));
		*r_myData       = myData;
		
		myData->ncols   = ncolumns;
		myData->values  = palloc(sizeof(Datum) * ncolumns);
		myData->nulls   = palloc(sizeof(bool) * ncolumns);
		initStringInfo( &(myData->one_field) );
		
		
		init_format_out_config(format_out_config, ncolumns, tupdesc, fcinfo);
		
		/* Determine required buffer size */
		myData->buflen = format_out_config->fields_tot_size + strlen(format_out_config->line_delimiter);
		myData->buflen = Max(128, myData->buflen);  /* allocate at least 128 bytes */
		myData->buffer = palloc(myData->buflen + VARHDRSZ);
		
		FORMATTER_SET_USER_CTX(fcinfo, myData);
	}
	if (myData->ncols != ncolumns)
		elog(ERROR, "formatter_export: unexpected change of output record type");

	/* break the input tuple into fields */
	tuple.t_len = HeapTupleHeaderGetDatumLength(rec);
	ItemPointerSetInvalid(&(tuple.t_self));
	tuple.t_data = rec;
	heap_deform_tuple(&tuple, tupdesc, myData->values, myData->nulls);
	*data = VARDATA(myData->buffer);
	
}

static int
get_actual_line_size(FormatConfig *format_in_config, char *line_start, int cur_size, int tot_size, PG_FUNCTION_ARGS)