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git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@139 379699f6-c40d-0410-875b-85095c16579e
stable
jochen 26 years ago
parent b749fa95ff
commit cec18ee2e9
  1. 101
      jode/jode/bytecode/ConstantPool.java

@ -18,6 +18,7 @@
*/ */
package jode.bytecode; package jode.bytecode;
import java.io.*; import java.io.*;
import jode.Type;
/** /**
* This class represent the constant pool. * This class represent the constant pool.
@ -96,6 +97,12 @@ public class ConstantPool {
} }
} }
public int getTag(int i) throws ClassFormatException {
if (i == 0)
throw new ClassFormatException("null tag");
return tags[i];
}
public String getUTF8(int i) throws ClassFormatException { public String getUTF8(int i) throws ClassFormatException {
if (i == 0) if (i == 0)
return null; return null;
@ -104,6 +111,100 @@ public class ConstantPool {
return (String)constants[i]; return (String)constants[i];
} }
public String[] getRef(int i) throws ClassFormatException {
if (i == 0)
return null;
if (tags[i] != FIELDREF
&& tags[i] != METHODREF && tags[i] != INTERFACEMETHODREF)
throw new ClassFormatException("Tag mismatch");
int classIndex = indices1[i];
int nameTypeIndex = indices2[i];
if (tags[nameTypeIndex] != NAMEANDTYPE)
throw new ClassFormatException("Tag mismatch");
return new String[] {
getClassName(classIndex),
getUTF8(indices1[nameTypeIndex]), getUTF8(indices2[nameTypeIndex])
};
}
public Type getConstantType(int i) throws ClassFormatException
{
if (i == 0)
throw new ClassFormatException("null constant");
switch(tags[i]) {
case INTEGER: {
int value = ((Integer)constants[i]).intValue();
return ((value < Short.MIN_VALUE || value > Character.MAX_VALUE)
? Type.tInt
: (value < Byte.MIN_VALUE || value > Byte.MAX_VALUE)
? Type.tRange(Type.tInt, Type.tChar)
: Type.tUInt);
}
case FLOAT : return Type.tFloat ;
case LONG : return Type.tLong ;
case DOUBLE : return Type.tDouble;
case STRING : return Type.tString;
default:
throw new ClassFormatException
("invalid constant tag: " + tags[i]);
}
}
private static String quoted(String str) {
StringBuffer result = new StringBuffer("\"");
for (int i=0; i< str.length(); i++) {
char c;
switch (c = str.charAt(i)) {
case '\0':
result.append("\\0");
break;
case '\t':
result.append("\\t");
break;
case '\n':
result.append("\\n");
break;
case '\r':
result.append("\\r");
break;
case '\\':
result.append("\\\\");
break;
case '\"':
result.append("\\\"");
break;
default:
if (c < 32) {
String oct = Integer.toOctalString(c);
result.append("\\000".substring(0, 4-oct.length()))
.append(oct);
} else if (c >= 32 && c < 127)
result.append(str.charAt(i));
else {
String hex = Integer.toHexString(c);
result.append("\\u0000".substring(0, 6-hex.length()))
.append(hex);
}
}
}
return result.append("\"").toString();
}
public String getConstantString(int i) throws ClassFormatException {
if (i == 0)
throw new ClassFormatException("null constant");
switch (tags[i]) {
case ConstantPool.INTEGER:
case ConstantPool.FLOAT:
case ConstantPool.LONG:
case ConstantPool.DOUBLE:
return constants[i].toString();
case ConstantPool.STRING:
return quoted(getUTF8(indices1[i]));
}
throw new ClassFormatException("unknown constant tag");
}
public String getClassName(int i) throws ClassFormatException { public String getClassName(int i) throws ClassFormatException {
if (i == 0) if (i == 0)
return null; return null;

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