traverseda
/
cpython
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Generic Abstract Object Interface

This commit is contained in:
Guido van Rossum 1995-07-18 14:12:02 +00:00
parent 3c7807937e
commit e15dee5e3c
1 changed files with 972 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

972
Objects/abstract.c Normal file
View File

@ -0,0 +1,972 @@
/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Stichting Mathematisch
Centrum or CWI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior permission.
STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
******************************************************************/
/* Abstract Object Interface (many thanks to Jim Fulton) */
#include "Python.h"
#define Py_TRY(E) if(!(E)) return NULL
#define Py_ASSERT(EXP,E,V) if(!(EXP)) return PyErr_SetString(E,V), (void*)NULL
#define SPAM printf("line %d\n",__LINE__)
static PyObject *
Py_ReturnMethodError(char *name)
{
if(! name) name = "Unknown Error";
PyErr_SetString(PyExc_AttributeError,name);
return 0;
}
PyObject *
Py_ReturnNullError()
{
if(! PyErr_Occurred())
PyErr_SetString(PyExc_SystemError,
"null argument to internal routine");
return 0;
}
int
PyObject_Cmp(PyObject *o1, PyObject *o2, int *result)
{
int r;
if(! o1 || ! o2) return Py_ReturnNullError(),-1;
r=PyObject_Compare(o1,o2);
if(PyErr_Occurred()) return -1;
*result=r;
return 0;
}
#if 0 /* Already in object.c */
int
PyCallable_Check(PyObject *x)
{
if (x == NULL)
return 0;
if (x->ob_type->tp_call != NULL ||
PyFunction_Check(x) ||
PyMethod_Check(x) ||
PyCFunction_Check(x) ||
PyClass_Check(x))
return 1;
if (PyInstance_Check(x)) {
PyObject *call = PyObject_GetAttrString(x, "__call__");
if (call == NULL) {
err_clear();
return 0;
}
/* Could test recursively but don't, for fear of endless
recursion if some joker sets self.__call__ = self */
Py_DECREF(call);
return 1;
}
return 0;
}
#endif
PyObject *
PyObject_Type(PyObject *o)
{
PyObject *v;
if(! o) return Py_ReturnNullError();
v = (PyObject *)o->ob_type;
Py_INCREF(v);
return v;
}
int
PyObject_Length(PyObject *o)
{
PySequenceMethods *m;
if(! o) return Py_ReturnNullError(),-1;
if((m=o->ob_type->tp_as_sequence) && m->sq_length)
return m->sq_length(o);
return PyMapping_Length(o);
}
PyObject *
PyObject_GetItem(PyObject *o, PyObject *key)
{
PyMappingMethods *m;
if(! o || ! key) return Py_ReturnNullError();
if((m=o->ob_type->tp_as_mapping) && m->mp_subscript)
return m->mp_subscript(o,key);
if(PyInt_Check(key))
return PySequence_GetItem(o,PyInt_AsLong(key));
PyErr_SetString(PyExc_TypeError,"expected integer index");
return NULL;
}
int
PyObject_SetItem(PyObject *o, PyObject *key, PyObject *value)
{
PyMappingMethods *m;
if(! o || ! key || ! value) return Py_ReturnNullError(),-1;
if((m=o->ob_type->tp_as_mapping) && m->mp_ass_subscript)
return m->mp_ass_subscript(o,key,value);
if(PyInt_Check(key))
return PySequence_SetItem(o,PyInt_AsLong(key),value);
PyErr_SetString(PyExc_TypeError,"expeced integer index");
return -1;
}
int
PyNumber_Check(PyObject *o)
{
return o && o->ob_type->tp_as_number;
}
#define BINOP(opname, ropname, thisfunc) \
if (!PyInstance_Check(v) && !PyInstance_Check(w)) \
; \
else \
return PyInstance_DoBinOp(v, w, opname, ropname, thisfunc)
PyObject *
