616 lines
19 KiB
Java
616 lines
19 KiB
Java
/*
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* Copyright 2000-2014 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jetbrains.java.decompiler.modules.decompiler.exps;
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import org.jetbrains.java.decompiler.code.CodeConstants;
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import org.jetbrains.java.decompiler.modules.decompiler.ExprProcessor;
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import org.jetbrains.java.decompiler.modules.decompiler.vars.CheckTypesResult;
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import org.jetbrains.java.decompiler.struct.gen.VarType;
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import org.jetbrains.java.decompiler.util.InterpreterUtil;
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import org.jetbrains.java.decompiler.util.ListStack;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.List;
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public class FunctionExprent extends Exprent {
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public static final int FUNCTION_ADD = 0;
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public static final int FUNCTION_SUB = 1;
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public static final int FUNCTION_MUL = 2;
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public static final int FUNCTION_DIV = 3;
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public static final int FUNCTION_AND = 4;
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public static final int FUNCTION_OR = 5;
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public static final int FUNCTION_XOR = 6;
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public static final int FUNCTION_REM = 7;
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public static final int FUNCTION_SHL = 8;
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public static final int FUNCTION_SHR = 9;
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public static final int FUNCTION_USHR = 10;
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public static final int FUNCTION_BITNOT = 11;
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public static final int FUNCTION_BOOLNOT = 12;
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public static final int FUNCTION_NEG = 13;
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public final static int FUNCTION_I2L = 14;
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public final static int FUNCTION_I2F = 15;
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public final static int FUNCTION_I2D = 16;
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public final static int FUNCTION_L2I = 17;
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public final static int FUNCTION_L2F = 18;
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public final static int FUNCTION_L2D = 19;
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public final static int FUNCTION_F2I = 20;
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public final static int FUNCTION_F2L = 21;
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public final static int FUNCTION_F2D = 22;
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public final static int FUNCTION_D2I = 23;
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public final static int FUNCTION_D2L = 24;
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public final static int FUNCTION_D2F = 25;
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public final static int FUNCTION_I2B = 26;
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public final static int FUNCTION_I2C = 27;
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public final static int FUNCTION_I2S = 28;
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public final static int FUNCTION_CAST = 29;
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public final static int FUNCTION_INSTANCEOF = 30;
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public final static int FUNCTION_ARRAYLENGTH = 31;
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public final static int FUNCTION_IMM = 32;
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public final static int FUNCTION_MMI = 33;
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public final static int FUNCTION_IPP = 34;
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public final static int FUNCTION_PPI = 35;
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public final static int FUNCTION_IIF = 36;
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public final static int FUNCTION_LCMP = 37;
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public final static int FUNCTION_FCMPL = 38;
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public final static int FUNCTION_FCMPG = 39;
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public final static int FUNCTION_DCMPL = 40;
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public final static int FUNCTION_DCMPG = 41;
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public static final int FUNCTION_EQ = 42;
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public static final int FUNCTION_NE = 43;
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public static final int FUNCTION_LT = 44;
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public static final int FUNCTION_GE = 45;
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public static final int FUNCTION_GT = 46;
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public static final int FUNCTION_LE = 47;
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public static final int FUNCTION_CADD = 48;
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public static final int FUNCTION_COR = 49;
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public static final int FUNCTION_STRCONCAT = 50;
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private static final VarType[] types = new VarType[]{
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VarType.VARTYPE_LONG,
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VarType.VARTYPE_FLOAT,
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VarType.VARTYPE_DOUBLE,
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VarType.VARTYPE_INT,
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VarType.VARTYPE_FLOAT,
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VarType.VARTYPE_DOUBLE,
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VarType.VARTYPE_INT,
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VarType.VARTYPE_LONG,
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VarType.VARTYPE_DOUBLE,
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VarType.VARTYPE_INT,
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VarType.VARTYPE_LONG,
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VarType.VARTYPE_FLOAT,
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VarType.VARTYPE_BYTE,
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VarType.VARTYPE_CHAR,
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VarType.VARTYPE_SHORT
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};
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private static final String[] operators = new String[]{
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" + ",
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" - ",
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" * ",
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" / ",
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" & ",
