TC官方文档翻译06----Ordered Tree对象API(Tokyo Cabinet/Tokyo Tyarnt 文档系列)

/**
* 转载请注明出处, 由于个人技术能力有限, 英语水平欠缺,
* 有翻译不合适或错误的地方, 请纠正,
* 希望不要因为我的错误误导您, 希望您的智慧可以加入.
* @translator: selfimpr
* @mail: [email protected]
* @blog: http://blog.csdn.net/lgg201
*/

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有序树 APID

typedef struct _TCTREEREC { // 树的节点元素

int32_t ksiz; //key 的大小

int32_t vsiz; // 值的大小

struct _TCTREEREC *left; // 左子节点

struct _TCTREEREC *right; // 右子节点

} TCTREEREC;

typedef struct { //

TCTREEREC *root; // 根节点

TCTREEREC * cur; // 当前节点

uint64_t rnum; // 记录数量

uint64_t msiz; // 记录总大小

TCCMP cmp; // 用于比较的函数指针

void *cmpop; // 比较函数的一个参数 , 具体见 tctreenew2 函数

} TCTREE;

TCTREE *tctreenew(void);

直接调用 tctreenew2 创建树 , 传入的参数为 : tccmplexical, NULL.

TCTREE *tctreenew2(TCCMP cmp, void *cmpop);

根据传入的自定义比较函数和一个隐式参数创建树对象 . 创建的过程仅初始化了 TCTREE 结构定义的各个属性 , 其中 cmp 是两条记录值比较时候使用的函数 , 在调用时 , 该函数将会接受到 5 个参数 , 分别是 : (a 记录的 key 指针 , a 记录的大小 , b 记录的 key 指针 , b 记录的大小 , 预定义的参数 cmpop), 其中第五个参数 cmpop 就是在创建的时候指定的 cmpop. 对于自定义比较函数 cmp 而言 , 已经有一些内建的函数 : tccmplexical( 默认的 .), tccmpdecimal, tccmpint32, tccmpint64

TCTREE *tctreedup(const TCTREE *tree);

复制一棵树对象

void tctreedel(TCTREE *tree);

释放整棵树

void tctreeput(TCTREE *tree, const void *kbuf, int ksiz, const void *vbuf, int vsiz);

将一条记录存储到树中

void tctreeput2(TCTREE *tree, const char *kstr, const char *vstr);

存储一条记录到树的字符串版本 .

bool tctreeputkeep(TCTREE *tree, const void *kbuf, int ksiz, const void *vbuf, int vsiz);

存储一条记录到树中 , 如果该 key 已经存在 , 则不做修改 .

bool tctreeputkeep2(TCTREE *tree, const char *kstr, const char *vstr);

tctreeputkeep 的字符串版本 .

void tctreeputcat(TCTREE *tree, const void *kbuf, int ksiz, const void *vbuf, int vsiz);

存储一条记录到树中 , 如果该 key 已经存在 , 则对其值做连接操作 .

void tctreeputcat2(TCTREE *tree, const char *kstr, const char *vstr);

tctreeputcat 的字符串版本 .

bool tctreeout(TCTREE *tree, const void *kbuf, int ksiz);

从树中移除指定 key 的数据

bool tctreeout2(TCTREE *tree, const char *kstr);

tctreeout 的字符串版本

const void *tctreeget(TCTREE *tree, const void *kbuf, int ksiz, int *sp);

通过指定的 key 获取一条记录的值 , 传入的指针 sp 将会被改变为返回记录的值的大小

const char *tctreeget2(TCTREE *tree, const char *kstr);

tctreeget 的字符串版本

void tctreeiterinit(TCTREE *tree);

初始化树的迭代器 , 实际上就是把树结构中的 cur 指向树的最左子节点

const void *tctreeiternext(TCTREE *tree, int *sp);

返回树的当前迭代元素 , 修改 sp 为元素大小 , 并移动迭代指针

const char *tctreeiternext2(TCTREE *tree);

tctreeiternext 的字符串版本

uint64_t tctreernum(const TCTREE *tree);

返回树当前记录数量

uint64_t tctreemsiz(const TCTREE *tree);

返回树的内存大小

TCLIST *tctreekeys(const TCTREE *tree);

返回树中所有的 key 的列表对象

TCLIST *tctreevals(const TCTREE *tree);

返回当前树中所有值的列表对象

int tctreeaddint(TCTREE *tree, const void *kbuf, int ksiz, int num);

向指定 key 的值上增加 num 大小 , 并返回相加后的值

double tctreeadddouble(TCTREE *tree, const void *kbuf, int ksiz, double num);

tctreeaddint double 版本

void tctreeclear(TCTREE *tree);

完全释放一个树

void tctreecutfringe(TCTREE *tree, int num);

删除树的 num 个外围子节点 . 算法中 , 首先对树中的所有节点广度优先遍历 , 放入一个数组中 , 然后对该数组从后向前进行释放节点 .

void *tctreedump(const TCTREE *tree, int *sp);

序列化树 , sp 记录序列化结果的长度 .

TCTREE *tctreeload(const void *ptr, int size, TCCMP cmp, void *cmpop);

从一个序列化串中加载一个树 , cmp cmpop 意义同 tctreenew 一样 , ptr 是序列化串的指针 , size 是其大小 .

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