[rrd-developers] rrd_datalang

[Tobias Oetiker]

/*****************************************************************************
 * RRDtool 1.0.33  Copyright Tobias Oetiker, 1997 - 2001
 *****************************************************************************
 * rrd_datalang  A system for passing named and typed parameters between
 *               the different parts of rrdtool
 *
 * In rrdtool thre are a number of places where large and complex
 * data structures have to be passed from one function to another
 * eg when rrd_info returns its findings, but also when a function
 * like rrd_graph get called.
 *
 * At the moment function calling is done with an argc/argv type
 * interface.  Its special property is that all data is passed as
 * strings, this can lead to unnecessary data conversions being
 * performed when rrdtool functions are called from a typed
 * language
 *
 * Data returned from functions is not standardized at all, which is
 * efficient in the sense that the data return interface can be
 * tailored to the specific needs of the function at hand, but it
 * also leads to increased probability for implementation errors
 * as things have to be reinvented for each function. Also adding
 * new functions into all the language bindings is quite cumbersome.
 *
 * Therefore I want to develop a standardized interface for passing named
 * and typed data into functions and for returning data from functions to
 * their callers.  I am thinking about working of the code in rrd_info.c ...
 *
 * Does anyone have experience in this field or any pointers to
 * read up on related work ? Or maybe even an existing library for
 * this ?
 *
 * Cheers
 * tobi / 2001-03-10
 *
 *****************************************************************************/

-- 
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