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" | ",
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" ^ ",
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" % ",
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" << ",
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" >> ",
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" >>> ",
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" == ",
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" != ",
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" < ",
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" >= ",
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" > ",
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" <= ",
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" && ",
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" || ",
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" + "
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};
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private static final int[] precedence = new int[]{
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3, // FUNCTION_ADD
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3, // FUNCTION_SUB
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2, // FUNCTION_MUL
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2, // FUNCTION_DIV
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7, // FUNCTION_AND
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9, // FUNCTION_OR
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8, // FUNCTION_XOR
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2, // FUNCTION_REM
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4, // FUNCTION_SHL
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4, // FUNCTION_SHR
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4, // FUNCTION_USHR
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1, // FUNCTION_BITNOT
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1, // FUNCTION_BOOLNOT
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1, // FUNCTION_NEG
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1, // FUNCTION_I2L
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1, // FUNCTION_I2F
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1, // FUNCTION_I2D
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1, // FUNCTION_L2I
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1, // FUNCTION_L2F
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1, // FUNCTION_L2D
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1, // FUNCTION_F2I
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1, // FUNCTION_F2L
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1, // FUNCTION_F2D
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1, // FUNCTION_D2I
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1, // FUNCTION_D2L
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1, // FUNCTION_D2F
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1, // FUNCTION_I2B
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1, // FUNCTION_I2C
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1, // FUNCTION_I2S
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1, // FUNCTION_CAST
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6, // FUNCTION_INSTANCEOF
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0, // FUNCTION_ARRAYLENGTH
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1, // FUNCTION_IMM
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1, // FUNCTION_MMI
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1, // FUNCTION_IPP
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1, // FUNCTION_PPI
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12, // FUNCTION_IFF
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-1, // FUNCTION_LCMP
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-1, // FUNCTION_FCMPL
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-1, // FUNCTION_FCMPG
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-1, // FUNCTION_DCMPL
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-1, // FUNCTION_DCMPG
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6, // FUNCTION_EQ = 41;
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6, // FUNCTION_NE = 42;
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5, // FUNCTION_LT = 43;
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5, // FUNCTION_GE = 44;
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5, // FUNCTION_GT = 45;
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5, // FUNCTION_LE = 46;
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10, // FUNCTION_CADD = 47;
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11, // FUNCTION_COR = 48;
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3 // FUNCTION_STRCONCAT = 49;
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};
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private static final HashSet<Integer> associativity =
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new HashSet<Integer>(Arrays.asList(new Integer[]{FUNCTION_ADD, FUNCTION_MUL, FUNCTION_AND,
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FUNCTION_OR, FUNCTION_XOR, FUNCTION_CADD, FUNCTION_COR, FUNCTION_STRCONCAT}));
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private int functype;
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private VarType implicitType;
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private List<Exprent> lstOperands = new ArrayList<Exprent>();
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{
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this.type = EXPRENT_FUNCTION;
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}
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public FunctionExprent(int functype, ListStack<Exprent> stack) {
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this.functype = functype;
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if (functype >= FUNCTION_BITNOT && functype <= FUNCTION_PPI && functype != FUNCTION_CAST
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&& functype != FUNCTION_INSTANCEOF) {
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lstOperands.add(stack.pop());
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}
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else if (functype == FUNCTION_IIF) {
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throw new RuntimeException("no direct instantiation possible");
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}
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else {
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Exprent expr = stack.pop();
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lstOperands.add(stack.pop());
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lstOperands.add(expr);
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}
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}
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public FunctionExprent(int functype, List<Exprent> operands) {
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this.functype = functype;
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this.lstOperands = operands;
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}
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public VarType getExprType() {
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VarType exprType = null;
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if (functype <= FUNCTION_NEG || functype == FUNCTION_IPP || functype == FUNCTION_PPI
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|| functype == FUNCTION_IMM || functype == FUNCTION_MMI) {
