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Andrei Panov AndreyPanov

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AndreyPanov / sethack.m

Created July 5, 2016 13:41 — forked from Catfish-Man/sethack.m

Demonstrating the trick of using stack-allocated mimics and sets for lookup tables instead of heap allocated keys and dictionaries

	// Compile with clang -framework Foundation sethack.m

	#import <Foundation/Foundation.h>
	#import <objc/runtime.h>

	/*
	CFHashBytes from http://www.opensource.apple.com/source/CF/CF-1153.18/CFUtilities.c
	*/
	#define ELF_STEP(B) T1 = (H << 4) + B; T2 = T1 & 0xF0000000; if (T2) T1 ^= (T2 >> 24); T1 &= (~T2); H = T1;