Do you guys have a boilerplate that you are very used to build code on top of?
I have one like this (sans include guard which depend on header file name):
#include <sys/cdefs.h>
#include <stdarg.h>
#include <stdint.h>
#include <stddef.h>
#include <sys/types.h>
// Feature testers
#ifndef __has_feature
#define __has_feature(x) 0
#endif
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif
#ifndef __has_extension
#define __has_extension(x) 0
#endif
#ifndef __has_attribute
#define __has_attribute(x) 0
#endif
// __inline
#if __has_attribute(always_inline)
#define __inline static inline __attribute__((always_inline))
#else // !__has_attribute(always_inline)
#define __inline static inline
#endif// __has_attribute(always_inline)
// __restrict
#ifndef __cplusplus
#ifndef __restrict
#if __STDC_VERSION__ >= 199901L
#define __restrict restrict
#else // __STDC_VERSION__ < 199901L
#define __restrict
#endif // __STDC_VERSION__ >= 199901L
#endif // !defined(__restrict)
#endif // !defined(__cplusplus)
// noreturn (__noreturn and unreachable())
#if __has_attribute(noreturn)
#define __noreturn __attribute__((noreturn))
#if __has_builtin(__builtin_unreachable)
#define unreachable() __builtin_unreachable()
#else // !__has_builtin(__builtin_unreachable)
#define unreachable() do {} while (0)
#endif // __has_builtin(unreachable)
#else // !__has_attribute(noreturn)
#define __noreturn
#define unreachable() do {} while (0)
#endif // __has_attribute(noreturn)
// Deprecated/unavalible with messages
#undef __deprecated
#undef __unavailable
#if __has_attribute(deprecated)
#if __has_extension(attribute_deprecated_with_message)
#define __deprecated(_msg) __attribute__((deprecated(_msg)))
#else // !__has_extension(attribute_deprecated_with_message)
#define __deprecated(_msg) __attribute__((deprecated))
#endif // __has_extension(attribute_deprecated_with_message)
#else // !__has_attribute(deprecated)
#define __deprecated(_msg)
#endif // __has_attribute(deprecated)
#if __has_attribute(unavailable)
#if __has_extension(attribute_unavailable_with_message)
#define __unavailable(_msg) __attribute__((unavailable(_msg)))
#else // !__has_extension(attribute_unavailable_with_message)
#define __unavailable(_msg) __attribute__((unavailable))
#endif // __has_extension(attribute_unavailable_with_message)
#else // !__has_attribute(unavailable)
#define __unavailable(_msg)
#endif // __has_attribute(unavailable)
#if __has_extension(enumerator_attributes)
#define __e_deprecated(_msg) __deprecated(_msg)
#define __e_unavailable(_msg) __unavailable(_msg)
#else // !__has_extension(enumerator_attributes)
#define __e_deprecated(_msg)
#define __e_unavailable(_msg)
#endif // __has_extension(enumerator_attributes)
// Format strings
#if __has_attribute(format)
#define __format(...) __attribute__((format(__VA_ARGS__)))
#else // __has_attribute(format)
#define __format(...)
#endif
// C-safe Objective-C type declaration
#if defined(__OBJC__)
#import <Foundation/Foundation.h>
#define __class @class
#else // !defined(__OBJC__)
#include <objc/runtime.h>
#define __class typedef struct objc_object
#endif // defined(__OBJC__)
// Objective-C instancetype
#if defined(__OBJC__)
#if !__has_feature(objc_instancetype)
typedef id instancetype
#endif // !__has_feature(objc_instancetype)
#endif // defined(__OBJC__)
// Enumerations
#define __enum(_name, _type) enum _name : _type; enum _name
// Some convenience Objective-C functions and macros
__class NSString;
#define NSStringConstant(_name, _value) extern NSString *const _name;
#if defined(__OBJC__)
__BEGIN_DECLS
__inline __format(NSString, 1, 0) NSString *NSSTRv(NSString *format, va_list
args)
{
NSString *string = [[NSString alloc] initWithFormat:format
arguments:args];
#if !__has_feature(objc_arc) && !__has_feature(objc_gc)
[string autorelease];
#endif
return string;
}
__inline __format(NSString, 1, 2) NSString *NSSTR(NSString *format, ...)
{
va_list args;
va_start(args, format);
NSString *string = NSSTRv(format, args);
va_end(args);
return string;
}
__END_DECLS
#endif // defined(__OBJC__)
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