PyNumber_Or(v, w)
PyObject *v, *w;
{
extern int PyNumber_Coerce();
BINOP("__or__", "__ror__", PyNumber_Or);
if (v->ob_type->tp_as_number != NULL) {
PyObject *x;
PyObject * (*f) Py_FPROTO((PyObject *, PyObject *));
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_or) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
if (f != NULL)
return x;
}
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for |");
return NULL;
}
PyObject *
PyNumber_Xor(v, w)
PyObject *v, *w;
{
extern int PyNumber_Coerce();
BINOP("__xor__", "__rxor__", PyNumber_Xor);
if (v->ob_type->tp_as_number != NULL) {
PyObject *x;
PyObject * (*f) Py_FPROTO((PyObject *, PyObject *));
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_xor) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
if (f != NULL)
return x;
}
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for ^");
return NULL;
}
PyObject *
PyNumber_And(v, w)
PyObject *v, *w;
{
BINOP("__and__", "__rand__", PyNumber_And);
if (v->ob_type->tp_as_number != NULL) {
PyObject *x;
PyObject * (*f) Py_FPROTO((PyObject *, PyObject *));
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_and) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
if (f != NULL)
return x;
}
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for &");
return NULL;
}
PyObject *
PyNumber_Lshift(v, w)
PyObject *v, *w;
{
BINOP("__lshift__", "__rlshift__", PyNumber_Lshift);
if (v->ob_type->tp_as_number != NULL) {
PyObject *x;
PyObject * (*f) Py_FPROTO((PyObject *, PyObject *));
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_lshift) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
if (f != NULL)
return x;
}
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for <<");
return NULL;
}
PyObject *
PyNumber_Rshift(v, w)
PyObject *v, *w;
{
BINOP("__rshift__", "__rrshift__", PyNumber_Rshift);
if (v->ob_type->tp_as_number != NULL) {
PyObject *x;
PyObject * (*f) Py_FPROTO((PyObject *, PyObject *));
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_rshift) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
if (f != NULL)
return x;
}
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for >>");
return NULL;
}
PyObject *
PyNumber_Add(v, w)
PyObject *v, *w;
{
BINOP("__add__", "__radd__", PyNumber_Add);
if (v->ob_type->tp_as_sequence != NULL)
return (*v->ob_type->tp_as_sequence->sq_concat)(v, w);
else if (v->ob_type->tp_as_number != NULL) {
PyObject *x;
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
x = (*v->ob_type->tp_as_number->nb_add)(v, w);
Py_DECREF(v);
Py_DECREF(w);
return x;
}
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for +");
return NULL;
}
PyObject *
PyNumber_Subtract(v, w)
PyObject *v, *w;
{
BINOP("__sub__", "__rsub__", PyNumber_Subtract);
if (v->ob_type->tp_as_number != NULL) {
PyObject *x;
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
x = (*v->ob_type->tp_as_number->nb_subtract)(v, w);
Py_DECREF(v);
Py_DECREF(w);
return x;
}
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for -");
return NULL;
}
PyObject *
PyNumber_Multiply(v, w)
PyObject *v, *w;
{
PyTypeObject *tp;
tp = v->ob_type;
BINOP("__mul__", "__rmul__", PyNumber_Multiply);
if (tp->tp_as_number != NULL &&
w->ob_type->tp_as_sequence != NULL &&
!PyInstance_Check(v)) {
