ObjFW  Diff

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/*
 * Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
 * Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
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# define OF_INLINE inline
# define OF_LIKELY(cond) (cond)
# define OF_UNLIKELY(cond) (cond)
# define OF_CONST_FUNC
# define OF_NO_RETURN_FUNC
# define OF_WEAK_REF(sym)
#endif

#ifdef __GNUC__
# define OF_ALIGN(alignment) __attribute__((__aligned__(alignment)))
#endif

#if __STDC_VERSION__ >= 201112L
# define OF_ALIGNOF(type) _Alignof(type)
# define OF_ALIGNAS(type) _Alignas(type)
#else
# define OF_ALIGNOF(type) __alignof__(type)
# define OF_ALIGNAS(type) __attribute__((__aligned__(__alignof__(type))))
# define OF_ALIGNAS(type) OF_ALIGN(OF_ALIGNOF(type))
#endif

#if __STDC_VERSION__ >= 201112L && defined(OF_HAVE_MAX_ALIGN_T)
# define OF_BIGGEST_ALIGNMENT _Alignof(max_align_t)
#else
# ifdef __BIGGEST_ALIGNMENT__
#  define OF_BIGGEST_ALIGNMENT __BIGGEST_ALIGNMENT__
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#if __has_attribute(__objc_designated_initializer__)
# define OF_DESIGNATED_INITIALIZER \
    __attribute__((__objc_designated_initializer__))
#else
# define OF_DESIGNATED_INITIALIZER
#endif

#if defined(__clang__) || OF_GCC_VERSION >= 405
# define OF_DEPRECATED(project, major, minor, msg)		\
    __attribute__((__deprecated__("Deprecated in " #project " "	\
    #major "." #minor ": " msg)))
#elif defined(__GNUC__)
# define OF_DEPRECATED(project, major, minor, msg) \
    __attribute__((__deprecated__))
#else
# define OF_DEPRECATED(project, major, minor, msg)
#endif

#if __has_attribute(__objc_boxable__)
# define OF_BOXABLE __attribute__((__objc_boxable__))
#else
# define OF_BOXABLE
#endif

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#if __has_attribute(__objc_direct_members__) && defined(OF_APPLE_RUNTIME)
# define OF_DIRECT_MEMBERS __attribute__((__objc_direct_members__))
#else
# define OF_DIRECT_MEMBERS
#endif

#ifdef OF_APPLE_RUNTIME
# if defined(OF_X86_64) || defined(OF_X86) || defined(OF_ARM64) || \
# if defined(OF_AMD64) || defined(OF_X86) || defined(OF_ARM64) || \
    defined(OF_ARM) || defined(OF_POWERPC)
#  define OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR
#  define OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR_STRET
# endif
#else
# if defined(OF_ELF)
#  if defined(OF_X86_64) || defined(OF_X86) || \
#  if defined(OF_AMD64) || defined(OF_X86) || \
    defined(OF_ARM64) || defined(OF_ARM) || defined(OF_POWERPC) || \
    defined(OF_MIPS) || defined(OF_SPARC64) || defined(OF_SPARC)
#   define OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR
#   if __OBJFW_RUNTIME_ABI__ >= 800
#    define OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR_STRET
#   endif
#  endif
# elif defined(OF_MACH_O)
#  if defined(OF_X86_64)
#  if defined(OF_AMD64)
#   define OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR
#   if __OBJFW_RUNTIME_ABI__ >= 800
#    define OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR_STRET
#   endif
#  endif
# elif defined(OF_WINDOWS)
#  if defined(OF_X86_64) || defined(OF_X86)
#  if defined(OF_AMD64) || defined(OF_X86)
#   define OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR
#   if __OBJFW_RUNTIME_ABI__ >= 800
#    define OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR_STRET
#   endif
#  endif
# endif
#endif

#define OFMaxRetainCount UINT_MAX

#ifdef OBJC_COMPILING_RUNTIME
# define OFEnsure(cond)							\
	do {								\
		if OF_UNLIKELY (!(cond))				\
			objc_error("ObjFWRT @ " __FILE__ ":"		\
			    OF_STRINGIFY(__LINE__),			\
			    "Failed to ensure condition:\n" #cond);	\
	} while(0)
#else
@class OFConstantString;
# ifdef __cplusplus
extern "C" {
# endif
extern void OFLog(OFConstantString *_Nonnull, ...);
# ifdef __cplusplus
}
# endif
# define OFEnsure(cond)							\
	do {								\
		if OF_UNLIKELY (!(cond)) {				\
			fprintf(stderr, "Failed to ensure condition "	\
			    "in " __FILE__ ":%d:\n" #cond "\n",		\
			OFLog(@"Failed to ensure condition in "		\
			    @__FILE__ ":%d: " @#cond, __LINE__);	\
			    __LINE__);					\
			abort();					\
		}							\
	} while (0)
#endif

#ifndef NDEBUG
# define OFAssert(...) OFEnsure(__VA_ARGS__)
#else
# define OFAssert(...)
#endif

