Get the correct string encoding from an NSURLResponse

NSURLResponse+QUELL_IANACharacterSetEncoding.m

@interface NSURLResponse(QUELL_IANACharacterSetEncoding)
- (NSStringEncoding) QUELL_stringEncoding;
@end

@implementation NSURLResponse(QUELL_IANACharacterSetEncoding)
- (NSStringEncoding) QUELL_stringEncoding {
	NSStringEncoding	result				= [NSString defaultCStringEncoding];
	CFStringEncoding	cfEncoding			= CFStringGetSystemEncoding();
	NSString		*ianaCharSetName		= [self textEncodingName];
	
	cfEncoding = CFStringConvertIANACharSetNameToEncoding((__bridge CFStringRef)ianaCharSetName);
	result = CFStringConvertEncodingToNSStringEncoding(cfEncoding);
	return result;
}
@end