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VarType type1 = lstOperands.get(0).getExprType();
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VarType type2 = null;
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if (lstOperands.size() > 1) {
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type2 = lstOperands.get(1).getExprType();
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}
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switch (functype) {
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case FUNCTION_IMM:
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case FUNCTION_MMI:
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case FUNCTION_IPP:
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case FUNCTION_PPI:
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exprType = implicitType;
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break;
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case FUNCTION_BOOLNOT:
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exprType = VarType.VARTYPE_BOOLEAN;
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break;
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case FUNCTION_SHL:
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case FUNCTION_SHR:
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case FUNCTION_USHR:
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case FUNCTION_BITNOT:
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case FUNCTION_NEG:
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exprType = getMaxVarType(new VarType[]{type1});
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break;
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case FUNCTION_ADD:
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case FUNCTION_SUB:
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case FUNCTION_MUL:
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case FUNCTION_DIV:
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case FUNCTION_REM:
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exprType = getMaxVarType(new VarType[]{type1, type2});
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break;
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case FUNCTION_AND:
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case FUNCTION_OR:
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case FUNCTION_XOR:
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if (type1.type == CodeConstants.TYPE_BOOLEAN & type2.type == CodeConstants.TYPE_BOOLEAN) {
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exprType = VarType.VARTYPE_BOOLEAN;
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}
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else {
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exprType = getMaxVarType(new VarType[]{type1, type2});
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}
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}
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}
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else if (functype == FUNCTION_CAST) {
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exprType = lstOperands.get(1).getExprType();
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}
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else if (functype == FUNCTION_IIF) {
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Exprent param1 = lstOperands.get(1);
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Exprent param2 = lstOperands.get(2);
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VarType supertype = VarType.getCommonSupertype(param1.getExprType(), param2.getExprType());
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if (param1.type == Exprent.EXPRENT_CONST && param2.type == Exprent.EXPRENT_CONST &&
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supertype.type != CodeConstants.TYPE_BOOLEAN && VarType.VARTYPE_INT.isSuperset(supertype)) {
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exprType = VarType.VARTYPE_INT;
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}
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else {
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exprType = supertype;
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}
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}
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else if (functype == FUNCTION_STRCONCAT) {
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exprType = VarType.VARTYPE_STRING;
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}
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else if (functype >= FUNCTION_EQ || functype == FUNCTION_INSTANCEOF) {
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exprType = VarType.VARTYPE_BOOLEAN;
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}
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else if (functype >= FUNCTION_ARRAYLENGTH) {
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exprType = VarType.VARTYPE_INT;
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}
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else {
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exprType = types[functype - FUNCTION_I2L];
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}
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return exprType;
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}
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public int getExprentUse() {
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if (functype >= FUNCTION_IMM && functype <= FUNCTION_PPI) {
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return 0;
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}
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else {
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int ret = Exprent.MULTIPLE_USES | Exprent.SIDE_EFFECTS_FREE;
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for (Exprent expr : lstOperands) {
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ret &= expr.getExprentUse();
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}
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return ret;
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}
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}
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public CheckTypesResult checkExprTypeBounds() {
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CheckTypesResult result = new CheckTypesResult();
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Exprent param1 = lstOperands.get(0);
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VarType type1 = param1.getExprType();
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Exprent param2 = null;
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VarType type2 = null;
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if (lstOperands.size() > 1) {
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param2 = lstOperands.get(1);
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type2 = param2.getExprType();
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}
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switch (functype) {
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case FUNCTION_IIF:
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VarType supertype = getExprType();
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if (supertype == null) {
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supertype = getExprType();
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}
