VTPG_Common.h

#pragma once
// Copyright (c) 2008-2010, Vincent Gable.
// vincent.gable@gmail.com

//based off of http://www.dribin.org/dave/blog/archives/2008/09/22/convert_to_nsstring/
NSString * VTPG_DDToStringFromTypeAndValue(const char * typeCode, void * value);

// WARNING: if NO_LOG_MACROS is #define-ed, than THE ARGUMENT WILL NOT BE EVALUATED
#ifndef NO_LOG_MACROS


#define LOG_EXPR(_X_) do{\
	__typeof__(_X_) _Y_ = (_X_);\
	const char * _TYPE_CODE_ = @encode(__typeof__(_X_));\
	NSString *_STR_ = VTPG_DDToStringFromTypeAndValue(_TYPE_CODE_, &_Y_);\
	if(_STR_)\
		NSLog(@"%s = %@", #_X_, _STR_);\
	else\
		NSLog(@"Unknown _TYPE_CODE_: %s for expression %s in function %s, file %s, line %d", _TYPE_CODE_, #_X_, __func__, __FILE__, __LINE__);\
}while(0)

#define LOG_NS(...) NSLog(__VA_ARGS__)
#define LOG_FUNCTION()	NSLog(@"%s", __func__)

#else /* NO_LOG_MACROS */

#define LOG_EXPR(_X_)
#define LOG_NS(...)
#define LOG_FUNCTION()
#endif /* NO_LOG_MACROS */



// http://www.wilshipley.com/blog/2005/10/pimp-my-code-interlude-free-code.html
static inline BOOL IsEmpty(id thing) {
	return thing == nil ||
			([thing respondsToSelector:@selector(length)] && [(NSData *)thing length] == 0) ||
			([thing respondsToSelector:@selector(count)]  && [(NSArray *)thing count] == 0);
}