| /* |
| * Copyright (C) 2007 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.dx.dex.file; |
| |
| import com.android.dex.DexFormat; |
| import com.android.dex.SizeOf; |
| import com.android.dx.rop.cst.CstString; |
| import com.android.dx.util.AnnotatedOutput; |
| import com.android.dx.util.Hex; |
| |
| /** |
| * File header section of a {@code .dex} file. |
| */ |
| public final class HeaderItem extends IndexedItem { |
| /** |
| * Constructs an instance. |
| */ |
| public HeaderItem() { |
| // This space intentionally left blank. |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public ItemType itemType() { |
| return ItemType.TYPE_HEADER_ITEM; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int writeSize() { |
| return SizeOf.HEADER_ITEM; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void addContents(DexFile file) { |
| // Nothing to do here. |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void writeTo(DexFile file, AnnotatedOutput out) { |
| int mapOff = file.getMap().getFileOffset(); |
| Section firstDataSection = file.getFirstDataSection(); |
| Section lastDataSection = file.getLastDataSection(); |
| int dataOff = firstDataSection.getFileOffset(); |
| int dataSize = lastDataSection.getFileOffset() + |
| lastDataSection.writeSize() - dataOff; |
| |
| String magic = file.getDexOptions().getMagic(); |
| |
| if (out.annotates()) { |
| out.annotate(8, "magic: " + new CstString(magic).toQuoted()); |
| out.annotate(4, "checksum"); |
| out.annotate(20, "signature"); |
| out.annotate(4, "file_size: " + |
| Hex.u4(file.getFileSize())); |
| out.annotate(4, "header_size: " + Hex.u4(SizeOf.HEADER_ITEM)); |
| out.annotate(4, "endian_tag: " + Hex.u4(DexFormat.ENDIAN_TAG)); |
| out.annotate(4, "link_size: 0"); |
| out.annotate(4, "link_off: 0"); |
| out.annotate(4, "map_off: " + Hex.u4(mapOff)); |
| } |
| |
| // Write the magic number. |
| for (int i = 0; i < 8; i++) { |
| out.writeByte(magic.charAt(i)); |
| } |
| |
| // Leave space for the checksum and signature. |
| out.writeZeroes(24); |
| |
| out.writeInt(file.getFileSize()); |
| out.writeInt(SizeOf.HEADER_ITEM); |
| out.writeInt(DexFormat.ENDIAN_TAG); |
| |
| /* |
| * Write zeroes for the link size and data, as the output |
| * isn't a staticly linked file. |
| */ |
| out.writeZeroes(8); |
| |
| out.writeInt(mapOff); |
| |
| // Write out each section's respective header part. |
| file.getStringIds().writeHeaderPart(out); |
| file.getTypeIds().writeHeaderPart(out); |
| file.getProtoIds().writeHeaderPart(out); |
| file.getFieldIds().writeHeaderPart(out); |
| file.getMethodIds().writeHeaderPart(out); |
| file.getClassDefs().writeHeaderPart(out); |
| |
| if (out.annotates()) { |
| out.annotate(4, "data_size: " + Hex.u4(dataSize)); |
| out.annotate(4, "data_off: " + Hex.u4(dataOff)); |
| } |
| |
| out.writeInt(dataSize); |
| out.writeInt(dataOff); |
| } |
| } |