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result.addMinTypeExprent(param1, VarType.VARTYPE_BOOLEAN);
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result.addMinTypeExprent(param2, VarType.getMinTypeInFamily(supertype.type_family));
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result.addMinTypeExprent(lstOperands.get(2), VarType.getMinTypeInFamily(supertype.type_family));
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break;
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case FUNCTION_I2L:
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case FUNCTION_I2F:
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case FUNCTION_I2D:
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case FUNCTION_I2B:
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case FUNCTION_I2C:
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case FUNCTION_I2S:
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result.addMinTypeExprent(param1, VarType.VARTYPE_BYTECHAR);
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result.addMaxTypeExprent(param1, VarType.VARTYPE_INT);
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break;
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case FUNCTION_IMM:
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case FUNCTION_IPP:
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case FUNCTION_MMI:
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case FUNCTION_PPI:
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result.addMinTypeExprent(param1, implicitType);
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result.addMaxTypeExprent(param1, implicitType);
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break;
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case FUNCTION_ADD:
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case FUNCTION_SUB:
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case FUNCTION_MUL:
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case FUNCTION_DIV:
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case FUNCTION_REM:
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case FUNCTION_SHL:
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case FUNCTION_SHR:
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case FUNCTION_USHR:
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case FUNCTION_LT:
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case FUNCTION_GE:
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case FUNCTION_GT:
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case FUNCTION_LE:
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result.addMinTypeExprent(param2, VarType.VARTYPE_BYTECHAR);
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case FUNCTION_BITNOT:
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// case FUNCTION_BOOLNOT:
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case FUNCTION_NEG:
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result.addMinTypeExprent(param1, VarType.VARTYPE_BYTECHAR);
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break;
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case FUNCTION_AND:
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case FUNCTION_OR:
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case FUNCTION_XOR:
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case FUNCTION_EQ:
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case FUNCTION_NE: {
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if (type1.type == CodeConstants.TYPE_BOOLEAN) {
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if (type2.isStrictSuperset(type1)) {
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result.addMinTypeExprent(param1, VarType.VARTYPE_BYTECHAR);
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}
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else { // both are booleans
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boolean param1_false_boolean =
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type1.isFalseBoolean() || (param1.type == Exprent.EXPRENT_CONST && !((ConstExprent)param1).hasBooleanValue());
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boolean param2_false_boolean =
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type1.isFalseBoolean() || (param2.type == Exprent.EXPRENT_CONST && !((ConstExprent)param2).hasBooleanValue());
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if (param1_false_boolean || param2_false_boolean) {
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result.addMinTypeExprent(param1, VarType.VARTYPE_BYTECHAR);
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result.addMinTypeExprent(param2, VarType.VARTYPE_BYTECHAR);
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}
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}
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}
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else if (type2.type == CodeConstants.TYPE_BOOLEAN) {
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if (type1.isStrictSuperset(type2)) {
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result.addMinTypeExprent(param2, VarType.VARTYPE_BYTECHAR);
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}
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}
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}
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}
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return result;
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}
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public List<Exprent> getAllExprents() {
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List<Exprent> lst = new ArrayList<Exprent>();
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lst.addAll(lstOperands);
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return lst;
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}
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public Exprent copy() {
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List<Exprent> lst = new ArrayList<Exprent>();
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for (Exprent expr : lstOperands) {
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lst.add(expr.copy());
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}
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FunctionExprent func = new FunctionExprent(functype, lst);
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func.setImplicitType(implicitType);
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return func;
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}
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public boolean equals(Object o) {
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if (o == this) return true;
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if (o == null || !(o instanceof FunctionExprent)) return false;
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FunctionExprent fe = (FunctionExprent)o;
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return functype == fe.getFunctype() &&
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InterpreterUtil.equalLists(lstOperands, fe.getLstOperands()); // TODO: order of operands insignificant
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}
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public void replaceExprent(Exprent oldexpr, Exprent newexpr) {
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for (int i = 0; i < lstOperands.size(); i++) {
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if (oldexpr == lstOperands.get(i)) {
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lstOperands.set(i, newexpr);
