macros.h File Reference

#include <stdlib.h>

Include dependency graph for macros.h:

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

Macros
#define	SWAP(t, x, y)
#define	NEW(p, type)
#define	FREE(p)
#define	ADD(head, p)
#define	DELETE(head, p)

Macro Definition Documentation

ADD

#define ADD	(		head,
			p
	)

Value:

if (head)                        \
    {                                \
        p->next       = head;        \
        p->prev       = head->prev;  \
        head->prev    = p;           \
        p->prev->next = p;           \
    }                                \
    else                             \
    {                                \
        head       = p;              \
        head->next = head->prev = p; \
    }

DELETE

#define DELETE	(		head,
			p
	)

Value:

if (head)                    \
    {                            \
        if (head == head->next)  \
            head = NULL;         \
        else if (p == head)      \
            head = head->next;   \
        p->next->prev = p->prev; \
        p->prev->next = p->next; \
        FREE(p);                 \
    }

FREE

#define FREE

(

p

)

Value:

if (p)               \
    {                    \
        free((char *)p); \
        p = NULL;        \
    }

NEW

#define NEW	(		p,
			type
	)

Value:

if ((p = (type *)malloc(sizeof(type))) == NULL) \
    {                                               \
        printf("Out of Memory!\n");                 \
        exit(0);                                    \
    }

SWAP

#define SWAP	(		t,
			x,
			y
	)

Value:

{                 \
        t = x;        \
        x = y;        \
        y = t;        \
    }