headerdump.java

已经移植好的java虚拟机

/*
 *	HeaderDump.java	1.10	99/06/22 SMI
 *
 * Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved.
 *
 * This software is the confidential and proprietary information of Sun
 * Microsystems, Inc. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with Sun.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
 * THIS SOFTWARE OR ITS DERIVATIVES.
 * Use is subject to license terms.
 */

package runtime;
import vm.Const;
import jcc.Util;
import util.*;
import components.*;
import vm.*;
import java.io.PrintStream;
import java.util.Enumeration;
import java.util.Vector;
import java.util.Hashtable;

abstract
public class HeaderDump{
    char		CDelim;
    final static char	DIR_DELIM = '/';
    final static char	INNER_DELIM = '$';

    public HeaderDump( char cdelim ){
	CDelim = cdelim;
    }

    public String filename( String classname ){
	return Util.convertToClassName( classname );
    }

    // this data is really per-header.
    // it is guarded by synchronous method access
    PrintStream	o;
    String      className;

    static String
    strsub( String src, char substitute ){
	return src.replace( DIR_DELIM, substitute).replace(INNER_DELIM, substitute );
    }

    protected boolean
    generateConsts( String classname, FieldInfo fields[] ){
	if ( fields == null ) return false;
	boolean didWork = false;
	for ( int i = 0; i < fields.length; i++ ){
	    FieldInfo f = fields[i];
	    if ( f.value == null ) continue; // not a constant.
	    String constName = classname+CDelim+f.name.string;
	    o.println("#undef "+constName );
	    ConstantObject v = f.value;
	    DoubleValueConstant dvc;
	    switch ( v.tag ){
	    case Const.CONSTANT_FLOAT:
		float fval = Float.intBitsToFloat( ((SingleValueConstant)v).value );
		o.println("#define "+constName+" "+fval+"f");
		break;
	    case Const.CONSTANT_DOUBLE:
		dvc = (DoubleValueConstant)v;
		double dval = Double.longBitsToDouble((((long)(dvc.highVal))<<32) | ((long)dvc.lowVal&0xffffffffL));
		o.println("#define "+constName+" "+dval+"D");
		break;
		
	    case Const.CONSTANT_LONG:
		dvc = (DoubleValueConstant)v;
		long lval = (((long)(dvc.highVal))<<32) | ((long)dvc.lowVal&0xffffffffL);
		o.println("#define "+constName+" "+lval+"LL");
		break;
	    case Const.CONSTANT_INTEGER:
		int ival = ((SingleValueConstant)v).value;
		o.println("#define "+constName+" "+ival+"L");
		break;
	    default:
	    }
	    didWork = true;
	}
	return didWork;
    }

    // returns true if anything worthwhile got written,
    // else false.
    abstract public boolean
    dumpHeader( ClassInfo c, PrintStream outfile );

    abstract public boolean
    dumpExternals( ClassInfo c, PrintStream outfile );
}