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/*
py/pyext - python external object for PD and MaxMSP
Copyright (c)2002-2005 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.
*/
#include "pybase.h"
#include "pyatom.h"
static const t_symbol *symatom = flext::MakeSymbol(" py ");
static PyObject *MakePyAtom(const t_atom &at)
{
if(flext::IsSymbol(at))
return pySymbol_FromSymbol(flext::GetSymbol(at));
#if 1
else if(flext::CanbeFloat(at)) {
// if a number can be an integer... let it be an integer!
int ival = flext::GetAInt(at);
double fval = flext::GetAFloat(at);
return (double)ival == fval?PyInt_FromLong(ival):PyFloat_FromDouble(fval);
}
#else
else if(flext::IsFloat(at))
return PyFloat_FromDouble(flext::GetFloat(at));
else if(flext::IsInt(at))
return PyInt_FromLong(flext::GetInt(at));
#endif
return NULL;
}
static PyObject *MakePyAtom(int argc,const t_atom *argv)
{
if(argc != sizeof(size_t)/2) return NULL;
size_t atom = 0;
for(int i = sizeof(size_t)/2-1; i >= 0; --i)
if(!flext::CanbeInt(argv[i])) {
atom = 0;
break;
}
else
atom = (atom<<16)+flext::GetAInt(argv[i]);
if(atom) {
PyObject *el = PyAtom::Retrieve(atom);
if(!el) el = Py_None; // object already gone....
Py_INCREF(el);
return el;
}
else
return NULL;
}
PyObject *pybase::MakePyArgs(const t_symbol *s,int argc,const t_atom *argv,int inlet)
{
PyObject *ret,*el;
if(s == symatom && (el = MakePyAtom(argc,argv)) != NULL) {
ret = PyTuple_New(1);
PyTuple_SET_ITEM(ret,0,el);
}
else {
bool any = IsAnything(s);
ret = PyTuple_New(argc+(any?1:0)+(inlet >= 0?1:0));
int pix = 0;
if(inlet >= 0)
PyTuple_SET_ITEM(ret,pix++,PyInt_FromLong(inlet));
if(any)
PyTuple_SET_ITEM(ret,pix++,pySymbol_FromSymbol(s));
for(int i = 0; i < argc; ++i) {
el = MakePyAtom(argv[i]);
if(!el) {
post("py/pyext: cannot convert argument %i",any?i+1:i);
el = Py_None;
Py_INCREF(Py_None);
}
PyTuple_SET_ITEM(ret,pix++,el); // reference stolen
}
}
return ret;
}
PyObject *pybase::MakePyArg(const t_symbol *s,int argc,const t_atom *argv)
{
PyObject *ret;
if(s == symatom && (ret = MakePyAtom(argc,argv)) != NULL) {
// ok!
}
else if(argc == 1 && !IsAnything(s))
// convert atoms and one-element lists
ret = MakePyAtom(*argv);
else {
bool any = s != sym_list;
ret = PyTuple_New(argc+(any?1:0));
int pix = 0;
if(any)
PyTuple_SET_ITEM(ret,pix++,pySymbol_FromSymbol(s));
for(int i = 0; i < argc; ++i) {
PyObject *el = MakePyAtom(argv[i]);
if(!el) {
post("py/pyext: cannot convert argument %i",any?i+1:i);
el = Py_None;
Py_INCREF(Py_None);
}
PyTuple_SET_ITEM(ret,pix++,el); // reference stolen
}
}
return ret;
}
inline bool issym(PyObject *p)
{
return PyString_Check(p) || pySymbol_Check(p);
}
inline bool isseq(PyObject *p)
{
return PySequence_Check(p) && !issym(p);
}
const t_symbol *pybase::getone(t_atom &at,PyObject *arg)
{
if(PyInt_Check(arg)) { flext::SetInt(at,PyInt_AsLong(arg)); return sym_fint; }
else if(PyLong_Check(arg)) { flext::SetInt(at,PyLong_AsLong(arg)); return sym_fint; }
else if(PyFloat_Check(arg)) { flext::SetFloat(at,(float)PyFloat_AsDouble(arg)); return flext::sym_float; }
else if(pySymbol_Check(arg)) { flext::SetSymbol(at,pySymbol_AS_SYMBOL(arg)); return flext::sym_symbol; }
else if(PyString_Check(arg)) { flext::SetString(at,PyString_AS_STRING(arg)); return flext::sym_symbol; }
else {
PyObject *tp = PyObject_Type(arg);
PyObject *stp = tp?PyObject_Str(tp):NULL;
char *tmp = "";
if(stp) tmp = PyString_AS_STRING(stp);
flext::post("py/pyext: Could not convert argument %s",tmp);
Py_XDECREF(stp);
Py_XDECREF(tp);
flext::SetSymbol(at,flext::sym__);
return sym_symbol;
}
}
const t_symbol *pybase::getlist(t_atom *lst,PyObject *seq,int cnt,int offs)
{
for(int ix = 0; ix < cnt; ++ix) {
PyObject *arg = PySequence_GetItem(seq,ix+offs); // new reference
getone(lst[ix],arg);
Py_DECREF(arg);
}
return flext::sym_list;
}
const t_symbol *pybase::GetPyArgs(AtomList &lst,PyObject *pValue,int offs)
{
if(pValue == NULL) return false;
// output bang on None returned
if(pValue == Py_None) return sym_bang;
// analyze return value or tuple
const t_symbol *sym = NULL;
if(isseq(pValue)) {
// Python might crash here if pValue is no "real" sequence, but rather e.g. an instance
int rargc = PySequence_Size(pValue);
if(rargc == 2) {
// check if syntax is symbol/string, list -> anything message
PyObject *s = PySequence_GetItem(pValue,0);
PyObject *l = PySequence_GetItem(pValue,1);
if(issym(s) && isseq(l)) {
// is anything message
rargc = PySequence_Size(l);
lst(offs+rargc);
getlist(lst.Atoms(),l,rargc);
sym = pyObject_AsSymbol(s);
}
else {
// (symbol,atom) list
lst(offs+rargc);
sym = getlist(lst.Atoms(),pValue,rargc);
}
Py_DECREF(s);
Py_DECREF(l);
}
else {
lst(offs+rargc);
sym = getlist(lst.Atoms(),pValue,rargc);
}
}
else {
lst(offs+1);
sym = getone(lst[offs],pValue);
}
return sym;
}
const t_symbol *pybase::GetPyAtom(AtomList &lst,PyObject *obj)
{
size_t atom = PyAtom::Register(obj);
size_t szat = sizeof(atom)/2;
lst(szat);
for(size_t i = 0; i < szat; ++i,atom >>= 16)
flext::SetInt(lst[i],(int)(atom&((1<<16)-1)));
return symatom;
}
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