1be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver/* 2be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * Copyright 2012, Google Inc. 3be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * All rights reserved. 4be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * 5be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * Redistribution and use in source and binary forms, with or without 6be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * modification, are permitted provided that the following conditions are 7be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * met: 8be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * 9be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * * Redistributions of source code must retain the above copyright 10be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * notice, this list of conditions and the following disclaimer. 11be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * * Redistributions in binary form must reproduce the above 12be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * copyright notice, this list of conditions and the following disclaimer 13be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * in the documentation and/or other materials provided with the 14be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * distribution. 15be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * * Neither the name of Google Inc. nor the names of its 16be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * contributors may be used to endorse or promote products derived from 17be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * this software without specific prior written permission. 18be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * 19be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver */ 31be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 32be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruverpackage org.jf.dexlib2.dexbacked; 33be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 34f81150ad43efac4d590f6b7ea1425896b7ffb011Ben Gruverimport org.jf.dexlib2.base.reference.BaseFieldReference; 35e8158c86efe5494fb5b369e096c7a857623a1b11Ben Gruverimport org.jf.dexlib2.dexbacked.raw.FieldIdItem; 36be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruverimport org.jf.dexlib2.dexbacked.util.AnnotationsDirectory; 37be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruverimport org.jf.dexlib2.dexbacked.util.StaticInitialValueIterator; 38a8e05220c14778d93c97911044ff5124aadbd77cBen Gruverimport org.jf.dexlib2.iface.ClassDef; 39be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruverimport org.jf.dexlib2.iface.Field; 407c71ad420dbdfe2e36f205d335a261435181a25bBen Gruverimport org.jf.dexlib2.iface.value.EncodedValue; 41be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 42be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruverimport javax.annotation.Nonnull; 43be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruverimport javax.annotation.Nullable; 4422c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruverimport java.util.Set; 45be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 46f81150ad43efac4d590f6b7ea1425896b7ffb011Ben Gruverpublic class DexBackedField extends BaseFieldReference implements Field { 4784c1762a62d7fc6638432c6c56e0422aa8cc6939Ben Gruver @Nonnull public final DexBackedDexFile dexFile; 48a8e05220c14778d93c97911044ff5124aadbd77cBen Gruver @Nonnull public final ClassDef classDef; 49be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 50be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver public final int accessFlags; 517c71ad420dbdfe2e36f205d335a261435181a25bBen Gruver @Nullable public final EncodedValue initialValue; 52be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver public final int annotationSetOffset; 53be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 54be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver public final int fieldIndex; 55be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 56d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver private int fieldIdItemOffset; 57d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver 5836e2ee200517b36652a6e8fe1c5aa24ce249765eBen Gruver public DexBackedField(@Nonnull DexReader reader, 59a8e05220c14778d93c97911044ff5124aadbd77cBen Gruver @Nonnull DexBackedClassDef classDef, 60be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver int previousFieldIndex, 61be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver @Nonnull StaticInitialValueIterator staticInitialValueIterator, 62be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver @Nonnull AnnotationsDirectory.AnnotationIterator annotationIterator) { 6384c1762a62d7fc6638432c6c56e0422aa8cc6939Ben Gruver this.dexFile = reader.dexBuf; 64a8e05220c14778d93c97911044ff5124aadbd77cBen Gruver this.classDef = classDef; 65be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 6645b8a4dae8176ad7a8cfb0ee0bc79354ac8c60b6Ben Gruver // large values may be used for the index delta, which cause the cumulative index to overflow upon 6745b8a4dae8176ad7a8cfb0ee0bc79354ac8c60b6Ben Gruver // addition, effectively allowing out of order entries. 