macros.h

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/*
 * Copyright (c) 2008-2026 Jonathan Schleifer <js@nil.im>
 *
 * All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3.0 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * version 3.0 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3.0 along with this program. If not, see
 * <https://www.gnu.org/licenses/>.
 */

#ifndef OBJFW_MACROS_H
#define OBJFW_MACROS_H

#include "objfw-defs.h"

#ifndef __STDC_LIMIT_MACROS
# define __STDC_LIMIT_MACROS
#endif
#ifndef __STDC_CONSTANT_MACROS
# define __STDC_CONSTANT_MACROS
#endif

#include <limits.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <sys/time.h>

#include "platform.h"

#ifdef OF_OBJFW_RUNTIME
# ifdef OF_COMPILING_OBJFW
#  include "ObjFWRT.h"
# else
#  include <ObjFWRT/ObjFWRT.h>
# endif
#endif
#ifdef OF_APPLE_RUNTIME
# include <objc/objc.h>
# include <objc/runtime.h>
# include <objc/message.h>
#endif

#if defined(__GNUC__)
# define restrict __restrict__
#elif __STDC_VERSION__ < 199901L
# define restrict
#endif

#if __STDC_VERSION__ >= 201112L && !defined(static_assert)
/* C11 compiler, but old libc */
# define static_assert _Static_assert
#endif

#if defined(OF_HAVE__THREAD_LOCAL)
# define OF_HAVE_COMPILER_TLS
# ifdef OF_HAVE_THREADS_H
#  include <threads.h>
#  ifdef OF_AIX
/* AIX has a bug where thread_local is defined to "Thread_local;". */
#   undef thread_local
#   define thread_local _Thread_local
#  endif
# else
#  define thread_local _Thread_local
# endif
#elif defined(OF_HAVE___THREAD)
# define OF_HAVE_COMPILER_TLS
# define thread_local __thread
#endif

/*
 * Do not use compiler TLS when targeting the iOS simulator, as the iOS 9
 * simulator does not support it (fails at runtime).
 */
#if defined(OF_HAVE_COMPILER_TLS) && defined(OF_IOS) && defined(OF_X86)
# undef OF_HAVE_COMPILER_TLS
#endif

#ifdef __GNUC__
# define OF_INLINE inline __attribute__((__always_inline__))
# define OF_LIKELY(cond) (__builtin_expect(!!(cond), 1))
# define OF_UNLIKELY(cond) (__builtin_expect(!!(cond), 0))
# define OF_CONST_FUNC __attribute__((__const__))
# define OF_NO_RETURN_FUNC __attribute__((__noreturn__))
# define OF_WEAK_REF(sym) __attribute__((__weakref__(sym)))
# if defined(OF_ELF) || defined(OF_MACHO)
#  define OF_VISIBILITY_HIDDEN __attribute__((__visibility__("hidden")))
#  define OF_VISIBILITY_INTERNAL __attribute__((__visibility__("internal")))
# else
#  define OF_VISIBILITY_HIDDEN
#  define OF_VISIBILITY_INTERNAL
# endif
# define OF_MALLOC_FUNC __attribute__((__malloc__))
#else
# 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)
# define OF_VISIBILITY_HIDDEN
# define OF_VISIBILITY_INTERNAL
# define OF_MALLOC_FUNC
#endif

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

#ifdef __BIGGEST_ALIGNMENT__
# define OF_BIGGEST_ALIGNMENT __BIGGEST_ALIGNMENT__
#else
/* Hopefully no arch needs more than 16 byte alignment */
# define OF_BIGGEST_ALIGNMENT 16
#endif
/*
 * We use SSE inline assembly on AMD64 and x86, so it must never be smaller
 * than 16.
 */
#if (defined(OF_AMD64) || defined(OF_X86)) && OF_BIGGEST_ALIGNMENT < 16
# undef OF_BIGGEST_ALIGNMENT
# define OF_BIGGEST_ALIGNMENT 16
#endif

#define OF_PREPROCESSOR_CONCAT2(a, b) a##b
#define OF_PREPROCESSOR_CONCAT(a, b) OF_PREPROCESSOR_CONCAT2(a, b)
#define OF_PREPROCESSOR_STRINGIFY2(x) #x
#define OF_PREPROCESSOR_STRINGIFY(x) OF_PREPROCESSOR_STRINGIFY2(x)

