/*
 * Copyright (c) 2008-2023 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.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#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)))
#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)
#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))))
#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__
# else
#  /* Hopefully no arch needs more than 16 byte alignment */
#  define OF_BIGGEST_ALIGNMENT 16
# endif
#endif

#define OF_PREPROCESSOR_CONCAT2(a, b) a##b
#define OF_PREPROCESSOR_CONCAT(a, b) OF_PREPROCESSOR_CONCAT2(a, b)

#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

#ifdef __GNUC__
# define OF_DEPRECATED(project, major, minor, msg)		\
    __attribute__((__deprecated__("Deprecated in " #project " "	\
    #major "." #minor ": " msg)))
#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 __has_attribute(__objc_direct__) && defined(OF_APPLE_RUNTIME)
# define OF_DIRECT __attribute__((__objc_direct__))
#else
# define OF_DIRECT
#endif
#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_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_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_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)
#   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) {				\
		[self release];				\
		@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;
}

#ifdef __GNUC__
# 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
OFFloatToRawUInt32(float f)
{
	uint32_t ret;
	memcpy(&ret, &f, 4);
	return ret;
}

static OF_INLINE float
OFRawUInt32ToFloat(uint32_t uInt32)
{
	float ret;
	memcpy(&ret, &uInt32, 4);
	return ret;
}

static OF_INLINE uint64_t
OFDoubleToRawUInt64(double d)
{
	uint64_t ret;
	memcpy(&ret, &d, 8);
	return ret;
}

static OF_INLINE double
OFRawUInt64ToDouble(uint64_t uInt64)
{
	double ret;
	memcpy(&ret, &uInt64, 8);
	return ret;
}

static OF_INLINE float OF_CONST_FUNC
OFByteSwapFloat(float f)
{
	return OFRawUInt32ToFloat(OFByteSwap32(OFFloatToRawUInt32(f)));
}

static OF_INLINE double OF_CONST_FUNC
OFByteSwapDouble(double d)
{
	return OFRawUInt64ToDouble(OFByteSwap64(OFDoubleToRawUInt64(d)));
}

#ifdef OF_BIG_ENDIAN
# 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

#ifdef OF_FLOAT_BIG_ENDIAN
# 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))

static OF_INLINE bool
OFBitsetIsSet(unsigned char *_Nonnull storage, size_t idx)
{
	return storage[idx / CHAR_BIT] & (1u << (idx % CHAR_BIT));
}

static OF_INLINE void
OFBitsetSet(unsigned char *_Nonnull storage, size_t idx)
{
	storage[idx / CHAR_BIT] |= (1u << (idx % CHAR_BIT));
}

static OF_INLINE void
OFBitsetClear(unsigned char *_Nonnull storage, size_t idx)
{
	storage[idx / CHAR_BIT] &= ~(1u << (idx % CHAR_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
