[数据结构]C语言实现：循环双链表

Person.h

#ifndef PERSON_H
#define PERSON_H

typedef enum Sex_enum
{
    Male,
    Female
} Sex_t;

typedef struct Person_struct
{
    char m_Name[32];
    Sex_t m_Sex;
    int m_Age;
} Person_t;

static inline void Person_Print(const Person_t * person)
{
    if(!person)
    {
        printf("[ ]");
    }
    else
    {
        printf("[ Name: %s, Sex: %s, Age: %d ]",
			person->m_Name,
			person->m_Sex == Male ? "Male" : "Female",
			person->m_Age);
    }
}

#endif

CDList.h

#ifndef CDLIST_H
#define CDLIST_H

#include 
#include "Person.h"

typedef struct CDListNode_struct
{
    int m_ID;
    Person_t * m_Person;
    struct CDListNode_struct * m_Prev;
    struct CDListNode_struct * m_Next;
} CDListNode_t;

typedef struct
{
    CDListNode_t * m_Head;
    size_t m_Count;
} CDList_t;

bool CDList_Init(CDList_t * list);
bool CDList_Insert(CDList_t * list, int index, const Person_t * newPerson);
bool CDList_Append(CDList_t * list, const Person_t * newPerson);
bool CDList_Delete(CDList_t * list, int index);
bool CDList_Update(CDList_t * list, int index, const Person_t * newPerson);
void CDList_Reverse(CDList_t * list);
void CDList_Empty(CDList_t * list);
bool CDList_Sort(CDList_t * list);
int CDList_IndexOf(const CDList_t * list, const char * name);
Person_t * CDList_GetData(const CDList_t * list, int index);

void CDList_Print(const CDList_t * list);
void CDList_PrintReversely(const CDList_t * list);

static inline size_t CDList_Count(const CDList_t * list)
{
    return list->m_Count;
}

static inline bool CDList_IsEmpty(const CDList_t * list)
{
	return list->m_Count == 0;
}

#endif

CDList.c

#include 
#include 
#include 
#include 
#include "CDList.h"

static int CurrentMaxID = 1;

static void SelectionSort(Person_t array[], int firstIndex, int lastIndex)
{
	Person_t temp;
	int minIndex = -1;

	for(int i = firstIndex; i < lastIndex; i++)
	{
		int j = -1;

		minIndex = i;
		for(j = i + 1; j <= lastIndex; j++)
		{
			if(array[minIndex].m_Age > array[j].m_Age)
				minIndex = j;
		}

		if(minIndex != i)
		{
			temp = array[i];
			array[i] = array[minIndex];
			array[minIndex] = temp;
		}
	}
}

bool CDList_Init(CDList_t * list)
{
	CDListNode_t * node = NULL;

	if(!list)
		return false;

	node = malloc(sizeof(CDListNode_t));
	if(!node)
		return false;
	
	node->m_ID = -1;
	node->m_Prev = node;
	node->m_Next = node;
	node->m_Person = NULL;

	list->m_Head = node;
	list->m_Count = 0;

	return true;
}

bool CDList_Insert(CDList_t * list, int index, const Person_t * newPerson)
{
	CDListNode_t * node = NULL;
	Person_t * person = NULL;
	CDListNode_t * p = NULL;

	if(!list || !newPerson)
		return false;
	
	if(index < 0)
		index = 0;
	if(index > list->m_Count)
		index = list->m_Count;
	
	node = malloc(sizeof(CDListNode_t));
	if(!node)
		return false;
	
	person = malloc(sizeof(Person_t));
	if(!person)
	{
		free(node);
		return false;
	}
	*person = *newPerson;

	p = list->m_Head;
	for(int i = 0; i < index; i++, p = p->m_Next)
		;

	node->m_ID = CurrentMaxID++;
	node->m_Person = person;
	node->m_Prev = p;
	node->m_Next = p->m_Next;
	
	p->m_Next->m_Prev = node;
	p->m_Next = node;
	
	list->m_Count++;
	
	return true;
}

bool CDList_Append(CDList_t * list, const Person_t * newPerson)
{
	return CDList_Insert(list, list->m_Count, newPerson);
}

bool CDList_Delete(CDList_t * list, int index)
{
	CDListNode_t * p = NULL;

	if(!list)
		return false;
	if(index < 0 || index >= list->m_Count)
		return false;
	if(list->m_Count == 0)
		return false;

	p = list->m_Head->m_Next;
	for(int i = 0; i < index; i++, p = p->m_Next)
		;
	
	p->m_Prev->m_Next = p->m_Next;
	p->m_Next->m_Prev = p->m_Prev;
	
	list->m_Count--;

	return true;
}

bool CDList_Update(CDList_t * list, int index, const Person_t * newPerson)
{
	CDListNode_t * p = NULL;

	if(!list || !newPerson)
		return false;
	if(index < 0 || index >= list->m_Count)
		return false;
	
	p = list->m_Head->m_Next;
	for(int i = 0; i < index; i++, p = p->m_Next)
		;
	
