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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package com.oracle.graal.python.builtins.objects.memoryview;

import static com.oracle.graal.python.nodes.SpecialMethodNames.__GETITEM__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.__HASH__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.__ITER__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.__LEN__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.__REPR__;
import static com.oracle.graal.python.runtime.exception.PythonErrorType.TypeError;

import java.util.List;

import com.oracle.graal.python.builtins.Builtin;
import com.oracle.graal.python.builtins.CoreFunctions;
import com.oracle.graal.python.builtins.PythonBuiltinClassType;
import com.oracle.graal.python.builtins.PythonBuiltins;
import com.oracle.graal.python.builtins.objects.PNone;
import com.oracle.graal.python.builtins.objects.ints.PInt;
import com.oracle.graal.python.nodes.ErrorMessages;
import com.oracle.graal.python.nodes.PGuards;
import com.oracle.graal.python.nodes.call.special.LookupAndCallBinaryNode;
import com.oracle.graal.python.nodes.call.special.LookupAndCallUnaryNode;
import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
import com.oracle.graal.python.nodes.function.PythonBuiltinNode;
import com.oracle.graal.python.nodes.function.builtins.PythonBinaryBuiltinNode;
import com.oracle.graal.python.nodes.function.builtins.PythonUnaryBuiltinNode;
import com.oracle.graal.python.nodes.truffle.PythonArithmeticTypes;
import com.oracle.graal.python.builtins.Python3Core;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Fallback;
import com.oracle.truffle.api.dsl.GenerateNodeFactory;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.dsl.TypeSystemReference;
import com.oracle.truffle.api.frame.VirtualFrame;

@CoreFunctions(extendClasses = PythonBuiltinClassType.PBuffer)
public class BufferBuiltins extends PythonBuiltins {

    @Override
    public void initialize(Python3Core core) {
        super.initialize(core);
        builtinConstants.put(__HASH__, PNone.NONE);
    }

    @Override
    protected List<com.oracle.truffle.api.dsl.NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
        return BufferBuiltinsFactory.getFactories();
    }

    @Builtin(name = __REPR__, minNumOfPositionalArgs = 1)
    @GenerateNodeFactory
    abstract static class ReprNode extends PythonUnaryBuiltinNode {

        @Specialization
        static Object repr(VirtualFrame frame, PBuffer self,
                        @Cached("create(Repr)") LookupAndCallUnaryNode repr) {
            return createReprString(repr.executeObject(frame, self.getDelegate()));
        }

        @TruffleBoundary
        private static String createReprString(Object reprObj) {
            return "buffer(" + reprObj + ")";
        }
    }

    @Builtin(name = __GETITEM__, minNumOfPositionalArgs = 2)
    @TypeSystemReference(PythonArithmeticTypes.class)
    @GenerateNodeFactory
    public abstract static class GetItemNode extends PythonBinaryBuiltinNode {

        @Specialization
        public static Object iter(VirtualFrame frame, PBuffer self, boolean key,
                        @Cached("create(GetItem)") LookupAndCallBinaryNode callGetItemNode) {
            return callGetItemNode.executeObject(frame, self.getDelegate(), key);
        }

        @Specialization
        public static Object iter(VirtualFrame frame, PBuffer self, int key,
                        @Cached("create(GetItem)") LookupAndCallBinaryNode callGetItemNode) {
            return callGetItemNode.executeObject(frame, self.getDelegate(), key);
        }

        @Specialization
        public static Object iter(VirtualFrame frame, PBuffer self, long key,
                        @Cached("create(GetItem)") LookupAndCallBinaryNode callGetItemNode) {
            return callGetItemNode.executeObject(frame, self.getDelegate(), key);
        }

        @Specialization
        public static Object iter(VirtualFrame frame, PBuffer self, PInt key,
                        @Cached("create(GetItem)") LookupAndCallBinaryNode callGetItemNode) {
            return callGetItemNode.executeObject(frame, self.getDelegate(), key);
        }

        @Fallback
        protected Object doGeneric(Object self, Object idx) {
            if (!PGuards.isInteger(idx)) {
                throw raise(TypeError, ErrorMessages.BUFFER_INDICES_MUST_BE_INTS, idx);
            }
            throw raise(TypeError, ErrorMessages.DESCRIPTOR_REQUIRES_OBJ, "__getitem__", "buffer", self);
        }
    }

    @Builtin(name = __LEN__, minNumOfPositionalArgs = 1)
    @GenerateNodeFactory
    public abstract static class LenNode extends PythonUnaryBuiltinNode {

        @Specialization
        public static Object len(VirtualFrame frame, PBuffer self,
                        @Cached("create(Len)") LookupAndCallUnaryNode callLenNode) {
            return callLenNode.executeObject(frame, self.getDelegate());
        }
    }

    @Builtin(name = __ITER__, minNumOfPositionalArgs = 1)
    @GenerateNodeFactory
    public abstract static class IterNode extends PythonBuiltinNode {

        @Specialization
        static Object doPBuffer(VirtualFrame frame, PBuffer self,
                        @Cached("create(Iter)") LookupAndCallUnaryNode callIterNode) {
            return callIterNode.executeObject(frame, self.getDelegate());
        }

        @Fallback
        static Object doGeneric(@SuppressWarnings("unused") Object self) {
            return PNone.NONE;
        }
    }
}
