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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 flattr.cpp
\brief Attribute handling for the flext base class
*/
#include "flext.h"
#include <string.h>
#ifdef __MWERKS__
#define STD std
#else
#define STD
#endif
flext_base::attritem::attritem(const t_symbol *t,metharg tp,methfun f,int fl):
item(t,0,NULL),
flags(fl),argtp(tp),fun(f)
{}
flext_base::attritem::~attritem()
{
// if(nxt) delete nxt;
}
//! Add get and set attributes
void flext_base::AddAttrib(itemarr *aa,itemarr *ma,const char *attr,metharg tp,methfun gfun,methfun sfun)
{
const t_symbol *asym = MakeSymbol(attr);
// if(sfun) // if commented out, there will be a warning at run-time (more user-friendly)
{
attritem *a = new attritem(asym,tp,sfun,attritem::afl_bothexist|attritem::afl_set);
aa->Add(a);
// bind attribute to a method
methitem *mi = new methitem(0,asym,a);
mi->SetArgs(sfun,1,new metharg(tp));
ma->Add(mi);
}
// if(gfun) // if commented out, there will be a warning at run-time (more user-friendly)
{
attritem *a = new attritem(asym,tp,gfun,attritem::afl_bothexist|attritem::afl_get);
aa->Add(a);
static char tmp[256] = "get";
strcpy(tmp+3,attr);
// bind attribute to a method
methitem *mi = new methitem(0,MakeSymbol(tmp),a);
mi->SetArgs(gfun,0,NULL);
ma->Add(mi);
}
}
void flext_base::AddAttrib(const char *attr,metharg tp,methfun gfun,methfun sfun)
{
if(procattr)
AddAttrib(ThAttrs(),ThMeths(),attr,tp,gfun,sfun);
else
error("%s - attribute procession is not enabled!",thisName());
}
void flext_base::AddAttrib(t_classid c,const char *attr,metharg tp,methfun gfun,methfun sfun)
{
AddAttrib(ClAttrs(c),ClMeths(c),attr,tp,gfun,sfun);
}
int flext_base::ListAttr(AtomList &la) const
{
int cnt = attrhead?attrhead->Count():0;
int ccnt = clattrhead?clattrhead->Count():0;
la(ccnt+cnt);
int ix = 0;
for(int i = 0; i <= 1; ++i) {
itemarr *a = i?attrhead:clattrhead;
if(a) {
for(int ai = 0; ai < a->Size(); ++ai) {
for(item *l = a->Item(ai); l; l = l->nxt)
{
attritem *aa = (attritem *)l;
if(!aa->BothExist() || aa->IsGet())
SetSymbol(la[ix++],aa->tag);
}
}
}
}
return ix;
}
int flext_base::CheckAttrib(int argc,const t_atom *argv)
{
int offs = 0;
for(; offs < argc; ++offs)
if(IsString(argv[offs]) && *GetString(argv[offs]) == '@') break;
return offs;
}
bool flext_base::InitAttrib(int argc,const t_atom *argv)
{
int cur,nxt;
for(cur = 0; cur < argc; cur = nxt) {
// find next @symbol
for(nxt = cur+1; nxt < argc; ++nxt)
if(IsString(argv[nxt]) && *GetString(argv[nxt]) == '@') break;
const t_symbol *tag = MakeSymbol(GetString(argv[cur])+1);
SetAttrib(tag,nxt-cur-1,argv+cur+1);
}
return true;
}
bool flext_base::ListAttrib()
{
if(procattr) {
AtomList la;
int c = ListAttr(la);
ToOutAnything(GetOutAttr(),MakeSymbol("attributes"),c,la.Atoms());
return true;
}
else
return false;
}
flext_base::attritem *flext_base::FindAttr(const t_symbol *tag,bool get) const
{
// first search within object scope
attritem *a = (attritem *)attrhead->Find(tag);
while(a && (a->tag != tag || a->inlet != 0 || (get?a->IsSet():a->IsGet()))) a = (attritem *)a->nxt;
// then (if nothing found) search within class scope
if(!a) {
a = (attritem *)clattrhead->Find(tag);
while(a && (a->tag != tag || a->inlet != 0 || (get?a->IsSet():a->IsGet()))) a = (attritem *)a->nxt;
}
return a;
}
bool flext_base::SetAttrib(const t_symbol *tag,int argc,const t_atom *argv)
{
// search for matching attribute
attritem *a = FindAttr(tag,false);
if(a)
return SetAttrib(a,argc,argv);
else {
error("%s - %s: attribute not found",thisName(),GetString(tag));
return true;
}
}
bool flext_base::SetAttrib(attritem *a,int argc,const t_atom *argv)
{
if(a->fun) {
bool ok = true;
AtomList la;
t_any any;
switch(a->argtp) {
case a_float:
if(argc == 1 && CanbeFloat(argv[0])) {
any.ft = GetAFloat(argv[0]);
((methfun_1)a->fun)(this,any);
}
else ok = false;
break;
case a_int:
if(argc == 1 && CanbeInt(argv[0])) {
any.it = GetAInt(argv[0]);
((methfun_1)a->fun)(this,any);
}
else ok = false;
break;
case a_symbol:
if(argc == 1 && IsSymbol(argv[0])) {
any.st = GetSymbol(argv[0]);
((methfun_1)a->fun)(this,any);
}
else ok = false;
break;
case a_LIST:
any.vt = &(la(argc,argv));
((methfun_1)a->fun)(this,any);
break;
default:
ERRINTERNAL();
}
if(!ok)
post("%s - wrong arguments for attribute %s",thisName(),GetString(a->tag));
}
else
post("%s - attribute %s has no get method",thisName(),GetString(a->tag));
return true;
}
bool flext_base::GetAttrib(attritem *a)
{
// main attribute tag
if(a) {
if(a->fun) {
AtomList la;
t_any any;
switch(a->argtp) {
case a_float: {
((methfun_1)a->fun)(this,any);
la(1);
SetFloat(la[0],any.ft);
break;
}
case a_int: {
((methfun_1)a->fun)(this,any);
la(1);
SetInt(la[0],any.it);
break;
}
case a_symbol: {
((methfun_1)a->fun)(this,any);
la(1);
SetSymbol(la[0],any.st);
break;
}
case a_LIST: {
any.vt = &la;
((methfun_1)a->fun)(this,any);
break;
}
default:
ERRINTERNAL();
}
ToOutAnything(GetOutAttr(),a->tag,la.Count(),la.Atoms());
}
else
post("%s - attribute %s has no set method",thisName(),GetString(a->tag));
}
else
error("%s - %s: attribute not found",thisName(),GetString(a->tag));
return true;
}
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