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ModuleDescription.h

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#ifndef __MODULEDESCRIPTION_H__
#define __MODULEDESCRIPTION_H__

#include <stdio.h>
#include <iostream.h>
#include "EST_String.h"

/** Machine readable descriptions of modules. Useful for help messages
  * and for verifying that a  set of modules should work together.
  *
  * This is a struct rather than a class so that it can be initialised
  * in the source of the module. 
  * @author Richard Caley <rjc@cstr,ed,ac,uk>
  * @version $Id: ModuleDescription.h,v 1.2 2001/04/04 13:12:35 awb Exp $
  */

00050 struct ModuleDescription {

  /**@name limits */
//@{
/// Number of lines of descriptive text.
#define MD_MAX_DESCRIPTION_LINES (10)
/// Space for input streams.
#define MD_MAX_INPUT_STREAMS (5)
/// Space for optional streams.
#define MD_MAX_OPTIONAL_STREAMS (5)
/// Space for output streams.
#define MD_MAX_OUTPUT_STREAMS (5)
/// Space for parameters.
#define MD_MAX_PARAMETERS (10)
//@}

/**@name Parameter types
  * Use these for types to avoid typoes and to allow for a cleverer system
  * at a later date.
  */
//@{
/// t or nil
#define mpt_bool  "BOOL"
/// Positive integer
#define mpt_natnum      "NATNUM"
/// Integer
#define mpt_int         "INT"
/// Floating point number
#define mpt_float "FLOAT"
/// Any string
#define mpt_string      "STRING"
/// A UnitDatabase
#define mpt_unitdatabase "UNITDATABASE"
/// Anything
#define mpt_other "OTHER"
//@}

  /// name of module
00088   const char * name;          
  /// version number of module
00090   float version;        
  /// where it comes from
00092   const char * organisation;  
  /// person(s) responsible
00094   const char * author;        

  /// general description
00097   const char * description[MD_MAX_DESCRIPTION_LINES];

  /// streams affected.
00100   struct stream_parameter {
    /// default stream name
00102     const char * name;        
    /// what itis used for
00104     const char * description; 
  };

  /// Streams which must have values when the module is called.
00108   struct stream_parameter input_streams[MD_MAX_INPUT_STREAMS];
  /// Streams which may or not be defined.
00110   struct stream_parameter optional_streams[MD_MAX_OPTIONAL_STREAMS];
  /// Streams which will be defined after the module has run.
00112   struct stream_parameter output_streams[MD_MAX_OUTPUT_STREAMS];

  /// Record for a parameter.
00115   struct parameter {
    /// Name of parameter
00117     const char * name;
    /// Type of value.
00119     const char * type;
    /// Default value assumed.
00121     const char * default_val;
    /// Human readable description of effect.
00123     const char * description;
  };
  /// Parameters which effect the module.
00126   struct parameter parameters[MD_MAX_PARAMETERS];

  /// Create human readable string from description.
  static EST_String to_string(const ModuleDescription &desc);
  /// Create a module description, initialising it properly.
  static struct ModuleDescription *create();
  /// Print the description to the strream.
  static ostream &print(ostream &s, const ModuleDescription &desc);

  static int print(FILE *s, const ModuleDescription &desc);

};

/// Output operator for descriptions.
ostream &operator << (ostream &stream, const ModuleDescription &desc);

VAL_REGISTER_CLASS_DCLS(moddesc,ModuleDescription)
SIOD_REGISTER_CLASS_DCLS(moddesc,ModuleDescription)

#endif

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