[Wonder-cvs] CVS: Wonder/Common/Frameworks/ERExtensions/Sources/er/extensions ERXStringUtilities.java, 1.74, 1.75

[Mike S. <ms...@us...>]

Update of /cvsroot/wonder/Wonder/Common/Frameworks/ERExtensions/Sources/er/extensions
In directory sc8-pr-cvs9.sourceforge.net:/tmp/cvs-serv6595/Sources/er/extensions

Modified Files:
	ERXStringUtilities.java 
Log Message:
this is retarded that this method isn't on StringBuffer already.

Index: ERXStringUtilities.java
===================================================================
RCS file: /cvsroot/wonder/Wonder/Common/Frameworks/ERExtensions/Sources/er/extensions/ERXStringUtilities.java,v
retrieving revision 1.74
retrieving revision 1.75
diff -C2 -d -r1.74 -r1.75
*** ERXStringUtilities.java	24 Jan 2008 05:11:35 -0000	1.74
--- ERXStringUtilities.java	31 Jan 2008 16:28:24 -0000	1.75
***************
*** 1650,1652 ****
--- 1650,1684 ----
  		return "{\n" + result + "}\n";
  	}
+ 	
+ 	/**
+ 	 * It's ridiculous that StringBuffer doesn't have a .regionMatches like String.  This is
+ 	 * stolen from String and reimplemnted on top of StringBuffer.  It's slightly slower than
+ 	 * String's because we have to call charAt instead of just accessing the underlying array,
+ 	 * but so be it.
+ 	 * 
+ 	 * @param str the StringBuffer to compare a region of
+      * @param toffset the starting offset of the subregion in this string.
+      * @param other the string argument.
+      * @param ooffset the starting offset of the subregion in the string argument.
+      * @param len the number of characters to compare.
+      * @return <code>true</code> if the specified subregion of this string
+      *         exactly matches the specified subregion of the string argument;
+      *         <code>false</code> otherwise.
+ 	 */
+     public static boolean regionMatches(StringBuffer str, int toffset, String other, int ooffset, int len) {
+ 		int to = toffset;
+ 		int po = ooffset;
+ 		// Note: toffset, ooffset, or len might be near -1>>>1.
+ 		int count = str.length();
+ 		int otherCount = other.length();
+ 		if ((ooffset < 0) || (toffset < 0) || (toffset > (long)count - len) || (ooffset > (long)otherCount - len)) {
+ 		   return false;
+ 		}
+ 		while (len-- > 0) {
+ 		   if (str.charAt(to++) != other.charAt(po++)) {
+ 		       return false;
+ 		   }
+ 		}
+ 		return true;
+     }
  }