#define OF_UNRECOGNIZED_SELECTOR OFMethodNotFound(self, _cmd);
#if __has_feature(objc_arc)
# define OF_INVALID_INIT_METHOD OFMethodNotFound(self, _cmd);
#else
# define OF_INVALID_INIT_METHOD				\
	@try {						\
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# define OF_DEALLOC_UNSUPPORTED						\
	[self doesNotRecognizeSelector: _cmd];				\
									\
	abort();							\
									\
	[super dealloc];	/* Get rid of a stupid warning */
#endif
#define OF_SINGLETON_METHODS			\
	- (instancetype)autorelease		\
	{					\
		return self;			\
	}					\
						\
	- (instancetype)retain			\
	{					\
		return self;			\
	}					\
						\
	- (void)release				\
	{					\
	}					\
						\
	- (unsigned int)retainCount		\
	{					\
		return OFMaxRetainCount;	\
	}					\
						\
	- (void)dealloc				\
	{					\
		OF_DEALLOC_UNSUPPORTED		\
	}

#define OF_CONSTRUCTOR(prio)					\
	static void __attribute__((__constructor__(prio)))	\
	OF_PREPROCESSOR_CONCAT(constructor, __LINE__)(void)
#define OF_DESTRUCTOR(prio)					\
	static void __attribute__((__destructor__(prio)))	\
	OF_PREPROCESSOR_CONCAT(destructor, __LINE__)(void)
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}

static OF_INLINE uint16_t OF_CONST_FUNC
OFByteSwap16NonConst(uint16_t i)
{
#if defined(OF_HAVE_BUILTIN_BSWAP16)
	return __builtin_bswap16(i);
#elif (defined(OF_X86_64) || defined(OF_X86)) && defined(__GNUC__)
#elif (defined(OF_AMD64) || defined(OF_X86)) && defined(__GNUC__)
	__asm__ (
	    "xchgb	%h0, %b0"
	    : "=Q"(i)
	    : "0"(i)
	    "xchg{b}	{ %h0, %b0 | %b0, %h0 }"
	    : "=Q" (i)
	    : "0" (i)
	);
#elif defined(OF_POWERPC) && defined(__GNUC__)
	__asm__ (
	    "lhbrx	%0, 0, %1"
	    : "=r"(i)
	    : "r"(&i), "m"(i)
	    : "=r" (i)
	    : "r" (&i),
	      "m" (i)
	);
#elif defined(OF_ARMV6) && defined(__GNUC__)
	__asm__ (
	    "rev16	%0, %0"
	    : "=r"(i)
	    : "0"(i)
	    : "=r" (i)
	    : "0" (i)
	);
#else
	i = (i & UINT16_C(0xFF00)) >> 8 |
	    (i & UINT16_C(0x00FF)) << 8;
#endif
	return i;
}

static OF_INLINE uint32_t OF_CONST_FUNC
OFByteSwap32NonConst(uint32_t i)
{
#if defined(OF_HAVE_BUILTIN_BSWAP32)
	return __builtin_bswap32(i);
#elif (defined(OF_X86_64) || defined(OF_X86)) && defined(__GNUC__)
#elif (defined(OF_AMD64) || defined(OF_X86)) && defined(__GNUC__)
	__asm__ (
	    "bswap	%0"
	    : "=q"(i)
	    : "0"(i)
	    : "=q" (i)
	    : "0" (i)
	);
#elif defined(OF_POWERPC) && defined(__GNUC__)
	__asm__ (
	    "lwbrx	%0, 0, %1"
	    : "=r"(i)
	    : "r"(&i), "m"(i)
	    : "=r" (i)
	    : "r" (&i),
	      "m" (i)
	);
#elif defined(OF_ARMV6) && defined(__GNUC__)
	__asm__ (
	    "rev	%0, %0"
	    : "=r"(i)
	    : "0"(i)
	    : "=r" (i)
	    : "0" (i)
	);
#else
	i = (i & UINT32_C(0xFF000000)) >> 24 |
	    (i & UINT32_C(0x00FF0000)) >>  8 |
	    (i & UINT32_C(0x0000FF00)) <<  8 |
	    (i & UINT32_C(0x000000FF)) << 24;
#endif
	return i;
}

static OF_INLINE uint64_t OF_CONST_FUNC
OFByteSwap64NonConst(uint64_t i)
{
#if defined(OF_HAVE_BUILTIN_BSWAP64)
	return __builtin_bswap64(i);
#elif defined(OF_X86_64) && defined(__GNUC__)
#elif defined(OF_AMD64) && defined(__GNUC__)
	__asm__ (
	    "bswap	%0"
	    : "=r"(i)
	    : "0"(i)
	    : "=r" (i)
	    : "0" (i)
	);
#elif defined(OF_X86) && defined(__GNUC__)
	__asm__ (
	    "bswap	%%eax\n\t"
	    "bswap	%%edx\n\t"
	    "xchgl	%%eax, %%edx"
	    : "=A"(i)
	    : "0"(i)
	    "bswap	{%%}eax\n\t"
	    "bswap	{%%}edx\n\t"
	    "xchg{l}	{ %%eax, %%edx | edx, eax }"
	    : "=A" (i)
	    : "0" (i)
	);
#else
	i = (uint64_t)OFByteSwap32NonConst(
	    (uint32_t)(i & UINT32_C(0xFFFFFFFF))) << 32 |
	    OFByteSwap32NonConst((uint32_t)(i >> 32));
#endif
	return i;