/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018, 2019, 2020
* 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.
*/
#import "macros.h"
#import "platform.h"
#if !defined(__has_feature) || !__has_feature(nullability)
# ifndef _Nonnull
# define _Nonnull
# endif
# ifndef _Nullable
# define _Nullable
# endif
#endif
typedef uint32_t (*_Nonnull objc_hashtable_hash_func)(const void *_Nonnull key);
typedef bool (*_Nonnull objc_hashtable_equal_func)(const void *_Nonnull key1,
const void *_Nonnull key2);
struct objc_class {
Class _Nonnull isa;
Class _Nullable superclass;
const char *_Nonnull name;
unsigned long version;
unsigned long info;
long instanceSize;
struct objc_ivar_list *_Nullable ivars;
struct objc_method_list *_Nullable methodList;
struct objc_dtable *_Nonnull DTable;
Class _Nullable *_Nullable subclassList;
void *_Nullable siblingClass;
struct objc_protocol_list *_Nullable protocols;
void *_Nullable GCObjectType;
unsigned long ABIVersion;
int32_t *_Nonnull *_Nullable ivarOffsets;
struct objc_property_list *_Nullable propertyList;
};
enum objc_class_info {
OBJC_CLASS_INFO_CLASS = 0x001,
OBJC_CLASS_INFO_METACLASS = 0x002,
OBJC_CLASS_INFO_NEW_ABI = 0x010,
OBJC_CLASS_INFO_SETUP = 0x100,
OBJC_CLASS_INFO_LOADED = 0x200,
OBJC_CLASS_INFO_DTABLE = 0x400,
OBJC_CLASS_INFO_INITIALIZED = 0x800
};
struct objc_object {
Class _Nonnull isa;
};
struct objc_selector {
uintptr_t UID;
const char *_Nullable typeEncoding;
};
struct objc_method {
struct objc_selector selector;
IMP _Nonnull implementation;
};
struct objc_method_list {
struct objc_method_list *_Nullable next;
unsigned int count;
struct objc_method methods[1];
};
struct objc_category {
const char *_Nonnull categoryName;
const char *_Nonnull className;
struct objc_method_list *_Nullable instanceMethods;
struct objc_method_list *_Nullable classMethods;
struct objc_protocol_list *_Nullable protocols;
};
struct objc_ivar {
const char *_Nonnull name;
const char *_Nonnull typeEncoding;
unsigned int offset;
};
struct objc_ivar_list {
unsigned int count;
struct objc_ivar ivars[1];
};
struct objc_method_description {
const char *_Nonnull name;
const char *_Nonnull typeEncoding;
};
struct objc_method_description_list {
int count;
struct objc_method_description list[1];
};
struct objc_protocol_list {
struct objc_protocol_list *_Nullable next;
long count;
Protocol *__unsafe_unretained _Nonnull list[1];
};
#if __has_attribute(__objc_root_class__)
__attribute__((__objc_root_class__))
#endif
@interface Protocol
{
@public
Class _Nonnull isa;
const char *_Nonnull name;
struct objc_protocol_list *_Nullable protocolList;
struct objc_method_description_list *_Nullable instanceMethods;
struct objc_method_description_list *_Nullable classMethods;
}
@end
enum objc_property_attributes {
OBJC_PROPERTY_READONLY = 0x01,
OBJC_PROPERTY_GETTER = 0x02,
OBJC_PROPERTY_ASSIGN = 0x04,
OBJC_PROPERTY_READWRITE = 0x08,
OBJC_PROPERTY_RETAIN = 0x10,
OBJC_PROPERTY_COPY = 0x20,
OBJC_PROPERTY_NONATOMIC = 0x40,
OBJC_PROPERTY_SETTER = 0x80
};
enum objc_property_extended_attributes {
OBJC_PROPERTY_SYNTHESIZED = 0x1,
OBJC_PROPERTY_DYNAMIC = 0x2,
OBJC_PROPERTY_PROTOCOL = 0x3,
OBJC_PROPERTY_ATOMIC = 0x4,
OBJC_PROPERTY_WEAK = 0x8,
OBJC_PROPERTY_STRONG = 0x10,
OBJC_PROPERTY_UNSAFE_UNRETAINED = 0x20
};
struct objc_property {
const char *_Nonnull name;
unsigned char attributes, extendedAttributes;
struct {
const char *_Nullable name;
const char *_Nullable typeEncoding;
} getter, setter;
};
struct objc_property_list {
unsigned int count;
struct objc_property_list *_Nullable next;
struct objc_property properties[1];
};
struct objc_static_instances {
const char *_Nonnull className;
id _Nullable instances[1];
};
struct objc_symtab {
unsigned long unknown;
struct objc_selector *_Nullable selectorRefs;
uint16_t classDefsCount;
uint16_t categoryDefsCount;
void *_Nonnull defs[1];
};
struct objc_module {
unsigned long version; /* 9 = non-fragile */
unsigned long size;
const char *_Nullable name;
struct objc_symtab *_Nonnull symtab;
};
struct objc_hashtable_bucket {
const void *_Nonnull key, *_Nonnull object;
uint32_t hash;
};
struct objc_hashtable {
objc_hashtable_hash_func hash;
objc_hashtable_equal_func equal;
uint32_t count, size;
struct objc_hashtable_bucket *_Nonnull *_Nullable data;
