redis源码分析之zipmap.h

最新推荐文章于 2024-08-24 22:35:54 发布

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本文详细介绍了Zipmap数据结构的API，包括创建、设置、删除、遍历、获取元素等操作，以及如何检查元素存在性和获取Zipmap的长度和二进制表示长度。Zipmap是一种用于存储小数量键值对的高效数据结构。

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#ifndef _ZIPMAP_H
#define _ZIPMAP_H

//zipmap相关api
unsigned char *zipmapNew(void);
unsigned char *zipmapSet(unsigned char *zm, unsigned char *key, unsigned int klen, unsigned char *val, unsigned int vlen, int *update);
unsigned char *zipmapDel(unsigned char *zm, unsigned char *key, unsigned int klen, int *deleted);
unsigned char *zipmapRewind(unsigned char *zm);
unsigned char *zipmapNext(unsigned char *zm, unsigned char **key, unsigned int *klen, unsigned char **value, unsigned int *vlen);
int zipmapGet(unsigned char *zm, unsigned char *key, unsigned int klen, unsigned char **value, unsigned int *vlen);
int zipmapExists(unsigned char *zm, unsigned char *key, unsigned int klen);
unsigned int zipmapLen(unsigned char *zm);
size_t zipmapBlobLen(unsigned char *zm);
void zipmapRepr(unsigned char *p);