6845b8a4dae8176ad7a8cfb0ee0bc79354ac8c60b6Ben Gruver int fieldIndexDiff = reader.readLargeUleb128(); 69be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver this.fieldIndex = fieldIndexDiff + previousFieldIndex; 7036e2ee200517b36652a6e8fe1c5aa24ce249765eBen Gruver this.accessFlags = reader.readSmallUleb128(); 71be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 72be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver this.annotationSetOffset = annotationIterator.seekTo(fieldIndex); 73be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver this.initialValue = staticInitialValueIterator.getNextOrNull(); 74d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver } 75be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 760a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver public DexBackedField(@Nonnull DexReader reader, 770a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver @Nonnull DexBackedClassDef classDef, 780a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver int previousFieldIndex, 790a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver @Nonnull AnnotationsDirectory.AnnotationIterator annotationIterator) { 800a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver this.dexFile = reader.dexBuf; 810a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver this.classDef = classDef; 820a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver 8345b8a4dae8176ad7a8cfb0ee0bc79354ac8c60b6Ben Gruver // large values may be used for the index delta, which cause the cumulative index to overflow upon 8445b8a4dae8176ad7a8cfb0ee0bc79354ac8c60b6Ben Gruver // addition, effectively allowing out of order entries. 8545b8a4dae8176ad7a8cfb0ee0bc79354ac8c60b6Ben Gruver int fieldIndexDiff = reader.readLargeUleb128(); 860a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver this.fieldIndex = fieldIndexDiff + previousFieldIndex; 870a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver this.accessFlags = reader.readSmallUleb128(); 880a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver 890a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver this.annotationSetOffset = annotationIterator.seekTo(fieldIndex); 900a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver this.initialValue = null; 910a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver } 920a18ea7f8b62e51945a79ac37802133a24c9a742Ben Gruver 93d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver @Nonnull 94d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver @Override 95d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver public String getName() { 96e8158c86efe5494fb5b369e096c7a857623a1b11Ben Gruver return dexFile.getString(dexFile.readSmallUint(getFieldIdItemOffset() + FieldIdItem.NAME_OFFSET)); 97d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver } 98d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver 99d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver @Nonnull 100d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver @Override 101d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver public String getType() { 102e8158c86efe5494fb5b369e096c7a857623a1b11Ben Gruver return dexFile.getType(dexFile.readUshort(getFieldIdItemOffset() + FieldIdItem.TYPE_OFFSET)); 103be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver } 104be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 10522c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruver @Nonnull @Override public String getDefiningClass() { return classDef.getType(); } 106be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver @Override public int getAccessFlags() { return accessFlags; } 1077c71ad420dbdfe2e36f205d335a261435181a25bBen Gruver @Nullable @Override public EncodedValue getInitialValue() { return initialValue; } 108be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 109be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver @Nonnull 110be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver @Override 11122c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruver public Set<? extends DexBackedAnnotation> getAnnotations() { 11284c1762a62d7fc6638432c6c56e0422aa8cc6939Ben Gruver return AnnotationsDirectory.getAnnotations(dexFile, annotationSetOffset); 113be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver } 114be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver 115be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver /** 116be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * Skips the reader over the specified number of encoded_field structures 117be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * 11836e2ee200517b36652a6e8fe1c5aa24ce249765eBen Gruver * @param reader The reader to skip 119be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver * @param count The number of encoded_field structures to skip over 120be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver */ 121f939e912b53bccab66013c694442fa2f40d970e1Ben Gruver public static void skipFields(@Nonnull DexReader reader, int count) { 122be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver for (int i=0; i<count; i++) { 12336e2ee200517b36652a6e8fe1c5aa24ce249765eBen Gruver reader.skipUleb128(); 12436e2ee200517b36652a6e8fe1c5aa24ce249765eBen Gruver reader.skipUleb128(); 125be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver } 126be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver } 127d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver 128d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver private int getFieldIdItemOffset() { 129d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver if (fieldIdItemOffset == 0) { 13084c1762a62d7fc6638432c6c56e0422aa8cc6939Ben Gruver fieldIdItemOffset = dexFile.getFieldIdItemOffset(fieldIndex); 131d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver } 132d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver return fieldIdItemOffset; 133d1662b67fecaf835227aff3a136949a2358ccd4eBen Gruver } 134be799799ff8bbc5d86f8cfdc850947ab4f41695fBen Gruver} 135