	*p->m_Person = *newPerson;
	return true;
}

void CDList_Reverse(CDList_t * list)
{
	CDListNode_t * p = NULL;
	CDListNode_t * q = NULL;
	CDListNode_t * r = NULL;

	if(!list)
		return;
	
	if(list->m_Count < 2)
		return;
	
	p = list->m_Head;
	q = p->m_Next;
	while(q != list->m_Head)
	{
		r = q->m_Next;
		
		q->m_Next = p;
		q->m_Prev = r;
		p->m_Prev = q;

		p = q;
		q = r;
	}
	list->m_Head->m_Next = p;
}

void CDList_Empty(CDList_t * list)
{
	CDListNode_t * p = NULL;
	CDListNode_t * q = NULL;

	if(!list)
		return;
	
	p = list->m_Head;
	while(p != list->m_Head)
	{
		q = p->m_Next;
		free(p);
		p = q;
	}

	list->m_Head->m_Next = list->m_Head;
	list->m_Count = 0;
}

bool CDList_Sort(CDList_t * list)
{
	Person_t * array = NULL;
	CDListNode_t * p = NULL;
	size_t count = 0;

	count = list->m_Count;
	array = malloc(sizeof(Person_t) * count);
	if(!array)
		return false;
	
	p = list->m_Head->m_Next;
	for(int i = 0; i < count; i++, p = p->m_Next)
		array[i] = *p->m_Person;
	
	// 下面用选择排序法对array[]进行排序
	SelectionSort(array, 0, count - 1);

	CDList_Empty(list);
	for(int i = 0; i < count; i++)
	{
		CDList_Insert(list, list->m_Count, &array[i]);
	}

	return true;
}

int CDList_IndexOf(const CDList_t * list, const char * name)
{
	CDListNode_t * p = NULL;
	int i = 0;
	size_t nameLength = 0;

	if(!list)
		return -1;
	
	if(list->m_Count == 0)
		return -1;
	
	p = list->m_Head->m_Next;
	nameLength = strlen(name);
	for(i = 0; i < list->m_Count; i++, p = p->m_Next)
	{
		size_t currentNameLength = 0;
		size_t maxNameLength = 0;
		
		currentNameLength = strlen(p->m_Person->m_Name);
		maxNameLength = nameLength >= currentNameLength ? nameLength : currentNameLength;

		if(strncmp(name, p->m_Person->m_Name, maxNameLength) == 0)
			break;
	}

	return i != list->m_Count ? i : -1;
}

Person_t * CDList_GetData(const CDList_t * list, int index)
{
	CDListNode_t * p = NULL;

	if(!list)
		return NULL;
	
	if(index < 0 || index >= list->m_Count)
		return NULL;
	
	p = list->m_Head->m_Next;
	for(int i = 0; i < index; i++, p = p->m_Next)
		;
	
	return p->m_Person;
}

void CDList_Print(const CDList_t * list)
{
	CDListNode_t * p = NULL;

	if(!list)
		return;
	
	p = list->m_Head->m_Next;
	printf("{\n");
	for(int i = 0; i < list->m_Count; i++, p = p->m_Next)
	{
		printf("  [ ID: %d, Person: ", p->m_ID);
		Person_Print(p->m_Person);
		printf(" ]\n");
	}
	printf("}\n");
}

void CDList_PrintReversely(const CDList_t * list)
{
	CDListNode_t * p = NULL;

	if(!list)
		return;
	
	p = list->m_Head->m_Prev;
	printf("{\n");
	for(int i = 0; i < list->m_Count; i++, p = p->m_Prev)
	{
		printf("  [ ID: %d, Person: ", p->m_ID);
		Person_Print(p->m_Person);
		printf(" ]\n");
	}
	printf("}\n");
}