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