#if __OBJFW_RUNTIME_ABI__ || (defined(OF_APPLE_RUNTIME) && defined(__OBJC2__))
# define OF_HAVE_NONFRAGILE_IVARS
#endif

#ifdef OF_HAVE_NONFRAGILE_IVARS
# define OF_RESERVE_IVARS(cls, num)
#else
# define OF_RESERVE_IVARS(cls, num)                    \
    @private                               \
        void *OF_PREPROCESSOR_CONCAT(_reserved_, cls)[num];
#endif

#ifdef __GNUC__
# define OF_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
#else
# define OF_GCC_VERSION 0
#endif

#define OF_STRINGIFY(s) OF_STRINGIFY2(s)
#define OF_STRINGIFY2(s) #s

#ifndef __has_feature
# define __has_feature(x) 0
#endif

#ifndef __has_attribute
# define __has_attribute(x) 0
#endif

#if __has_feature(objc_bool)
# undef YES
# define YES __objc_yes
# undef NO
# define NO __objc_no
# ifndef __cplusplus
#  undef true
#  define true ((bool)1)
#  undef false
#  define false ((bool)0)
# endif
#endif

#if !__has_feature(objc_instancetype)
# define instancetype id
#endif

#if __has_feature(blocks)
# define OF_HAVE_BLOCKS
#endif

#if __has_feature(objc_arc)
# define OF_RETURNS_RETAINED __attribute__((__ns_returns_retained__))
# define OF_RETURNS_NOT_RETAINED __attribute__((__ns_returns_not_retained__))
# define OF_RETURNS_INNER_POINTER \
    __attribute__((__objc_returns_inner_pointer__))
# define OF_CONSUMED __attribute__((__ns_consumed__))
# define OF_WEAK_UNAVAILABLE __attribute__((__objc_arc_weak_unavailable__))
#else
# define OF_RETURNS_RETAINED
# define OF_RETURNS_NOT_RETAINED
# define OF_RETURNS_INNER_POINTER
# define OF_CONSUMED
# define OF_WEAK_UNAVAILABLE
/*
 * undef them first, as new Clang versions have these as built-in defines even
 * when ARC is disabled.
 */
# undef __unsafe_unretained
# undef __bridge
# undef __autoreleasing
# define __unsafe_unretained
# define __bridge
# define __autoreleasing
#endif

#if __has_feature(objc_generics)
# define OF_HAVE_GENERICS
# define OF_GENERIC(...) <__VA_ARGS__>
#else
# define OF_GENERIC(...)
#endif

#if __has_feature(nullability)
# define OF_ASSUME_NONNULL_BEGIN _Pragma("clang assume_nonnull begin")
# define OF_ASSUME_NONNULL_END _Pragma("clang assume_nonnull end")
# define OF_NULLABLE_PROPERTY(...) (__VA_ARGS__, nullable)
# define OF_NULL_RESETTABLE_PROPERTY(...) (__VA_ARGS__, null_resettable)
#else
# define OF_ASSUME_NONNULL_BEGIN
# define OF_ASSUME_NONNULL_END
# define _Nonnull
# define _Nullable
# define _Null_unspecified
# define OF_NULLABLE_PROPERTY
# define OF_NULL_RESETTABLE_PROPERTY
# define nonnull
# define nullable
# define null_unspecified
#endif

#if __has_feature(objc_kindof)
# define OF_KINDOF(class_) __kindof class_
#else
# define OF_KINDOF(class_) id
#endif

#if __has_feature(objc_class_property)
# define OF_HAVE_CLASS_PROPERTIES
#endif

#if defined(__clang__) || OF_GCC_VERSION >= 405
# define OF_UNREACHABLE __builtin_unreachable();
#else
# define OF_UNREACHABLE abort();
#endif

#if defined(__clang__) || OF_GCC_VERSION >= 406
# define OF_SENTINEL __attribute__((__sentinel__))
# define OF_NO_RETURN __attribute__((__noreturn__))
#else
# define OF_SENTINEL
# define OF_NO_RETURN
#endif

#ifdef __clang__
# define OF_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
#else
# define OF_WARN_UNUSED_RESULT
#endif

#if __has_attribute(__unavailable__)
# define OF_UNAVAILABLE __attribute__((__unavailable__))
#else
# define OF_UNAVAILABLE
#endif