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}
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}
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}
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public String toJava(int indent) {
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if (functype <= FUNCTION_USHR) {
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return wrapOperandString(lstOperands.get(0), false, indent) + operators[functype] +
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wrapOperandString(lstOperands.get(1), true, indent);
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}
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if (functype >= FUNCTION_EQ) {
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return wrapOperandString(lstOperands.get(0), false, indent) + operators[functype - FUNCTION_EQ + 11] +
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wrapOperandString(lstOperands.get(1), true, indent);
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}
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switch (functype) {
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case FUNCTION_BITNOT:
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return "~" + wrapOperandString(lstOperands.get(0), true, indent);
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case FUNCTION_BOOLNOT:
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return "!" + wrapOperandString(lstOperands.get(0), true, indent);
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case FUNCTION_NEG:
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return "-" + wrapOperandString(lstOperands.get(0), true, indent);
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case FUNCTION_CAST:
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return "(" + lstOperands.get(1).toJava(indent) + ")" + wrapOperandString(lstOperands.get(0), true, indent);
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case FUNCTION_ARRAYLENGTH:
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Exprent arr = lstOperands.get(0);
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String res = wrapOperandString(arr, false, indent);
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if (arr.getExprType().arraydim == 0) {
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VarType objarr = VarType.VARTYPE_OBJECT.copy();
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objarr.arraydim = 1; // type family does not change
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res = "((" + ExprProcessor.getCastTypeName(objarr) + ")" + res + ")";
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}
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return res + ".length";
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case FUNCTION_IIF:
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return wrapOperandString(lstOperands.get(0), true, indent) + "?" + wrapOperandString(lstOperands.get(1), true, indent) + ":" +
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wrapOperandString(lstOperands.get(2), true, indent);
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case FUNCTION_IPP:
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return wrapOperandString(lstOperands.get(0), true, indent) + "++";
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case FUNCTION_PPI:
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return "++" + wrapOperandString(lstOperands.get(0), true, indent);
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case FUNCTION_IMM:
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return wrapOperandString(lstOperands.get(0), true, indent) + "--";
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case FUNCTION_MMI:
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return "--" + wrapOperandString(lstOperands.get(0), true, indent);
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case FUNCTION_INSTANCEOF:
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return wrapOperandString(lstOperands.get(0), true, indent) + " instanceof " + wrapOperandString(lstOperands.get(1), true, indent);
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case FUNCTION_LCMP: // shouldn't appear in the final code
|
|
return "__lcmp__(" +
|
|
wrapOperandString(lstOperands.get(0), true, indent) +
|
|
"," +
|
|
wrapOperandString(lstOperands.get(1), true, indent) +
|
|
")";
|
|
case FUNCTION_FCMPL: // shouldn't appear in the final code
|
|
return "__fcmpl__(" +
|
|
wrapOperandString(lstOperands.get(0), true, indent) +
|
|
"," +
|
|
wrapOperandString(lstOperands.get(1), true, indent) +
|
|
")";
|
|
case FUNCTION_FCMPG: // shouldn't appear in the final code
|
|
return "__fcmpg__(" +
|
|
wrapOperandString(lstOperands.get(0), true, indent) +
|
|
"," +
|
|
wrapOperandString(lstOperands.get(1), true, indent) +
|
|
")";
|
|
case FUNCTION_DCMPL: // shouldn't appear in the final code
|
|
return "__dcmpl__(" +
|
|
wrapOperandString(lstOperands.get(0), true, indent) +
|
|
"," +
|
|
wrapOperandString(lstOperands.get(1), true, indent) +
|
|
")";
|
|
case FUNCTION_DCMPG: // shouldn't appear in the final code
|
|
return "__dcmpg__(" +
|
|
wrapOperandString(lstOperands.get(0), true, indent) +
|
|
"," +
|
|
wrapOperandString(lstOperands.get(1), true, indent) +
|
|
")";
|
|
}
|
|
|
|
if (functype <= FUNCTION_I2S) {
|
|
return "(" + ExprProcessor.getTypeName(types[functype - FUNCTION_I2L]) + ")" + wrapOperandString(lstOperands.get(0), true, indent);
|
|
}
|
|
|
|
// return "<unknown function>";
|
|
throw new RuntimeException("invalid function");
|
|
}
|
|
|
|
public int getPrecedence() {
|
|
return getPrecedence(functype);
|
|
}
|
|
|
|
public static int getPrecedence(int func) {
|
|
return precedence[func];
|
|
}
|
|
|
|
public VarType getSimpleCastType() {
|
|
return types[functype - FUNCTION_I2L];
|
|
}
|
|
|
|
private String wrapOperandString(Exprent expr, boolean eq, int indent) {
|
|
|
|
int myprec = getPrecedence();
|
|
int exprprec = expr.getPrecedence();
|
|
|
|
boolean parentheses = exprprec > myprec;
|
|
if (!parentheses && eq) {
|
|
parentheses = (exprprec == myprec);
|
|
if (parentheses) {
|
|
if (expr.type == Exprent.EXPRENT_FUNCTION &&
|
|
((FunctionExprent)expr).getFunctype() == functype) {
|
|
parentheses = !associativity.contains(functype);
|
|
}
|
|
}
|
|
}
|
|
|
|
String res = expr.toJava(indent);
|
|
|
|
if (parentheses) {
|
|
res = "(" + res + ")";
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
private static VarType getMaxVarType(VarType[] arr) {
|
|
|
|
int[] types = new int[]{CodeConstants.TYPE_DOUBLE, CodeConstants.TYPE_FLOAT, CodeConstants.TYPE_LONG};
|
|
VarType[] vartypes = new VarType[]{VarType.VARTYPE_DOUBLE, VarType.VARTYPE_FLOAT, VarType.VARTYPE_LONG};
|
|
|
|
for (int i = 0; i < types.length; i++) {
|
|
for (int j = 0; j < arr.length; j++) {
|
|
if (arr[j].type == types[i]) {
|
|
return vartypes[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
return VarType.VARTYPE_INT;
|
|
}
|
|
|
|
// *****************************************************************************
|
|
// getter and setter methods
|
|
// *****************************************************************************
|
|
|
|
public int getFunctype() {
|
|
return functype;
|
|
}
|
|
|
|
public void setFunctype(int functype) {
|
|
this.functype = functype;
|
|
}
|
|
|
|
public List<Exprent> getLstOperands() {
|
|
return lstOperands;
|
|
}
|
|
|
|
public void setLstOperands(List<Exprent> lstOperands) {
|
|
this.lstOperands = lstOperands;
|
|
}
|
|
|
|
public VarType getImplicitType() {
|
|
return implicitType;
|
|
}
|
|
|
|
public void setImplicitType(VarType implicitType) {
|
|
this.implicitType = implicitType;
|
|
}
|
|
}
|
|
|