diff options
Diffstat (limited to 'dexgen/src/com/android/dexgen/dex/file/EncodedMethod.java')
| -rw-r--r-- | dexgen/src/com/android/dexgen/dex/file/EncodedMethod.java | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/dexgen/src/com/android/dexgen/dex/file/EncodedMethod.java b/dexgen/src/com/android/dexgen/dex/file/EncodedMethod.java new file mode 100644 index 0000000..a35ca2c --- /dev/null +++ b/dexgen/src/com/android/dexgen/dex/file/EncodedMethod.java @@ -0,0 +1,196 @@ +/* + * 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.dexgen.dex.file; + +import com.android.dexgen.dex.code.DalvCode; +import com.android.dexgen.rop.code.AccessFlags; +import com.android.dexgen.rop.cst.CstMethodRef; +import com.android.dexgen.rop.cst.CstUtf8; +import com.android.dexgen.rop.type.TypeList; +import com.android.dexgen.util.AnnotatedOutput; +import com.android.dexgen.util.Hex; +import com.android.dexgen.util.Leb128Utils; + +import java.io.PrintWriter; + +/** + * Class that representats a method of a class. + */ +public final class EncodedMethod extends EncodedMember + implements Comparable<EncodedMethod> { + /** {@code non-null;} constant for the method */ + private final CstMethodRef method; + + /** + * {@code null-ok;} code for the method, if the method is neither + * {@code abstract} nor {@code native} + */ + private final CodeItem code; + + /** + * Constructs an instance. + * + * @param method {@code non-null;} constant for the method + * @param accessFlags access flags + * @param code {@code null-ok;} code for the method, if it is neither + * {@code abstract} nor {@code native} + * @param throwsList {@code non-null;} list of possibly-thrown exceptions, + * just used in generating debugging output (listings) + */ + public EncodedMethod(CstMethodRef method, int accessFlags, + DalvCode code, TypeList throwsList) { + super(accessFlags); + + if (method == null) { + throw new NullPointerException("method == null"); + } + + this.method = method; + + if (code == null) { + this.code = null; + } else { + boolean isStatic = (accessFlags & AccessFlags.ACC_STATIC) != 0; + this.code = new CodeItem(method, code, isStatic, throwsList); + } + } + + /** {@inheritDoc} */ + public boolean equals(Object other) { + if (! (other instanceof EncodedMethod)) { + return false; + } + + return compareTo((EncodedMethod) other) == 0; + } + + /** + * {@inheritDoc} + * + * <p><b>Note:</b> This compares the method constants only, + * ignoring any associated code, because it should never be the + * case that two different items with the same method constant + * ever appear in the same list (or same file, even).</p> + */ + public int compareTo(EncodedMethod other) { + return method.compareTo(other.method); + } + + /** {@inheritDoc} */ + @Override + public String toString() { + StringBuffer sb = new StringBuffer(100); + + sb.append(getClass().getName()); + sb.append('{'); + sb.append(Hex.u2(getAccessFlags())); + sb.append(' '); + sb.append(method); + + if (code != null) { + sb.append(' '); + sb.append(code); + } + + sb.append('}'); + + return sb.toString(); + } + + /** {@inheritDoc} */ + @Override + public void addContents(DexFile file) { + MethodIdsSection methodIds = file.getMethodIds(); + MixedItemSection wordData = file.getWordData(); + + methodIds.intern(method); + + if (code != null) { + wordData.add(code); + } + } + + /** {@inheritDoc} */ + public final String toHuman() { + return method.toHuman(); + } + + /** {@inheritDoc} */ + @Override + public final CstUtf8 getName() { + return method.getNat().getName(); + } + + /** {@inheritDoc} */ + @Override + public void debugPrint(PrintWriter out, boolean verbose) { + if (code == null) { + out.println(getRef().toHuman() + ": abstract or native"); + } else { + code.debugPrint(out, " ", verbose); + } + } + + /** + * Gets the constant for the method. + * + * @return {@code non-null;} the constant + */ + public final CstMethodRef getRef() { + return method; + } + + /** {@inheritDoc} */ + @Override + public int encode(DexFile file, AnnotatedOutput out, + int lastIndex, int dumpSeq) { + int methodIdx = file.getMethodIds().indexOf(method); + int diff = methodIdx - lastIndex; + int accessFlags = getAccessFlags(); + int codeOff = OffsettedItem.getAbsoluteOffsetOr0(code); + boolean hasCode = (codeOff != 0); + boolean shouldHaveCode = (accessFlags & + (AccessFlags.ACC_ABSTRACT | AccessFlags.ACC_NATIVE)) == 0; + + /* + * Verify that code appears if and only if a method is + * declared to have it. + */ + if (hasCode != shouldHaveCode) { + throw new UnsupportedOperationException( + "code vs. access_flags mismatch"); + } + + if (out.annotates()) { + out.annotate(0, String.format(" [%x] %s", dumpSeq, + method.toHuman())); + out.annotate(Leb128Utils.unsignedLeb128Size(diff), + " method_idx: " + Hex.u4(methodIdx)); + out.annotate(Leb128Utils.unsignedLeb128Size(accessFlags), + " access_flags: " + + AccessFlags.methodString(accessFlags)); + out.annotate(Leb128Utils.unsignedLeb128Size(codeOff), + " code_off: " + Hex.u4(codeOff)); + } + + out.writeUnsignedLeb128(diff); + out.writeUnsignedLeb128(accessFlags); + out.writeUnsignedLeb128(codeOff); + + return methodIdx; + } +} |