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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 flmeth.cpp
\brief Method processing of flext base class.
*/
#include "flext.h"
#include <string.h>
#include <stdarg.h>
#include "flinternal.h"
#include <set>
flext_base::MethItem::MethItem(int in,const t_symbol *tg,AttrItem *conn):
Item(tg,in,conn),index(0),
argc(0),args(NULL)
,fun(NULL)
{}
flext_base::MethItem::~MethItem()
{
if(args) delete[] args;
}
void flext_base::MethItem::SetArgs(methfun _fun,int _argc,metharg *_args)
{
fun = _fun;
if(args) delete[] args;
argc = _argc,args = _args;
}
void flext_base::AddMethodDef(int inlet,const char *tag)
{
methhead->Add(new MethItem(inlet,tag?MakeSymbol(tag):NULL));
}
/*! \brief Add a method to the queue
*/
void flext_base::AddMethod(ItemCont *ma,int inlet,const char *tag,methfun fun,metharg tp,...)
{
va_list marker;
// at first just count the arg type list (in argc)
int argc = 0;
va_start(marker,tp);
metharg *args = NULL,arg = tp;
for(; arg != a_null; ++argc) arg = (metharg)va_arg(marker,int); //metharg);
va_end(marker);
if(argc > 0) {
if(argc > FLEXT_MAXMETHARGS) {
error("flext - method %s: only %i arguments are type-checkable: use variable argument list for more",tag?tag:"?",FLEXT_MAXMETHARGS);
argc = FLEXT_MAXMETHARGS;
}
args = new metharg[argc];
va_start(marker,tp);
metharg a = tp;
for(int ix = 0; ix < argc; ++ix) {
#ifdef FLEXT_DEBUG
if(a == a_list && ix > 0) {
ERRINTERNAL();
}
#endif
#if FLEXT_SYS == FLEXT_SYS_PD
if(a == a_pointer && flext_base::compatibility) {
post("Pointer arguments are not allowed in compatibility mode");
}
#endif
args[ix] = a;
a = (metharg)va_arg(marker,int); //metharg);
}
va_end(marker);
}
MethItem *mi = new MethItem(inlet,MakeSymbol(tag));
mi->SetArgs(fun,argc,args);
ma->Add(mi);
// set index
MethItem *last = (MethItem *)ma->Last();
if(last) mi->index = last->index+1;
}
struct methless : public std::binary_function <flext_base::MethItem *,flext_base::MethItem *, bool>
{
bool operator()(const flext_base::MethItem *l,const flext_base::MethItem *r) const {
return l->index != r->index?l->index < r->index:strcmp(flext::GetString(l->tag),flext::GetString(r->tag)) < 0;
}
};
void flext_base::ListMethods(AtomList &la,int inlet) const
{
typedef std::set<MethItem *,methless> MethList;
MethList list[2];
int i;
for(i = 0; i <= 1; ++i) {
ItemCont *a = i?methhead:clmethhead;
if(a) {
for(int ai = 0; ai < a->Size(); ++ai) {
for(Item *l = a->GetItem(ai); l; l = l->nxt) {
MethItem *aa = (MethItem *)l;
// match inlet and see check it's not related to an attribute
if(aa->inlet == inlet && !aa->IsAttr())
list[i].insert(aa);
}
}
}
}
la(list[0].size()+list[1].size());
int ix = 0;
MethList::iterator it;
for(i = 0; i <= 1; ++i)
for(it = list[i].begin(); it != list[i].end(); ++it)
SetSymbol(la[ix++],(*it)->tag);
}
bool flext_base::ListMethods(int inlet) const
{
if(procattr) {
AtomList la;
ListMethods(la,inlet);
ToOutAnything(GetOutAttr(),MakeSymbol("methods"),la.Count(),la.Atoms());
return true;
}
else
return false;
}
bool flext_base::cb_ListMethods(flext_base *c,int argc,const t_atom *argv)
{
if(argc == 0 || (argc == 1 && CanbeInt(argv[0])))
return c->ListMethods(argc?GetAInt(argv[0]):0);
else
return false;
}
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