JensAyton’s gists

JensAyton / gist:3728578

Created September 15, 2012 16:01

	@implementation Foo

	- (id) foo
	{
	return [self bar];
	}


	- (id) bar
	{

JensAyton / gist:3855499

Created October 8, 2012 23:00

Some of the macros in NSObjCRuntime.h just aren’t ugly enough.

	#undef MIN
	#define MIN__(A,B,C) ({ __typeof__(A) __a##C = (A); __typeof__(B) __b##C = (B); __a##C < __b##C ? __a##C : __b##C; })
	#define MIN_(A,B,C) MIN__(A,B,C)
	#define MIN(A,B) MIN_(A,B,__COUNTER__)

	#undef MAX
	#define MAX__(A,B,C) ({ __typeof__(A) __a##C = (A); __typeof__(B) __b##C = (B); __a##C < __b##C ? __b##C : __a##C; })
	#define MAX_(A,B,C) MAX__(A,B,C)
	#define MAX(A,B) MAX_(A,B,__COUNTER__)

JensAyton / gist:5284761

Last active December 15, 2015 15:49

	// Expansion of JATExpandLiteral(@"foo: {foo}; bar: {bar}; baz: {baz}", foo, bar, baz)
	JAT_DoExpandTemplateUsingMacroKeysAndValues(@"foo: {foo}; bar: {bar}; baz: {baz}", (JATNameArray){ @"foo", @"bar", @"baz", ((void)0) }, (JATParameterArray){ JATCastParameter(foo), JATCastParameter(bar), JATCastParameter(baz), ((void)0) }, 3)

JensAyton / gist:9010577

Last active August 29, 2015 13:56

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

	@interface Test: NSObject
	@end

	@interface Test (Dynamic)

	- (void)foo:(float)x :(float)y;

JensAyton / oops.c

Last active August 29, 2015 13:56 — forked from davepeck/oops.c

One example of cleanup without using goto. (This isn't an opinion on what Apple “should have” done, it’s just an answer to a specific question on Twitter. It would have done nothing to avoid the actual bug.) I also removed the unused variable “signedHashes”.

	static OSStatus
	SSLVerifySignedServerKeyExchange(SSLContext *ctx, bool isRsa, SSLBuffer signedParams,
	uint8_t *signature, UInt16 signatureLen)
	{
	SSLBuffer hashCtx;
	hashCtx.date = 0;

	OSStatus err = SSLVerifySignedServerKeyExchangeInner(ctx, isRsa, signedParams, signature, signatureLen, &hashCtx);

	SSLFreeBuffer(hashCtx);

JensAyton / JADictionaryOfVariableBindings.h

Created April 28, 2014 22:28

NSDictionaryOfVariableBindings at compile time, just because.

	#import <Foundation/Foundation.h>

	#define JADictionaryOfVariableBindings(...) \
	[NSDictionary dictionaryWithObjects:(const id []){ __VA_ARGS__ } \
	forKeys:(const NSString *[]){ JATEMPLATE_MAP(JATEMPLATE_NAME_FROM_ARG, __VA_ARGS__) } \
	count:JATEMPLATE_ARGUMENT_COUNT(__VA_ARGS__)]

	#define JATEMPLATE_NAME_FROM_ARG(ITEM) @#ITEM

JensAyton / gist:4c6df3f1ca7d32c15fef

Created June 9, 2014 07:13

try() for discriminated-union error handling in Swift

	import Foundation


	// Because the real thing crashes
	enum Result {
	case Value(Any)
	case Error(NSError?)
	}

JensAyton / format.h

Created December 10, 2015 08:00

Macro for pasting ANSI escape codes together, based on https://twitter.com/velartrill/status/674797360774569984. This version requires GCC/Clang extensions for handling zero-length macro __VA_ARGS__es, because I’m lazy, but it could be done without. Note that this is an awful idea because sooner or later you’ll want to output to a text file and …

	#ifndef format_h
	#define format_h


	#define reset "0"
	#define bold "1"
	#define red "31"

	#define format(first, ...) \
	"\e[" first join_format_codes(__VA_ARGS__) "m"

JensAyton / lolif.m

Created January 5, 2017 23:02

Something something named arguments

	struct ifparams {
	#if __has_feature(objc_arc)
	__unsafe_unretained
	#endif
	dispatch_block_t then, otherwise;
	};

	static inline void iff(bool condition, struct ifparams params) {
	((condition?params.then:params.otherwise)?:^{})();
	}

JensAyton / blah.cpp

Last active March 7, 2017 18:24

	extern "C" {
	// This is global, but you can call it what you like
	inline void MyPrefixedCFShow(const void *object) {
	// Redeclared system function is local scope and counts as extern "C"
	extern void CFShow(const void * object);
	CFShow(object);
	}
	}

	class DumbThing {

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