Add the 3.3.3 sources for class-dump.

class-dump/src/NSScanner-Extensions.m

+// -*- mode: ObjC -*-
+
+//  This file is part of class-dump, a utility for examining the Objective-C segment of Mach-O files.
+//  Copyright (C) 1997-1998, 2000-2001, 2004-2010 Steve Nygard.
+
+#import "NSScanner-Extensions.h"
+
+#import "NSString-Extensions.h"
+
+@implementation NSScanner (CDExtensions)
+
+// other: $_:*
+// start: alpha + other
+// remainder: alnum + other
+
++ (NSCharacterSet *)cdOtherCharacterSet;
+{
+    static NSCharacterSet *otherCharacterSet = nil;
+
+    if (otherCharacterSet == nil)
+        otherCharacterSet = [[NSCharacterSet characterSetWithCharactersInString:@"$_:*"] retain];
+
+    return otherCharacterSet;
+}
+
++ (NSCharacterSet *)cdIdentifierStartCharacterSet;
+{
+    static NSCharacterSet *identifierStartCharacterSet = nil;
+
+    if (identifierStartCharacterSet == nil) {
+        NSMutableCharacterSet *aSet;
+
+        aSet = [[NSCharacterSet letterCharacterSet] mutableCopy];
+        [aSet formUnionWithCharacterSet:[NSScanner cdOtherCharacterSet]];
+        identifierStartCharacterSet = [aSet copy];
+
+        [aSet release];
+    }
+
+    return identifierStartCharacterSet;
+}
+
++ (NSCharacterSet *)cdIdentifierCharacterSet;
+{
+    static NSCharacterSet *identifierCharacterSet = nil;
+
+    if (identifierCharacterSet == nil) {
+        NSMutableCharacterSet *aSet;
+
+        aSet = [[NSCharacterSet alphanumericCharacterSet] mutableCopy];
+        [aSet formUnionWithCharacterSet:[NSScanner cdOtherCharacterSet]];
+        identifierCharacterSet = [aSet copy];
+
+        [aSet release];
+    }
+
+    return identifierCharacterSet;
+}
+
++ (NSCharacterSet *)cdTemplateTypeCharacterSet;
+{
+    static NSCharacterSet *templateTypeCharacterSet = nil;
+
+    if (templateTypeCharacterSet == nil)
+        templateTypeCharacterSet = [[[NSCharacterSet characterSetWithCharactersInString:@"<,>"] invertedSet] retain];
+
+    return templateTypeCharacterSet;
+}
+
+- (NSString *)peekCharacter;
+{
+    //[self skipCharacters];
+
+    if ([self isAtEnd])
+        return nil;
+
+    return [[self string] substringWithRange:NSMakeRange([self scanLocation], 1)];
+}
+
+- (unichar)peekChar;
+{
+    return [[self string] characterAtIndex:[self scanLocation]];
+}
+
+- (BOOL)scanCharacter:(unichar *)value;
+{
+    unichar ch;
+
+    //[self skipCharacters];
+
+    if ([self isAtEnd])
+        return NO;
+
+    ch = [[self string] characterAtIndex:[self scanLocation]];
+    if (value != NULL)
+        *value = ch;
+
+    [self setScanLocation:[self scanLocation] + 1];
+
+    return YES;
+}
+
+- (BOOL)scanCharacterFromSet:(NSCharacterSet *)set intoString:(NSString **)value;
+{
+    unichar ch;
+
+    //[self skipCharacters];
+
+    if ([self isAtEnd])
+        return NO;
+
+    ch = [[self string] characterAtIndex:[self scanLocation]];
+    if ([set characterIsMember:ch]) {
+        if (value != NULL) {
+            *value = [NSString stringWithUnichar:ch];
+        }
+
+        [self setScanLocation:[self scanLocation] + 1];
+        return YES;
+    }
+
+    return NO;
+}
+
+// On 10.3 (7D24) the Foundation scanCharactersFromSet:intoString: inverts the set each call, creating an autoreleased CFCharacterSet.
+// This cuts the total CFCharacterSet alloctions (when run on Foundation) from 161682 down to 17.
+
+// This works for my purposes, but I haven't tested it to make sure it's fully compatible with the standard version.
+
+- (BOOL)my_scanCharactersFromSet:(NSCharacterSet *)set intoString:(NSString **)value;
+{
+    NSRange matchedRange;
+    unsigned int currentLocation;
+    NSCharacterSet *skipSet;
+
+    currentLocation = [self scanLocation];
+
+    // Skip over characters
+    skipSet = [self charactersToBeSkipped];
+    while ([self isAtEnd] == NO) {
+        unichar ch;
+
+        ch = [[self string] characterAtIndex:currentLocation];
+        if ([skipSet characterIsMember:ch] == NO)
+            break;
+
+        currentLocation++;
+        [self setScanLocation:currentLocation];
+    }
+
+    matchedRange.location = currentLocation;
+    matchedRange.length = 0;
+
+    while ([self isAtEnd] == NO) {
+        unichar ch;
+
+        ch = [[self string] characterAtIndex:currentLocation];
+        if ([set characterIsMember:ch] == NO)
+            break;
+
+        currentLocation++;
+        [self setScanLocation:currentLocation];
+    }
+
+    matchedRange.length = currentLocation - matchedRange.location;
+
+    if (matchedRange.length == 0)
+        return NO;
+
+    if (value != NULL) {
+        *value = [[self string] substringWithRange:matchedRange];
+    }
+
+    return YES;
+}
+
+- (BOOL)scanIdentifierIntoString:(NSString **)stringPointer;
+{
+    NSString *start, *remainder;
+
+    if ([self scanString:@"?" intoString:stringPointer]) {
+        return YES;
+    }
+
+    if ([self scanCharacterFromSet:[NSScanner cdIdentifierStartCharacterSet] intoString:&start]) {
+        NSString *str;
+
+        if ([self my_scanCharactersFromSet:[NSScanner cdIdentifierCharacterSet] intoString:&remainder]) {
+            str = [start stringByAppendingString:remainder];
+        } else {
+            str = start;
+        }
+
+        if (stringPointer != NULL)
+            *stringPointer = str;
+
+        return YES;
+    }
+
+    return NO;
+}
+
+@end