#if __has_attribute(__objc_requires_super__)
# define OF_REQUIRES_SUPER __attribute__((__objc_requires_super__))
#else
# define OF_REQUIRES_SUPER
#endif

#if __has_attribute(__objc_root_class__)
# define OF_ROOT_CLASS __attribute__((__objc_root_class__))
#else
# define OF_ROOT_CLASS
#endif

#if __has_attribute(__objc_subclassing_restricted__)
# define OF_SUBCLASSING_RESTRICTED \
    __attribute__((__objc_subclassing_restricted__))
#else
# define OF_SUBCLASSING_RESTRICTED
#endif

#if __has_attribute(__objc_method_family__)
# define OF_METHOD_FAMILY(f) __attribute__((__objc_method_family__(f)))
#else
# define OF_METHOD_FAMILY(f)
#endif

#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

#if __has_attribute(__swift_name__)
# define OF_SWIFT_NAME(name) __attribute__((__swift_name__(name)))
#else
# define OF_SWIFT_NAME(name)
#endif

#if defined(OF_APPLE_RUNTIME) || (defined(OF_OBJFW_RUNTIME) && \
    defined(__clang_major__) && __clang_major__ >= 21)
# if __has_attribute(__objc_direct__)
#  define OF_DIRECT __attribute__((__objc_direct__))
#  define OF_DIRECT_PROPERTY(...) (__VA_ARGS__, direct)
# endif
# if __has_attribute(__objc_direct_members__)
#  define OF_DIRECT_MEMBERS __attribute__((__objc_direct_members__))
# endif
#endif
#ifndef OF_DIRECT
# define OF_DIRECT
#endif
#ifndef OF_DIRECT_PROPERTY
# define OF_DIRECT_PROPERTY
#endif
#ifndef OF_DIRECT_MEMBERS
# define OF_DIRECT_MEMBERS
#endif

#ifdef OF_APPLE_RUNTIME
# 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_AMD64) || defined(OF_X86) || \
    defined(OF_ARM64) || defined(OF_ARM) || \
    defined(OF_POWERPC) || defined(OF_POWERPC64) || \
    defined(OF_MIPS64_N64) || defined(OF_MIPS) || \
    defined(OF_SPARC64) || defined(OF_SPARC) || \
    defined(OF_RISCV64) || defined(OF_LOONGARCH64)
#   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_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_AMD64) || defined(OF_X86) || defined(OF_ARM64)
#   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)) {              \
            OFLog(@"Failed to ensure condition in "     \
                @__FILE__ ":%d: " @#cond, __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 {                      \
        OFMethodNotFound(self, _cmd);       \
    } @catch (id e) {               \
        objc_release(self);         \
        @throw e;               \
    }                       \
                            \
    abort();
#endif
#ifdef __clang__
# define OF_DEALLOC_UNSUPPORTED                     \
    [self doesNotRecognizeSelector: _cmd];              \
                                    \
    abort();                            \
                                    \
    _Pragma("clang diagnostic push");               \
    _Pragma("clang diagnostic ignored \"-Wunreachable-code\""); \
    [super dealloc];    /* Get rid of a stupid warning */   \
    _Pragma("clang diagnostic pop");
#else
# 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)

static OF_INLINE uint16_t OF_CONST_FUNC
_OFByteSwap16Const(uint16_t i)
{
    return (i & UINT16_C(0xFF00)) >> 8 | (i & UINT16_C(0x00FF)) << 8;
}

static OF_INLINE uint32_t OF_CONST_FUNC
_OFByteSwap32Const(uint32_t i)
{
    return (i & UINT32_C(0xFF000000)) >> 24 |
        (i & UINT32_C(0x00FF0000)) >> 8 |
        (i & UINT32_C(0x0000FF00)) << 8 |
        (i & UINT32_C(0x000000FF)) << 24;
}

static OF_INLINE uint64_t OF_CONST_FUNC
_OFByteSwap64Const(uint64_t i)
{
    return (i & UINT64_C(0xFF00000000000000)) >> 56 |
        (i & UINT64_C(0x00FF000000000000)) >> 40 |
        (i & UINT64_C(0x0000FF0000000000)) >> 24 |
        (i & UINT64_C(0x000000FF00000000)) >> 8 |
        (i & UINT64_C(0x00000000FF000000)) << 8 |
        (i & UINT64_C(0x0000000000FF0000)) << 24 |
        (i & UINT64_C(0x000000000000FF00)) << 40 |
        (i & UINT64_C(0x00000000000000FF)) << 56;
}

