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/*
flext - C++ layer for Max/MSP and pd (pure data) externals
Copyright (c) 2001-2005 Thomas Grill (gr@grrrr.org)
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::TryMethTag(Item *lst,const t_symbol *tag,int argc,const t_atom *argv)
{
for(; lst; lst = lst->nxt) {
MethItem *m = (MethItem *)lst;
// FLEXT_LOG3("found method tag %s: inlet=%i, argc=%i",GetString(tag),m->inlet,argc);
if(m->attr) {
// attributes are treated differently
if(m->attr->IsGet())
return DumpAttrib(tag,m->attr);
else
return SetAttrib(tag,m->attr,argc,argv);
}
else {
if(m->argc == 1) {
if(m->args[0] == a_list) {
// try list
if(((methfun_V)m->fun)(this,argc,const_cast<t_atom *>(argv))) return true;
}
else if(m->args[0] == a_any) {
// try anything
if(((methfun_A)m->fun)(this,tag,argc,const_cast<t_atom *>(argv))) return true;
}
}
// try matching number of args
if(m->argc == argc) {
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: return ((methfun_0)m->fun)(this);
case 1: return ((methfun_1)m->fun)(this,aargs[0]);
case 2: return ((methfun_2)m->fun)(this,aargs[0],aargs[1]);
case 3: return ((methfun_3)m->fun)(this,aargs[0],aargs[1],aargs[2]);
case 4: return ((methfun_4)m->fun)(this,aargs[0],aargs[1],aargs[2],aargs[3]);
case 5: return ((methfun_5)m->fun)(this,aargs[0],aargs[1],aargs[2],aargs[3],aargs[4]);
default:
FLEXT_ASSERT(false);
}
}
}
}
}
return false;
}
bool flext_base::TryMethAny(Item *lst,const t_symbol *s,int argc,const t_atom *argv)
{
for(; lst; lst = lst->nxt) {
MethItem *m = (MethItem *)lst;
if(!m->IsAttr() && m->argc == 1 && m->args[0] == a_any) {
// 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;
}
}
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)
{
Item *lst;
ItemCont *clmethhead = ClMeths(thisClassId());
// search for exactly matching tag
if(methhead && (lst = methhead->FindList(s,inlet)) != NULL && TryMethTag(lst,s,argc,argv)) return true;
if((lst = clmethhead->FindList(s,inlet)) != NULL && TryMethTag(lst,s,argc,argv)) return true;
// if nothing found try any inlet
if(methhead && (lst = methhead->FindList(s,-1)) != NULL && TryMethTag(lst,s,argc,argv)) return true;
if((lst = clmethhead->FindList(s,-1)) != NULL && TryMethTag(lst,s,argc,argv)) return true;
return false;
}
bool flext_base::FindMethAny(int inlet,const t_symbol *s,int argc,const t_atom *argv)
{
Item *lst;
ItemCont *clmethhead = ClMeths(thisClassId());
if(methhead && (lst = methhead->FindList(sym_anything,inlet)) != NULL && TryMethAny(lst,s,argc,argv)) return true;
if((lst = clmethhead->FindList(sym_anything,inlet)) != NULL && TryMethAny(lst,s,argc,argv)) return true;
// if nothing found try any inlet
if(methhead && (lst = methhead->FindList(sym_anything,-1)) != NULL && TryMethAny(lst,s,argc,argv)) return true;
if((lst = clmethhead->FindList(sym_anything,-1)) != NULL && TryMethAny(lst,s,argc,argv)) return true;
return false;
}
/*! \brief All the message processing
The messages of all the inlets go here and are promoted to the registered callback functions
*/
bool flext_base::CbMethodHandler(int inlet,const t_symbol *s,int argc,const t_atom *argv)
{
static bool trap = false;
bool ret;
curtag = s;
// post("methodmain inlet:%i args:%i symbol:%s",inlet,argc,s?GetString(s):"");
try {
ret = FindMeth(inlet,s,argc,argv);
if(ret) goto end;
if(argc == 1) {
if(s == sym_list) {
// for 1-element lists try the single atom (this is the format output by [route])
if(IsFloat(argv[0]))
ret = FindMeth(inlet,sym_float,1,argv);
else if(IsInt(argv[0]))
ret = FindMeth(inlet,sym_int,1,argv);
else if(IsSymbol(argv[0]))
ret = FindMeth(inlet,sym_symbol,1,argv);
else if(IsPointer(argv[0]))
ret = FindMeth(inlet,sym_pointer,1,argv);
if(ret) goto end;
}
else {
if(s == sym_float) {
#if FLEXT_SYS == FLEXT_SYS_MAX
t_atom at;
// If float message is not explicitly handled: try int handler instead
SetInt(at,(int)GetFloat(argv[0]));
ret = FindMeth(inlet,sym_int,1,&at);
if(ret) goto end;
#endif
// If not explicitly handled: try list handler instead
ret = FindMeth(inlet,sym_list,1,argv);
if(ret) goto end;
}
#if FLEXT_SYS == FLEXT_SYS_MAX
else if(s == sym_int) {
t_atom at;
// If int message is not explicitly handled: try float handler instead
SetFloat(at,(float)GetInt(argv[0]));
ret = FindMeth(inlet,sym_float,1,&at);
if(ret) goto end;
// If not explicitly handled: try list handler instead
ret = FindMeth(inlet,sym_list,1,argv);
if(ret) goto end;
}
#endif
else if(s == sym_symbol) {
ret = FindMeth(inlet,sym_list,1,argv);
if(ret) goto end;
}
#if FLEXT_SYS == FLEXT_SYS_PD
else if(s == sym_pointer) {
ret = FindMeth(inlet,sym_list,1,argv);
if(ret) goto end;
}
#endif
}
}
else if(argc == 0) {
// If symbol message (pure anything without args) is not explicitly handled: try list handler instead
t_atom at;
SetSymbol(at,s);
ret = FindMeth(inlet,sym_list,1,&at);
if(ret) goto end;
}
// if distmsgs is switched on then distribute list elements over inlets (Max/MSP behavior)
if(DoDist() && inlet == 0 && s == sym_list && insigs <= 1 && !trap) {
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;
else if(IsPointer(argv[i])) sym = sym_pointer; // can pointer atoms occur here?
if(sym) {
trap = true;
CbMethodHandler(i,sym,1,argv+i);
trap = false;
}
}
goto end;
}
ret = FindMethAny(inlet,s,argc,argv);
if(!ret) ret = CbMethodResort(inlet,s,argc,argv);
}
catch(std::exception &x) {
error("%s - Exception while processing method: %s",thisName(),x.what());
ret = false;
}
catch(const char *txt) {
error("%s - Exception while processing method: %s",thisName(),txt);
ret = false;
}
catch(...) {
error("%s - Unknown exception while processing method",thisName());
ret = false;
}
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)
{
post("%s: message unhandled - inlet:%i args:%i symbol:%s",thisName(),inlet,argc,s?GetString(s):"");
return false;
}
bool flext_base::CbMethodResort(int inlet,const t_symbol *s,int argc,const t_atom *argv)
{
// call deprecated version
return m_method_(inlet,s,argc,argv);
}
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