/*
* LinkerUtil.java 1.3 03/01/14 SMI
*
* Copyright © 2003 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package util;
/*
* Some things I find convenient for parsing strings and
* options containing signatures.
*/
public class LinkerUtil{
/*
* Read the named file.
* Tokenize the input.
* Returns an array of Strings which are the tokens.
* Propagates FileNotFound if the named file cannot be opened.
* In the input stream, the character '#' is understood
* to start a comment which continues to end-of-line.
*/
public static String[]
parseOptionFile( String fname ) throws java.io.IOException {
java.util.Vector v = new java.util.Vector();
java.io.StreamTokenizer in;
in = new java.io.StreamTokenizer(
new java.io.BufferedInputStream(
new java.io.FileInputStream( fname ) ) );
in.resetSyntax();
in.eolIsSignificant( false );
in.whitespaceChars( 0, 0x20 );
in.wordChars( '!', '~' );
in.commentChar('#');
while ( in.nextToken() != java.io.StreamTokenizer.TT_EOF ){
v.addElement( in.sval );
}
int n = v.size();
String olist[] = new String[ n ];
v.copyInto( olist );
return olist;
}
/*
* A few constants we frequently use.
*/
public final static String mainName = "main";
public final static String mainSig = "([Ljava/lang/String;)V";
public final static String constructorName = "<init>";
public final static String constructorSig = "()V";
public final static String staticInitializerName = "<clinit>";
public final static String staticInitializerSig = "()V";
/*
* Classes are often written with . as component separator.
* But in classfiles, as internally in our programs, we use /.
* So we often want to find all instances of . and change them
* into /.
*/
public static String
sanitizeClassname( String classname ){
return classname.replace('.', '/').intern();
}
/*
* When writing a fully-qualified method name,
* the type signature starts with (. Exploit this
* fact when looking for that signature.
*/
public static int
sigOff( String n ){
return n.indexOf( '(' );
}
/*
* When writing a fully-qualified method name,
* the name of the method is separated from the name
* of the containing class by a ., or sometimes by a /
* find the offset of that character.
*/
public static int
methodOff( String n ){
int moff = n.lastIndexOf( '.' );
if ( moff >= 0 ) return moff;
// curses. Must work harder.
// Cannot just say lastIndexOf('/'), as that
// may get us into the signature.
int ending = n.indexOf( '(' );
if ( ending < 0 ) ending = n.length();
moff = n.lastIndexOf( '/', ending );
return moff;
}
}
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