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Diffstat (limited to 'src/proguard/evaluation/value/InstructionOffsetValue.java')
| -rw-r--r-- | src/proguard/evaluation/value/InstructionOffsetValue.java | 320 |
1 files changed, 0 insertions, 320 deletions
diff --git a/src/proguard/evaluation/value/InstructionOffsetValue.java b/src/proguard/evaluation/value/InstructionOffsetValue.java deleted file mode 100644 index 7cb953e..0000000 --- a/src/proguard/evaluation/value/InstructionOffsetValue.java +++ /dev/null @@ -1,320 +0,0 @@ -/* - * ProGuard -- shrinking, optimization, obfuscation, and preverification - * of Java bytecode. - * - * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -package proguard.evaluation.value; - -import proguard.classfile.ClassConstants; - -/** - * This class represents a partially evaluated instruction offset. It can - * contain 0 or more specific instruction offsets. - * - * @author Eric Lafortune - */ -public class InstructionOffsetValue extends Category1Value -{ - public static final InstructionOffsetValue EMPTY_VALUE = new InstructionOffsetValue(); - - - private int[] values; - - - private InstructionOffsetValue() - { - } - - - public InstructionOffsetValue(int value) - { - this.values = new int[] { value }; - } - - - public InstructionOffsetValue(int[] values) - { - this.values = values; - } - - - public int instructionOffsetCount() - { - return values == null ? 0 : values.length; - } - - - public int instructionOffset(int index) - { - return values[index]; - } - - - /** - * Returns whether the given value is present in this list of instruction - * offsets. - */ - public boolean contains(int value) - { - if (values != null) - { - for (int index = 0; index < values.length; index++) - { - if (values[index] == value) - { - return true; - } - } - } - - return false; - } - - - /** - * Returns the minimum value from this list of instruction offsets. - * Returns <code>Integer.MAX_VALUE</code> if the list is empty. - */ - public int minimumValue() - { - int minimumValue = Integer.MAX_VALUE; - - if (values != null) - { - for (int index = 0; index < values.length; index++) - { - int value = values[index]; - - if (minimumValue > value) - { - minimumValue = value; - } - } - } - - return minimumValue; - } - - - /** - * Returns the maximum value from this list of instruction offsets. - * Returns <code>Integer.MIN_VALUE</code> if the list is empty. - */ - public int maximumValue() - { - int maximumValue = Integer.MIN_VALUE; - - if (values != null) - { - for (int index = 0; index < values.length; index++) - { - int value = values[index]; - - if (maximumValue < value) - { - maximumValue = value; - } - } - } - - return maximumValue; - } - - - /** - * Returns the generalization of this InstructionOffsetValue and the given - * other InstructionOffsetValue. The values of the other InstructionOffsetValue - * are guaranteed to remain at the end of the list, in the same order. - */ - public final Value generalize(InstructionOffsetValue other) - { - // If the values array of either is null, we can return the other one. - int[] thisValues = this.values; - if (thisValues == null) - { - return other; - } - - int[] otherValues = other.values; - if (otherValues == null) - { - return this; - } - - // Compute the length of the union of the arrays. - int newLength = thisValues.length; - for (int index = 0; index < otherValues.length; index++) - { - if (!this.contains(otherValues[index])) - { - newLength++; - } - } - - // If the length of the union array is equal to the length of the other - // values array, we can return it. - if (newLength == otherValues.length) - { - return other; - } - - // If the length of the union array is equal to the length of this - // values array, we can return it. We have to make sure that the other - // values are at the end. We'll just test one special case, with a - // single other value. - if (newLength == this.values.length && - otherValues.length == 1 && - thisValues[thisValues.length-1] == otherValues[0]) - { - return this; - } - - // Create the union array. - int newIndex = 0; - int[] newValues = new int[newLength]; - - // Is the length of the union array is equal to the sum of the lengths? - if (newLength == thisValues.length + otherValues.length) - { - // We can just copy all values, because they are unique. - System.arraycopy(thisValues, 0, newValues, 0, thisValues.length); - - newIndex = thisValues.length; - } - else - { - // Copy the values that are different from the other array. - for (int index = 0; index < thisValues.length; index++) - { - if (!other.contains(thisValues[index])) - { - newValues[newIndex++] = thisValues[index]; - } - } - } - - // Copy the values from the other array. - System.arraycopy(otherValues, 0, newValues, newIndex, otherValues.length); - - return new InstructionOffsetValue(newValues); - } - - - // Implementations for Value. - - public final InstructionOffsetValue instructionOffsetValue() - { - return this; - } - - public boolean isSpecific() - { - return true; - } - - public boolean isParticular() - { - return true; - } - - public final Value generalize(Value other) - { - return this.generalize(other.instructionOffsetValue()); - } - - public final int computationalType() - { - return TYPE_INSTRUCTION_OFFSET; - } - - public final String internalType() - { - return String.valueOf(ClassConstants.TYPE_INT); - } - - - // Implementations for Object. - - public boolean equals(Object object) - { - if (object == null || - this.getClass() != object.getClass()) - { - return false; - } - - InstructionOffsetValue other = (InstructionOffsetValue)object; - if (this.values == other.values) - { - return true; - } - - if (this.values == null || - other.values == null || - this.values.length != other.values.length) - { - return false; - } - - for (int index = 0; index < other.values.length; index++) - { - if (!this.contains(other.values[index])) - { - return false; - } - } - - return true; - } - - - public int hashCode() - { - int hashCode = this.getClass().hashCode(); - - if (values != null) - { - for (int index = 0; index < values.length; index++) - { - hashCode ^= values[index]; - } - } - - return hashCode; - } - - - public String toString() - { - StringBuffer buffer = new StringBuffer(); - - if (values != null) - { - for (int index = 0; index < values.length; index++) - { - if (index > 0) - { - buffer.append(','); - } - buffer.append(values[index]); - } - } - - return buffer.append(':').toString(); - } -} |