CDN_DNS/radix/radix.h

#ifndef RADIX_HEADER_736213980973149671328765
#define RADIX_HEADER_736213980973149671328765

#include "stdio.h"
#include "stdlib.h"
#include "string.h"

#define VALID_RULE      1
#define INVALID_RULE    0
#define RULE_NOT_FOUND -1

struct routing_record {
    unsigned long     _ip[2];
    unsigned short    _rule;
    unsigned          _mask:7;
    unsigned          _valid:1;
};

struct radix_node {
    struct radix_node*     _l;
    struct radix_node*     _r;
    struct routing_record  _data;
};

struct radix_holder {
    struct radix_node* _root;
    size_t _size;
};

typedef struct radix_node*     radix_node_t;
typedef struct radix_holder*   radix_holder_t;
typedef struct routing_record* record_t;

radix_holder_t create_holder();
radix_node_t create_node(record_t record);
static radix_node_t clone_node(radix_node_t n);
static void split_node(struct radix_node* n, unsigned bit);

int destory_holder(struct radix_holder*);
int destory_node(struct radix_node*);

int radix_insert(radix_holder_t, record_t);
int radix_search(radix_holder_t, record_t);
 
#endif