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/*
py/pyext - python script object for PD and Max/MSP
Copyright (c)2002-2007 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 "pyprefix.h"
#include "pysymbol.h"
inline pySymbol *symbol_newsym(const t_symbol *sym)
{
pySymbol *self = (pySymbol *)pySymbol_Type.tp_alloc(&pySymbol_Type, 0);
if(self) self->sym = sym;
return self;
}
static PyObject *symbol_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
return (PyObject *)symbol_newsym(flext::sym__);
}
static int symbol_init(PyObject *self, PyObject *args, PyObject *kwds)
{
FLEXT_ASSERT(pySymbol_Check(self));
PyObject *arg = PySequence_GetItem(args,0); // new reference
if(!arg) return -1;
int ret = 0;
if(pySymbol_Check(arg))
((pySymbol *)self)->sym = pySymbol_AS_SYMBOL(arg);
else if(PyString_Check(arg))
((pySymbol *)self)->sym = flext::MakeSymbol(PyString_AS_STRING(arg));
else {
PyErr_SetString(PyExc_TypeError,"string or symbol argument expected");
ret = -1;
}
Py_DECREF(arg);
return ret;
}
static PyObject *symbol_str(PyObject *self)
{
FLEXT_ASSERT(pySymbol_Check(self));
return (PyObject *)PyString_FromString(pySymbol_AS_STRING(self));
}
static PyObject *symbol_repr(PyObject *self)
{
FLEXT_ASSERT(pySymbol_Check(self));
return (PyObject *)PyString_FromFormat("<Symbol %s>",pySymbol_AS_STRING(self));
}
static PyObject *symbol_richcompare(PyObject *a,PyObject *b,int cmp)
{
if(pySymbol_Check(a) && pySymbol_Check(b)) {
const t_symbol *asym = pySymbol_AS_SYMBOL(a);
const t_symbol *bsym = pySymbol_AS_SYMBOL(b);
int res = asym == bsym?0:strcmp(flext::GetString(asym),flext::GetString(bsym));
bool ret;
switch(cmp) {
case Py_LT: ret = res < 0; break;
case Py_LE: ret = res <= 0; break;
case Py_EQ: ret = res == 0; break;
case Py_NE: ret = res != 0; break;
case Py_GE: ret = res >= 0; break;
case Py_GT: ret = res > 0; break;
default:
FLEXT_ASSERT(false);
}
return PyBool_FromLong(ret);
}
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
static long symbol_hash(PyObject *self)
{
FLEXT_ASSERT(pySymbol_Check(self));
return (long)pySymbol_AS_SYMBOL(self);
}
static int symbol_length(pySymbol *self)
{
return strlen(flext::GetString(self->sym));
}
static PyObject *symbol_item(pySymbol *self, int i)
{
const char *str = flext::GetString(self->sym);
int len = strlen(str);
if(i < 0) i += len;
if(i >= 0 && i < len)
return PyString_FromStringAndSize(str+i,1);
else {
Py_INCREF(Py_None);
return Py_None;
}
}
static PyObject *symbol_slice(pySymbol *self,int ilow = 0,int ihigh = 1<<(sizeof(int)*8-2))
{
const char *str = flext::GetString(self->sym);
int len = strlen(str);
if(ilow < 0) {
ilow += len;
if(ilow < 0) ilow = 0;
}
if(ihigh < 0) ihigh += len;
if(ihigh >= len) ihigh = len-1;
return PyString_FromStringAndSize(str+ilow,ilow <= ihigh?ihigh-ilow+1:0);
}
static PyObject *symbol_concat(pySymbol *self,PyObject *op)
{
PyObject *nobj = symbol_slice(self); // take all
if(nobj) {
PyObject *ret = PySequence_Concat(nobj,op);
Py_DECREF(nobj);
return ret;
}
else
return NULL;
}
static PyObject *symbol_repeat(pySymbol *self,int rep)
{
PyObject *nobj = symbol_slice(self); // take all
if(nobj) {
PyObject *ret = PySequence_Repeat(nobj,rep);
Py_DECREF(nobj);
return ret;
}
else
return NULL;
}
static PySequenceMethods symbol_as_seq = {
(inquiry)symbol_length, /* inquiry sq_length; __len__ */
(binaryfunc)symbol_concat, /* __add__ */
(intargfunc)symbol_repeat, /* __mul__ */
(intargfunc)symbol_item, /* intargfunc sq_item; __getitem__ */
(intintargfunc)symbol_slice, /* intintargfunc sq_slice; __getslice__ */
NULL, /* intobjargproc sq_ass_item; __setitem__ */
NULL, /* intintobjargproc sq_ass_slice; __setslice__ */
};
static PyObject *symbol_iter(PyObject *obj)
{
pySymbol *self = (pySymbol *)obj;
PyObject *nobj = symbol_slice(self);
if(nobj) {
PyObject *it = PyObject_GetIter(nobj);
Py_DECREF(nobj);
return it;
}
else
return NULL;
}
PyTypeObject pySymbol_Type = {
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"Symbol", /*tp_name*/
sizeof(pySymbol), /*tp_basicsize*/
0, /*tp_itemsize*/
0, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
symbol_repr, /*tp_repr*/
0, /*tp_as_number*/
&symbol_as_seq, /*tp_as_sequence*/
0, /*tp_as_mapping*/
symbol_hash, /*tp_hash */
0, /*tp_call*/
symbol_str, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT /*| Py_TPFLAGS_BASETYPE*/, /*tp_flags*/
"Symbol objects", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
symbol_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset */
symbol_iter, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
symbol_init, /* tp_init */
0, /* tp_alloc */
symbol_new, /* tp_new */
};
pySymbol *pySymbol__;
pySymbol *pySymbol_bang;
pySymbol *pySymbol_list;
pySymbol *pySymbol_symbol;
pySymbol *pySymbol_float;
pySymbol *pySymbol_int;
void initsymbol()
{
if(PyType_Ready(&pySymbol_Type) < 0)
return;
Py_INCREF(&pySymbol_Type);
// initialize predefined objects
pySymbol__ = symbol_newsym(flext::sym__);
pySymbol_bang = symbol_newsym(flext::sym_bang);
pySymbol_list = symbol_newsym(flext::sym_list);
pySymbol_symbol = symbol_newsym(flext::sym_symbol);
pySymbol_float = symbol_newsym(flext::sym_float);
pySymbol_int = symbol_newsym(flext::sym_int);
}
PyObject *pySymbol_FromSymbol(const t_symbol *sym)
{
pySymbol *op;
if(sym == flext::sym__)
Py_INCREF(op = pySymbol__);
else if(sym == flext::sym_bang)
Py_INCREF(op = pySymbol_bang);
else if(sym == flext::sym_list)
Py_INCREF(op = pySymbol_list);
else if(sym == flext::sym_symbol)
Py_INCREF(op = pySymbol_symbol);
else if(sym == flext::sym_float)
Py_INCREF(op = pySymbol_float);
else if(sym == flext::sym_int)
Py_INCREF(op = pySymbol_int);
else
op = symbol_newsym(sym);
return (PyObject *)op;
}
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