diff options
Diffstat (limited to 'tools/external/asm/org/objectweb/asm/tree/analysis/BasicValue.java')
| -rw-r--r-- | tools/external/asm/org/objectweb/asm/tree/analysis/BasicValue.java | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/tools/external/asm/org/objectweb/asm/tree/analysis/BasicValue.java b/tools/external/asm/org/objectweb/asm/tree/analysis/BasicValue.java new file mode 100644 index 000000000..19cdb33a9 --- /dev/null +++ b/tools/external/asm/org/objectweb/asm/tree/analysis/BasicValue.java @@ -0,0 +1,105 @@ +/*** + * ASM: a very small and fast Java bytecode manipulation framework + * Copyright (c) 2000-2005 INRIA, France Telecom + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ +package org.objectweb.asm.tree.analysis; + +import org.objectweb.asm.Type; + +/** + * A {@link Value} that is represented by its type in a seven types type sytem. + * This type system distinguishes the UNINITIALZED, INT, FLOAT, LONG, DOUBLE, + * REFERENCE and RETURNADDRESS types. + * + * @author Eric Bruneton + */ +public class BasicValue implements Value { + + public final static Value UNINITIALIZED_VALUE = new BasicValue(null); + + public final static Value INT_VALUE = new BasicValue(Type.INT_TYPE); + + public final static Value FLOAT_VALUE = new BasicValue(Type.FLOAT_TYPE); + + public final static Value LONG_VALUE = new BasicValue(Type.LONG_TYPE); + + public final static Value DOUBLE_VALUE = new BasicValue(Type.DOUBLE_TYPE); + + public final static Value REFERENCE_VALUE = new BasicValue(Type.getType("Ljava/lang/Object;")); + + public final static Value RETURNADDRESS_VALUE = new BasicValue(null); + + private Type type; + + public BasicValue(final Type type) { + this.type = type; + } + + public Type getType() { + return type; + } + + public int getSize() { + return type == Type.LONG_TYPE || type == Type.DOUBLE_TYPE ? 2 : 1; + } + + public boolean isReference() { + return type != null + && (type.getSort() == Type.OBJECT || type.getSort() == Type.ARRAY); + } + + public boolean equals(final Object value) { + if (value == this) { + return true; + } else if (value instanceof BasicValue) { + if (type == null) { + return ((BasicValue) value).type == null; + } else { + return type.equals(((BasicValue) value).type); + } + } else { + return false; + } + } + + public int hashCode() { + return type == null ? 0 : type.hashCode(); + } + + public String toString() { + if (this == UNINITIALIZED_VALUE) { + return "."; + } else if (this == RETURNADDRESS_VALUE) { + return "A"; + } else if (this == REFERENCE_VALUE) { + return "R"; + } else { + return type.getDescriptor(); + } + } +}
\ No newline at end of file |