/* number*sequence -- swap v and w */
PyObject *tmp = v;
v = w;
w = tmp;
tp = v->ob_type;
}
if (tp->tp_as_number != NULL) {
PyObject *x;
if (PyInstance_Check(v)) {
/* Instances of user-defined classes get their
other argument uncoerced, so they may
implement sequence*number as well as
number*number. */
Py_INCREF(v);
Py_INCREF(w);
}
else if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
x = (*v->ob_type->tp_as_number->nb_multiply)(v, w);
Py_DECREF(v);
Py_DECREF(w);
return x;
}
if (tp->tp_as_sequence != NULL) {
if (!PyInt_Check(w)) {
PyErr_SetString(PyExc_TypeError,
"can't multiply sequence with non-int");
return NULL;
}
return (*tp->tp_as_sequence->sq_repeat)
(v, (int)PyInt_AsLong(w));
}
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for *");
return NULL;
}
PyObject *
PyNumber_Divide(v, w)
PyObject *v, *w;
{
BINOP("__div__", "__rdiv__", PyNumber_Divide);
if (v->ob_type->tp_as_number != NULL) {
PyObject *x;
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
x = (*v->ob_type->tp_as_number->nb_divide)(v, w);
Py_DECREF(v);
Py_DECREF(w);
return x;
}
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for /");
return NULL;
}
PyObject *
PyNumber_Remainder(v, w)
PyObject *v, *w;
{
if (PyString_Check(v)) {
return PyString_Format(v, w);
}
BINOP("__mod__", "__rmod__", PyNumber_Remainder);
if (v->ob_type->tp_as_number != NULL) {
PyObject *x;
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
x = (*v->ob_type->tp_as_number->nb_remainder)(v, w);
Py_DECREF(v);
Py_DECREF(w);
return x;
}
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for %");
return NULL;
}
PyObject *
PyNumber_Divmod(v, w)
PyObject *v, *w;
{
PyObject *res;
if (PyInstance_Check(v) || PyInstance_Check(w))
return PyInstance_DoBinOp(v, w, "__divmod__", "__rdivmod__",
PyNumber_Divmod);
if (v->ob_type->tp_as_number == NULL ||
w->ob_type->tp_as_number == NULL) {
PyErr_SetString(PyExc_TypeError,
"divmod() requires numeric or class instance arguments");
return NULL;
}
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
res = (*v->ob_type->tp_as_number->nb_divmod)(v, w);
Py_DECREF(v);
Py_DECREF(w);
return res;
}
static PyObject *
do_pow(v, w)
PyObject *v, *w;
{
PyObject *res;
if (PyInstance_Check(v) || PyInstance_Check(w))
return PyInstance_DoBinOp(v, w, "__pow__", "__rpow__", do_pow);
if (v->ob_type->tp_as_number == NULL ||
w->ob_type->tp_as_number == NULL) {
PyErr_SetString(PyExc_TypeError,
"pow() requires numeric arguments");
return NULL;
}
if (PyFloat_Check(w) && PyFloat_AsDouble(v) < 0.0) {
if (!PyErr_Occurred())
PyErr_SetString(PyExc_ValueError,
"negative number to float power");
return NULL;
}
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
res = (*v->ob_type->tp_as_number->nb_power)(v, w, Py_None);
Py_DECREF(v);
Py_DECREF(w);
return res;
}
PyObject *
PyNumber_Power(v,w,z)
PyObject *v, *w, *z;
{
PyObject *res;
PyObject *v1, *z1, *w2, *z2;
if (z == Py_None)
return do_pow(v, w);
/* XXX The ternary version doesn't do class instance coercions */
if (PyInstance_Check(v))
return v->ob_type->tp_as_number->nb_power(v, w, z);
if (v->ob_type->tp_as_number == NULL ||
z->ob_type->tp_as_number == NULL ||
w->ob_type->tp_as_number == NULL) {
PyErr_SetString(PyExc_TypeError, "pow() requires numeric arguments");
