#include <stdarg.h>
#include <sys/types.h>
#include <string.h>
#include <assert.h>
#include "class/interface.h"

Include dependency graph for class/class.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
struct	class_ptr

Macros
#define	_ISOC99_SOURCE

#define	CLASS_MAGIC 0xFEFE

#define	CLASS(name)

#define	EXTENDS(parent) const char _[sizeof(struct c_##parent)]

#define	_NULL NULL

#define	CREATE_CLASS(name, _parent, ...)

#define	INSTANCE(class, name)

#define	INIT_CLASS(class) ((class)->init? (class)->init() : (class))

#define	GET_CLASS(object) (INIT_CLASS((class_ptr )((void)(object) - sizeof(void))))

#define	IFACE_GET(class, iface) (interfaceGet(&((class)->impl),(iface)))

#define	HAS_PARENT(class) (NULL != ((class)->parent) && INIT_CLASS((class)->parent))

#define	IS_OBJECT(obj) ((GET_CLASS((obj)))->magic == CLASS_MAGIC)

#define	INSTANCE_OF(class, obj) ((GET_CLASS((obj))) == _##class)

#define	_CALL(_class, _iface, method, ...)

#define	CALL(object, _iface, method, ...)

#define	RETCALL(object, _iface, method, ret, ...)

#define	PARENTCALL(object, _iface, method, ...)

Typedefs
typedef class_ptr(*	fptr_classInit) (void)

Detailed Description

My own class implementation for C. It combines a data structure with a set of dynamically linked methods defined by an interface. A dynamically linked method will be called via a selector method which in turn gets the implementation stored in the class.

Author: Georg Hopp

Copyright: Copyright © 2012 Georg Hopp

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

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 General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file class/class.h.

Data Structure Documentation

struct class

Definition at line 133 of file class/class.h.

Collaboration diagram for class_ptr:

Data Fields
struct iface_impl	impl
fptr_classInit	init
const int	magic
size_t	object_size
class_ptr	parent

Macro Definition Documentation

#define _CALL	(	_class,
		_iface,
		method,
		...
	)

Value:

do {                                                                        \
        class_ptr class = _class;                                               \
        iface = (struct i_##_iface *)IFACE_GET(class, &i_##_iface);             \
        while ((NULL == iface || NULL == iface->method) && HAS_PARENT(class)) { \
            class = class->parent;                                              \
            iface = (struct i_##_iface *)IFACE_GET(class, &i_##_iface);         \
        }                                                                       \
        assert(NULL != iface->method);                                          \
    } while(0)

Todo:: actually i use gcc feature ## for variadoc... think about a way to make this standard.

Definition at line 95 of file class/class.h.

#define _ISOC99_SOURCE

Definition at line 38 of file class/class.h.

#define _NULL NULL

Definition at line 52 of file class/class.h.

#define CALL	(	object,
		_iface,
		method,
		...
	)

Value:

do {                                                         \
        struct i_##_iface * iface;                               \
		_CALL(GET_CLASS(object), _iface, method, ##__VA_ARGS__); \
        iface->method(object, ##__VA_ARGS__);                    \
    } while(0)

Definition at line 106 of file class/class.h.

Referenced by classClone(), classDelete(), hashableHandleDouble(), loggerLog(), observerUpdate(), serialize(), subjectAttach(), subjectDetach(), subjectNotify(), and unserialize().

#define CLASS ( name )

Value:

struct c_##name;                     \
    typedef struct c_##name * name;      \
    extern struct class * const _##name; \
    struct c_##name

Definition at line 43 of file class/class.h.

#define CLASS_MAGIC 0xFEFE

Definition at line 41 of file class/class.h.

#define CREATE_CLASS	(	name,
		_parent,
		...
	)

Value:

static struct class c_##name;                   \
    static class_ptr _classInit##name##_(void) {    \
        c_##name.parent = _##_parent;               \
        c_##name.init   = NULL;                     \
        return &c_##name;                           \
    }                                               \
    static struct class c_##name = {                \
		CLASS_MAGIC,                                \
        NULL,                                       \
        sizeof(struct c_##name),                    \
        _classInit##name##_,                        \
		INIT_IFACE_IMPL(__VA_ARGS__)                \
    }; struct class * const _##name = &c_##name;    \
    struct c_##name##_object { void * class; struct c_##name data; }

Definition at line 53 of file class/class.h.

#define EXTENDS ( parent ) const char _[sizeof(struct c_##parent)]

Definition at line 49 of file class/class.h.

Referenced by CLASS().

#define GET_CLASS ( object ) (INIT_CLASS(*(class_ptr *)((void*)(object) - sizeof(void*))))

Definition at line 84 of file class/class.h.

#define HAS_PARENT ( class ) (NULL != ((class)->parent) && INIT_CLASS((class)->parent))

Definition at line 86 of file class/class.h.

Referenced by hashableGetHash().

#define IFACE_GET	(	class,
		iface
	)	(interfaceGet(&((class)->impl),(iface)))

Definition at line 85 of file class/class.h.

Referenced by hashableGetHash().

#define INIT_CLASS ( class ) ((class)->init? (class)->init() : (class))

Definition at line 83 of file class/class.h.

#define INSTANCE	(	class,
		name
	)

Value:

struct c_##class##_object _##name;    \
    class name = &(_##name.data);         \
    struct c_##class##_object _##name = { \
        &c_##class,

create a static instance of a class.

Todo:: this macro requires to close the initializer with an extra curly brancket. This is not nice...find a way to prevent this.

Definition at line 77 of file class/class.h.

#define INSTANCE_OF	(	class,
		obj
	)	((GET_CLASS((obj))) == _##class)

Definition at line 89 of file class/class.h.

Referenced by main().

#define IS_OBJECT ( obj ) ((GET_CLASS((obj)))->magic == CLASS_MAGIC)

Definition at line 88 of file class/class.h.

#define PARENTCALL	(	object,
		_iface,
		method,
		...
	)

Value:

do {                                                        \
        struct i_##_iface * iface;                              \
        class_ptr pc_class = GET_CLASS((object));               \
        assert(HAS_PARENT(pc_class));                           \
		_CALL(pc_class->parent, _iface, method, ##__VA_ARGS__); \
        iface->method(object, ##__VA_ARGS__);                   \
    } while(0)

Definition at line 120 of file class/class.h.

Referenced by httpRequestCtor(), httpRequestDtor(), httpResponseCtor(), and httpResponseDtor().

#define RETCALL	(	object,
		_iface,
		method,
		ret,
		...
	)

Value:

do {                                                         \
        struct i_##_iface * iface;                               \
		_CALL(GET_CLASS(object), _iface, method, ##__VA_ARGS__); \
        ret = iface->method(object, ##__VA_ARGS__);              \
    } while(0)

Definition at line 113 of file class/class.h.

Referenced by authenticate(), classNewParams(), httpIntroSizeGet(), httpIntroToString(), indexUuid(), streamReaderRead(), and streamWriterWrite().

Typedef Documentation

typedef class_ptr(* fptr_classInit) (void)

Definition at line 132 of file class/class.h.

Data Structures

Macros

Typedefs

Detailed Description

Data Structure Documentation

Macro Definition Documentation

Typedef Documentation