};
struct objc_sparsearray {
struct objc_sparsearray_data {
void *_Nullable next[256];
} *_Nonnull data;
uint8_t indexSize;
};
struct objc_dtable {
struct objc_dtable_level2 {
#ifdef OF_SELUID24
struct objc_dtable_level3 {
IMP _Nullable buckets[256];
} *_Nonnull buckets[256];
#else
IMP _Nullable buckets[256];
#endif
} *_Nonnull buckets[256];
};
extern void objc_register_all_categories(struct objc_symtab *_Nonnull);
extern struct objc_category *_Nullable *_Nullable
objc_categories_for_class(Class _Nonnull);
extern void objc_unregister_all_categories(void);
extern void objc_initialize_class(Class _Nonnull);
extern void objc_update_dtable(Class _Nonnull);
extern void objc_register_all_classes(struct objc_symtab *_Nonnull);
extern Class _Nullable objc_classname_to_class(const char *_Nonnull, bool);
extern void objc_unregister_class(Class _Nonnull);
extern void objc_unregister_all_classes(void);
extern uint32_t objc_hash_string(const void *_Nonnull);
extern bool objc_equal_string(const void *_Nonnull, const void *_Nonnull);
extern struct objc_hashtable *_Nonnull objc_hashtable_new(
objc_hashtable_hash_func, objc_hashtable_equal_func, uint32_t);
extern struct objc_hashtable_bucket objc_deleted_bucket;
extern void objc_hashtable_set(struct objc_hashtable *_Nonnull,
const void *_Nonnull, const void *_Nonnull);
extern void *_Nullable objc_hashtable_get(struct objc_hashtable *_Nonnull,
const void *_Nonnull);
extern void objc_hashtable_delete(struct objc_hashtable *_Nonnull,
const void *_Nonnull);
extern void objc_hashtable_free(struct objc_hashtable *_Nonnull);
extern void objc_register_selector(struct objc_selector *_Nonnull);
extern void objc_register_all_selectors(struct objc_symtab *_Nonnull);
extern void objc_unregister_all_selectors(void);
extern struct objc_sparsearray *_Nonnull objc_sparsearray_new(uint8_t);
extern void *_Nullable objc_sparsearray_get(struct objc_sparsearray *_Nonnull,
uintptr_t);
extern void objc_sparsearray_set(struct objc_sparsearray *_Nonnull, uintptr_t,
void *_Nullable);
extern void objc_sparsearray_free(struct objc_sparsearray *_Nonnull);
extern struct objc_dtable *_Nonnull objc_dtable_new(void);
extern void objc_dtable_copy(struct objc_dtable *_Nonnull,
struct objc_dtable *_Nonnull);
extern void objc_dtable_set(struct objc_dtable *_Nonnull, uint32_t,
IMP _Nullable);
extern void objc_dtable_free(struct objc_dtable *_Nonnull);
extern void objc_dtable_cleanup(void);
extern void objc_init_static_instances(struct objc_symtab *_Nonnull);
extern void objc_forget_pending_static_instances(void);
extern void objc_zero_weak_references(id _Nonnull);
#ifdef OF_HAVE_THREADS
extern void objc_global_mutex_lock(void);
extern void objc_global_mutex_unlock(void);
extern void objc_global_mutex_free(void);
#else
# define objc_global_mutex_lock()
# define objc_global_mutex_unlock()
# define objc_global_mutex_free()
#endif
static inline IMP _Nullable
objc_dtable_get(const struct objc_dtable *_Nonnull dtable, uint32_t idx)
{
#ifdef OF_SELUID24
uint8_t i = idx >> 16;
uint8_t j = idx >> 8;
uint8_t k = idx;
return dtable->buckets[i]->buckets[j]->buckets[k];
#else
uint8_t i = idx >> 8;
uint8_t j = idx;
return dtable->buckets[i]->buckets[j];
#endif
}
#if defined(OF_ELF)
# if defined(OF_X86_64) || defined(OF_X86) || defined(OF_POWERPC) || \
defined(OF_ARM64) || defined(OF_ARM) || \
defined(OF_MIPS64_N64) || defined(OF_MIPS) || \
defined(OF_SPARC64) || defined(OF_SPARC)
# define OF_ASM_LOOKUP
# endif
#elif defined(OF_MACH_O)
# if defined(OF_X86_64) || defined(OF_POWERPC)
# define OF_ASM_LOOKUP
# endif
#elif defined(OF_WINDOWS)
# if defined(OF_X86_64) || defined(OF_X86)
# define OF_ASM_LOOKUP
# endif
#endif
#define OBJC_ERROR(...) \
{ \
fprintf(stderr, "[objc @ " __FILE__ ":%d] ", __LINE__); \
fprintf(stderr, __VA_ARGS__); \
fprintf(stderr, "\n"); \
fflush(stderr); \
abort(); \
OF_UNREACHABLE \
}
@interface DummyObject
{
Class _Nonnull isa;
}
@property (readonly, nonatomic) bool allowsWeakReference;
+ (void)initialize;
+ (bool)resolveClassMethod: (nonnull SEL)selector;
+ (bool)resolveInstanceMethod: (nonnull SEL)selector;
- (nonnull id)retain;
- (void)release;
- (nonnull id)autorelease;
- (nonnull id)copy;
- (nonnull id)mutableCopy;
- (bool)retainWeakReference;
@end