return NULL;
}
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
res = NULL;
v1 = v;
z1 = z;
if (PyNumber_Coerce(&v1, &z1) != 0)
goto error2;
w2 = w;
z2 = z1;
if (PyNumber_Coerce(&w2, &z2) != 0)
goto error1;
res = (*v1->ob_type->tp_as_number->nb_power)(v1, w2, z2);
Py_DECREF(w2);
Py_DECREF(z2);
error1:
Py_DECREF(v1);
Py_DECREF(z1);
error2:
Py_DECREF(v);
Py_DECREF(w);
return res;
}
PyObject *
PyNumber_Negative(v)
PyObject *v;
{
if (v->ob_type->tp_as_number != NULL)
return (*v->ob_type->tp_as_number->nb_negative)(v);
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for unary -");
return NULL;
}
PyObject *
PyNumber_Positive(v)
PyObject *v;
{
if (v->ob_type->tp_as_number != NULL)
return (*v->ob_type->tp_as_number->nb_positive)(v);
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for unary +");
return NULL;
}
PyObject *
PyNumber_Invert(v)
PyObject *v;
{
PyObject * (*f) Py_FPROTO((PyObject *));
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_invert) != NULL)
return (*f)(v);
PyErr_SetString(PyExc_TypeError, "bad operand type(s) for unary ~");
return NULL;
}
PyObject *
PyNumber_Absolute(PyObject *o)
{
PyNumberMethods *m;
if(! o) return Py_ReturnNullError();
if((m=o->ob_type->tp_as_number) && m->nb_absolute)
return m->nb_absolute(o);
return Py_ReturnMethodError("__abs__");
}
PyObject *
PyNumber_Int(PyObject *o)
{
PyNumberMethods *m;
if(! o) return Py_ReturnNullError();
if((m=o->ob_type->tp_as_number) && m->nb_int)
return m->nb_int(o);
return Py_ReturnMethodError("__int__");
}
PyObject *
PyNumber_Long(PyObject *o)
{
PyNumberMethods *m;
if(! o) return Py_ReturnNullError();
if((m=o->ob_type->tp_as_number) && m->nb_long)
return m->nb_long(o);
return Py_ReturnMethodError("__long__");
}
PyObject *
PyNumber_Float(PyObject *o)
{
PyNumberMethods *m;
if(! o) return Py_ReturnNullError();
if((m=o->ob_type->tp_as_number) && m->nb_float)
return m->nb_float(o);
return Py_ReturnMethodError("__float__");
}
int
PySequence_Check(PyObject *o)
{
return o && o->ob_type->tp_as_sequence;
}
int
PySequence_Length(PyObject *s)
{
PySequenceMethods *m;
if(! s) return Py_ReturnNullError(),-1;
if((m=s->ob_type->tp_as_sequence) && m->sq_length)
return m->sq_length(s);
Py_ReturnMethodError("__len__");
return -1;
}
PyObject *
PySequence_Concat(PyObject *s, PyObject *o)
{
PySequenceMethods *m;
if(! s || ! o) return Py_ReturnNullError();
if((m=s->ob_type->tp_as_sequence) && m->sq_concat)
return m->sq_concat(s,o);
return Py_ReturnMethodError("__concat__");
}
PyObject *
PySequence_Repeat(PyObject *o, int count)
{
PySequenceMethods *m;
if(! o) return Py_ReturnNullError();
if((m=o->ob_type->tp_as_sequence) && m->sq_repeat)
return m->sq_repeat(o,count);
return Py_ReturnMethodError("__repeat__");
}
PyObject *
PySequence_GetItem(PyObject *s, int i)
{
PySequenceMethods *m;
int l;
if(! s) return Py_ReturnNullError();
if(! ((m=s->ob_type->tp_as_sequence) && m->sq_length && m->sq_item))
return Py_ReturnMethodError("__getitem__");
if(0 > (l=m->sq_length(s))) return NULL;
if(i < 0) i += l;
return m->sq_item(s,i);
}
PyObject *
PySequence_GetSlice(PyObject *s, int i1, int i2)
{
PySequenceMethods *m;
int l;
if(! s) return Py_ReturnNullError();
if(! ((m=s->ob_type->tp_as_sequence) && m->sq_length && m->sq_slice))
