//
// Modified By:   Craig Stuart Sapp <craig@ccrma.stanford.edu>
// Creation Date: Mon Feb  3 09:32:00 PST 2003
// Last Modified: Fri Feb  7 08:00:59 PST 2003
// Filename:      bang.c
// Source:        Ichiro Fujinaga: Max/MSP Externals Tutorial, 2002, v2.41, p.3
// Web Address:   http://peabody.sapp.org/class/dmp2/lab/bang/bang.c
// Syntax:        C; Max4/MSP2 External Object; CodeWarrior 6.0
// OS:	          Mac OS 9; PPC
//
// Description:   Demonstration of how to receive a bang input message.
//                This object contains one input and one output.  The
//                input accepts bang messages, and will send the bang
//                to the output immediately when it receives it.
//

#include "ext.h"

typedef stuct {
   t_object max_data;  // must always be the first field; used by Max
   void*    output;    // pointer to outlet, need one for each outlet
} MyObject;

void* object_data;     // pointer to data for object (created in setup());

// function declarations:
void   main            (void);
void*  create_object   (void);
void   InputBang       (MyObject* mo);


//////////////////////////////////////////////////////////////////////////
//
// Initialization functions:
//

void main(void) {
   setup((t_messlist**)&object_data, // the pointer for object data
         (method)create_object,      // your function that initializes object
         NULL,                       // your function that deinitializes object
         (short)sizeof(MyObject),    // size of your object data struct
         NULL,                       // your menu function
         A_NOTHING);                 // A list of default parameters types
                                     // ending with A_NOTHING
   addbang((method)InputBang);       // associate InputBang with incoming bangs
}



//////////////////////////////
//
// create_object -- object initializing function.  This function is
//    called by the setup() function inside of main().  Place code
//    here which will be used to initialized your data structure,
//    as well as the actual creation of the data storage itself.
//    The setup function will cause the pointer object_data to point
//    to the created data storage.
//

void* create_object(void) {
   MyObject *mo;                            // temporary pointer
   mo = (MyObject*)newobject(object_data);  // create data storage for object
   mo->output = bangout(mo);                // set 1 output which sends bangs
   return mo;                               // return pointer to data storage
}


//////////////////////////////////////////////////////////////////////////
//
// Behavior functions:
//


//////////////////////////////
//
// InputBang -- What to do when a bang message arrives into the object:
//     if a bang is received from the object input, then send out a bang.
//

void InputBang(MyObject* mo) {
   outlet_bang(mo->output);
}