随想录（编写简单资源管理代码）

#include 
#include 
#include 
#include 

#define STATUS int
#define OK 0
#define ERROR -1

#define MAX_RECORD_NUMBER 100
#define MAX_NAME_LEN 32
#define PHONE_NUMBER 9

struct TELEPH_MAIL_LIST
{
  char name[MAX_NAME_LEN];
  int phone[PHONE_NUMBER];
};

static struct TELEPH_MAIL_LIST g_mail_list[MAX_RECORD_NUMBER]; 

void module_init()
{
  memset(g_mail_list, 0, sizeof(g_mail_list));
} 

struct TELEPH_MAIL_LIST* alloc_record()
{
  int index;
  
  for(index = 0; index < MAX_RECORD_NUMBER; index++)
  {
    if(0 == strlen(g_mail_list[index].name))
    {
      return &g_mail_list[index];
    }
  }

  return NULL;
}

void del_record(struct TELEPH_MAIL_LIST* p_mail_list)
{
  if(p_mail_list < 0 || p_mail_list >= &g_mail_list[MAX_RECORD_NUMBER])
  {
    return;
  }

  memset(p_mail_list, 0, sizeof(struct TELEPH_MAIL_LIST));  
}


int find_record(char* name)
{
  int index;

  for(index = 0; index < MAX_RECORD_NUMBER; index++)
  {
    if(0 == strncmp(g_mail_list[index].name, name, MAX_NAME_LEN))
    {
      return index;
    }
  }

  return ERROR;
}

STATUS add_record(char* name, int phone[])
{
  struct TELEPH_MAIL_LIST* p_mail_list;

  if(ERROR != find_record(name))
  {
    return ERROR;
  }

  p_mail_list = alloc_record();
  if(NULL == p_mail_list)
  {
    return ERROR;
  }

  strncpy(p_mail_list->name, name, strlen(name));
  memmove(p_mail_list->phone, phone, sizeof(int) * PHONE_NUMBER);
  return OK;
}

void show_record()
{
  int index ;
  int number;

  for(index = 0; index < MAX_RECORD_NUMBER; index ++)
  {
    if(0 == strlen(g_mail_list[index].name))
    {
      continue;
    }

    printf("[name] : %s\n", g_mail_list[index].name);
    printf("[phon] : ");
    
    for(number = 0; number < PHONE_NUMBER; number ++)
    {
      printf("%d", g_mail_list[index].phone[number]);
    }
    printf("\n");
  }
}

int main(int argc, char* argv[])
{
  struct TELEPH_MAIL_LIST* p_mail_list;
  int phone[] = {1,2,3,4,5,6,7,8,9};

  module_init();
  add_record("hello", phone);
  show_record();

  del_record(&g_mail_list[find_record("hello")]);
  show_record();

  return 1;
}