| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.dexgen.dex.file; |
| |
| import com.android.dexgen.rop.cst.CstType; |
| import com.android.dexgen.rop.cst.CstUtf8; |
| import com.android.dexgen.rop.type.Prototype; |
| import com.android.dexgen.rop.type.StdTypeList; |
| import com.android.dexgen.rop.type.Type; |
| import com.android.dexgen.util.AnnotatedOutput; |
| import com.android.dexgen.util.Hex; |
| |
| /** |
| * Representation of a method prototype reference inside a Dalvik file. |
| */ |
| public final class ProtoIdItem extends IndexedItem { |
| /** size of instances when written out to a file, in bytes */ |
| public static final int WRITE_SIZE = 12; |
| |
| /** {@code non-null;} the wrapped prototype */ |
| private final Prototype prototype; |
| |
| /** {@code non-null;} the short-form of the prototype */ |
| private final CstUtf8 shortForm; |
| |
| /** |
| * {@code null-ok;} the list of parameter types or {@code null} if this |
| * prototype has no parameters |
| */ |
| private TypeListItem parameterTypes; |
| |
| /** |
| * Constructs an instance. |
| * |
| * @param prototype {@code non-null;} the constant for the prototype |
| */ |
| public ProtoIdItem(Prototype prototype) { |
| if (prototype == null) { |
| throw new NullPointerException("prototype == null"); |
| } |
| |
| this.prototype = prototype; |
| this.shortForm = makeShortForm(prototype); |
| |
| StdTypeList parameters = prototype.getParameterTypes(); |
| this.parameterTypes = (parameters.size() == 0) ? null |
| : new TypeListItem(parameters); |
| } |
| |
| /** |
| * Creates the short-form of the given prototype. |
| * |
| * @param prototype {@code non-null;} the prototype |
| * @return {@code non-null;} the short form |
| */ |
| private static CstUtf8 makeShortForm(Prototype prototype) { |
| StdTypeList parameters = prototype.getParameterTypes(); |
| int size = parameters.size(); |
| StringBuilder sb = new StringBuilder(size + 1); |
| |
| sb.append(shortFormCharFor(prototype.getReturnType())); |
| |
| for (int i = 0; i < size; i++) { |
| sb.append(shortFormCharFor(parameters.getType(i))); |
| } |
| |
| return new CstUtf8(sb.toString()); |
| } |
| |
| /** |
| * Gets the short-form character for the given type. |
| * |
| * @param type {@code non-null;} the type |
| * @return the corresponding short-form character |
| */ |
| private static char shortFormCharFor(Type type) { |
| char descriptorChar = type.getDescriptor().charAt(0); |
| |
| if (descriptorChar == '[') { |
| return 'L'; |
| } |
| |
| return descriptorChar; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public ItemType itemType() { |
| return ItemType.TYPE_PROTO_ID_ITEM; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int writeSize() { |
| return WRITE_SIZE; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void addContents(DexFile file) { |
| StringIdsSection stringIds = file.getStringIds(); |
| TypeIdsSection typeIds = file.getTypeIds(); |
| MixedItemSection typeLists = file.getTypeLists(); |
| |
| typeIds.intern(prototype.getReturnType()); |
| stringIds.intern(shortForm); |
| |
| if (parameterTypes != null) { |
| parameterTypes = typeLists.intern(parameterTypes); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void writeTo(DexFile file, AnnotatedOutput out) { |
| int shortyIdx = file.getStringIds().indexOf(shortForm); |
| int returnIdx = file.getTypeIds().indexOf(prototype.getReturnType()); |
| int paramsOff = OffsettedItem.getAbsoluteOffsetOr0(parameterTypes); |
| |
| if (out.annotates()) { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(prototype.getReturnType().toHuman()); |
| sb.append(" proto("); |
| |
| StdTypeList params = prototype.getParameterTypes(); |
| int size = params.size(); |
| |
| for (int i = 0; i < size; i++) { |
| if (i != 0) { |
| sb.append(", "); |
| } |
| sb.append(params.getType(i).toHuman()); |
| } |
| |
| sb.append(")"); |
| out.annotate(0, indexString() + ' ' + sb.toString()); |
| out.annotate(4, " shorty_idx: " + Hex.u4(shortyIdx) + |
| " // " + shortForm.toQuoted()); |
| out.annotate(4, " return_type_idx: " + Hex.u4(returnIdx) + |
| " // " + prototype.getReturnType().toHuman()); |
| out.annotate(4, " parameters_off: " + Hex.u4(paramsOff)); |
| } |
| |
| out.writeInt(shortyIdx); |
| out.writeInt(returnIdx); |
| out.writeInt(paramsOff); |
| } |
| } |