org.stringtemplate.v4.compiler.BytecodeDisassembler Maven / Gradle / Ivy
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StringTemplate is a java template engine for generating source code,
web pages, emails, or any other formatted text output.
StringTemplate is particularly good at multi-targeted code generators,
multiple site skins, and internationalization/localization.
It evolved over years of effort developing jGuru.com.
StringTemplate also powers the ANTLR 3 and 4 code generator. Its distinguishing characteristic
is that unlike other engines, it strictly enforces model-view separation.
Strict separation makes websites and code generators more flexible
and maintainable; it also provides an excellent defense against malicious
template authors.
/*
* [The "BSD license"]
* Copyright (c) 2011 Terence Parr
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.stringtemplate.v4.compiler;
import org.stringtemplate.v4.misc.Interval;
import org.stringtemplate.v4.misc.Misc;
import java.util.ArrayList;
import java.util.List;
public class BytecodeDisassembler {
CompiledST code;
public BytecodeDisassembler(CompiledST code) { this.code = code; }
public String instrs() {
StringBuilder buf = new StringBuilder();
int ip=0;
while (ip0 ) buf.append(", ");
int opcode = code.instrs[ip];
Bytecode.Instruction I = Bytecode.instructions[opcode];
buf.append(I.name);
ip++;
for (int opnd=0; opnd=code.codeSize ) {
throw new IllegalArgumentException("ip out of range: "+ip);
}
Bytecode.Instruction I =
Bytecode.instructions[opcode];
if ( I==null ) {
throw new IllegalArgumentException("no such instruction "+opcode+
" at address "+ip);
}
String instrName = I.name;
buf.append( String.format("%04d:\t%-14s", ip, instrName) );
ip++;
if ( I.nopnds ==0 ) {
buf.append(" ");
return ip;
}
List operands = new ArrayList();
for (int i=0; i0 ) buf.append(", ");
buf.append( s );
}
return ip;
}
private String showConstPoolOperand(int poolIndex) {
StringBuffer buf = new StringBuffer();
buf.append("#");
buf.append(poolIndex);
String s = "";
if ( poolIndex