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cpython/Modules/operator.c
Guido van Rossum 037b940cd7 Operators like __add__
1996-07-30 16:55:54 +00:00

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static char operator_doc[] = "\
Operator interface.\n\
\n\
This module exports a set of functions implemented in C corresponding\n\
to the intrinsic operators of Python. For example, operator.add(x, y)\n\
is equivalent to the expression x+y. The function names are those\n\
used for special class methods; variants without leading and trailing\n\
'__' are also provided for convenience.\n\
";
/*
Copyright
Copyright 1996 Digital Creations, L.C., 910 Princess Anne
Street, Suite 300, Fredericksburg, Virginia 22401 U.S.A. All
rights reserved. Copyright in this software is owned by DCLC,
unless otherwise indicated. Permission to use, copy and
distribute this software is hereby granted, provided that the
above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear. Note that
any product, process or technology described in this software
may be the subject of other Intellectual Property rights
reserved by Digital Creations, L.C. and are not licensed
hereunder.
Trademarks
Digital Creations & DCLC, are trademarks of Digital Creations, L.C..
All other trademarks are owned by their respective companies.
No Warranty
The software is provided "as is" without warranty of any kind,
either express or implied, including, but not limited to, the
implied warranties of merchantability, fitness for a particular
purpose, or non-infringement. This software could include
technical inaccuracies or typographical errors. Changes are
periodically made to the software; these changes will be
incorporated in new editions of the software. DCLC may make
improvements and/or changes in this software at any time
without notice.
Limitation Of Liability
In no event will DCLC be liable for direct, indirect, special,
incidental, economic, cover, or consequential damages arising
out of the use of or inability to use this software even if
advised of the possibility of such damages. Some states do not
allow the exclusion or limitation of implied warranties or
limitation of liability for incidental or consequential
damages, so the above limitation or exclusion may not apply to
you.
If you have questions regarding this software,
contact:
Jim Fulton, jim@digicool.com
Digital Creations L.C.
(540) 371-6909
Modifications
Renamed and slightly rearranged by Guido van Rossum
*/
#include "Python.h"
#define spam1(OP,AOP) static PyObject *OP(s,a) PyObject *s, *a; { \
PyObject *a1; \
if(! PyArg_ParseTuple(a,"O",&a1)) return NULL; \
return AOP(a1); }
#define spam2(OP,AOP) static PyObject *OP(s,a) PyObject *s, *a; { \
PyObject *a1, *a2; \
if(! PyArg_ParseTuple(a,"OO",&a1,&a2)) return NULL; \
return AOP(a1,a2); }
#define spamoi(OP,AOP) static PyObject *OP(s,a) PyObject *s, *a; { \
PyObject *a1; int a2; \
if(! PyArg_ParseTuple(a,"Oi",&a1,&a2)) return NULL; \
return AOP(a1,a2); }
#define spam2n(OP,AOP) static PyObject *OP(s,a) PyObject *s, *a; { \
PyObject *a1, *a2; \
if(! PyArg_ParseTuple(a,"OO",&a1,&a2)) return NULL; \
if(-1 == AOP(a1,a2)) return NULL; \
Py_INCREF(Py_None); \
return Py_None; }
#define spam3n(OP,AOP) static PyObject *OP(s,a) PyObject *s, *a; { \
PyObject *a1, *a2, *a3; \
if(! PyArg_ParseTuple(a,"OOO",&a1,&a2,&a3)) return NULL; \
if(-1 == AOP(a1,a2,a3)) return NULL; \
Py_INCREF(Py_None); \
return Py_None; }
#define spami(OP,AOP) static PyObject *OP(s,a) PyObject *s, *a; { \
PyObject *a1; long r; \
if(! PyArg_ParseTuple(a,"O",&a1)) return NULL; \
if(-1 == (r=AOP(a1))) return NULL; \
return PyInt_FromLong(r); }
#define spami2(OP,AOP) static PyObject *OP(s,a) PyObject *s, *a; { \
PyObject *a1, *a2; long r; \
if(! PyArg_ParseTuple(a,"OO",&a1,&a2)) return NULL; \
if(-1 == (r=AOP(a1,a2))) return NULL; \
return PyInt_FromLong(r); }
spami(isCallable , PyCallable_Check)
spami(isNumberType , PyNumber_Check)
spami(truth , PyObject_IsTrue)
spam2(__add , PyNumber_Add)
