| java.lang.Object
 proguard.classfile.instruction.Instruction
All known Subclasses: proguard.classfile.instruction.BranchInstruction, proguard.classfile.instruction.SwitchInstruction, proguard.classfile.instruction.ConstantInstruction, proguard.classfile.instruction.VariableInstruction, proguard.classfile.instruction.SimpleInstruction,
| Instruction | | abstract public class Instruction (Code) | | Base class for representing instructions.
author:
Eric Lafortune |
| Field Summary | |
| public byte | opcode
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| Method Summary | |
| abstract public void | accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, InstructionVisitor instructionVisitor)
Accepts the given visitor. | | public byte | canonicalOpcode()
Returns the canonical opcode of this instruction, i.e. | | public String | getName()
Returns the name of the instruction. | | public boolean | isCategory2()
Returns whether the instruction is a Category 2 instruction. | | protected boolean | isWide()
Returns whether the instruction is wide, index.e. | | abstract public int | length(int offset)
Returns the length in bytes of the instruction. | | protected static int | readByte(byte[] code, int offset)
| | abstract protected void | readInfo(byte[] code, int offset)
Reads the data following the instruction opcode. | | protected static int | readInt(byte[] code, int offset)
| | protected static int | readShort(byte[] code, int offset)
| | protected static int | readSignedByte(byte[] code, int offset)
| | protected static int | readSignedShort(byte[] code, int offset)
| | protected static int | readSignedValue(byte[] code, int offset, int valueSize)
| | protected static int | readValue(byte[] code, int offset, int valueSize)
| | abstract public Instruction | shrink()
Shrinks this instruction to its shortest possible form. | | public int | stackPopCount(Clazz clazz)
Returns the number of entries popped from the stack during the execution
of the instruction. | | public int | stackPushCount(Clazz clazz)
Returns the number of entries pushed onto the stack during the execution
of the instruction. | | public String | toString(int offset)
Returns a description of the instruction, at the given offset. | | final public void | write(CodeAttribute codeAttribute, int offset)
Writes the Instruction at the given offset in the given code attribute. | | final public void | write(byte[] code, int offset)
Writes the Instruction at the given offset in the given code array. | | protected static void | writeByte(byte[] code, int offset, int value)
| | abstract protected void | writeInfo(byte[] code, int offset)
Writes data following the instruction opcode. | | protected static void | writeInt(byte[] code, int offset, int value)
| | protected static void | writeShort(byte[] code, int offset, int value)
| | protected static void | writeSignedByte(byte[] code, int offset, int value)
| | protected static void | writeSignedShort(byte[] code, int offset, int value)
| | protected static void | writeSignedValue(byte[] code, int offset, int value, int valueSize)
| | protected static void | writeValue(byte[] code, int offset, int value, int valueSize)
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| opcode | | public byte opcode(Code) | | |
| canonicalOpcode | | public byte canonicalOpcode()(Code) | | Returns the canonical opcode of this instruction, i.e. typically the
opcode whose extension has been removed.
|
| getName | | public String getName()(Code) | | Returns the name of the instruction.
|
| isCategory2 | | public boolean isCategory2()(Code) | | Returns whether the instruction is a Category 2 instruction. This means
that it operates on long or double arguments.
|
| isWide | | protected boolean isWide()(Code) | | Returns whether the instruction is wide, index.e. preceded by a wide opcode.
With the current specifications, only variable instructions can be wide.
|
| length | | abstract public int length(int offset)(Code) | | Returns the length in bytes of the instruction.
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| readByte | | protected static int readByte(byte[] code, int offset)(Code) | | |
| readInfo | | abstract protected void readInfo(byte[] code, int offset)(Code) | | Reads the data following the instruction opcode.
|
| readInt | | protected static int readInt(byte[] code, int offset)(Code) | | |
| readShort | | protected static int readShort(byte[] code, int offset)(Code) | | |
| readSignedByte | | protected static int readSignedByte(byte[] code, int offset)(Code) | | |
| readSignedShort | | protected static int readSignedShort(byte[] code, int offset)(Code) | | |
| readSignedValue | | protected static int readSignedValue(byte[] code, int offset, int valueSize)(Code) | | |
| readValue | | protected static int readValue(byte[] code, int offset, int valueSize)(Code) | | |
| shrink | | abstract public Instruction shrink()(Code) | | Shrinks this instruction to its shortest possible form.
this instruction. |
| stackPopCount | | public int stackPopCount(Clazz clazz)(Code) | | Returns the number of entries popped from the stack during the execution
of the instruction.
|
| stackPushCount | | public int stackPushCount(Clazz clazz)(Code) | | Returns the number of entries pushed onto the stack during the execution
of the instruction.
|
| toString | | public String toString(int offset)(Code) | | Returns a description of the instruction, at the given offset.
|
| write | | final public void write(CodeAttribute codeAttribute, int offset)(Code) | | Writes the Instruction at the given offset in the given code attribute.
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| write | | final public void write(byte[] code, int offset)(Code) | | Writes the Instruction at the given offset in the given code array.
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| writeByte | | protected static void writeByte(byte[] code, int offset, int value)(Code) | | |
| writeInfo | | abstract protected void writeInfo(byte[] code, int offset)(Code) | | Writes data following the instruction opcode.
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| writeInt | | protected static void writeInt(byte[] code, int offset, int value)(Code) | | |
| writeShort | | protected static void writeShort(byte[] code, int offset, int value)(Code) | | |
| writeSignedByte | | protected static void writeSignedByte(byte[] code, int offset, int value)(Code) | | |
| writeSignedShort | | protected static void writeSignedShort(byte[] code, int offset, int value)(Code) | | |
| writeSignedValue | | protected static void writeSignedValue(byte[] code, int offset, int value, int valueSize)(Code) | | |
| writeValue | | protected static void writeValue(byte[] code, int offset, int value, int valueSize)(Code) | | |
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