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/*
flext - C++ layer for Max/MSP and pd (pure data) externals
Copyright (c) 2001-2003 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.
*/
/*! \file flmsg.cpp
\brief Message processing of flext base class.
*/
#include "flext.h"
bool flext_base::CallMeth(const MethItem &m,int argc,const t_atom *argv)
{
bool ret = false;
int ix;
t_any aargs[FLEXT_MAXMETHARGS];
bool ok = true;
for(ix = 0; ix < argc && ok; ++ix) {
switch(m.args[ix]) {
case a_float: {
if(IsFloat(argv[ix])) aargs[ix].ft = GetFloat(argv[ix]);
else if(IsInt(argv[ix])) aargs[ix].ft = (float)GetInt(argv[ix]);
else ok = false;
if(ok) FLEXT_LOG2("int arg %i = %f",ix,aargs[ix].ft);
break;
}
case a_int: {
if(IsFloat(argv[ix])) aargs[ix].it = (int)GetFloat(argv[ix]);
else if(IsInt(argv[ix])) aargs[ix].it = GetInt(argv[ix]);
else ok = false;
if(ok) FLEXT_LOG2("float arg %i = %i",ix,aargs[ix].it);
break;
}
case a_symbol: {
if(IsSymbol(argv[ix])) aargs[ix].st = GetSymbol(argv[ix]);
else ok = false;
if(ok) FLEXT_LOG2("symbol arg %i = %s",ix,GetString(aargs[ix].st));
break;
}
#if FLEXT_SYS == FLEXT_SYS_PD
case a_pointer: {
if(IsPointer(argv[ix])) aargs[ix].pt = (t_gpointer *)GetPointer(argv[ix]);
else ok = false;
break;
}
#endif
default:
error("Argument type illegal");
ok = false;
}
}
if(ok && ix == argc) {
switch(argc) {
case 0: ret = ((methfun_0)m.fun)(this); break;
case 1: ret = ((methfun_1)m.fun)(this,aargs[0]); break;
case 2: ret = ((methfun_2)m.fun)(this,aargs[0],aargs[1]); break;
case 3: ret = ((methfun_3)m.fun)(this,aargs[0],aargs[1],aargs[2]); break;
case 4: ret = ((methfun_4)m.fun)(this,aargs[0],aargs[1],aargs[2],aargs[3]); break;
case 5: ret = ((methfun_5)m.fun)(this,aargs[0],aargs[1],aargs[2],aargs[3],aargs[4]); break;
}
}
return ret;
}
bool flext_base::TryMethTag(const MethItem *m,int inlet,const t_symbol *t,int argc,const t_atom *argv)
{
do {
if(m->inlet == inlet && m->tag == t) {
FLEXT_LOG3("found method tag %s: inlet=%i, argc=%i",GetString(m->tag),m->inlet,argc);
if(m->attr) {
// attributes are treated differently
if(m->attr->IsGet())
return DumpAttrib(m->attr);
else
return SetAttrib(m->attr,argc,argv);
}
else {
if(m->argc == 1) {
// try list
if(m->args[0] == a_list && ((methfun_V)m->fun)(this,argc,const_cast<t_atom *>(argv))) return true;
// try anything
if(m->args[0] == a_any && ((methfun_A)m->fun)(this,m->tag,argc,const_cast<t_atom *>(argv))) return true;
}
// try matching number of args
if(argc == m->argc && CallMeth(*m,argc,argv)) return true;
}
}
} while((m = (const MethItem *)m->nxt) != NULL);
return false;
}
bool flext_base::TryMethSym(const MethItem *m,int inlet,const t_symbol *t,const t_symbol *s)
{
do {
if(!m->IsAttr() && m->inlet == inlet && m->tag == t) {
FLEXT_LOG3("found symbol method for %s: inlet=%i, symbol=%s",GetString(m->tag),m->inlet,GetString(s));
t_any sym; sym.st = const_cast<t_symbol *>(s);
if(((methfun_1)m->fun)(this,sym)) return true;
}
} while((m = (const MethItem *)m->nxt) != NULL);
return false;
}
bool flext_base::TryMethAny(const MethItem *m,int inlet,const t_symbol *t,const t_symbol *s,int argc,const t_atom *argv)
{
do {
if(!m->IsAttr() && m->inlet == inlet && m->tag == t) {
FLEXT_LOG4("found any method for %s: inlet=%i, symbol=%s, argc=%i",GetString(m->tag),m->inlet,GetString(s),argc);
if(((methfun_A)m->fun)(this,s,argc,const_cast<t_atom *>(argv))) return true;
}
} while((m = (const MethItem *)m->nxt) != NULL);
return false;
}
/*! \brief Find a method item for a specific tag and arguments
\remark All attributes are also stored in the method list and retrieved by a member of the method item
*/
bool flext_base::FindMeth(int inlet,const t_symbol *s,int argc,const t_atom *argv)