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_AMD64) || defined(OF_X86)) && defined(__GNUC__)
    __asm__ (
        "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)
    );
#elif defined(OF_ARMV6) && defined(__GNUC__)
    __asm__ (
        "rev16  %0, %0"
        : "=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_AMD64) || defined(OF_X86)) && defined(__GNUC__)
    __asm__ (
        "bswap  %0"
        : "=q" (i)
        : "0" (i)
    );
#elif defined(OF_POWERPC) && defined(__GNUC__)
    __asm__ (
        "lwbrx  %0, 0, %1"
        : "=r" (i)
        : "r" (&i),
          "m" (i)
    );
#elif defined(OF_ARMV6) && defined(__GNUC__)
    __asm__ (
        "rev    %0, %0"
        : "=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_AMD64) && defined(__GNUC__)
    __asm__ (
        "bswap  %0"
        : "=r" (i)
        : "0" (i)
    );
#elif defined(OF_X86) && defined(__GNUC__)
    __asm__ (
        "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;
}

#if defined(__GNUC__) || defined(DOXYGEN)

# define OFByteSwap16(i) \
    (__builtin_constant_p(i) ? _OFByteSwap16Const(i) : _OFByteSwap16NonConst(i))

# define OFByteSwap32(i) \
    (__builtin_constant_p(i) ? _OFByteSwap32Const(i) : _OFByteSwap32NonConst(i))

# define OFByteSwap64(i) \
    (__builtin_constant_p(i) ? _OFByteSwap64Const(i) : _OFByteSwap64NonConst(i))
#else
# define OFByteSwap16(i) _OFByteSwap16Const(i)
# define OFByteSwap32(i) _OFByteSwap32Const(i)
# define OFByteSwap64(i) _OFByteSwap64Const(i)
#endif

static OF_INLINE uint32_t OF_CONST_FUNC
OFBitConvertFloatToUInt32(float f)
{
    uint32_t ret;
    memcpy(&ret, &f, 4);
    return ret;
}

static OF_INLINE float OF_CONST_FUNC
OFBitConvertUInt32ToFloat(uint32_t uInt32)
{
    float ret;
    memcpy(&ret, &uInt32, 4);
    return ret;
}

static OF_INLINE uint64_t OF_CONST_FUNC
OFBitConvertDoubleToUInt64(double d)
{
    uint64_t ret;
    memcpy(&ret, &d, 8);
    return ret;
}

static OF_INLINE double OF_CONST_FUNC
OFBitConvertUInt64ToDouble(uint64_t uInt64)
{
    double ret;
    memcpy(&ret, &uInt64, 8);
    return ret;
}

static OF_INLINE float OF_CONST_FUNC
OFByteSwapFloat(float f)
{
    return OFBitConvertUInt32ToFloat(OFByteSwap32(
        OFBitConvertFloatToUInt32(f)));
}

static OF_INLINE double OF_CONST_FUNC
OFByteSwapDouble(double d)
{
    return OFBitConvertUInt64ToDouble(OFByteSwap64(
        OFBitConvertDoubleToUInt64(d)));
}

#if defined(OF_BIG_ENDIAN) || defined(DOXYGEN)

# define OFFromBigEndian16(i) (i)

# define OFFromBigEndian32(i) (i)

# define OFFromBigEndian64(i) (i)

# define OFFromLittleEndian16(i) OFByteSwap16(i)

# define OFFromLittleEndian32(i) OFByteSwap32(i)

# define OFFromLittleEndian64(i) OFByteSwap64(i)

# define OFToBigEndian16(i) (i)

# define OFToBigEndian32(i) (i)

# define OFToBigEndian64(i) (i)

# define OFToLittleEndian16(i) OFByteSwap16(i)

# define OFToLittleEndian32(i) OFByteSwap32(i)

# define OFToLittleEndian64(i) OFByteSwap64(i)
#else
# define OFFromBigEndian16(i) OFByteSwap16(i)
# define OFFromBigEndian32(i) OFByteSwap32(i)
# define OFFromBigEndian64(i) OFByteSwap64(i)
# define OFFromLittleEndian16(i) (i)
# define OFFromLittleEndian32(i) (i)
# define OFFromLittleEndian64(i) (i)
# define OFToBigEndian16(i) OFByteSwap16(i)
# define OFToBigEndian32(i) OFByteSwap32(i)
# define OFToBigEndian64(i) OFByteSwap64(i)
# define OFToLittleEndian16(i) (i)
# define OFToLittleEndian32(i) (i)
# define OFToLittleEndian64(i) (i)
#endif

