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/*
flext tutorial - advanced 1
Copyright (c) 2002 Thomas Grill (xovo@gmx.net)
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "license.txt," in this distribution.
-------------------------------------------------------------------------
This is an example of a simplified prepend object
*/
#include <flext.h>
#if !defined(FLEXT_VERSION) || (FLEXT_VERSION < 400)
#error You need at least flext version 0.4.0
#endif
class adv1:
public flext_base
{
FLEXT_HEADER(adv1,flext_base)
public:
// constructor with variable argument list
adv1(int argc,t_atom *argv);
protected:
void m_any(const t_symbol *s,int argc,t_atom *argv); // method which digests anything
AtomList lst;
private:
FLEXT_CALLBACK_A(m_any); // callback for method "m_any" (with anything argument)
};
// instantiate the class (constructor has a variable argument list)
// note the two words in the string: prepend acts as an alias for adv1!
FLEXT_NEW_V("adv1 prepend",adv1)
// constructor
adv1::adv1(int argc,t_atom *argv)
{
AddInAnything(); // one inlet that can receive anything
AddOutAnything(); // one outlet for anything
// set up inlets and outlets
SetupInOut();
// register method
FLEXT_ADDMETHOD(0,m_any); // register method "m_any" for inlet 0
if(argc != 0) { // check for arg count
// store arg list
lst(argc,argv);
}
else {
// no args given
post("%s - no arguments given",thisName());
// tell flext that the initialization was not successful... object will not live
InitProblem();
}
}
// method
void adv1::m_any(const t_symbol *s,int argc,t_atom *argv)
{
// reserve space for as many atoms as possibly necessary
AtomList result(lst.Count()+argc+2);
// ix is our counter of atoms to output
int ix = 0;
int i = 0;
if(!IsSymbol(lst[0])) {
// if first element to prepend is no symbol then make it a "list"
SetSymbol(result[ix++],sym_list);
}
// copy atoms to prepend to result list
for(; i < lst.Count(); ++i) CopyAtom(&result[ix++],&lst[i]);
// if anything is no "list" or "float" then append it to result list
if(s != sym_list && s != sym_float
#ifdef MAXMSP
&& s != sym_int // in Max integers are system data types
#endif
)
SetSymbol(result[ix++],s);
// append pending arguments to result list
for(i = 0; i < argc; ++i) CopyAtom(&result[ix++],argv+i);
// output result list as an anything
ToOutAnything(0,GetSymbol(result[0]),ix-1,result.Atoms()+1);
}
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