{
MethItem *m;
// search for exactly matching tag
if((m = (MethItem *)methhead->Find(s,inlet)) != NULL && TryMethTag(m,inlet,s,argc,argv)) return true;
if((m = (MethItem *)clmethhead->Find(s,inlet)) != NULL && TryMethTag(m,inlet,s,argc,argv)) return true;
// if no list args, then search for pure symbol
if(!argc) {
if((m = (MethItem *)methhead->Find(sym_symbol,inlet)) != NULL && TryMethSym(m,inlet,sym_symbol,s)) return true;
if((m = (MethItem *)clmethhead->Find(sym_symbol,inlet)) != NULL && TryMethSym(m,inlet,sym_symbol,s)) return true;
}
// otherwise search for anything
if((m = (MethItem *)methhead->Find(sym_anything,inlet)) != NULL && m->argc == 1 && m->args[0] == a_any && TryMethAny(m,inlet,sym_anything,s,argc,argv)) return true;
if((m = (MethItem *)clmethhead->Find(sym_anything,inlet)) != NULL && m->argc == 1 && m->args[0] == a_any && TryMethAny(m,inlet,sym_anything,s,argc,argv)) return true;
// if nothing found try any inlet
return inlet >= 0 && FindMeth(-1,s,argc,argv);
}
/*! \brief All the message processing
The messages of all the inlets go here and are promoted to the registered callback functions
*/
bool flext_base::m_methodmain(int inlet,const t_symbol *s,int argc,const t_atom *argv)
{
static bool trap = false;
curtag = s;
// post("methodmain inlet:%i args:%i symbol:%s",inlet,argc,s?GetString(s):"");
bool ret = FindMeth(inlet,s,argc,argv);
if(ret) goto end;
#if FLEXT_SYS == FLEXT_SYS_MAX
// If float message is not explicitly handled: try int handler instead
if(argc == 1 && s == sym_float && !trap) {
t_atom fl;
SetInt(fl,GetAInt(argv[0]));
trap = true;
ret = m_methodmain(inlet,sym_int,1,&fl);
trap = false;
}
if(ret) goto end;
// If int message is not explicitly handled: try float handler instead
if(argc == 1 && s == sym_int && !trap) {
t_atom fl;
SetFloat(fl,GetAFloat(argv[0]));
trap = true;
ret = m_methodmain(inlet,sym_float,1,&fl);
trap = false;
}
if(ret) goto end;
#endif
// If float or int message is not explicitly handled: try list handler instead
if(!trap && argc == 1 && (s == sym_float
#if FLEXT_SYS == FLEXT_SYS_MAX
|| s == sym_int
#endif
)) {
t_atom list;
if(s == sym_float)
SetFloat(list,GetFloat(argv[0]));
#if FLEXT_SYS == FLEXT_SYS_MAX
else if(s == sym_int)
SetInt(list,GetInt(argv[0]));
#endif
trap = true;
ret = m_methodmain(inlet,sym_list,1,&list);
trap = false;
}
if(ret) goto end;
// If symbol message (pure anything without args) is not explicitly handled: try list handler instead
if(!trap && argc == 0) {
t_atom list;
SetSymbol(list,s);
trap = true;
ret = m_methodmain(inlet,sym_list,1,&list);
trap = false;
}
if(ret) goto end;
// if distmsgs is switched on then distribute list elements over inlets (Max/MSP behavior)
if(distmsgs && !trap && inlet == 0 && s == sym_list && insigs <= 1) {
int i = incnt;
if(i > argc) i = argc;
for(--i; i >= 0; --i) { // right to left distribution
const t_symbol *sym = NULL;
if(IsFloat(argv[i])) sym = sym_float;
else if(IsInt(argv[i])) sym = sym_int;
else if(IsSymbol(argv[i])) sym = sym_symbol;
#if FLEXT_SYS == FLEXT_SYS_PD
else if(IsPointer(argv[i])) sym = sym_pointer; // can pointer atoms occur here?
#endif
if(sym) {
trap = true;
m_methodmain(i,sym,1,argv+i);
trap = false;
}
}
ret = true;
}
if(!ret && !trap) ret = m_method_(inlet,s,argc,argv);
end:
curtag = NULL;
return ret; // true if appropriate handler was found and called
}
bool flext_base::m_method_(int inlet,const t_symbol *s,int argc,const t_atom *argv)
{
//#ifdef FLEXT_DEBUG
post("%s: message unhandled - inlet:%i args:%i symbol:%s",thisName(),inlet,argc,s?GetString(s):"");
//#endif
return false;
}
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