#if defined(OF_FLOAT_BIG_ENDIAN) || defined(DOXYGEN)

# define OFFromBigEndianFloat(f) (f)

# define OFFromBigEndianDouble(d) (d)

# define OFFromLittleEndianFloat(f) OFByteSwapFloat(f)

# define OFFromLittleEndianDouble(d) OFByteSwapDouble(d)

# define OFToBigEndianFloat(f) (f)

# define OFToBigEndianDouble(d) (d)

# define OFToLittleEndianFloat(f) OFByteSwapFloat(f)

# define OFToLittleEndianDouble(d) OFByteSwapDouble(d)
#else
# define OFFromBigEndianFloat(f) OFByteSwapFloat(f)
# define OFFromBigEndianDouble(d) OFByteSwapDouble(d)
# define OFFromLittleEndianFloat(f) (f)
# define OFFromLittleEndianDouble(d) (d)
# define OFToBigEndianFloat(f) OFByteSwapFloat(f)
# define OFToBigEndianDouble(d) OFByteSwapDouble(d)
# define OFToLittleEndianFloat(f) (f)
# define OFToLittleEndianDouble(d) (d)
#endif

#define OFRotateLeft(value, bits)                   \
    (((bits) % (sizeof(value) * 8)) > 0                 \
    ? ((value) << ((bits) % (sizeof(value) * 8))) |         \
    ((value) >> (sizeof(value) * 8 - ((bits) % (sizeof(value) * 8))))   \
    : (value))

#define OFRotateRight(value, bits)                  \
    (((bits) % (sizeof(value) * 8)) > 0                 \
    ? ((value) >> ((bits) % (sizeof(value) * 8))) |         \
    ((value) << (sizeof(value) * 8 - ((bits) % (sizeof(value) * 8))))   \
    : (value))

#define OFRoundUpToPowerOf2(pow2, value)    \
    (((value) + (pow2) - 1) & ~((pow2) - 1))

#define OF_ULONG_BIT (sizeof(unsigned long) * CHAR_BIT)

static OF_INLINE bool
OFBitSetIsSet(unsigned long *_Nonnull storage, size_t idx)
{
    return storage[idx / OF_ULONG_BIT] & (1ul << (idx % OF_ULONG_BIT));
}

static OF_INLINE void
OFBitSetSet(unsigned long *_Nonnull storage, size_t idx)
{
    storage[idx / OF_ULONG_BIT] |= (1ul << (idx % OF_ULONG_BIT));
}

static OF_INLINE void
OFBitSetClear(unsigned long *_Nonnull storage, size_t idx)
{
    storage[idx / OF_ULONG_BIT] &= ~(1ul << (idx % OF_ULONG_BIT));
}

static OF_INLINE void
OFZeroMemory(void *_Nonnull buffer_, size_t length)
{
    volatile unsigned char *buffer = (volatile unsigned char *)buffer_;

    while (buffer < (unsigned char *)buffer_ + length)
        *buffer++ = '\0';
}

static OF_INLINE bool
OFASCIIIsAlpha(char c)
{
    return ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
}

static OF_INLINE bool
OFASCIIIsDigit(char c)
{
    return (c >= '0' && c <= '9');
}

static OF_INLINE bool
OFASCIIIsAlnum(char c)
{
    return (OFASCIIIsAlpha(c) || OFASCIIIsDigit(c));
}

static OF_INLINE bool
OFASCIIIsSpace(char c)
{
    return (c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f' ||
        c == '\v');
}

static OF_INLINE char
OFASCIIToUpper(char c)
{
    return (c >= 'a' && c <= 'z' ? 'A' + (c - 'a') : c);
}

static OF_INLINE char
OFASCIIToLower(char c)
{
    return (c >= 'A' && c <= 'Z' ? 'a' + (c - 'A') : c);
}
#endif