Skeletal implementation of new characterset and screen methods.

Headers/Foundation/NSCharacterSet.h

@@ -98,6 +98,36 @@ extern "C" {
  * 0x000A and 0x000D and nextline 0x0085 character.
  */
 + (id) newlineCharacterSet;
+
+/**
+ * Returns allowed characers for URL fragment component.
+ */
++ (id) URLFragmentAllowedCharacterSet;
+
+/**
+ * Returns allowed characers for URL host component.
+ */
++ (id) URLFragmentAllowedCharacterSet;
+
+/**
+ * Returns allowed characers for URL password component.
+ */
++ (id) URLPasswordAllowedCharacterSet;
+
+/**
+ * Returns allowed characers for URL path component.
+ */
++ (id) URLPathAllowedCharacterSet;
+
+/**
+ * Returns allowed characers for URL query component.
+ */
++ (id) URLQueryAllowedCharacterSet;
+
+/**
+ * Returns allowed characers for URL USER component.
+ */
++ (id) URLUserAllowedCharacterSet;
 #endif
 
 /**

Headers/Foundation/NSString.h

@@ -800,6 +800,8 @@ typedef NSUInteger NSStringEncodingConversionOptions;
 - (NSString*) stringByReplacingPercentEscapesUsingEncoding: (NSStringEncoding)e;
 - (NSString*) stringByTrimmingCharactersInSet: (NSCharacterSet*)aSet;
 - (const char *)UTF8String;
+- (NSString *) stringByAddingPercentWithAllowedCharacters: (NSCharacterSet *)aSet;
+- (NSString *) stringByRemovingEscapeEncoding;
 #endif
 
 #if OS_API_VERSION(MAC_OS_X_VERSION_10_3,GS_API_LATEST) 

Source/NSCharacterSet.m

@@ -833,6 +833,31 @@ static Class concreteMutableClass = nil;
     return nil;
 }
 
++ (id) URLFragmentAllowedCharacterSet;
+{
+  return nil;
+}
+
++ (id) URLPasswordAllowedCharacterSet;
+{
+  return nil;
+}
+
++ (id) URLPathAllowedCharacterSet;
+{
+  return nil;
+}
+
++ (id) URLQueryAllowedCharacterSet;
+{
+  return nil;
+}
+
++ (id) URLUserAllowedCharacterSet
+{
+  return nil;
+}
+
 - (NSData*) bitmapRepresentation
 {
   BOOL		(*imp)(id, SEL, unichar);

Source/NSString.m

@@ -1949,6 +1949,16 @@ GSICUCollatorOpen(NSStringCompareOptions mask, NSLocale *locale)
   return s;
 }
 
+- (NSString *) stringByAddingPercentWithAllowedCharacters: (NSCharacterSet *)aSet
+{
+  return nil;
+}
+
+- (NSString *) stringByRemovingEscapeEncoding
+{
+  return nil;
+}
+
 /**
  * Constructs a new string consisting of this instance followed by the string
  * specified by format.