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57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
#ifndef _TYPES_H_
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#define _TYPES_H_
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#include <stdint.h>
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#include <errno.h>
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#ifndef uint8_t
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typedef unsigned char uint8_t;
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#endif
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typedef uint8_t type_t;
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typedef uint64_t key_t;
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#define TYPE_INT8 ((type_t)0)
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#define TYPE_INT16 ((type_t)1)
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#define TYPE_INT32 ((type_t)2)
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#define TYPE_INT64 ((type_t)3)
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#define TYPE_FLOAT ((type_t)4)
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#define TYPE_DOUBLE ((type_t)5)
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#define TYPE_STRING ((type_t)6)
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#define TYPE_BINARY ((type_t)7)
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#define EXTYPE_NULL ((type_t)0x00)
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#define EXTYPE_UNIQUE ((type_t)0x10)
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#define EXTYPE_NONNULL ((type_t)0x20)
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#define EXTYPE_FOREIGNKEY ((type_t)0x40)
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// 获得本类型 index 相对于 buffer 头的偏移
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int type_offset(type_t t);
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// 为类型 type 创建索引
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// 返回：索引头节点的指针 index
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void* create_index(int fd, type_t t, void* buf);
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// 加载类型 type 的索引
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// 返回：索引头节点的指针 index
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void* load_index(int fd, type_t t, uint64_t ptr, void* buf);
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// 移除 index 并释放空间
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int remove_index(int fd, type_t t, void* index);
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// 统计索引条数
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// 返回：索引条数
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uint64_t count_items(int fd, type_t t, void* index);
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// 插入一条索引
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int insert_item(int fd, type_t t, void* index, key_t k, uint64_t ptr);
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// 使用索引查找目标
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// 返回：ptr
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uint64_t find_item_by_key(int fd, type_t t, void* index, key_t k);
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// 使用索引删除项
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// 返回：ptr
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uint64_t remove_item_by_key(int fd, type_t t, void* index, key_t k);
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#endif |