spam2(__sub , PyNumber_Subtract)
spam2(__mul , PyNumber_Multiply)
spam2(__div , PyNumber_Divide)
spam2(__mod , PyNumber_Remainder)
spam1(__neg , PyNumber_Negative)
spam1(__pos , PyNumber_Positive)
spam1(__abs , PyNumber_Absolute)
spam1(__inv , PyNumber_Invert)
spam2(__lshift , PyNumber_Lshift)
spam2(__rshift , PyNumber_Rshift)
spam2(__and , PyNumber_And)
spam2(__xor , PyNumber_Xor)
spam2(__or , PyNumber_Or)
spami(isSequenceType , PySequence_Check)
spam2(__concat , PySequence_Concat)
spamoi(__repeat , PySequence_Repeat)
spami2(sequenceIncludes, PySequence_In)
spami2(indexOf , PySequence_Index)
spami2(countOf , PySequence_Count)
spami(isMappingType , PyMapping_Check)
spam2(__getitem , PyObject_GetItem)
spam3n(__setitem , PyObject_SetItem)
static PyObject*
__getslice(s,a)
PyObject *s, *a;
{
PyObject *a1;
long a2,a3;
if(! PyArg_ParseTuple(a,"Oii",&a1,&a2,&a3)) return NULL;
return PySequence_GetSlice(a1,a2,a3);
}
static PyObject*
__setslice(s,a)
PyObject *s, *a;
{
PyObject *a1, *a4;
long a2,a3;
if(! PyArg_ParseTuple(a,"OiiO",&a1,&a2,&a3,&a4)) return NULL;
if(-1 == PySequence_SetSlice(a1,a2,a3,a4)) return NULL;
Py_INCREF(Py_None);
return Py_None;
}
#undef spam1
#undef spam2
#define spam1(OP,DOC) {#OP, OP, 1, #OP "(o) -- " DOC},
#define spam2(OP,DOC) {#OP, OP, 1, #OP "(a,b) -- " DOC},
#define spam3(OP,DOC) {#OP, OP, 1, #OP "(a,b,c) -- " DOC},
static struct PyMethodDef operator_methods[] = {
spam1(isCallable , "Return 1 if o is callable, and zero otherwise.")
spam1(isNumberType , "Return 1 if o has a numeric type, and zero otherwise.")
spam1(isSequenceType , "Return 1 if o has a sequence type, and zero otherwise.")
spam1(truth , "Return 1 if o is true, and 0 otherwise.")
spam2(sequenceIncludes, "Return 1 is a includes b, and 0 otherwise.")
spam2(indexOf , "Return the index of b in a.")
spam2(countOf , "Return the number of times b occurs in a.")
spam1(isMappingType , "Return 1 if o has a mapping type, and zero otherwise.")
#undef spam1
#undef spam2
#undef spam3
#define spam1(OP,DOC) {#OP, __ ## OP, 1, #OP "(o) -- " DOC}, \
{"__" #OP "__", __ ## OP, 1, #OP "(o) -- " DOC},
#define spam2(OP,DOC) {#OP, __ ## OP, 1, #OP "(a,b) -- " DOC}, \
{"__" #OP "__", __ ## OP, 1, #OP "(a,b) -- " DOC},
#define spam3(OP,DOC) {#OP, __ ## OP, 1, #OP "(a,b,c) -- " DOC}, \
{"__" #OP "__", __ ## OP, 1, #OP "(a,b,c) -- " DOC},
#define spam4(OP,DOC) {#OP, __ ## OP, 1, #OP "(a,b,c,v) -- " DOC}, \
{"__" #OP "__", __ ## OP, 1, #OP "(a,b,c,v) -- " DOC},
spam2(add , "Return a + b, for a and b numbers.")
spam2(sub , "Return a - b.")
spam2(mul , "Return a * b, for a and b numbers.")
spam2(div , "Return a / b.")
spam2(mod , "Return a % b.")
spam1(neg , "Return o negated.")
spam1(pos , "Return o positive.")
spam1(abs , "Return the absolute value of o.")
spam1(inv , "Return the inverse of o.")
spam2(lshift , "Return a shifted left by b.")
spam2(rshift , "Return a shifted right by b.")
spam2(and , "Return the bitwise and of a and b.")
spam2(xor , "Return the bitwise exclusive-or of a and b.")
spam2(or , "Return the bitwise or of a and b.")
spam2(concat , "Return a + b, for a and b sequences.")
spam2(repeat , "Return a + b, where a is a sequence, and b is an "
"integer.")
spam2(getitem , "Return the value of a at index b.")
spam3(setitem , "Set the value of a at b to c.")
spam2(getslice , "Return the slice of a from b to c-1.")
spam4(setslice , "Set the slice of a from b to c-1 to the sequence, v.")
{NULL, NULL} /* sentinel */
};
/* Initialization function for the module (*must* be called initoperator) */
void
initoperator()
{
PyObject *m, *d;
/* Create the module and add the functions */
m = Py_InitModule4("operator", operator_methods,
operator_doc,
(PyObject*)NULL,PYTHON_API_VERSION);
/* Add some symbolic constants to the module */
d = PyModule_GetDict(m);
PyDict_SetItemString(d, "__version__",PyString_FromString("$Rev$"));
/* Check for errors */
if (PyErr_Occurred())
Py_FatalError("can't initialize module operator");
}
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