add types

include/types.h

@@ -0,0 +1,38 @@
+#ifndef _TYPES_H_
+#define _TYPES_H_
+
+#include <stdint.h>
+#include <errno.h>
+
+#define TYPE_INT8   0
+#define TYPE_INT16  1
+#define TYPE_INT32  2
+#define TYPE_INT64  3
+#define TYPE_FLOAT  4
+#define TYPE_DOUBLE 5
+#define TYPE_STRING 6
+#define TYPE_BINARY 7
+
+#define EXTYPE_NULL         0x00
+#define EXTYPE_UNIQUE       0x40
+#define EXTYPE_NONNULL      0x80
+#define EXTYPE_FOREIGNKEY   0xc0
+
+typedef uint8_t type_t;
+typedef uint64_t key_t;
+
+// 为类型 type 创建索引
+// 返回：索引头节点的指针 index
+uint64_t create_index(int fd, type_t t);
+
+// 插入一条索引
+int insert_item(int fd, type_t t, uint64_t index, key_t k, uint64_t ptr);
+
+// 使用索引查找目标
+// 返回：ptr
+uint64_t find_item_by_key(int fd, type_t t, uint64_t index, key_t k);
+
+// 使用索引删除项
+int remove_item_by_key(int fd, type_t t, uint64_t index, key_t k);
+
+#endif