return Py_ReturnMethodError("__getslice__");
if(0 > (l=m->sq_length(s))) return NULL;
if(i1 < 0) i1 += l;
if(i2 < 0) i2 += l;
return m->sq_slice(s,i1,i2);
}
int
PySequence_SetItem(PyObject *s, int i, PyObject *o)
{
PySequenceMethods *m;
int l;
if(! s) return Py_ReturnNullError(),-1;
if(! ((m=s->ob_type->tp_as_sequence) && m->sq_length && m->sq_ass_item))
return Py_ReturnMethodError("__setitem__"),-1;
if(i < 0)
{
if(0 > (l=m->sq_length(s))) return -1;
i += l;
}
return m->sq_ass_item(s,i,o);
}
int
PySequence_SetSlice(PyObject *s, int i1, int i2, PyObject *o)
{
PySequenceMethods *m;
int l;
if(! s) return Py_ReturnNullError(),-1;
if(! ((m=s->ob_type->tp_as_sequence) && m->sq_length && m->sq_ass_slice))
return Py_ReturnMethodError("__setslice__"),-1;
if(0 > (l=m->sq_length(s))) return -1;
if(i1 < 0) i1 += l;
if(i2 < 0) i2 += l;
return m->sq_ass_slice(s,i1,i2,o);
}
PyObject *
PySequence_Tuple(PyObject *s)
{
int l, i;
PyObject *t, *item;
if(! s) return Py_ReturnNullError();
Py_TRY((l=PySequence_Length(s)) != -1);
Py_TRY(t=PyTuple_New(l));
for(i=0; i < l; i++)
{
if(item=PySequence_GetItem(s,i))
{
if(PyTuple_SetItem(t,i,item) == -1)
{
Py_DECREF(item);
Py_DECREF(t);
return NULL;
}
}
else
{
Py_DECREF(t);
return NULL;
}
}
return t;
}
int
PySequence_Count(PyObject *s, PyObject *o)
{
int l, i, n=0, not_equal, err;
PyObject *item;
if(! s || ! o) return Py_ReturnNullError(), -1;
Py_TRY((l=PySequence_Length(s)) != -1),-1;
for(i=0; i < l; i++)
{
Py_TRY(item=PySequence_GetItem(s,i)),-1;
err=PyObject_Cmp(item,o,&not_equal) == -1;
Py_DECREF(item);
if(err) return -1;
n += ! not_equal;
}
return n;
}
int
PySequence_In(PyObject *s, PyObject *o)
{
int l, i, not_equal, err;
PyObject *item;
if(! o || ! s) return Py_ReturnNullError(), -1;
Py_TRY((l=PySequence_Length(s)) != -1),-1;
for(i=0; i < l; i++)
{
Py_TRY(item=PySequence_GetItem(s,i)),-1;
err=PyObject_Cmp(item,o,&not_equal) == -1;
Py_DECREF(item);
if(err) return -1;
if(! not_equal) return 1;
}
return 0;
}
int
PySequence_Index(PyObject *s, PyObject *o)
{
int l, i, n=0, not_equal, err;
PyObject *item;
if(! s || ! o) return Py_ReturnNullError(), -1;
Py_TRY((l=PySequence_Length(s)) != -1),-1;
for(i=0; i < l; i++)
{
Py_TRY(item=PySequence_GetItem(s,i)),-1;
err=PyObject_Cmp(item,o,&not_equal) == -1;
Py_DECREF(item);
if(err) return -1;
if(! not_equal) return n;
}
return -1;
}
int
PyMapping_Check(PyObject *o)
{
return o && o->ob_type->tp_as_mapping;
}
int
PyMapping_Length(PyObject *s)
{
PyMappingMethods *m;
if(! s) return Py_ReturnNullError(),-1;
if((m=s->ob_type->tp_as_mapping) && m->mp_length)
return m->mp_length(s);
Py_ReturnMethodError("__len__");
return -1;
}
int
PyMapping_HasKeyString(PyObject *o, char *key)
{
PyObject *v;
v=PyMapping_GetItemString(o,key);
if(v) return 1;
err_clear();
return 0;
}
int
PyMapping_HasKey(PyObject *o, PyObject *key)
{
PyObject *v;
v=PyObject_GetItem(o,key);
if(v) return 1;
err_clear();
return 0;
}
PyObject *
PyObject_CallObject(o,a)
PyObject *o, *a;
{
PyObject *r;
if(a) return PyEval_CallObject(o,a);
if(! (a=PyTuple_New(0)))
return NULL;
r=PyEval_CallObject(o,a);
Py_DECREF(a);
return r;
}
PyObject *
#ifdef HAVE_STDARG_PROTOTYPES
/* VARARGS 2 */
PyObject_CallFunction(PyObject *callable, char *format, ...)
