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Apple’s documentation is at http://developer.apple.com/documentation/Cocoa/Reference/Foundation/ObjC_classic/Classes/NSCharacterSet.html#//apple_ref/occ/cl/NSCharacterSet.

The whitespaceAndNewlineCharacterSet includes U+2028 (Line Separator) and U+2029 (Paragraph Separator), in addition to what’s listed.

Well, this seems like a good place to put this… I am currently writing some code generation type things and after trawling around [http://www.unicode.org] for far too long trying to find simple answers to some questions I decided to do the obvious thing to answer my questions: write some code.

First, the output… it is the contents of all of the ‘off the shelf’ character sets split into two groups, 7-bit meaning 0-127(7f) and 8-bit, everything else up to 255. I know that isn’t all of it but i am not interested in anything that isn’t a part of a valid indentifier name / method name etc. All non-printable values are shown as a 2-digit HEX value.

** The Output **

Size of a ‘unichar’ is: 2 Character set (0-127): alphanumericCharacterSet 7-Bit: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ^ ` a b c d e f g h i j k l m n o p q r s t u v w x y z 8-Bit: a8 aa af b2 b3 b4 b5 b8 b9 ba bc bd be c0 c1 c2 c3 c4 c5 c6 c7 c8 c9 ca cb cc cd ce cf d0 d1 d2 d3 d4 d5 d6 d8 d9 da db dc dd de df e0 e1 e2 e3 e4 e5 e6 e7 e8 e9 ea eb ec ed ee ef f0 f1 f2 f3 f4 f5 f6 f8 f9 fa fb fc fd fe ff

Character set (0-127): controlCharacterSet 7-Bit: 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 7f 8-Bit: 80 81 82 83 84 85 86 87 88 89 8a 8b 8c 8d 8e 8f 90 91 92 93 94 95 96 97 98 99 9a 9b 9c 9d 9e 9f

Character set (0-127): decimalDigitCharacterSet 7-Bit: 0 1 2 3 4 5 6 7 8 9 8-Bit:

Character set (0-127): decomposableCharacterSet 7-Bit: 8-Bit: c0 c1 c2 c3 c4 c5 c7 c8 c9 ca cb cc cd ce cf d1 d2 d3 d4 d5 d6 d9 da db dc dd e0 e1 e2 e3 e4 e5 e7 e8 e9 ea eb ec ed ee ef f1 f2 f3 f4 f5 f6 f9 fa fb fc fd ff

Character set (0-127): illegalCharacterSet 7-Bit: 8-Bit:

Character set (0-127): letterCharacterSet 7-Bit: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ^ ` a b c d e f g h i j k l m n o p q r s t u v w x y z 8-Bit: a8 aa af b4 b5 b8 ba c0 c1 c2 c3 c4 c5 c6 c7 c8 c9 ca cb cc cd ce cf d0 d1 d2 d3 d4 d5 d6 d8 d9 da db dc dd de df e0 e1 e2 e3 e4 e5 e6 e7 e8 e9 ea eb ec ed ee ef f0 f1 f2 f3 f4 f5 f6 f8 f9 fa fb fc fd fe ff

Character set (0-127): lowercaseLetterCharacterSet 7-Bit: a b c d e f g h i j k l m n o p q r s t u v w x y z 8-Bit: aa b5 ba df e0 e1 e2 e3 e4 e5 e6 e7 e8 e9 ea eb ec ed ee ef f0 f1 f2 f3 f4 f5 f6 f8 f9 fa fb fc fd fe ff

Character set (0-127): nonBaseCharacterSet 7-Bit: 8-Bit:

Character set (0-127): punctuationCharacterSet 7-Bit: ! “ % ‘ ( ) , - . / : ; ? [ \ ] { } 8-Bit: a1 ab ad b7 bb bf

Character set (0-127): uppercaseLetterCharacterSet 7-Bit: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 8-Bit: c0 c1 c2 c3 c4 c5 c6 c7 c8 c9 ca cb cc cd ce cf d0 d1 d2 d3 d4 d5 d6 d8 d9 da db dc dd de

Character set (0-127): whitespaceAndNewlineCharacterSet 7-Bit: 09 0a 0d
8-Bit: a0

Character set (0-127): whitespaceCharacterSet 7-Bit: 09
8-Bit: a0

CharSetGen.app has exited with status 0.

And in case anybody is interested, here is the source code for the program.

#import <Cocoa/Cocoa.h>

// —————————————————————————————- // dumpCharacterSet // // Print out the contents of the given character set so we can see exactly what’s inside // the thing for reference. // // —————————————————————————————- void dumpCharacterSet( NSString *name ) { unichar idx; NSCharacterSet *cset = [NSCharacterSet performSelector: NSSelectorFromString(name)];

printf("Character set (0-127): %s\n7-Bit: ", [name cString]);

for( idx = 0; idx < 256; idx++ )
{
	if ( 128 == idx ) {
		printf( "\n8-Bit: " );
	}

	if ([cset characterIsMember: idx])
	{
		if ( isprint(idx) ) {
			printf( "%c ", idx);
		}
		else {
			printf( "%02x ", idx);
		}
	}
}
printf("\n\n"); }

// —————————————————————————————- // CharSetGen // // This is a utility that is used to generate NSCharacterSet objects that can be used to // perform various parsing / testing functions for the coders. // // —————————————————————————————- int main(int argc, const char *argv[]) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

// Reference output...
dumpCharacterSet( @"alphanumericCharacterSet" );
dumpCharacterSet( @"controlCharacterSet" );
dumpCharacterSet( @"decimalDigitCharacterSet" );
dumpCharacterSet( @"decomposableCharacterSet" );
dumpCharacterSet( @"illegalCharacterSet" );
dumpCharacterSet( @"letterCharacterSet" );
dumpCharacterSet( @"lowercaseLetterCharacterSet" );
dumpCharacterSet( @"nonBaseCharacterSet" );
dumpCharacterSet( @"punctuationCharacterSet" );
dumpCharacterSet( @"uppercaseLetterCharacterSet" );
dumpCharacterSet( @"whitespaceAndNewlineCharacterSet" );
dumpCharacterSet( @"whitespaceCharacterSet" );

[pool release];
return 0; }

Sean Charles.