#else
/* VARARGS */
PyObject_CallFunction(va_alist) va_dcl
#endif
{
va_list va;
PyObject *args, *retval;
#ifdef HAVE_STDARG_PROTOTYPES
va_start(va, format);
#else
PyObject *callable;
char *format;
va_start(va);
callable = va_arg(va, PyObject *);
format = va_arg(va, char *);
#endif
if( ! callable)
{
va_end(va);
return Py_ReturnNullError();
}
if(format)
args = Py_VaBuildValue(format, va);
else
args = PyTuple_New(0);
va_end(va);
if(! args) return NULL;
if(! PyTuple_Check(args))
{
PyObject *a;
Py_TRY(a=PyTuple_New(1));
Py_TRY(PyTuple_SetItem(a,0,args) != -1);
args=a;
}
retval = PyObject_CallObject(callable,args);
Py_DECREF(args);
return retval;
}
PyObject *
#ifdef HAVE_STDARG_PROTOTYPES
/* VARARGS 2 */
PyObject_CallMethod(PyObject *o, char *name, char *format, ...)
#else
/* VARARGS */
PyObject_CallMethod(va_alist) va_dcl
#endif
{
va_list va;
PyObject *args, *method=0, *retval;
#ifdef HAVE_STDARG_PROTOTYPES
va_start(va, format);
#else
PyObject *o;
char *format;
va_start(va);
o = va_arg(va, PyObject *);
name = va_arg(va, char *);
format = va_arg(va, char *);
#endif
if( ! o || ! name)
{
va_end(va);
return Py_ReturnNullError();
}
method=PyObject_GetAttrString(o,name);
if(! method)
{
va_end(va);
PyErr_SetString(PyExc_AttributeError,name);
return 0;
}
if(! (PyCallable_Check(method)))
{
va_end(va);
PyErr_SetString(PyExc_TypeError,"call of non-callable attribute");
return 0;
}
if(format)
args = Py_VaBuildValue(format, va);
else
args = PyTuple_New(0);
va_end(va);
if(! args) return NULL;
if(! PyTuple_Check(args))
{
PyObject *a;
Py_TRY(a=PyTuple_New(1));
Py_TRY(PyTuple_SetItem(a,0,args) != -1);
args=a;
}
retval = PyObject_CallObject(method,args);
Py_DECREF(args);
Py_DECREF(method);
return retval;
}
PyObject *
PyMapping_GetItemString(PyObject *o, char *key)
{
PyObject *okey, *r;
if( ! key) return Py_ReturnNullError();
Py_TRY(okey=PyString_FromString(key));
r = PyObject_GetItem(o,okey);
Py_DECREF(okey);
return r;
}
int
PyMapping_SetItemString(PyObject *o, char *key, PyObject *value)
{
PyObject *okey;
int r;
if( ! key) return Py_ReturnNullError(),-1;
if (!(okey=PyString_FromString(key))) return -1;
r = PyObject_SetItem(o,okey,value);
Py_DECREF(okey);
return r;
}